Pub Date : 2025-02-17DOI: 10.1016/j.biombioe.2025.107706
Tariq Nawaz Chaudhary , Shaheryar Ahmed , Muhammad Usman , Ali O.M. Maka , Shafqat Rasool , Mohammad Ghaleeh , Baixin Chen
This study investigates the impact of reactor architecture and biocompatibility of anode material on wastewater treatment and power generation in single-chamber (SC) and dual-chamber (DC) microbial fuel cells (MFCs) by utilizing different bacterial food cultures. Comparison between graphite-coated Cu (composite) and 304L stainless steel (SS) anodes is presented under optimized pH (7.13) and temperature (34 °C). Food cultures, especially buttermilk with an acetic acid substrate, significantly enhanced power density (PD), achieving 2.17 W/m2 using composite anode and 1.67 W/m2 using SS in SCMFCs. Mixed food cultures raised performance by ∼50 % achieving 3.31 W/m2 and 2.97 W/m2 using composite and SS anodes respectively. High chemical oxygen demand (COD) removal rates (>68 %) confirm effective wastewater treatment. These findings suggest that macroporous composite anodes can improve microbial compatibility and power output in MFCs, with optimal performance observed at neutral pH and ambient temperatures.
{"title":"Utilizing different food cultures for wastewater treatment and enhanced power generation in microbial fuel cells","authors":"Tariq Nawaz Chaudhary , Shaheryar Ahmed , Muhammad Usman , Ali O.M. Maka , Shafqat Rasool , Mohammad Ghaleeh , Baixin Chen","doi":"10.1016/j.biombioe.2025.107706","DOIUrl":"10.1016/j.biombioe.2025.107706","url":null,"abstract":"<div><div>This study investigates the impact of reactor architecture and biocompatibility of anode material on wastewater treatment and power generation in single-chamber (SC) and dual-chamber (DC) microbial fuel cells (MFCs) by utilizing different bacterial food cultures. Comparison between graphite-coated Cu (composite) and 304L stainless steel (SS) anodes is presented under optimized pH (7.13) and temperature (34 °C). Food cultures, especially buttermilk with an acetic acid substrate, significantly enhanced power density (PD), achieving 2.17 W/m<sup>2</sup> using composite anode and 1.67 W/m<sup>2</sup> using SS in SCMFCs. Mixed food cultures raised performance by ∼50 % achieving 3.31 W/m<sup>2</sup> and 2.97 W/m<sup>2</sup> using composite and SS anodes respectively. High chemical oxygen demand (COD) removal rates (>68 %) confirm effective wastewater treatment. These findings suggest that macroporous composite anodes can improve microbial compatibility and power output in MFCs, with optimal performance observed at neutral pH and ambient temperatures.</div></div>","PeriodicalId":253,"journal":{"name":"Biomass & Bioenergy","volume":"195 ","pages":"Article 107706"},"PeriodicalIF":5.8,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143429178","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-16DOI: 10.1016/j.biombioe.2025.107679
Wangkhem Robinson Singh, Huirem Neeranjan Singh, Mohd Rakimuddin Khan
This study focused on modelling and optimization of castor biodiesel synthesis utilizing a fusion of calcined chicken and duck eggshells doped with potassium bromide (CaO-KBr) catalyst. The eggshells were calcined at a temperature of (800−1000 °C) for 3 h and doped with KBr at a mixing ratio of (4:1–2:1 wt%) and activated at 500−700 °C for 2 h. Characterization of catalysts showed that CaO-KBr catalysts have smaller grains and a greater specific surface area as compared to CaO catalysts. Response surface methodology (RSM), artificial neural network coupled with genetic algorithm (ANN-GA), and adaptive neuro-fuzzy inference system-genetic algorithm (ANFIS-GA) were utilized for the optimization of process parameters. Results showed that the performance of all the models exhibited adequate prediction accuracy with a coefficient of determination (R2) and root mean squared error (RMSE) of ANFIS (0.999, 0.012), ANN (0.925, 0.111) and RSM (0.928, 0.104). Under optimal conditions, maximum biodiesel yield of 97.83 ± 0.49 % was achieved using ANFIS-GA which was higher than ANN-GA (97.28 ± 0.57 %) and RSM (97.04 ± 0.43 %). The reusability study of the CaO-KBr showed improved recyclability up to the 7th cycle (>80 % yield) compared to the CaO catalyst (4th cycle >80 % yield). The properties of the synthesized biodiesel also meet EN 14214 and ASTM D6751 standards. Utilization of CaO-KBr catalyst resulted in cheap and eco-friendly method of castor biodiesel production.
