Cleaner Waste Systems最新文献_第2页

Innovative methods for the valorisation of solid wastes from sugar mill and refineries for sustainable development: A review

Cleaner Waste Systems

Pub Date : 2025-02-10 DOI: 10.1016/j.clwas.2025.100230

Sana Bano, Kshitij Singh, Anjali Chaudhary, Ram Chandra

The major waste and by-products produced from sugar industries and distilleries are molasses, press mud, bagasse, sugarcane trash, and incinerated spent wash ash. The information of their application is fragmentary from the various countries. Therefore, the present review is comprehensive information regarding the latest methods for safe management practices with valorization. The generated ash after incineration of distillery spent wash have been reported as a source of fertilizer in agriculture due to the high percentage of potash but its environmental impact is not known. The generated ash from the distillery is also used for the removal of dye, metal, and other contaminants from various industrial wastewaters as adsorbent but the safe disposal technique of generated solid waste with adsorbed material of wastewater treatment is also unknown. The bagasse and spent wash ash is also reported for construction materials. Furthermore, the various waste products from sugar and distilleries have been used as solid-state fermentation, and through bioconversion it is converted into various valuable products i.e. single cell protein, soil conditioner, compost, mushroom cultivation bed, enzyme production, organic acid, and biogas generation. The press mud from the sugar industry is widely used for animal feed production and plant growth substances manufacturing. The above method of waste management practices is an innovative process for the sustainable development of industry and the ecosystem.

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引用次数: 0

Utilization of marine waste for the sustainable synthesis of triple superphosphate, dicalcium phosphate, and gypsum: Exploration of crystallographic parameters using XRD data

Cleaner Waste Systems

Pub Date : 2025-02-10 DOI: 10.1016/j.clwas.2025.100231

Nusrat Jahan Tamanna , Md. Sahadat Hossain , Tasnimul Quader Tazim , Sumaya Tabassum , Newaz Mohammed Bahadur , Samina Ahmed

The dwindling reserves of essential raw materials used in synthesizing three industrially valuable materials, triple superphosphate (TSP), dicalcium phosphate dihydrate (DCPD), and gypsum, emphasize the need for sustainable and environment-friendly methods. In the current work, attempts have been undertaken to synthesize these vital compounds via typical wet precipitation methods from marine debris (Ficus gracilis (F.gracilis), Mauritia Arabica (M.arabica), and Trochus orchroleucus (T.orchroleucus)), which are an abundant and easily accessible source of calcium. Afterward, employing X-ray Diffraction (XRD) analysis, the produced triple superphosphate, dicalcium phosphate dihydrate, and gypsum were characterized. A wide range of crystallographic parameters were evaluated, including crystallite size, dislocation density, crystallinity index, microstrain, specific surface area, preference growth, and texture coefficient. Alongside this, different models were used to calculate the crystallite size of synthesized crystals. Among these models, the Williamson–Hall model yielded the most appropriate results for crystallite size, which was determined to be in the approximate range of 47.81–277.30 nm. The preference growth calculation showed a thermodynamically favorable preference along (020), (021), and (010) planes for triple superphosphate, (020), (021), and (041) planes for dicalcium phosphate dihydrate and (020), (040), and (041) planes for gypsum. The results from the texture coefficient showed texturing along (020), (-120) planes for triple superphosphate (021), (020) planes for dicalcium phosphate dihydrate, and (020), (040) planes for gypsum. The similar texturing values of the same compounds indicate the crystal planes' development with aligned planes.

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引用次数: 0

Seasonal variation in solid waste composition and characteristics in a newly formed semi-urban municipality of Nepal

Cleaner Waste Systems

Pub Date : 2025-02-08 DOI: 10.1016/j.clwas.2025.100228

Avash Lohani , Bibhor Bista , Arun Babu Mahato , Ankitam Jay Khanal , Bibash Dulal , Bibek Raj Tripathee , Kajiram Karki , Sher Bahadur Gurung , Sagar Kafle , Bhesh Kumar Karki

