Article
Agricultural Engineering
Ye Yuan, Lulu Zhang, Tianming Chen, Yutong Huang, Xucui Qian, Juan He, Zhaoxia Li, Cheng Ding, Aijie Wang
Summary: The study developed a microbial electrolysis cell coupled with two-phase anaerobic digestion for simultaneous recovery of bio-sulfur and bio-methane from sulfate-rich wastewater. The method efficiently converted sulfides into bio-sulfur in the acidogenic phase and enhanced methanogenesis in the methanogenic phase. The optimization of microbial communities enriched functional consortia capable of sulfides oxidation, hydrogenotrophic methanogenesis, and acetotrophic methanogenesis, leading to a higher bio-methane yield.
BIORESOURCE TECHNOLOGY
(2022)
Article
Engineering, Environmental
Shuang Qiu, Wenhao Xia, Jiajie Xu, Zimu Li, Shijian Ge
Summary: Production of medium-chain carboxylic acids (MCCAs) through chain elongation (CE) offers a competitive alternative to conventional methane products in anaerobic digestion of organic waste. This study investigated the effects of 2-bromoethanesulfonic sodium (BES) on methanogenesis in granular sludge and found that 3.0 g/L BES significantly reduced methane production by suppressing metabolic pathways and intracellular regulations. BES inhibited electron transport and affected energy metabolism, leading to decreased ATP synthesis and enhanced ATP consumption. Additionally, BES favored hydrogenotrophic methanogenesis over acetoclastic one and reduced the protein and carbohydrate contents in extracellular polymeric substances (EPS).
Article
Environmental Sciences
Shuang Qiu, Xingchen Zhang, Wenhao Xia, Zimu Li, Lingfeng Wang, Zhipeng Chen, Shijian Ge
Summary: The study comprehensively explored the responses of methanogenesis in granular sludge at various pH levels, revealing that extreme pH conditions inhibited methanogenesis by suppressing metabolic pathways, affecting microbial abundance and activity, and reducing enzyme activity and electron transport. The study also found that pH stress regulated energy metabolism and had varying effects on the secretion of proteins and carbohydrates in the extracellular polymeric substances (EPS). This research provides insights into the mechanisms behind pH control-induced methanogenesis inhibition in the chain elongation fermentation system.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Environmental
Mingwei Wang, Tengfei Ren, Mengxi Yin, Kechao Lu, Hui Xu, Xia Huang, Xiaoyuan Zhang
Summary: In this study, a binary electroactive material with pseudocapacitance/conductance was designed to store-release electrons and enhance direct electron transfer between acid-producing bacteria and methanogens in anaerobic wastewater treatment. The pseudocapacitance of the material promoted ATP synthesis and provided energy for organic decomposition, while the conductance facilitated direct interspecies electron transfer and improved methane production. The material also helped buffer excess electrons and alleviate pH drop. These findings provide a strategy to enhance electron transfer in anaerobic treatment and guide the design of electroactive materials.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Environmental Sciences
Jiao Sun, Zuotao Zhang, Hui Wang, Matthew J. Rogers, Haijiao Guo, Jianzhong He
Summary: The study demonstrated the effective anaerobic degradation of PAHs using the anaerobic co-culture DYM1 obtained from petroleum-polluted soil without the need for additional terminal electron acceptors. This provides a novel approach for recovering energy from toxic pollutants in the form of methane.
ENVIRONMENTAL POLLUTION
(2022)
Article
Engineering, Environmental
Xiaoguang Liu, Jinchen Chen, Ding-Hsiang Lin, Spyros G. Pavlostathis
Summary: This study assessed the long-term effect of peracetic acid (PAA) solution on the anaerobic treatment of poultry processing wastewater. Results showed that direct addition of PAA solution completely inhibited biogas production and required a relatively long incubation time for recovery.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Environmental Sciences
Pengsong Li, Qian Chen, He Dong, Jialin Lu, Dezhi Sun, Yue Wei, Hao He, Ruting Tang, Yumeng Li, Yan Dang
Summary: Applying external potentials to high salinity organic wastewater negatively affects anaerobic treatment, leading to decreased performance and should be considered in real projects.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Environmental
Xiuhong Liu, Shiyong Zhang, Rong Cheng, Runyu Liu, Zhibin Liu, Qing Yang
Summary: This study investigated the effects of nanoscale zero-valent iron (nZVI) and nano ferroferric oxide (Fe3O4 NPs) on an anaerobic biofilm system for treating domestic wastewater at ambient temperature. The results showed that these nanomaterials not only promoted the removal of organic matter, but also improved methanogenesis efficiency.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Agricultural Engineering
Anissa Sukma Safitri, Krista Michelle Kaster, Roald Kommedal
Summary: This study investigated the production of biogas and removal of municipal wastewater COD at low temperatures using granulated anaerobic biomass. The results showed that stable COD removal and methane production could be achieved at higher temperatures, and temperature did not significantly affect the methane production rate and yield. COD removal and methane yields decreased at lower temperatures, but significant methane formation was still observed.
