Carbon Resources Conversion最新文献_第3页

Low-cost biomass ash-based adsorbent for removal of hydrogen sulfide gas 用于去除硫化氢气体的低成本生物质灰基吸附剂

IF 7.5 3区环境科学与生态学 Q2 ENERGY & FUELS

Carbon Resources Conversion

Pub Date : 2025-03-31 DOI: 10.1016/j.crcon.2025.100327

Kanathip Promnuan , Rusmanee Ma , Marisa Raketh , Prawit Kongjan , Saowapa Chotisuwan , Rattana Jariyaboon

This research aims to use boiler-biomass ash to produce low-cost and efficient adsorbent for removing hydrogen sulfide (H₂S) in biogas from small scale biogas plant. To reduce pressure drop across adsorbent bed during the practical adsorption, clay was selected as a binder to perform the extruded adsorbent. 15 different adsorbents using different proportion of ash to clay (70–90 %) together with the an amount of NH₄HCO₃ as pore-forming reagent (0–6 %), and baking temperature (100–500 °C) were prepared. From the breakthrough cure studies using fixed-bed column fed by 0.1 L/min synthetic H₂S containing gas, it was found that quadratic equation with R² 0.75 can be used to optimize adsorption preparation and predict H₂S adsorption capacity. The optimized adsorbent prepared using 79 % ash, and 2.5 % NH₄HCO₃ at 293 °C was validated and had achieved H₂S adsorption capacity of 3.67–3.88 mg/g. The characterization results, including BET surface area analysis and SEM imaging, show significant pore formation due to the presence of NH₄HCO₃. CHNS/O SEM-EDX, and XRF analyses confirmed that there wasan increase in sulfur content of the post-adsorbent. The decrease in surface area and change of functional groups in FTIR spectrum of the spent adsorbent, and presence of metal elements supporting the chemisorption mechanism were also discovered. The best fitted breakthrough curve operated at 200–10,000 ppm H₂S containing gas to Thomas model which could be implemented for further scaling up are also proposed. This is a successful attempt to use an abundance industrial waste, eco-friendly local material and novel pore forming agent in order to create an eco-efficient adsorbent for H₂S removal.

本研究旨在利用锅炉-生物质灰制备低成本高效的吸附剂，用于去除小型沼气厂沼气中的硫化氢。为了减少实际吸附过程中吸附床间的压降，选择粘土作为粘结剂进行挤压吸附剂。以不同灰土比（70 ~ 90%）和NH4HCO3（0 ~ 6%）为成孔剂，焙烧温度（100 ~ 500℃）为条件，制备了15种不同的吸附剂。通过0.1 L/min含合成H2S气体进料固定床柱的突破性固化研究，发现R2为0.75的二次方程可用于优化吸附制备和预测H2S吸附量。以79%灰分、2.5% NH4HCO3为吸附剂，在293℃条件下制备的最佳吸附剂吸附H2S的容量为3.67 ~ 3.88 mg/g。表征结果，包括BET表面积分析和SEM成像，表明NH4HCO3的存在导致了明显的孔隙形成。CHNS/O SEM-EDX和XRF分析证实，后吸附剂的硫含量有所增加。废吸附剂的表面积减小，FTIR光谱中官能团的变化，以及支持化学吸附机理的金属元素的存在。对Thomas模型来说，在200-10,000 ppm含H2S气体条件下的最佳拟合突破曲线可以进一步扩大规模。这是一次成功的尝试，利用丰富的工业废物、环保的当地材料和新型的成孔剂，来创造一种生态高效的H2S去除吸附剂。

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引用次数: 0

Regulating metal–acid active sites in hierarchical porous Ni/Y for selective hydrocracking of naphthalene 调控分层多孔Ni/Y中金属酸活性位点对萘选择性加氢裂化的影响

IF 7.5 3区环境科学与生态学 Q2 ENERGY & FUELS

Carbon Resources Conversion

Pub Date : 2025-03-19 DOI: 10.1016/j.crcon.2025.100326

Xiaoyang Kong , Jinlin Mei , Zhentao Liu , Yutong Zou , Enhua Wang , Wei Wang , Chunya Wang , Chunming Xu , Xilong Wang

