Article
Environmental Sciences
Weizhong Huo, Xindi Fu, Menggang Bao, Rong Ye, Yuchao Shao, Yanqing Liu, Jiangtao Bi, Xiong Shi, Wenjing Lu
Summary: A two-phase fermentation method was proposed to enhance MCFAs production from kitchen waste, and the effect of ABR on production was investigated. The study found that the highest yield of caproate and ethanol conversion efficiency were achieved in the medium ABR system.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Environmental
Weizhong Huo, Rong Ye, Yuchao Shao, Hongtao Wang, Wenjing Lu
Summary: This study investigated the impact and mechanism of CO2 on ethanol-driven chain elongation. The findings showed that CO2 acts as the initiator of chain elongation, with lower dosages favoring caproate biosynthesis and higher dosages resulting in increased ethanol oxidation rate. Isotopic experiments indicated CO2 fixation in bacteria involved in the chain elongation process. Analysis of genes revealed the effects of CO2 dosages on microbial community structure, with increased relative abundance of chain elongators. Metagenomic analysis showed an upgrade in key functional genes related to the oxidation pathway and fatty acid biosynthesis pathway. Overall, this research provides insights into CO2’s effect on chain elongation and offers a basis for optimizing the chain elongation system.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Engineering, Environmental
Jun He, Zhijian Shi, Tao Luo, Shicheng Zhang, Yan Liu, Gang Luo
Summary: The study found that 1 g/L phenol had a positive effect on caproate production, while 1.5 g/L phenol inhibited the production of short chain fatty acids and chain elongation processes.
Article
Engineering, Environmental
Jing Li, He Liu, Ping Wu, Peng Ding, Jie Zhang, Chao Zhang, Bo Fu, Min-hua Cui
Summary: This study investigates the enhancement of caproate production from ethanol and acetate in chain elongation enrichments by utilizing AHLs as signal molecules. The results show that adding C8-HSL significantly increases caproate concentration, possibly due to the increase in protein content and total biomass.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Environmental Sciences
Shuanglan Cheng, Zhihong Liu, Cristiano Varrone, Aijuan Zhou, Zhangwei He, Houfen Li, Jiaguang Zhang, Wenzong Liu, Xiuping Yue
Summary: Electro-fermentation (EF) is a promising method to enhance caproate production by controlling the fermentation environment and reducing the dosage of external electron donors (EDs). The presence of ethanol and additional electron donors from the bio-cathode can positively impact stable caproate production. Molecular ecological networks analysis revealed cooperative relationships among key microbiomes, such as the dominant genus Clostridium_sensu_stricto, acetogens, EAB, and fermenters, contributing to the chain elongation process.
ENVIRONMENTAL RESEARCH
(2022)
Article
Biotechnology & Applied Microbiology
Peixian Yang, Xin Li, Ling Leng
Summary: The long-term cultivation of sewage sludge in a chain elongation process was performed with the introduction of brewery wastewater as an ethanol source. The results showed that brewery wastewater promoted ethanol utilization, electron recovery efficiency, and MCC formation due to the introduction of organics and microbes from the wastewater.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2023)
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
Environmental Sciences
Lin Li, Chang Liu, Linji Xu, Huichuan Zhuang, Junguo He, Qiang He, Jie Zhang
Summary: The microbial community structure shift and the effect of H2 level on chain elongation performance were investigated in a long-term acclimation experiment. The study found that traditional anaerobic fermentation consortia could rapidly acclimate the chain elongation microbiome. The dominant bacteria during the operation were Caproiciproducens, Clostridium sensu stricto 12, Rummeliibacillus, and Oscillibacter. Increasing ethanol input led to H2 accumulation in the headspace, which immediately inhibited the oxidation of caproate and butyrate, but had a delayed inhibition effect on chain elongation. The H2 level in the headspace was positively correlated with MCFAs production-related bacteria, but excessive H2 accumulation might suppress MCFAs production in the long term.
Article
Environmental Sciences
Delin Yu, Shuanglan Cheng, Fang Cao, Cristiano Varrone, Zhangwei He, Wenzong Liu, Xiuping Yue, Aijuan Zhou
Summary: This study established a microbial electrolysis cell for the biosynthesis of MCFAs from acetate without the addition of exogenous electron donors. The results showed that caproate and butyrate were the main products produced under different applied voltages. The highest caproate concentration was achieved at 0.8 V, with a stable hydrogen partial pressure. The research also revealed the key microbial species involved in caproate biosynthesis and the main contributors of exogenous electron donors.