An important aspect of municipal solid waste management is analyzing waste stream characteristics, which allows the selection of the appropriate waste management approach for various waste types. This study focuses on finding out the general seasonal variation (summer and winter) in the composition, characteristics, and energy value of municipal solid waste (MSW) in Nepal. A waste generation survey was conducted on 53 households (covering a population of 393 in summer and 388 in winter, determined as a statistically significant sample size), 3 schools, and 2 commercial restaurants in Godawari municipality. The study observed that household solid waste generation was 0.164 kg per capita per day in summer, compared to 0.137 kg per capita per day in winter, marking a 19 % increase in the summer. Despite these differences, a paired t-test revealed no statistically significant seasonal variation, with a p-value of 0.435 (> 0.05). Additionally, the impact of socioeconomic conditions on MSW generation was investigated using a one-way ANOVA test, which revealed a statistically significant correlation between household income levels and waste production with p-value = 0.009 (<0.05). This highlights a clear socioeconomic gradient, with waste generation increasing alongside rising income. In addition, the key MSW component was organic waste, suggesting a greater potential for resource recovery of MSW via composting organic waste and recycling other wastes. The possibility of energy generation via incineration was seen as the average energy value of the waste was estimated as 19.7 MJ/kg, computed from proximate and ultimate analysis. This study can act as a baseline for other municipalities in the country in the absence of prior inquiry into seasonal variation of MSW and its energy value in the context of Nepal.

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引用次数: 0

Paving the way for biochar production, supply chain, and applications toward a sustainable future

Cleaner Waste Systems

Pub Date : 2025-02-07 DOI: 10.1016/j.clwas.2025.100227

Siyuan Zhou , Xiaohan Yang , Thien-Khanh Tran , Jian Shen , Chunjiang An

Biochar, which results from biomass pyrolysis in the absence of oxygen, has been considered a beneficial substance that can enhance environmental benefits. This paper discusses its manufacturing, issues, and uses while focusing on the circular economy aspect. In the past, biochar was used to enhance soil fertility and water treatment; nowadays, it is used for the supply of energy, cleaning up pollutants, and construction materials. The use of new feedstocks like algae and invasive plant species enhances its production and applications. In addition, with the help of digital technology, the biochar supply chain has been improved, thus making it productive and efficient. Biochar emerges as a key factor and beneficiary of green technology advancements that have catalyzed applications in batteries and supercapacitors within energy storage systems. Furthermore, biochar can play a role in the sequestration and reuse of greenhouse gases as well as the reduction of pollution to the environment. Lastly, this research provides an overview of how biochar production and usage, in the face of global environmental challenges and dilemmas, should be enhanced and developed to support sustainable industrialization.

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引用次数: 0

Environmental impact and priority assessment of municipal solid waste management scenarios in Balikpapan City, Indonesia

Cleaner Waste Systems

Pub Date : 2025-02-06 DOI: 10.1016/j.clwas.2025.100223

Muhammad Ma’arij Harfadli , Bimastyaji Surya Ramadan , Mega Ulimaz , Indriyani Rachman , Toru Matsumoto

This study was conducted to determine waste management strategies for the Balikpapan City government by predicting emissions from the existing waste management system and analyzing the reduction of greenhouse gas (GHG) emissions based on several waste management scenarios. This research was conducted in five stages: (1) defining the boundaries of the waste management system, (2) data collection and inventory, (3) analysis of solid waste generation and composition, (4) analysis of GHG emissions using the emission quantification tool (EQT), and (5) identifying criteria and scenario priority using the analytical hierarchy process (AHP). The scenario was developed into three possible scenarios, namely, scenario (A) which means to meet the target of regional policies and strategies, scenario (B) which means to meet the target of the Local Action Plan–Greenhouse Gas Emission Reduction by East Kalimantan and scenario, scenario (C) which means ideal scenario with 100 % waste collection that the waste collection ratio is 60 % collected by the informal waste sector and 40 % collected by the formal sector. The results showed that Scenario C results in a 156 % reduction in GHG emissions when compared to the BAU Scenario. Based on the AHP results, environmental, policymaking, and social are the prioritized criteria affecting waste management scenarios with values of 40, 16, and 15, respectively. Furthermore, the AHP results showed that scenario C, with a value of 52 %, is the most prioritized compared to scenarios A and B.