The preparation of high efficiency hydrocracking (HCK) catalyst is the key to the production of BTX (benzene, toluene and xylene) from polycyclic aromatic hydrocarbons (PAHs). In this work, the recrystallized Y zeolite (RCY) was obtained by structural reorganization of the microporous parent Y zeolite (PY), and a series of Ni/RCY catalysts with different metal–acid active sites were prepared by ethylenediamine coordination impregnation, which were used for the BTX production by hydrocracking of naphthalene. The suitable acidity and hierarchical pore structure of Ni/RCY could promote the dispersion of Ni metal, thus forming small-sized nanoparticles, which is in favor of the accessibility and diffusion of naphthalene. Besides, the electron-deficient Ni species between adjacent acid sites and metals could be generated on Ni/RCY, which could improve the metal-support interaction (MSI) and catalytic activity. Ni/RCY-4 catalyst showed the superior hydrocracking conversion (99.7 %), BTX yield (39.1 %), the reaction rate constant (k, 3.1 h⁻¹) and turnover frequency (TOF, 16.6 h⁻¹) of selective hydrocracking. The activation energy was lowest (64.1kJ·mol⁻¹) among the reported catalysts in the literature. Moreover, the possible reaction mechanism of selective hydrocracking of naphthalene to BTX was further proposed.

制备高效加氢裂化催化剂是多环芳烃（PAHs）生产苯、甲苯和二甲苯的关键。本文通过对微孔母体Y沸石（PY）进行结构重组得到了重结晶Y沸石（RCY），并通过乙二胺配位浸渍法制备了一系列具有不同金属酸活性位点的Ni/RCY催化剂，用于萘加氢裂化生产BTX。Ni/RCY合适的酸度和分级孔结构可以促进金属镍的分散，形成小尺寸的纳米颗粒，有利于萘的可及性和扩散。此外，在Ni/RCY上，相邻的酸位和金属之间会产生缺电子的Ni，从而提高了金属-载体相互作用（MSI）和催化活性。Ni/RCY-4催化剂表现出较好的选择性加氢裂化转化率（99.7%）、BTX收率（39.1%）、反应速率常数（k, 3.1 h−1）和周转频率（TOF, 16.6 h−1）。其活化能最低，为64.1kJ·mol−1。进一步提出了萘选择性加氢裂化制BTX的可能反应机理。

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引用次数: 0

Research on the process of naphtha hydrocracking to chemical materials 石脑油加氢裂化制化工原料工艺研究

IF 6.4 3区环境科学与生态学 Q2 ENERGY & FUELS

Carbon Resources Conversion

Pub Date : 2025-03-17 DOI: 10.1016/j.crcon.2025.100315

Kui Zhang, Zhihai Hu, Liang Ren, Hong Nie, Guangle Zhao, Yuanbing Xi, Chunlu Wang

To systematically study the conversion process of paraffin, cycloalkane, and aromatic on ZSM-5 molecular sieve in naphtha hydrocracking, a series of related experiments were carried out based on the prepared hydrocracking catalyst, Catalyst-HC. Ni and ZSM-5 molecular sieve were selected as the hydrogenation active component and the cracking component of Catalyst-HC, respectively. The results obtained through this work indicate that on ZSM-5 molecular sieve, the paraffin and cycloalkane in naphtha are mainly convertible hydrocarbons. The higher the content of convertible hydrocarbons in naphtha, the easier it is for the conversion reaction to occur. As C₅₊ conversion rate rises, the yields of paraffin and cycloalkane decline, and the yields of aromatic and aromatic-carbon in product-naphtha remain almost unchanged. The aromatic-average carbon-number (CN) in product-naphtha changes very little, decreasing from 8.3 to 8.2. This means that almost no aromatic undergoes the saturation reaction or conversion reaction on Catalyst-HC. Due to the small pore size of ZSM-5, C₅₊ i-paraffin has a lower conversion rate and a higher average CN compared to C₅₊ n-paraffin. Meanwhile, as C₅₊ conversion rate gradually rises from 0 to 23 %, the average CN drop-values of C₅₊ n-paraffin and C₅₊ i-paraffin are 1.3 and 0.14, respectively. C₅-ring cycloalkane-ring-carbon (C₅-ring CRC) is more likely undergoing ring-opening (RO) reaction than that of C₆-ring cycloalkane-ring-carbon (C₆-ring CRC). The conversion rate of C₅-C₇ cycloalkane is higher than that of C₈₊ cycloalkane, and the former bears a higher jump-value compared to the latter with the increase of C₅₊ conversion rate. Unlike paraffin and aromatic, the average CN of cycloalkane gradually rises with the increase of C₅₊ conversion rate.