ENVIRONMENTAL RESEARCH
(2022)
Article
Biotechnology & Applied Microbiology
Peixian Yang, Ling Leng, Huichuan Zhuang, Po-Heng Lee
Summary: In this study, the effects of casamino acids on caproate bioproduction were evaluated. The addition of casamino acids significantly increased caproate production and shortened the lag phase. It also enriched specific microbial communities and recovered key metabolic pathways for caproate formation.
BIOCHEMICAL ENGINEERING JOURNAL
(2023)
Article
Biotechnology & Applied Microbiology
Jialing Tang, Yunhui Pu, Jin Huang, Shengwang Pan, Xiaochang C. Wang, Yisong Hu, Huu Hao Ngo, Yuyou Li, Abdelfatah Abomohra
Summary: Substrate properties have a significant impact on caproate yield, and this study investigates the effect of lactate-to-acetate (LA/AA) carbon ratio and substrate loading on caproate fermentation. The optimal LA/AA carbon ratio and substrate-to-inoculums (S/I) ratio result in the highest caproate yield and selectivity.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2022)
Article
Agricultural Engineering
Tinh Van Nguyen, Tomeu Viver, Jonah Mortier, Bin Liu, Ilse Smets, Kristel Bernaerts, Karoline Faust, Rob Lavigne, Laurent Poughon, Claude-Gilles Dussap, Dirk Springael
Summary: A thermophilic bacterium, strain MDTJ8, was isolated from an anaerobic digestor and shown to produce n-caproate from carbohydrates at high temperatures. Genomic analysis revealed the presence of genes responsible for chain elongation and energy conservation in MDTJ8, opening up possibilities for thermophilic bioprocesses targeting anaerobic digestion. The ability of MDTJ8 to convert various carbohydrates to n-caproate suggests its potential applications in value-added chemical production.
BIORESOURCE TECHNOLOGY
(2023)
Article
Environmental Sciences
Junguo He, Lin Li, Jie Zhang, Xuewei Wu, Biqing Li, Xia Tang
Summary: Producing MCFAs from simple substrates like ethanol and acetate showed rapid results, while using waste activated sludge (WAS) led to poor performance due to inefficient bacterial hydrolysis. Ethanol presence improved the process to some extent, with electron extraction primarily from ethanol rather than WAS observed in chain elongation microbial consortia.
Article
Engineering, Environmental
Giulio Gazzola, Camilla Maria Braguglia, Simona Crognale, Agata Gallipoli, Giuseppe Mininni, Vincenzo Piemonte, Simona Rossetti, Barbara Tonanzi, Andrea Gianico
Summary: Fermentation of food waste is an effective method to obtain marketable products and this study evaluates the effectiveness of producing caproate by in situ electron donor production. The concentration of caproate and the composition of the microbiome can be affected by adjusting the OLR.
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).
Review
Environmental Sciences
Jia-Yong Lao, Yuefei Ruan, Kenneth M. Y. Leung, Eddy Y. Zeng, Paul K. S. Lam
Summary: This comprehensive review examines the occurrence of organophosphate esters (OPEs) in various environments over the past decade and explores age-specific exposure to OPEs. The results suggest that dietary ingestion is the main exposure pathway, followed by dust ingestion. Exposure in schools/daycare centers and offices contributes significantly to OPE intake in non-adults and adults, respectively. Infants are the most vulnerable group, largely due to breast milk ingestion.