BIORESOURCE TECHNOLOGY
(2022)
Review
Nanoscience & Nanotechnology
Yongrong Shen, Pingping Sun, Liang Ye, Dong Xu
Summary: This review discusses the research progress and challenges of Anaerobic Membrane Bioreactor (AnMBR) in municipal wastewater treatment, including technical characteristics, membrane fouling, and low-temperature operation. The paper provides solutions and prospects for the development of AnMBR in treating low-concentration municipal sewage and realizing resource and energy reuse.
SCIENCE OF ADVANCED MATERIALS
(2023)
Review
Biotechnology & Applied Microbiology
Jose Antonio Magdalena, Largus T. Angenent, Joseph G. Usack
Summary: Many practitioners believe that oxygen is detrimental to anaerobic fermentation processes, but intentional oxygen sparging can effectively remove H2S in anaerobic digestion systems. Additionally, microaeration techniques have shown that small doses of oxygen can enhance process performance and promote the degradation of recalcitrant compounds. However, existing oxygen dosing techniques are imprecise, highlighting the need for robust monitoring and process control.
FERMENTATION-BASEL
(2022)
Article
Agricultural Engineering
Chunxing Li, Ruming Wang, Xiaoyong Yang, Mingdian Zhou, Xiaofang Pan, Guanjing Cai, Yifeng Zhang, Gefu Zhu
Summary: The study successfully operated methanogenic fermentation under acidic conditions to treat wastewater containing oxytetracycline. Addition of oxytetracycline had little impact on methane generation but significantly influenced the microbial communities. Methanosaeta showed the highest tolerance to oxytetracycline under acidic conditions.
BIORESOURCE TECHNOLOGY
(2021)
Article
Environmental Sciences
Filip Brodowski, Mateusz Lezyk, Natalia Gutowska, Piotr Oleskowicz-Popiel
Summary: The study demonstrated the positive impact of external acetate on lactate-based chain elongation, leading to stable and efficient caproate production with concurrent hydrogen production. The addition of external acetate also helped maintain stable caproate production and induced previously unobserved hydrogen production even under continuous lactate overloading.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Energy & Fuels
Wasi Ur Rahman, Mohammad Danish Khan, Benazir Khurshid, Mohammad Zain Khan, Gopinath Halder
Summary: Increasing population has led to water and energy crises, requiring the treatment of wastewater for human use. This study focuses on degrading wastewater with hazardous toluene and simultaneously recovering energy through anaerobic digestion. The optimal degradation efficiency was achieved when 200 mg/L toluene was degraded with 1 g/L of glucose.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
Article
Environmental Sciences
Chenxi Xu, Yongyu Ding, Jiacheng Liu, Wenwen Huang, Qunpeng Cheng, Guozhi Fan, Juntao Yan, Shunxi Zhang, Guangsen Song, Bo Xiao
Summary: This paper investigates the influences of biochar on the anaerobic digestion of sulphate wastewater. It is found that sulphate can promote anaerobic digestion, but high SO42-/COD ratio inhibits the activity of MPB, resulting in decreased COD removal rate and methane yield. In the presence of biochar, methanogenic microorganisms are selectively enriched, while the growth of SRB is inhibited.
ENVIRONMENTAL TECHNOLOGY
(2023)
Article
Agricultural Engineering
Samarpita Roy, Opeyemi Olokede, Haoran Wu, Mark Holtzapple
Summary: By utilizing methane-arrested mixed cultures, organic substrates were fermented to mixed carboxylic acids at higher yields, and the product rate was increased through the use of ion-exchange resins and other methods. The results suggest that further improvements in the MixAlco (R) process configurations have great potential.
BIOMASS & BIOENERGY
(2021)
Article
Engineering, Chemical
Haoran Wu, Lauren Valentino, Sean Riggio, Mark Holtzapple, Meltem Urgun-Demirtas
Summary: The lack of efficient separation methods is a major obstacle in implementing bio-based fuels and chemicals on a large scale. This study investigated the purification of acetic acid produced from biomass conversion using ion-exchange resins and pressure-driven membranes. The findings suggest that the pH of the solution significantly impacts adsorption capacity and membrane performance.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Review
Agricultural Engineering
Mark T. Holtzapple, Haoran Wu, Paul J. Weimer, Rachel Dalke, Cesar B. Granda, Jesse Mai, Meltem Urgun-Demirtas
Summary: The carboxylate platform utilizes a diverse microbial consortium to digest biomass and produce high yields of products without sterilization, accepting a wide range of feedstocks. It is highlighted for its thermodynamic basis, inoculum source and operating conditions, and downstream chemical processes for converting carboxylates to fuels and chemicals, establishing it as a viable and economical route for industrial biomass utilization.