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引用次数: 0

Efficient activation of bentonite clay for cyanide adsorption using sulfuric acid and sodium ion intercalation

Cleaner Waste Systems

Pub Date : 2025-02-06 DOI: 10.1016/j.clwas.2025.100225

Khairuddin Khairuddin , Muhammad Akbar Ridhawansa , Ruslan Ruslan , Bambang Sardi

This study aims to investigate the most effective way to activate bentonite clay using H₂SO₄ and Na⁺ intercalation. The outcomes were assessed using XRD, XRF, and FTIR analyses. The adsorption process was carried out in batches, and the cyanide adsorbate solution was analyzed using UV–VIS spectrophotometry and a ninhydrin reagent. The optimal concentration of H₂SO₄ was established at 1.5 M, whereas the ideal pH for cyanide was identified as 10.2. XRD analysis provided insights into the Miller indices (d_hkl) of mineral components, variations in crystallinity, shifts in 2Ɵ, and a decrease in basal spacing. The FTIR analysis showed vibrations associated with the hydroxyl group, methylenes, carbonate, water-related vibrations, silica-related groups, and metal-oxygen bonds. These findings confirmed the chemical structure and composition of the activated bentonite clay after treatment. XRF analysis revealed a decrease in the concentrations (wt%) of SiO₂, Fe₂O₃, CaO, TiO₂, and other impurities, as well as an increase in K₂O, compared to the pre-intercalation and pure states. During the post-cyanide adsorption phase, the -OH wavenumber shifted to the left, and the intensity of -CN decreased due to competition between CO₃^2- ions in the adsorbate and CN^- ion adsorbate, limited contact time, and suboptimal pH conditions. Under optimal pH conditions, the H-OH wavenumber shifted to the left, the -OH intensity decreased, and the -CN intensity increased for cyanide removal from water.

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引用次数: 0

Environmental audit in dairy farms: A method to identify and prevent impacts on groundwater

Cleaner Waste Systems

Pub Date : 2025-02-05 DOI: 10.1016/j.clwas.2025.100220

Nicolás Eloy Cisneros Basualdo , Roberto Esteban Miguel , Roxana Banda Noriega , Alejandro Ruiz de Galarreta , Corina Iris Rodriguez

Dairy farming is a key economic activity in Argentina. To achieve sustained growth, farmers adopted various strategies, leading to intensified milk production, but also to increased and accelerated environmental impacts. This study sought to analyze the environmental performance of water use and management in dairy farms in the 'Mar y Sierras' region of the province of Buenos Aires. A diagnostic environmental audit was implemented in five diverse case studies, which were chosen based on production size, location, and socio-productive dynamics. The study involved three stages: (1) a holistic environmental characterization of the farms, (2) farm visits, interviews and chemical analysis of groundwater and wastewater, and (3) proposing mitigation measures for each farm. Production stages vary across farms depending on their physical environment. The critical points identified included the interrelationship between groundwater management, wastewater treatment and disposal. Mitigation proposals tailored to the specific environment of each farm were suggested. Additionally, goals and objectives were established to ensure compliance with current environmental regulations. In conclusion, the environmental audit method enabled to determine the dynamics and operations of the farms, identify the most environmentally critical points based on each farm's natural and socio-economic context and assess their compliance with current environmental regulations.

{"title":"Environmental audit in dairy farms: A method to identify and prevent impacts on groundwater","authors":"Nicolás Eloy Cisneros Basualdo , Roberto Esteban Miguel , Roxana Banda Noriega , Alejandro Ruiz de Galarreta , Corina Iris Rodriguez","doi":"10.1016/j.clwas.2025.100220","DOIUrl":"10.1016/j.clwas.2025.100220","url":null,"abstract":"<div><div>Dairy farming is a key economic activity in Argentina. To achieve sustained growth, farmers adopted various strategies, leading to intensified milk production, but also to increased and accelerated environmental impacts. This study sought to analyze the environmental performance of water use and management in dairy farms in the 'Mar y Sierras' region of the province of Buenos Aires. A diagnostic environmental audit was implemented in five diverse case studies, which were chosen based on production size, location, and socio-productive dynamics. The study involved three stages: (1) a holistic environmental characterization of the farms, (2) farm visits, interviews and chemical analysis of groundwater and wastewater, and (3) proposing mitigation measures for each farm. Production stages vary across farms depending on their physical environment. The critical points identified included the interrelationship between groundwater management, wastewater treatment and disposal. Mitigation proposals tailored to the specific environment of each farm were suggested. Additionally, goals and objectives were established to ensure compliance with current environmental regulations. In conclusion, the environmental audit method enabled to determine the dynamics and operations of the farms, identify the most environmentally critical points based on each farm's natural and socio-economic context and assess their compliance with current environmental regulations.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"10 ","pages":"Article 100220"},"PeriodicalIF":0.0,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143377265","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Feasibility of using bagasse ash incorporating limestone calcined clay cement as ordinary Portland cement replacement for stabilisation of black cotton soils