{"title":"Intelligent approaches to process optimization of biodiesel synthesis from Ricinus communis seed using a fusion of chicken and duck eggshells doped with KBr catalyst","authors":"Wangkhem Robinson Singh, Huirem Neeranjan Singh, Mohd Rakimuddin Khan","doi":"10.1016/j.biombioe.2025.107679","DOIUrl":"10.1016/j.biombioe.2025.107679","url":null,"abstract":"<div><div>This study focused on modelling and optimization of castor biodiesel synthesis utilizing a fusion of calcined chicken and duck eggshells doped with potassium bromide (CaO-KBr) catalyst. The eggshells were calcined at a temperature of (800−1000 °C) for 3 h and doped with KBr at a mixing ratio of (4:1–2:1 wt%) and activated at 500−700 °C for 2 h. Characterization of catalysts showed that CaO-KBr catalysts have smaller grains and a greater specific surface area as compared to CaO catalysts. Response surface methodology (RSM), artificial neural network coupled with genetic algorithm (ANN-GA), and adaptive neuro-fuzzy inference system-genetic algorithm (ANFIS-GA) were utilized for the optimization of process parameters. Results showed that the performance of all the models exhibited adequate prediction accuracy with a coefficient of determination (<em>R</em><sup>2</sup>) and root mean squared error (<em>RMSE</em>) of ANFIS (0.999, 0.012), ANN (0.925, 0.111) and RSM (0.928, 0.104). Under optimal conditions, maximum biodiesel yield of 97.83 ± 0.49 % was achieved using ANFIS-GA which was higher than ANN-GA (97.28 ± 0.57 %) and RSM (97.04 ± 0.43 %). The reusability study of the CaO-KBr showed improved recyclability up to the 7<sup>th</sup> cycle (>80 % yield) compared to the CaO catalyst (4<sup>th</sup> cycle >80 % yield). The properties of the synthesized biodiesel also meet EN 14214 and ASTM D6751 standards. Utilization of CaO-KBr catalyst resulted in cheap and eco-friendly method of castor biodiesel production.</div></div>","PeriodicalId":253,"journal":{"name":"Biomass & Bioenergy","volume":"195 ","pages":"Article 107679"},"PeriodicalIF":5.8,"publicationDate":"2025-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143418953","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-16DOI: 10.1016/j.biombioe.2025.107710
Jingcheng Xu , Hao Sun , Xueyuan Pan , Kui Wang , Shu Zhang , Mingzhe Ma , Weihong Tan , Haiquan Liao , Yali Wang , Haobin Yuan , Kang Sun , Jianchun Jiang
CO2 hydrogenation to methanol over efficient catalysts is a significant approach for achieving carbon neutrality. Here we present a CuZn/MC catalyst with enriched Cu+ active sites fabricated through one-step introduction of dispersed Cu-ZnO interfaces on the surface of coconut shell derived mesopore biochar (MC). The CuZn/MC catalyst exhibits a high space-time yield of methanol reached 121.25 gMeOH·Kgcat−1·h−1 with excellent stability more than 50 h at 260 °C, almost triple that of the CuZn/SiO2 catalyst. Controlled experiments confirm that the MC facilitates the highly dispersed Cu species with low valence states, owing to the high specific surface area, narrow mesopore distribution and reducibility of MC. The one-step introduction of bimetal promotes the dispersion and interaction of Cu-ZnO interfaces. The abundant Cu+ sites with high binding energy improve the CO2 hydrogenation to methanol over CuZn/MC catalyst. This work offers a new strategy for constructing efficient biomass derived biochar supported catalysts for methanol synthesis.