为系统研究石脑油加氢裂化过程中石蜡、环烷烃和芳烃在ZSM-5分子筛上的转化过程，以制备的加氢裂化催化剂catalyst - hc为基础，进行了一系列相关实验。选用Ni分子筛和ZSM-5分子筛分别作为催化剂的加氢活性组分和裂化组分。研究结果表明，在ZSM-5分子筛上，石脑油中的石蜡和环烷烃主要为可转化烃。石脑油中可转化烃的含量越高，越容易发生转化反应。随着C5+转化率的提高，石蜡和环烷烃的产率下降，产物石脑油中芳烃和芳烃的产率基本保持不变。产物石脑油的芳烃平均碳数（CN）变化不大，由8.3降至8.2。这意味着在hc催化剂上几乎没有芳香族发生饱和反应或转化反应。由于ZSM-5的孔径较小，与C5+ n-烷烃相比，C5+ i-烷烃的转化率较低，平均CN值较高。同时，随着C5+转化率从0逐渐上升到23%，C5+正构烷烃和C5+正构烷烃的CN平均下降值分别为1.3和0.14。c5环环烷烃-环碳（c5环CRC）比c6环环烷烃-环碳（c6环CRC）更容易发生开环（RO）反应。C5- c7环烷烃的转化率高于C8+环烷烃，且随着C5+转化率的增加，C5- c7环烷烃的跳跃值高于C8+环烷烃。与烷烃和芳烃不同，环烷烃的平均CN随着C5+转化率的提高而逐渐升高。

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引用次数: 0

3D-porous activated carbon morphological modification of Manihot esculenta tuber and Bambusa blumeana stem for high-power density supercapacitor: Biomass waste to sustainable energy 用于高功率密度超级电容器的马尼洪块茎和青竹茎的3d多孔活性炭形态改性：生物质废弃物到可持续能源

IF 7.5 3区环境科学与生态学 Q2 ENERGY & FUELS

Carbon Resources Conversion

Pub Date : 2025-03-10 DOI: 10.1016/j.crcon.2025.100313

Markus Diantoro , Nuviya Illa Muthi Aturroifah , Ishmah Luthfiyah , Joko Utomo , Ida Hamidah , Brian Yuliarto , Andrivo Rusydi , Santi Maensiri , Worawat Meevasana

Activated carbon derived from biomass is an environmentally friendly and low-cost supercapacitor electrode material. The diverse morphology and pore shape of activated carbon have a significant impact on enhancing the storage capacity of supercapacitors. However, the disparate distribution of pore sizes in activated carbon has a negative effect on energy density. In the present study, the synthesis and modification of the carbon pore structure of Manihot esculenta tuber and Bambusa blumeana stem was carried out using a sonochemical-assisted hydrothermal method with various chemicals (0.06 M KOH, 0.06 M PVP, 0.06 M ZnCl₂). The 3D pore structure of the sample modified with 0.06 M ZnCl₂ exhibited a well-defined microporous architecture and a substantial specific surface area of 516.29 m²g⁻¹, leading to excellent electrochemical performance in coin cell supercapacitors. A high power density of 1086.12 Wkg⁻¹ at a voltage window of 2 V has been attained, with a corresponding current density of 0.3 Ag⁻¹. Remarkably, after 5000 charge and discharge cycles, the capacitance retention was maintained at 90.8 %. The high power density produced from biomass activated carbon based on Manihot esculenta tuber and Bambusa blumeana stem modified using 0.06 M ZnCl₂ provides a practical approach for environmentally friendly electrical energy storage devices and realizes rapid mass transportation.