Cleaner Waste Systems

Pub Date : 2025-02-04 DOI: 10.1016/j.clwas.2025.100226

Horris K. Nangulama , Siya P. Rimoy

In this study, a green and cost-effective cement system was developed with bagasse ash (BA incorporating limestone calcined clay cement (LC³) as ordinary Portland cement (OPC) replacement from black cotton soil (BCS) stabilisation perspective. Effect of BA incorporating 20 % – 60 % range of LC³ on standard consistency (SC), setting time (ST) and compressive strength properties was investigated and optimised through comparison studies with similar properties to BA incorporating 20 % – 60 % range of OPC. Optimum content of BA incorporating LC³ was added to BCS in different mix proportion range of 0–18 %. Effect of addition of different content of BA incorporating LC³ on performance of BCS specimens was examined in terms of compaction, free swell and durability properties. The results show that utilisation of BA incorporating LC³ maintains compressive strength and improves SC as well as ST of BA incorporating LC³ paste. Compared to BA incorporating OPC, BA incorporating 40 % of LC³ content at 0.50 water-cement (w/c) ratio obtained a good comprehensive strength equivalent cement performance. From the experimental results, it was found that addition of BA incorporating LC³ at optimal content significantly improved compaction, swell potential and durability properties of treated BCS. This study demonstrates technical feasibility of BA incorporating LC³ as a cement replacement. It verifies the reuse of by-products from agriculture for application as cementitious materials. The study further promotes the utilisation of BA incorporating LC³ for addressing climate change emergency and reducing high costs for routine BCS stabilisation practice.

{"title":"Feasibility of using bagasse ash incorporating limestone calcined clay cement as ordinary Portland cement replacement for stabilisation of black cotton soils","authors":"Horris K. Nangulama , Siya P. Rimoy","doi":"10.1016/j.clwas.2025.100226","DOIUrl":"10.1016/j.clwas.2025.100226","url":null,"abstract":"<div><div>In this study, a green and cost-effective cement system was developed with bagasse ash (BA incorporating limestone calcined clay cement (LC<sup>3</sup>) as ordinary Portland cement (OPC) replacement from black cotton soil (BCS) stabilisation perspective. Effect of BA incorporating 20 % – 60 % range of LC<sup>3</sup> on standard consistency (SC), setting time (ST) and compressive strength properties was investigated and optimised through comparison studies with similar properties to BA incorporating 20 % – 60 % range of OPC. Optimum content of BA incorporating LC<sup>3</sup> was added to BCS in different mix proportion range of 0–18 %. Effect of addition of different content of BA incorporating LC<sup>3</sup> on performance of BCS specimens was examined in terms of compaction, free swell and durability properties. The results show that utilisation of BA incorporating LC<sup>3</sup> maintains compressive strength and improves SC as well as ST of BA incorporating LC<sup>3</sup> paste. Compared to BA incorporating OPC, BA incorporating 40 % of LC<sup>3</sup> content at 0.50 water-cement (w/c) ratio obtained a good comprehensive strength equivalent cement performance. From the experimental results, it was found that addition of BA incorporating LC<sup>3</sup> at optimal content significantly improved compaction, swell potential and durability properties of treated BCS. This study demonstrates technical feasibility of BA incorporating LC<sup>3</sup> as a cement replacement. It verifies the reuse of by-products from agriculture for application as cementitious materials. The study further promotes the utilisation of BA incorporating LC<sup>3</sup> for addressing climate change emergency and reducing high costs for routine BCS stabilisation practice.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"10 ","pages":"Article 100226"},"PeriodicalIF":0.0,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143295244","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Turning rice waste into opportunity: Circular economy approaches for food waste reduction

Cleaner Waste Systems

Pub Date : 2025-02-04 DOI: 10.1016/j.clwas.2025.100224

Husna Jamaludin , Azhar Mohamad , Hashim Suliman Elshreef Elmaky , Sarina Sulaiman

Food waste presents a significant challenge, highlighting the need for sustainable solutions within a circular economy framework. This study examines the potential of upcycling post-consumer rice waste into high-value rice crackers, analyses customer preferences, and assesses the costs and benefits of these products. In an experimental framework, a Face-Centered Central Composite Design was used to optimise and validate a three-phase process. Under optimal treatment conditions, the produced crackers are crisp and safe to consume. The consumer survey revealed a high level of acceptance and preference for the circular economy model. The cost-benefit analysis indicated economic viability, with higher net gains compared to conventional crackers. This study addresses gaps in rice waste management and illustrates the potential for utilising post-consumer waste to mitigate food waste, thereby contributing to the Sustainable Development Goals. Recommendations for policy and directions for future research are presented to improve food security and sustainability.