{"title":"One-step preparation of coconut shell derived mesoporous biochar supported CuZn catalysts for CO2 hydrogenation to methanol","authors":"Jingcheng Xu , Hao Sun , Xueyuan Pan , Kui Wang , Shu Zhang , Mingzhe Ma , Weihong Tan , Haiquan Liao , Yali Wang , Haobin Yuan , Kang Sun , Jianchun Jiang","doi":"10.1016/j.biombioe.2025.107710","DOIUrl":"10.1016/j.biombioe.2025.107710","url":null,"abstract":"<div><div>CO<sub>2</sub> hydrogenation to methanol over efficient catalysts is a significant approach for achieving carbon neutrality. Here we present a CuZn/MC catalyst with enriched Cu<sup>+</sup> active sites fabricated through one-step introduction of dispersed Cu-ZnO interfaces on the surface of coconut shell derived mesopore biochar (MC). The CuZn/MC catalyst exhibits a high space-time yield of methanol reached 121.25 g<sub>MeOH</sub>·Kg<sub>cat</sub><sup>−1</sup>·h<sup>−1</sup> with excellent stability more than 50 h at 260 °C, almost triple that of the CuZn/SiO<sub>2</sub> catalyst. Controlled experiments confirm that the MC facilitates the highly dispersed Cu species with low valence states, owing to the high specific surface area, narrow mesopore distribution and reducibility of MC. The one-step introduction of bimetal promotes the dispersion and interaction of Cu-ZnO interfaces. The abundant Cu<sup>+</sup> sites with high binding energy improve the CO<sub>2</sub> hydrogenation to methanol over CuZn/MC catalyst. This work offers a new strategy for constructing efficient biomass derived biochar supported catalysts for methanol synthesis.</div></div>","PeriodicalId":253,"journal":{"name":"Biomass & Bioenergy","volume":"195 ","pages":"Article 107710"},"PeriodicalIF":5.8,"publicationDate":"2025-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143418954","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-16DOI: 10.1016/j.biombioe.2025.107704
Yue Zhao , Ping Chen , Huichun Wang , Mingyan Gu , Kun Luo
The introduction of nitrogen sources and metal minerals can significantly promote the adsorption of gases on the biochar surface. However, the mechanisms by which different nitrogen-containing functional groups affect the gas adsorption characteristics on the surface of biochar are different. The addition of minerals increases the complexity of the gas adsorption mechanism of nitrogen-containing biochar, and the gas adsorption mechanism of different nitrogen groups coupled minerals on the surface of biochar is not yet clear. This study uses a combination of experiments and theoretical calculations and introduces urea and the typical mineral Ca to investigate the adsorption mechanism of NO/C3H6O on the surface of biochar influenced by doping of different nitrogen-containing functional groups and CaO. Experimental results indicate that at a low-concentration urea blending ratio, the N functional group in biochar mainly exists as N-5. Pyrolysis experiments with different activation temperatures and residence times are conducted on pyrrole nitrogen-rich biochar (CN1). The results indicate that activation for 1 h at 700 °C is more conducive to the formation of pyrrole nitrogen, and CN1-700-1 has the best gas adsorption performance. The introduction of Ca changes the interaction between molecules and biochar surface from physical adsorption to chemical adsorption with higher selectivity and stronger adsorption capacity, which significantly improves the adsorption performance of biochar. Both the experimental and theoretical calculation results of this study show that the coupling of the N-5 functional group with Ca improves the adsorption performance of biochar and provides theoretical support for the development of multifunctional and efficient adsorbents.
{"title":"Study on the adsorption mechanism of NO/C3H6O on the surface of metallic calcium coupled nitrogen-doped biochar","authors":"Yue Zhao , Ping Chen , Huichun Wang , Mingyan Gu , Kun Luo","doi":"10.1016/j.biombioe.2025.107704","DOIUrl":"10.1016/j.biombioe.2025.107704","url":null,"abstract":"<div><div>The introduction of nitrogen sources and metal minerals can significantly promote the adsorption of gases on the biochar surface. However, the mechanisms by which different nitrogen-containing functional groups affect the gas adsorption characteristics on the surface of biochar are different. The addition of minerals increases the complexity of the gas adsorption mechanism of nitrogen-containing biochar, and the gas adsorption mechanism of different nitrogen groups coupled minerals on the surface of biochar is not yet clear. This study uses a combination of experiments and theoretical calculations and introduces urea and the typical mineral Ca to investigate the adsorption mechanism of NO/C<sub>3</sub>H<sub>6</sub>O on the surface of biochar influenced by doping of different nitrogen-containing functional groups and CaO. Experimental results indicate that at a low-concentration urea blending ratio, the N functional group in biochar mainly exists as N-5. Pyrolysis experiments with different activation temperatures and residence times are conducted on pyrrole nitrogen-rich biochar (CN1). The results indicate that activation for 1 h at 700 °C is more conducive to the formation of pyrrole nitrogen, and CN1-700-1 has the best gas adsorption performance. The introduction of Ca changes the interaction between molecules and biochar surface from physical adsorption to chemical adsorption with higher selectivity and stronger adsorption capacity, which significantly improves the adsorption performance of biochar. Both the experimental and theoretical calculation results of this study show that the coupling of the N-5 functional group with Ca improves the adsorption performance of biochar and provides theoretical support for the development of multifunctional and efficient adsorbents.</div></div>","PeriodicalId":253,"journal":{"name":"Biomass & Bioenergy","volume":"195 ","pages":"Article 107704"},"PeriodicalIF":5.8,"publicationDate":"2025-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143418952","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-16DOI: 10.1016/j.biombioe.2025.107686
Agustina Anselmino , Frank Piedra-Jimenez , María Analía Rodriguez , Rodolfo G. Dondo , Mariana E. Cóccola
Given the increasing focus on renewable energy and the wood-based composites industry's growth, the utilization of solid biomass has risen significantly over the past decade. Forestry and timber processing residues represent the primary and most cost-effective sources of solid biomass globally. However, alternative supply sources, such as short-rotation woody crops (SRWCs), are expected to play a larger role in biomass production, particularly on marginal lands unsuitable for food cultivation.