生物质活性炭是一种环保、低成本的超级电容器电极材料。活性炭的不同形态和孔隙形状对提高超级电容器的存储容量有显著影响。然而，活性炭中不同孔径的分布对能量密度有负面影响。本研究采用声化学辅助水热法，以0.06 M KOH, 0.06 M PVP， 0.06 M ZnCl2为原料，合成并改性了马尼洪和青竹茎的碳孔结构。0.06 M ZnCl2修饰后的样品三维孔结构具有良好的微孔结构，比表面积达到516.29 m2−1，具有优异的纽扣电池超级电容器电化学性能。在2v的电压窗下，获得了1086.12 Wkg−1的高功率密度，对应的电流密度为0.3 Ag−1。值得注意的是，经过5000次充放电循环后，电容保持率保持在90.8%。以0.06 M ZnCl2改性的马尼特块茎和竹茎为原料制备高功率密度生物质活性炭，为环保储能装置和实现快速大规模运输提供了切实可行的途径。

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引用次数: 0

Synergism, pyrolysis performance, product distribution and characteristics in the co-pyrolysis of date palm waste and polyethylene foam: Harnessing the potential of plastics and biomass valorization 椰枣废料和聚乙烯泡沫共热解的协同作用、热解性能、产品分布和特性：利用塑料和生物质增值的潜力

IF 6.4 3区环境科学与生态学 Q2 ENERGY & FUELS

Carbon Resources Conversion

Pub Date : 2025-03-10 DOI: 10.1016/j.crcon.2025.100312

Ahmad Nawaz , Shaikh Abdur Razzak

The current methods of disposing of plastic waste, such as dumping or burning, create significant ecological problems and cause irreparable damage to valuable resources. This is especially true for plastics with complex structures, like polyethylene foams (PEF). This study focuses on how the plastic composition affects the interactions, kinetics, thermodynamics, yield of pyrolysis products, and their characterization during the co-pyrolysis of date palm waste (DPW) and PEF. Co-pyrolysis experiments were conducted at three different heating rates (10, 20, and 30 °C/min) and with varying biomass ratios to plastic. The kinetic parameters were evaluated using different isoconversional techniques such as Kissinger Akahira Sunose (KAS), Vyazovkin (VZK), Ozawa Flynn Wall (OFW), and Friedman (FM). The average value of activation energy based on the Vyazovkin model is 96.31, 216.33, 232.85, 382.69, and 206.47 kJ/mol for DPW, PEF, 75PEF25DPW, 25PEF75DPW, and 50PEF50DPW, respectively. The thermodynamic results showed that the average difference between activation energy and enthalpy is 4.89, 6.02, 5.81, 5.36, and 5.61 kJ/mol for the DPW, PEF, 75PEF25DPW, 25PEF75DPW, and 50PEF50DPW, respectively. It is lowest for the DPW and highest for the PEF, whereas it is significantly lower for the mixes, indicating that the mixes consume less energy. Criado’s master plot suggested that the co-pyrolysis of DPW and PEF followed D1 (one-dimensional) and D3 (three-dimensional) reaction mechanisms. Further, co-pyrolysis results from the fixed bed reactor confirmed maximum bio-oil yield (38.85 wt%) was achieved at 50PEF50DPW ratio. The results of this study suggest that combining waste date palms with PEF could be a promising option for improving the co-pyrolysis process.