BIORESOURCE TECHNOLOGY
(2022)
Article
Green & Sustainable Science & Technology
Rachel Dalke, Delaney Demro, Yusra Khalid, Haoran Wu, Meltem Urgun-Demirtas
Summary: This review paper examines the current status and challenges of food waste utilization in the United States, discussing the feasibility of using anaerobic digestion technology. It specifically looks into the composition and availability of FW as a feedstock, as well as the opportunities and barriers in co-digestion processes. Additionally, global trends in food waste digestion and the current status of FW codigestion in the US are presented.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2021)
Article
Biotechnology & Applied Microbiology
Opeyemi Olokede, Haoran Wu, Mark Holtzapple
Summary: Liquid biofuels are crucial alternatives to fossil fuels for addressing climate change, especially in transportation. Prickly pear cladodes, with low lignin content and high sugar content, can be efficiently fermented to produce carboxylic acids without costly pretreatments. This study demonstrates the potential of prickly pear as a promising feedstock for biofuel production.
BIOTECHNOLOGY PROGRESS
(2022)
Article
Engineering, Environmental
Haoran Wu, Thai Scheve, Rachel Dalke, Mark Holtzapple, Meltem Urgun-Demirtas
Summary: In this study, a methane-arrested anaerobic digestion (MAAD) process for converting high-strength cheese whey and brewery wastewater into carboxylic acids was investigated. The process was optimized under various operating conditions and successfully scaled up to pilot-scale production. The study also analyzed the relationship between wastewater characteristics, operation mode, digester scale, and microbial community structure. Moreover, kinetic models were developed and applied for predicting acid production in both bench-scale and pilot-scale MAAD processes.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Green & Sustainable Science & Technology
Haoran Wu, Opeyemi Olokede, Shen-Chun Hsu, Samarpita Roy, Mark Holtzapple
Summary: This study proposes a novel integrated digestion-separation system for enhanced production of carboxylic acids from cellulosic biomass. By applying CO2-sustained anion-exchange resin during digestion, the system achieved higher biomass conversion and acid yield compared to standalone digestion. The system also increased the mass fractions of longer-chain carboxylic acids in the liquid products, demonstrating its effectiveness in recovering carboxylic acids from biomass.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Agricultural Engineering
Yinping Xiang, Meiying Jia, Rui Xu, Jialu Xu, Lele He, Haihao Peng, Weimin Sun, Dongbo Wang, Weiping Xiong, Zhaohui Yang
Summary: This study investigated the impact of the non-antibiotic pharmaceutical carbamazepine on antibiotic resistance genes (ARGs) during anaerobic digestion. The results showed that carbamazepine induced the enrichment of ARGs and increased the abundance of bacteria carrying these genes. It also facilitated microbial aggregation and intercellular communication, leading to an increased frequency of ARGs transmission. Moreover, carbamazepine promoted the acquisition of ARGs by pathogens and elevated their overall abundance.
BIORESOURCE TECHNOLOGY
(2024)
Review
Agricultural Engineering
Weixin Zhao, Tianyi Hu, Hao Ma, Dan Li, Qingliang Zhao, Junqiu Jiang, Liangliang Wei
Summary: This review summarizes the effects and potential mechanisms of biochar on microbial behavior in AD systems. The addition of biochar has been found to promote microbial colonization, alleviate stress, provide nutrients, and enhance enzyme activity. Future research directions include targeted design of biochar, in-depth study of microbial mechanisms, and improved models.