This paper assesses the economic viability of biomass cultivation for bioenergy purposes by addressing the optimal design and planning of a biomass-to-bioenergy supply chain that considers feedstock sourced from both short-rotation coppices and logging and mill residues. We develop a novel mixed-integer linear programming model to facilitate strategic decisions regarding forest stand establishment and management, as well as the locations and capacities of bioenergy plants. The model determines the optimal timing for crop planting and harvesting, along with the optimal number, location, and size of bioconversion facilities, and the material flows between supply and demand locations.
The applicability of the optimization model is demonstrated by solving a case study in the Mesopotamia Region of Argentina, which hosts the largest and most important forest-industry cluster in the country. A sensitivity analysis is conducted to evaluate the impact of various parameters on the optimal supply chain configuration. The results reveal a strong relationship between heat demand and idle capacity in a cogeneration plant, indicating that this factor affects project profitability more significantly than reductions in power prices.
{"title":"Strategic optimization of short-rotation woody crops for bioenergy production","authors":"Agustina Anselmino , Frank Piedra-Jimenez , María Analía Rodriguez , Rodolfo G. Dondo , Mariana E. Cóccola","doi":"10.1016/j.biombioe.2025.107686","DOIUrl":"10.1016/j.biombioe.2025.107686","url":null,"abstract":"<div><div>Given the increasing focus on renewable energy and the wood-based composites industry's growth, the utilization of solid biomass has risen significantly over the past decade. Forestry and timber processing residues represent the primary and most cost-effective sources of solid biomass globally. However, alternative supply sources, such as short-rotation woody crops (SRWCs), are expected to play a larger role in biomass production, particularly on marginal lands unsuitable for food cultivation.</div><div>This paper assesses the economic viability of biomass cultivation for bioenergy purposes by addressing the optimal design and planning of a biomass-to-bioenergy supply chain that considers feedstock sourced from both short-rotation coppices and logging and mill residues. We develop a novel mixed-integer linear programming model to facilitate strategic decisions regarding forest stand establishment and management, as well as the locations and capacities of bioenergy plants. The model determines the optimal timing for crop planting and harvesting, along with the optimal number, location, and size of bioconversion facilities, and the material flows between supply and demand locations.</div><div>The applicability of the optimization model is demonstrated by solving a case study in the Mesopotamia Region of Argentina, which hosts the largest and most important forest-industry cluster in the country. A sensitivity analysis is conducted to evaluate the impact of various parameters on the optimal supply chain configuration. The results reveal a strong relationship between heat demand and idle capacity in a cogeneration plant, indicating that this factor affects project profitability more significantly than reductions in power prices.</div></div>","PeriodicalId":253,"journal":{"name":"Biomass & Bioenergy","volume":"195 ","pages":"Article 107686"},"PeriodicalIF":5.8,"publicationDate":"2025-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143418955","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-15DOI: 10.1016/j.biombioe.2025.107707
Liyi Zhang , Guangyong Zeng , Jianquan Luo , Yinhua Wan , Benkun Qi
While the mechanism for extracting lignin from biomass using deep eutectic solvent (DES) pretreatment has been widely investigated, few studies have specifically identified the grafting of hydrogen bond donors from DES onto the lignin surface during pretreatment and examined the effect of lignin modification on enzymatic cellulose hydrolysis. This study combines choline chloride (CC) with lactic acid (LA), oxalic acid (OA) and glycerol (Gly) to treat lignin. Structural characterization confirmed the incorporation of LA and OA via esterification, and Gly via etherification, onto lignin surface. Enzymatic hydrolysis results indicated that CC-OA-treated lignin strongly inhibited hydrolysis, with glucose yields ranging from ∼30 % to ∼46 %. In contrast, CC-LA- and CC-Gly-treated lignin exhibited weaker inhibition, with glucose yields varying from ∼50 % to ∼59 % for the former and ∼47 %–∼60 % for the latter, compared to untreated lignin with glucose yields of 51.25 % and 38.95% at two loadings. Notably, a CC-Gly-treated lignin, with lower loading, resulted in glucose yields ranging from 57.02 % to 60.22 %, showing no inhibition on cellulose hydrolysis compared to the control without lignin addition (57.87 %). Physicochemical analyses revealed variations in water contact angle, surface charge, and total phenolic hydroxyl content among DES-treated lignin samples, affecting cellulase-lignin interactions—specifically hydrophobic, electrostatic, and hydrogen bonding. This study clarifies the relationship between DES composition, lignin modification, and enzymatic cellulose hydrolysis efficiency, providing valuable insights into the effects of DES-induced lignin modifications on cellulose saccharification and addressing a significant gap in the literature.