目前处理塑料废物的方法，如倾倒或焚烧，造成了严重的生态问题，并对宝贵的资源造成了不可弥补的损害。对于结构复杂的塑料来说尤其如此，比如聚乙烯泡沫塑料（PEF）。研究了塑料组分对枣椰树废弃物和PEF共热解过程中相互作用、动力学、热力学、热解产物产率及其表征的影响。在三种不同的升温速率（10、20和30°C/min）和不同的生物质与塑料的比例下进行共热解实验。采用Kissinger Akahira Sunose （KAS）、Vyazovkin （VZK）、Ozawa Flynn Wall （OFW）和Friedman （FM）等转换技术对动力学参数进行了评价。基于Vyazovkin模型的DPW、PEF、75PEF25DPW、25PEF75DPW和50PEF50DPW的平均活化能分别为96.31、216.33、232.85、382.69和206.47 kJ/mol。热力学结果表明，DPW、PEF、75PEF25DPW、25PEF75DPW和50PEF50DPW的活化能和焓的平均差值分别为4.89、6.02、5.81、5.36和5.61 kJ/mol。DPW的能量最低，PEF的能量最高，而混合料的能量明显较低，表明混合料消耗的能量更少。Criado的主图表明，DPW和PEF共热解遵循D1（一维）和D3（三维）反应机制。此外，固定床反应器的共热解结果证实，在50PEF50DPW比下，生物油收率最高（38.85 wt%）。本研究结果表明，将废椰枣与PEF结合可能是改善共热解过程的一种有希望的选择。

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引用次数: 0

Anaerobic co-digestion of glycerol waste and distillery wastewater for bio-hythane production: Performance and ADM-1 based kinetics 甘油废物和蒸馏废水厌氧共消化用于生物乙烷生产：性能和基于ADM-1的动力学

IF 6.4 3区环境科学与生态学 Q2 ENERGY & FUELS

Carbon Resources Conversion

Pub Date : 2025-03-07 DOI: 10.1016/j.crcon.2025.100311

Khaliyah Sani , Sompong O-Thong , Rattana Jariyaboon , Alissara Reungsang , Hidenari Yasui , Prawit Kongjan

Glycerol waste (GW), with its high carbon content, was co-digested with nitrogen-rich distillery wastewater (DW) in this experiment to evaluate hydrogen and methane production in a two-stage anaerobic digestion (AD) system. Bio-hydrogen potential (BHP) and methane potential (BMP) were conducted under thermophilic conditions (55°C) for the co-digestion of GW and acetone-butanol-ethanol distillery wastewater (ABE-DW) at various mixing ratios of 0:100, 20:80, 40:60, 50:50, 60:40, 80:20, and 100:0 (%VS) to determine the optimal mixing ratio. The highest BHP of 147 mL-H₂/g-VS and BMP of 650 mL-CH₄/g-VS were achieved at a GW to ABE-DW mixing ratio 50:50. Then. the process proceded with the continuous two-stage anaerobic process which was later implemented with the continuously stirred tank reactor (CSTR) for hydrogen production and the up-flow anaerobic sludge blanket (UASB) reactor for methane production in order to assess system performance. A mixture of GW and DW from commercial ethanol production (ethanol-DW) at a 50:50 mixing ratio was fed into the CSTR at a 4-day HRT, and the CSTR effluent was subsequently fed into the UASB at 21-day and 18-day HRTs. The CSTR achieved a hydrogen yield of 83.6 mL-H₂/g-VS, while methane yields in the UASB were 367 mL-CH₄/g-VS at a 21-day HRT and 440 mL-CH₄/g-VS at an 18-day HRT. Additionally, the original ADM-1 was modified to describe the two-stage anaerobic co-digestion of GW and DW. This enhanced model effectively predicts the performance of the two-stage anaerobic process for co-digesting GW and DW.

以含碳量高的甘油废渣（GW）与富氮蒸馏废水（DW）共消化为研究对象，对两级厌氧消化（AD）系统的产氢产甲烷效果进行了评价。在55℃的高温条件下，以0:100、20:80、40:60、50:50、60:40、80:20和100:0 （%VS）的混合比例，对GW和丙酮-丁醇-乙醇蒸馏废水（ABE-DW）进行生物氢势（BHP）和甲烷势（BMP）测定，确定最佳混合比例。当GW与ABE-DW的混合比为50:50时，BHP达到147 mL-H2/g-VS， BMP达到650 mL-CH4/g-VS。然后。该工艺采用连续两级厌氧工艺，随后采用连续搅拌槽式反应器（CSTR）生产氢气和上流式厌氧污泥毯式反应器（UASB）生产甲烷，以评估系统性能。在4天的HRT下，将商业乙醇生产的GW和DW（乙醇-DW）按50:50的混合比例送入CSTR，随后在21天和18天的HRT下，将CSTR出水送入UASB。CSTR的氢气产量为83.6 mL-H2/g-VS，而UASB的甲烷产量在21天的HRT下为367 mL-CH4/g-VS，在18天的HRT下为440 mL-CH4/g-VS。此外，对原来的ADM-1进行了修改，以描述GW和DW的两阶段厌氧共消化。该增强模型有效地预测了两级厌氧工艺共消化GW和DW的性能。