BIORESOURCE TECHNOLOGY
(2024)
Review
Agricultural Engineering
Christina Karmann, Anna Magrova, Pavel Jenicek, Jan Bartacek, Vojtech Kouba
Summary: This review assesses nitrogen removal technologies in reject water treatment, highlighting the differences in environmental impacts and economic benefits. Partial nitritation-anammox shows potential for economic benefits and positive environmental outcomes when operated and controlled properly.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Wei-Hao Huang, Ying-Ju Chang, Duu-Jong Lee
Summary: This study modified pinecone biochar with layered double hydroxide (LDH) to enhance its adsorption capacity for heavy metal and phosphate ions. The LDH-biochar showed significantly improved adsorption capacities for Pb2+ and phosphate, and a slight increase for Cu2+ and Co2+. The LDH layer enhanced the adsorption through various mechanisms.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Chao Song, Fanfan Cai, Shuang Yang, Ligong Wang, Guangqing Liu, Chang Chen
Summary: This paper developed a machine learning model to predict the biochemical methane potential during anaerobic digestion. Model analysis identified lignin content, organic loading, and nitrogen content as key attributes for methane production prediction. For feedstocks with high cellulose content, early methane production is lower but can be improved by prolonging digestion time. Moreover, lignin content exceeding a certain value significantly inhibits methane production.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Sang Min Lee, Ju Young Lee, Ji-Sook Hahn, Seung-Ho Baek
Summary: This study successfully developed an efficient platform strain using Yarrowia lipolytica for the bioconversion of renewable resources into adipic acid, achieving a remarkable increase in production level.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Sefkan Kendir, Matthias Franzreb
Summary: This study presents a novel approach using magnetic separation to efficiently harvest freshwater microalgae, Chlorella vulgaris. By combining pH-induced calcium phosphate precipitation with cheap natural magnetite microparticles, harvesting efficiencies up to 98% were achieved in the model medium.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Ishaq Kariim, Ji-Yeon Park, Wajahat Waheed Kazmi, Hulda Swai, In-Gu Lee, Thomas Kivevele
Summary: The impact of reaction temperature, residence time, and ethanol: acetone on the energy compositions and yield enhancement of biocrudes was investigated. The results showed that under appropriate conditions, biocrudes with high energy and low oxygen content can be obtained, indicating a high potential for utilization.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Xiyue Zhang, Xiyao Li, Liang Zhang, Yongzhen Peng
Summary: Intermittent aeration is an innovative approach to enhance nitrogen removal in low carbon-to-nitrogen ratio municipal sewage, providing an efficient strategy for the continuous plug-flow AOA process.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Xu Yang, Mahmoud Mazarji, Mengtong Li, Aohua Li, Ronghua Li, Zengqiang Zhang, Junting Pan
Summary: This study investigated the impact of magnetite on the nitrogen cycle of pig manure biostabilisation. The addition of magnetite increased N2O emissions and decreased NH3 emissions during composting. It also increased the total nitrogen content but should be considered for its significant increase in N2O emissions in engineering practice.
BIORESOURCE TECHNOLOGY
(2024)
Review
Agricultural Engineering
Ty Shitanaka, Haylee Fujioka, Muzammil Khan, Manpreet Kaur, Zhi-Yan Du, Samir Kumar Khanal
Summary: The market value of microalgae has exponentially increased in the past two decades, thanks to their applications in various industries. However, the supply of high-value microalgal bioproducts is limited due to several factors, and strategies are being explored to overcome these limitations and improve microalgae production, thus increasing the availability of algal-derived bioproducts in the market.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Martin Kerner, Thorsten Wolff, Torsten Brinkmann
Summary: The efficiency of using enriched CO2 from flue gas for large-scale production of green microalgae has been studied. The results show that the use of membrane devices and static mixers can effectively improve the CO2 recovery rate and maintain the suitable pH and temperature during cultivation, achieving a more economical and sustainable microalgae production.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Rui Ma, Ji Li, Rd Tyagi, Xiaolei Zhang
Summary: This review summarizes the microorganisms capable of using CO2 and CH4 to produce PHAs, illustrating the production process, factors influencing it, and discussing optimization techniques. It identifies the challenges and future prospects for developing economically viable PHAs production using GHGs as a carbon source.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Bing Wang, Peng Zhang, Xu Guo, Xu Bao, Junjie Tian, Guomin Li, Jian Zhang
Summary: The addition of zeolite in the co-composting of chicken manure and straw significantly reduced the emissions of ammonia and N2O, and increased the nitrate content. Zeolite also promoted the abundance of nitrification genes and inhibited the expression of denitrification genes.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Rohit Dey, Franziska Ortiz Tena, Song Wang, Josef Martin Messmann, Christian Steinweg, Claudia Thomsen, Clemens Posten, Stefan Leu, Matthias S. Ullrich, Laurenz Thomsen
Summary: This study investigated the operation of a 1000L microalgae-based membrane photobioreactor system for continuous secondary wastewater treatment. The research focused on a green microalgae strain called Desmodesmus sp. The study aimed to understand key trends and optimization strategies by conducting experiments in both summer and winter seasons. The findings showed that maintaining low cell concentrations during periods of light inhibition was beneficial for nutrient uptake rates. Effective strategies for enhancing algae-based wastewater treatment included cell mass recycling and adjusting dilution rates based on light availability.
BIORESOURCE TECHNOLOGY
(2024)