{"title":"Exploring the varied effects of lignin modification during deep eutectic solvents pretreatment on enzymatic cellulose hydrolysis","authors":"Liyi Zhang , Guangyong Zeng , Jianquan Luo , Yinhua Wan , Benkun Qi","doi":"10.1016/j.biombioe.2025.107707","DOIUrl":"10.1016/j.biombioe.2025.107707","url":null,"abstract":"<div><div>While the mechanism for extracting lignin from biomass using deep eutectic solvent (DES) pretreatment has been widely investigated, few studies have specifically identified the grafting of hydrogen bond donors from DES onto the lignin surface during pretreatment and examined the effect of lignin modification on enzymatic cellulose hydrolysis. This study combines choline chloride (CC) with lactic acid (LA), oxalic acid (OA) and glycerol (Gly) to treat lignin. Structural characterization confirmed the incorporation of LA and OA via esterification, and Gly via etherification, onto lignin surface. Enzymatic hydrolysis results indicated that CC-OA-treated lignin strongly inhibited hydrolysis, with glucose yields ranging from ∼30 % to ∼46 %. In contrast, CC-LA- and CC-Gly-treated lignin exhibited weaker inhibition, with glucose yields varying from ∼50 % to ∼59 % for the former and ∼47 %–∼60 % for the latter, compared to untreated lignin with glucose yields of 51.25 % and 38.95% at two loadings. Notably, a CC-Gly-treated lignin, with lower loading, resulted in glucose yields ranging from 57.02 % to 60.22 %, showing no inhibition on cellulose hydrolysis compared to the control without lignin addition (57.87 %). Physicochemical analyses revealed variations in water contact angle, surface charge, and total phenolic hydroxyl content among DES-treated lignin samples, affecting cellulase-lignin interactions—specifically hydrophobic, electrostatic, and hydrogen bonding. This study clarifies the relationship between DES composition, lignin modification, and enzymatic cellulose hydrolysis efficiency, providing valuable insights into the effects of DES-induced lignin modifications on cellulose saccharification and addressing a significant gap in the literature.</div></div>","PeriodicalId":253,"journal":{"name":"Biomass & Bioenergy","volume":"195 ","pages":"Article 107707"},"PeriodicalIF":5.8,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143418949","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-15DOI: 10.1016/j.biombioe.2025.107705
Van M. Dinh , Hue T. Nguyen , Anh M. Nguyen , Hang T. Tran , Duc T. Nguyen , Linh H. Duong , Phuong M. Nguyen , Son V. Tran , Giang H. Le , Huan X. Nguyen , Anh T.Q. Nguyen , Kieu Trang Trinh , Toshiki Tsubota , Minh N. Nguyen
Rice straw, a natural composite of lignocellulose and phytolith, holds great potential for the facile fabrication of biochar associated with phytolith. This study demonstrates a cascading use of biochar associated with phytolith, first for H2S removal from biogas and subsequently as a slow-release source of Si, S and P. Biochar associated with phytolith, referred to as ‘CharPhyt’, was prepared through anaerobic pyrolysis of rice straw and subsequently tested for its capacity to remove H2S from farm biogas. The resulting S-sorbed charPhyt, referred to as charPhytS, was then used to track the release of Si, S, P and other nutrient elements. CharPhyt demonstrated effective performance in H2S removal by converting H2S gas into a solid form. This solid S layer likely acted to reduce the release rates of Si and P. After a 7-day batch experiment, the release rates of Si and P from charPhytS were 9.65 and 0.04 mg/L, respectively. These release rates were ca. 4 and 10 times (respectively) lower than those from charPhyt, which were 39.6 and 0.4 mg/L. The enrichment of S on the surface of charPhyt is proposed as an underlying mechanism through which S likely inhibits the releases of Si and P. In contrast, S maintains an acidic environment, promoting protonation and cation exchange processes, which in turn enhance the release of K, Ca, Mg and Mn. Our findings demonstrate the versatile and practical use of charPhyt for gas purification while creating a slow-release platform for Si, S, P and other nutrients.