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引用次数: 0

Renewable activated carbon from wood-based gasification char: A comprehensive study on physical activation 木质气化炭再生活性炭：物理活化的综合研究

IF 6.4 3区环境科学与生态学 Q2 ENERGY & FUELS

Carbon Resources Conversion

Pub Date : 2025-03-05 DOI: 10.1016/j.crcon.2025.100310

David Gurtner , Jan O. Back , Dominik Bosch , Angela Hofmann , Christoph Pfeifer

Wood gasification produces gasification char (GC), a carbonaceous by-product with limited sustainable valorisation strategies. The physical activation of wood-based GC as a precursor has received insufficient attention, likely due to the inherent challenges associated with the precursor, namely its soft skeleton, high degree of graphitisation, ash content, and reduced porosity. This study investigates methods to enhance the porosity and adsorption properties of renewable activated carbon (AC) derived from GC while maximising yield using a Design of Experiments approach. Yield-oriented porosity optimisation revealed that mild H₂O activation (

⩽

750 °C,

⩾

20 min) was the most effective, followed by CO₂ activation at 817 °C and 16.2 min. The AC with the highest overall porosity was produced by sequential activation, leveraging the high surface area obtained from H₂O activation (812 m²/g) and the high micropore fraction from CO₂ activation (49.3 vol%). In micropollutant adsorption assays, this AC (maximum adsorption capacity

q_{\max}

for metoprolol:

89.9 mg / g

) partially outperformed commercial AC (

89.1 mg / g

). We found that the utilisation of GC for AC production represents a fundamentally distinct starting point when compared to previously employed precursors, as evidenced by significantly reduced activation times and temperatures. This study provides valuable insights for the efficient conversion of GC into high-value AC, a pathway of significant interest for industrial applications.

木材气化产生气化炭（GC），这是一种碳质副产品，具有有限的可持续增值策略。木质GC作为前驱体的物理活化受到的关注不够，可能是由于前驱体固有的挑战，即其柔软的骨架、高度的石墨化、灰分含量和减少的孔隙率。本研究利用实验设计的方法，探讨了提高气相色谱再生活性炭（AC）的孔隙率和吸附性能，同时最大化收率的方法。面向产量的孔隙度优化显示，温和的H2O活化（≥750°C，小于或等于20分钟）是最有效的，其次是817°C和16.2分钟的CO2活化。具有最高总体孔隙度的AC是通过顺序活化产生的，利用从H2O活化获得的高表面积（812 m2/g）和从CO2活化获得的高微孔分数（49.3 vol%）。在微污染物吸附试验中，该AC（对美托洛尔的最大吸附量qmax: 89.9mg/g）部分优于商用AC （89.1mg/g）。我们发现，与以前使用的前体相比，GC用于AC生产代表了一个根本不同的起点，这可以通过显著降低激活时间和温度来证明。这项研究为GC高效转化为高价值AC提供了有价值的见解，这是工业应用的重要途径。

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引用次数: 0

Outside Back Cover 外封底

IF 6.4 3区环境科学与生态学 Q2 ENERGY & FUELS

Carbon Resources Conversion

Pub Date : 2025-03-01 DOI: 10.1016/S2588-9133(25)00023-7

引用次数: 0

Thank you reviewers! 谢谢审稿人！

IF 6.4 3区环境科学与生态学 Q2 ENERGY & FUELS

Carbon Resources Conversion

Pub Date : 2025-03-01 DOI: 10.1016/j.crcon.2025.100314

引用次数: 0

Synergistic effects of trace metals on hydrogen and methane production from palm oil mill effluent using two-stage anaerobic digestion 微量金属对两级厌氧消化棕榈油厂废水产氢和甲烷的协同效应