引用次数: 0

Solid waste management practices in fast-food restaurants in Lagos megacity: An empirical analysis of customers’ perceptions

Cleaner Waste Systems

Pub Date : 2025-02-04 DOI: 10.1016/j.clwas.2025.100222

Nathaniel Oluwaseun Ogunseye , Stephen Opeyemi Ogundare , Umar Obafemi Salisu

This study investigated customers' perceptions of solid waste management (SWM) practices in fast-food restaurants in Lagos megacity. Adopting a cross-sectional survey design, a multistage sampling technique was used to sample 170 customers of fast-food restaurants. Data collected were analysed using both descriptive and inferential statistics. The results showed that more males patronise fast-food restaurants but most customers were of the youth population. Most customers visit fast-food restaurants at least once a week, spend between N1000 and N5000 ($1.23 and $6.13) per visit, and prefer takeaway services. Plastic, food waste, and polythene are the most generated waste by fast-food restaurants, and their generation is primarily hinged on consumption inevitability. More than half of the customers never dispose of waste within fast-food restaurants, which suggests that the majority are engaged in takeaway services. The most evident SWM initiative adopted by fast-food restaurants is using signage to promote proper waste disposal. The Chi-square test revealed that patronage frequency does not significantly influence the waste disposal practice in fast-food restaurants (χ² =12.459, p = 0.0189). The regression analysis also revealed waste composition significantly impacts customers' engagement in SWM practices with three out of six predictors: food waste (B =0.508, p = 0.000), plastic (B =0.391, p = 0.008) and cans/tins (B =0.369, p = 0.004) exerting the most significant influence. The study concludes that customer engagement in developing SWM strategies and aligning the strategy to the existing SWM regulations in Lagos State is key to sustainable SWM practices in fast-food restaurants in Lagos megacity.

{"title":"Solid waste management practices in fast-food restaurants in Lagos megacity: An empirical analysis of customers’ perceptions","authors":"Nathaniel Oluwaseun Ogunseye , Stephen Opeyemi Ogundare , Umar Obafemi Salisu","doi":"10.1016/j.clwas.2025.100222","DOIUrl":"10.1016/j.clwas.2025.100222","url":null,"abstract":"<div><div>This study investigated customers' perceptions of solid waste management (SWM) practices in fast-food restaurants in Lagos megacity. Adopting a cross-sectional survey design, a multistage sampling technique was used to sample 170 customers of fast-food restaurants. Data collected were analysed using both descriptive and inferential statistics. The results showed that more males patronise fast-food restaurants but most customers were of the youth population. Most customers visit fast-food restaurants at least once a week, spend between <del>N</del>1000 and <del>N</del>5000 ($1.23 and $6.13) per visit, and prefer takeaway services. Plastic, food waste, and polythene are the most generated waste by fast-food restaurants, and their generation is primarily hinged on consumption inevitability. More than half of the customers never dispose of waste within fast-food restaurants, which suggests that the majority are engaged in takeaway services. The most evident SWM initiative adopted by fast-food restaurants is using signage to promote proper waste disposal. The Chi-square test revealed that patronage frequency does not significantly influence the waste disposal practice in fast-food restaurants (χ<sup>2</sup> =12.459, <em>p</em> = 0.0189). The regression analysis also revealed waste composition significantly impacts customers' engagement in SWM practices with three out of six predictors: food waste (B =0.508, <em>p</em> = 0.000), plastic (B =0.391, <em>p</em> = 0.008) and cans/tins (B =0.369, <em>p</em> = 0.004) exerting the most significant influence. The study concludes that customer engagement in developing SWM strategies and aligning the strategy to the existing SWM regulations in Lagos State is key to sustainable SWM practices in fast-food restaurants in Lagos megacity.</div></div>","PeriodicalId":100256,"journal":{"name":"Cleaner Waste Systems","volume":"10 ","pages":"Article 100222"},"PeriodicalIF":0.0,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143295243","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0