{"title":"Biochar-phytolith composite from rice straw: A dual-function material for hydrogen sulfide removal and slow-release nutrient delivery","authors":"Van M. Dinh , Hue T. Nguyen , Anh M. Nguyen , Hang T. Tran , Duc T. Nguyen , Linh H. Duong , Phuong M. Nguyen , Son V. Tran , Giang H. Le , Huan X. Nguyen , Anh T.Q. Nguyen , Kieu Trang Trinh , Toshiki Tsubota , Minh N. Nguyen","doi":"10.1016/j.biombioe.2025.107705","DOIUrl":"10.1016/j.biombioe.2025.107705","url":null,"abstract":"<div><div>Rice straw, a natural composite of lignocellulose and phytolith, holds great potential for the facile fabrication of biochar associated with phytolith. This study demonstrates a cascading use of biochar associated with phytolith, first for H<sub>2</sub>S removal from biogas and subsequently as a slow-release source of Si, S and P. Biochar associated with phytolith, referred to as <em>‘CharPhyt’,</em> was prepared through anaerobic pyrolysis of rice straw and subsequently tested for its capacity to remove H<sub>2</sub>S from farm biogas. The resulting S-sorbed <em>charPhyt</em>, referred to as <em>charPhytS</em>, was then used to track the release of Si, S, P and other nutrient elements. <em>CharPhyt</em> demonstrated effective performance in H<sub>2</sub>S removal by converting H<sub>2</sub>S gas into a solid form. This solid S layer likely acted to reduce the release rates of Si and P. After a 7-day batch experiment, the release rates of Si and P from <em>charPhytS</em> were 9.65 and 0.04 mg/L, respectively. These release rates were ca. 4 and 10 times (respectively) lower than those from <em>charPhyt</em>, which were 39.6 and 0.4 mg/L. The enrichment of S on the surface of <em>charPhyt</em> is proposed as an underlying mechanism through which S likely inhibits the releases of Si and P. In contrast, S maintains an acidic environment, promoting protonation and cation exchange processes, which in turn enhance the release of K, Ca, Mg and Mn. Our findings demonstrate the versatile and practical use of <em>charPhyt</em> for gas purification while creating a slow-release platform for Si, S, P and other nutrients.</div></div>","PeriodicalId":253,"journal":{"name":"Biomass & Bioenergy","volume":"195 ","pages":"Article 107705"},"PeriodicalIF":5.8,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143418950","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-15DOI: 10.1016/j.biombioe.2025.107713
Akanksha Mishra, Meenu Chhabra
The increasing challenge of treating saline wastewater while recovering energy highlights the need for sustainable and efficient solutions. This study presents the performance of a halophilic bacteria and Dunaliella salina-assisted photomicrobial fuel cell (PMFC) in an outdoor operation for COD removal and simultaneously energy production. The PMFCs made of inexpensive material were used for organic matter removal in saline wastewater (between the salinity range 0.5M–1.5M). Lipid-extracted algae (LEA) and starch were used as electron donors at the anode. D. salina at the cathode produces oxygen as an electron acceptor and serves as a valuable source of lipids, glycerol, and β-carotene. The PMFCs were characterized for energy recovery, algae biomass production, and microbial composition. The 0.5M LEA-fed PMFCs produced the highest operating voltage of 615 ± 79 mV across the 100 Ω register and 0.496 kWh/m3 of net energy. Further metagenomic analyses of the operating systems were analyzed to better understand microbial interactions. The comparison of the metagenomic profile of the anodic biofilm of 0.5M LEA-fed PMFC and 1.5M LEA-fed PMFC showed the dominance of the halophilic hat can use complex substrates electrogens like Pseudomonas (0.5M-13.61 %; 1.5M-1.73 %), Blastopirellula (0.5M-13.44 %; 1.5M-0.62 %), Halomonas (0.5M-1.21 %; 1.5M-33.26 %), and Lentimicrobium (0.5M-8.67 %; 1.5M-3.92 %). This work highlights the practical importance of PMFCs in the treatment of saline wastewater, offering both efficient COD removal and sustainable energy generation. The results provide insights into managing microbial communities to improve the performance of the operating PMFCs, facilitating wider applications in saline wastewater management.