IF 6.4 3区环境科学与生态学 Q2 ENERGY & FUELS

Carbon Resources Conversion

Pub Date : 2025-02-13 DOI: 10.1016/j.crcon.2025.100309

Wisarut Tukanghan , Jiravut Seengenyoung , Supattra In-chan , Chonticha Mamimin , Sukonlarat Chanthong , Sompong O-Thong

The two-stage anaerobic digestion of palm oil mill effluent (POME) was optimized through trace metal supplementation (Mo²⁺, Ni²⁺, Co²⁺, and Fe²⁺). Optimal concentrations were determined as 10 mg·L⁻¹ Mo²⁺, 6 mg·L⁻¹ Ni²⁺, 6 mg·L⁻¹ Co²⁺, and 10 mg·L⁻¹ Fe²⁺, resulting in significant biogas yield improvements on hydrogen yield increased by 86.4 % (29.5 ± 0.9 to 55.0 ± 2.1 mL-H₂·g⁻¹-VS) and methane yield by 84 % (from 173.8 ± 7.8 to 320.0 ± 8.4 mL-CH₄·g⁻¹-VS). Gas composition improved, with H₂ content increasing from 18.5 % to 32.0 % and CH₄ content from 58.2 % to 72.5 %. Maximum process efficiency was achieved at 4-day HRT for hydrogen production and 20-day HRT for methanogenesis with metal removal 0f 93.5–94.8 %. Statistical analysis revealed strong correlations between metal concentrations and enzyme activities (R² = 0.94, p < 0.001) and enzyme activities with biogas yields (R² = 0.92, p < 0.001). Metabolite profiles showed an 81 % increase in acetic acid (3,800 ± 120 mg·L⁻¹) and a 93 % increase in butyric acid (2,900 ± 95 mg·L⁻¹), while propionic acid decreased by 57 % in H₂ stage. Thermoanaerobacterium thermosaccharolyticum was dominant in the H₂ stage, while Methanobacter sp. and Methanosarcina sp. dominated in the CH₄ stage, with their abundance influenced by specific trace metal supplementation. Process stability was maintained through precise control systems (temperature stability index of 0.95 ± 0.05 and pH stability index of 0.92 ± 0.05) with rapid response times (<5 min). COD removal efficiency increased from 65.3 % to 85.2 %, while metal removal efficiencies exceeded 90 % for all supplemented metals. These findings demonstrate significant enhancement in biogas production through optimized trace metal supplementation and precise process control strategies.

通过添加微量金属（Mo2+、Ni2+、Co2+和Fe2+），优化了棕榈油厂废水的两级厌氧消化（POME）。最佳浓度为10 mg·L−1 Mo2+、6 mg·L−1 Ni2+、6 mg·L−1 Co2+和10 mg·L−1 Fe2+，可显著提高沼气产率，氢气产率提高86.4%(29.5±0.9 ~ 55.0±2.1 mL-H2·g−1 vs)，甲烷产率提高84%（173.8±7.8 ~ 320.0±8.4 mL-CH4·g−1 vs）。气体成分得到改善，H2含量从18.5%增加到32.0%，CH4含量从58.2%增加到72.5%。在4天的HRT制氢和20天的HRT产甲烷时，工艺效率最高，金属去除率为93.5 - 94.8%。统计分析表明，金属浓度与酶活性之间存在较强的相关性(R2 = 0.94, p <；0.001)和酶活性与沼气产量的关系(R2 = 0.92, p <；0.001)。代谢物谱显示，H2期乙酸增加81%(3800±120 mg·L−1)，丁酸增加93%(2900±95 mg·L−1)，丙酸减少57%。H2阶段以热厌氧菌为主，CH4阶段以甲烷杆菌（Methanobacter sp.）和甲烷菌（Methanosarcina sp.）为主，其丰度受添加微量金属的影响。通过精确的控制系统（温度稳定指数为0.95±0.05，pH稳定指数为0.92±0.05），快速响应时间（<5 min），保持过程稳定性。COD去除率由65.3%提高到85.2%，金属去除率均超过90%。这些发现表明，通过优化微量金属补充和精确的过程控制策略，可以显著提高沼气产量。

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引用次数: 0