{"title":"Removal of organic pollutants from saline waste using Dunaliella and halophilic bacteria in photomicrobial fuel cells","authors":"Akanksha Mishra, Meenu Chhabra","doi":"10.1016/j.biombioe.2025.107713","DOIUrl":"10.1016/j.biombioe.2025.107713","url":null,"abstract":"<div><div>The increasing challenge of treating saline wastewater while recovering energy highlights the need for sustainable and efficient solutions. This study presents the performance of a halophilic bacteria and <em>Dunaliella salina</em>-assisted photomicrobial fuel cell (PMFC) in an outdoor operation for COD removal and simultaneously energy production. The PMFCs made of inexpensive material were used for organic matter removal in saline wastewater (between the salinity range 0.5M–1.5M). Lipid-extracted algae (LEA) and starch were used as electron donors at the anode. <em>D. salina</em> at the cathode produces oxygen as an electron acceptor and serves as a valuable source of lipids, glycerol, and β-carotene. The PMFCs were characterized for energy recovery, algae biomass production, and microbial composition. The 0.5M LEA-fed PMFCs produced the highest operating voltage of 615 ± 79 mV across the 100 Ω register and 0.496 kWh/m<sup>3</sup> of net energy. Further metagenomic analyses of the operating systems were analyzed to better understand microbial interactions. The comparison of the metagenomic profile of the anodic biofilm of 0.5M LEA-fed PMFC and 1.5M LEA-fed PMFC showed the dominance of the halophilic hat can use complex substrates electrogens like <em>Pseudomonas</em> (0.5M-13.61 %; 1.5M-1.73 %), <em>Blastopirellula</em> (0.5M-13.44 %; 1.5M-0.62 %), <em>Halomonas</em> (0.5M-1.21 %; 1.5M-33.26 %), and <em>Lentimicrobium</em> (0.5M-8.67 %; 1.5M-3.92 %). This work highlights the practical importance of PMFCs in the treatment of saline wastewater, offering both efficient COD removal and sustainable energy generation. The results provide insights into managing microbial communities to improve the performance of the operating PMFCs, facilitating wider applications in saline wastewater management.</div></div>","PeriodicalId":253,"journal":{"name":"Biomass & Bioenergy","volume":"195 ","pages":"Article 107713"},"PeriodicalIF":5.8,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143418951","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-14DOI: 10.1016/j.biombioe.2025.107685
Indok Zarith Syuhada Dzolkepli , Mohd Faizal Hasan , Mohd Fairus Mohd Yasin , Norazila Othman , Aizuddin Supee , Mohamad Azri Sukiran
Torrefaction is a viable pretreatment method to enhance the fuel properties of various lignocellulosic feedstocks. While electrical torrefaction offers process control flexibility, it typically relies on grid electricity, which is generated mostly from fossil fuel sources. This reliance can undermine the overall sustainability and environmental benefits of the process. To address this issue, solar-driven torrefaction serves as an alternative approach to replace the electrical torrefaction methods that rely on non-renewable energy sources. This innovative approach harnesses renewable solar energy, offering a more sustainable and carbon-neutral solution for biomass conversion. This article aims to review the integration of solar energy into the torrefaction process and evaluate its impact on biomass properties. Following a detailed analysis of solar torrefaction, including experimental setups and the influence of parameters, the paper discusses the challenges associated with solar torrefaction systems and provides insights into future perspectives. The review shows that the solar torrefied products exhibit improved qualities and are highly competitive compared to the electrical torrefied products and commercial coals. Additionally, previous researchers have primarily focused on the impact of temperature and residence time, with limited exploration of other parameters and analyses. Therefore, future research should further explore the impact of other parameters and address the technical challenges such as intermittent nature of solar energy, uneven distribution of heat energy and process control complexity. By addressing these challenges, solar torrefaction can be scaled up and commercialized.
{"title":"Solar-driven torrefaction for sustainable bioenergy production: A review","authors":"Indok Zarith Syuhada Dzolkepli , Mohd Faizal Hasan , Mohd Fairus Mohd Yasin , Norazila Othman , Aizuddin Supee , Mohamad Azri Sukiran","doi":"10.1016/j.biombioe.2025.107685","DOIUrl":"10.1016/j.biombioe.2025.107685","url":null,"abstract":"<div><div>Torrefaction is a viable pretreatment method to enhance the fuel properties of various lignocellulosic feedstocks. While electrical torrefaction offers process control flexibility, it typically relies on grid electricity, which is generated mostly from fossil fuel sources. This reliance can undermine the overall sustainability and environmental benefits of the process. To address this issue, solar-driven torrefaction serves as an alternative approach to replace the electrical torrefaction methods that rely on non-renewable energy sources. This innovative approach harnesses renewable solar energy, offering a more sustainable and carbon-neutral solution for biomass conversion. This article aims to review the integration of solar energy into the torrefaction process and evaluate its impact on biomass properties. Following a detailed analysis of solar torrefaction, including experimental setups and the influence of parameters, the paper discusses the challenges associated with solar torrefaction systems and provides insights into future perspectives. The review shows that the solar torrefied products exhibit improved qualities and are highly competitive compared to the electrical torrefied products and commercial coals. Additionally, previous researchers have primarily focused on the impact of temperature and residence time, with limited exploration of other parameters and analyses. Therefore, future research should further explore the impact of other parameters and address the technical challenges such as intermittent nature of solar energy, uneven distribution of heat energy and process control complexity. By addressing these challenges, solar torrefaction can be scaled up and commercialized.</div></div>","PeriodicalId":253,"journal":{"name":"Biomass & Bioenergy","volume":"195 ","pages":"Article 107685"},"PeriodicalIF":5.8,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143403531","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-02-14DOI: 10.1016/j.biombioe.2025.107681
Gislane Pinho de Oliveira , Iñaki Adánez-Rubio , Tiago Roberto da Costa , Dulce Maria de Araújo Melo , Renata Martins Braga , Juan Adanez
The use of renewable fuels, as biomass, in the chemical looping combustion process becomes an attractive solution to bioenergy technology with CO2 capture (BECCS). In this work, a manganese ore from Brazil (MnT1000) was evaluated as an oxygen carrier to promote the conversion of a pine residue biomass by the in-situ Gasification-Chemical Looping Combustion (iG-CLC) technology in a 0.5 kWth continuous experimental unit installed at ICB-CSIC. The main parameters studied were the influence of fuel reactor temperature, air excess, and oxygen-to-biomass ratio on the performance of the MnT1000 evaluating CO2 capture efficiency and total oxygen demand. Under all experimental conditions, CO2 composition was higher than 84% at the fuel reactor outlet gas on a dry N2-free basis. The unburned gases such as CH4, CO and H2 were present in low concentration, attributed to the high reactivity that MnT1000 has with H2, CO and CH4. In general, higher temperatures, higher oxygen excess ratio and lower oxygen-to-biomass ratio reduced the total oxygen demand, with no great influence on CO2 capture efficiency. Most of the experiments showed capture efficiency above 90%, and a total oxygen demand in between 5.9 and 13.7% for the experimental conditions studied with low specific solid inventories (760 – 833 kg MW−1). The amount of tar quantified in this study was low, corresponding to a total of 1.32 g Nm−3, composed mainly of naphthalene and phenanthrene. In all experimental conditions, MnT1000 showed promising behavior, its reactivity remained high and constant throughout whole operation and no agglomeration problems were observed.
{"title":"Negative CO2 emissions through iG-CLC of pinus residue in a continuous unit of 0.5 kWth using a natural Mn-based oxygen carrier","authors":"Gislane Pinho de Oliveira , Iñaki Adánez-Rubio , Tiago Roberto da Costa , Dulce Maria de Araújo Melo , Renata Martins Braga , Juan Adanez","doi":"10.1016/j.biombioe.2025.107681","DOIUrl":"10.1016/j.biombioe.2025.107681","url":null,"abstract":"<div><div>The use of renewable fuels, as biomass, in the chemical looping combustion process becomes an attractive solution to bioenergy technology with CO<sub>2</sub> capture (BECCS). In this work, a manganese ore from Brazil (MnT1000) was evaluated as an oxygen carrier to promote the conversion of a pine residue biomass by the <em>in-situ</em> Gasification-Chemical Looping Combustion (<em>i</em>G-CLC) technology in a 0.5 kW<sub>th</sub> continuous experimental unit installed at ICB-CSIC. The main parameters studied were the influence of fuel reactor temperature, air excess, and oxygen-to-biomass ratio on the performance of the MnT1000 evaluating CO<sub>2</sub> capture efficiency and total oxygen demand. Under all experimental conditions, CO<sub>2</sub> composition was higher than 84% at the fuel reactor outlet gas on a dry N<sub>2</sub>-free basis. The unburned gases such as CH<sub>4</sub>, CO and H<sub>2</sub> were present in low concentration, attributed to the high reactivity that MnT1000 has with H<sub>2</sub>, CO and CH<sub>4</sub>. In general, higher temperatures, higher oxygen excess ratio and lower oxygen-to-biomass ratio reduced the total oxygen demand, with no great influence on CO<sub>2</sub> capture efficiency. Most of the experiments showed capture efficiency above 90%, and a total oxygen demand in between 5.9 and 13.7% for the experimental conditions studied with low specific solid inventories (760 – 833 kg MW<sup>−1</sup>). The amount of tar quantified in this study was low, corresponding to a total of 1.32 g Nm<sup>−3</sup>, composed mainly of naphthalene and phenanthrene. In all experimental conditions, MnT1000 showed promising behavior, its reactivity remained high and constant throughout whole operation and no agglomeration problems were observed.</div></div>","PeriodicalId":253,"journal":{"name":"Biomass & Bioenergy","volume":"195 ","pages":"Article 107681"},"PeriodicalIF":5.8,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143403530","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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