CRITICAL REVIEWS IN ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Environmental
Xian-Zheng Zhu, Long-Fei Wang, Xin-Rong Pan, Feng Zhang, Min-Sheng Huang, Wen-Wei Li, Hou-Qi Liu
Summary: This study investigated the feasibility of using a forward osmosis (FO) dewatering process to selectively separate volatile fatty acids (VFA), ammonium, and phosphate from anaerobic acidogenic fermentation. The results showed that the rejection rate of VFA was less than 20% under acidic conditions, but significantly increased to 90% at neutral pH. The transfer of ammonium was greatly influenced by feed solution pH, while the rejection of phosphate was less sensitive to pH variations. The increase in water flux and membrane orientation also affected the separation of nutrients in the FO process.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Xiang Xiao, Chang-Xing Li, Jie-Ru Peng, Yang-Yang Fan, Wen-Wei Li
Summary: This study reveals the electron transfer mechanism of Shewanella oneidensis MR-1 exoelectrogens, and finds that the contribution of the CymA pathway is positively correlated with EET rate. These findings provide a new perspective for understanding bacteria-environment interactions and may inspire the discovery of new EET proteins and the development of more environmentally-robust biotechnologies.
CHEMICAL ENGINEERING JOURNAL
(2023)
Review
Engineering, Environmental
Zhongjuan Wang, Ye Du, Peng Zhou, Zhaokun Xiong, Chuanshu He, Yang Liu, Heng Zhang, Gang Yao, Bo Lai
Summary: Low Fe(II) generation is the main limitation for Fenton process, and providing electrons is the solution to promote Fe(III) reduction. This study systematically reviewed the strategies for enhancing Fe(III)/Fe(II) cycle based on electron donors, which can be classified into five categories: e-PF, e-EF, e-Re, e-Ox, and e-TC. The principles and mechanisms of each enhanced Fenton process were clarified, and the role of chelate agents and carbon-based materials were discussed. Among them, e-Re showed the best performance in pollutant degradation, making it the most promising approach. The development of reductants for future practical application is necessary.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Junjie You, Junyi Li, Heng Zhang, Mengfan Luo, Bo Xing, Yi Ren, Yang Liu, Zhaokun Xiong, Chuanshu He, Bo Lai
Summary: In this study, a g-C3N4 supported NiCx nanoclusters catalyst (NiCx-CN) was developed and its capability in activating peroxymonosulfate (PMS) was investigated. The mechanism investigation revealed that singlet oxygen (1O2) formed during the catalytic process had limited contribution to BPA elimination. Interestingly, high-valent nickel-oxo species (Ni&+=O) generated after the interaction of NiCx-CN and PMS were identified as the dominant reactive oxygen species (ROS). The prepared NiCx-CN also exhibited excellent resistance to interference from inorganic anions. Three BPA degradation routes were proposed based on the transformation intermediates. This study provides a new approach for the efficient degradation of organic pollutants using heterogeneous Ni-based catalysts through PMS activation via a nonradical mechanism.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Engineering, Environmental
Xian-Zhong Fu, Jie Wu, Jie Li, Jian Ding, Shuo Cui, Xue-Meng Wang, Yun-Jie Wang, Hou-Qi Liu, Xin Deng, Dong-Feng Liu, Wen-Wei Li
Summary: In this study, a pH-regulation strategy was used to enhance bio-FeS synthesis and improve the activity and stability of bio-hybrids for the treatment of high-concentration chromium-containing wastewater. The findings provide new insights into the environmental-responses of bio-hybrid self-assembly process and have important implications for optimized application of bio-hybrids in wastewater treatment and environmental remediation.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Engineering, Environmental
Xianhu Long, Hongle Shi, Rongfu Huang, Lingyun Gu, Yang Liu, Chuan-shu He, Ye Du, Zhaokun Xiong, Wen Liu, Bo Lai
Summary: In this study, sustainable Fe(III)/Fe(II) cycles in different inorganic peroxides activation systems were accelerated by using electro-catalysis (EC) as the electron donor. The electro-cocatalytic Fenton-like systems exhibited excellent degradation efficiency of sulfamethoxazole (SMX). Various reactive oxygen species (ROS) including hydroxyl radical ((OH)-O-center dot), singlet oxygen (O-1(2)), and sulfate radical (SO4 center dot-) were produced in EC/Fe(III)/PMS system, contributing to 38%, 37%, and 24% respectively. The dominant ROS in EC/Fe(III)/ PDS and EC/Fe(III)/HP processes was (OH)-O-center dot. The study provides a strong basis for constructing suitable systems to achieve different treatment requirements.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Agricultural Engineering
Wei-xin Cheng, Ling-ling Wang, Yun Xu, Si-jia Li, Quan Wang, Rong-ping Chen, Lei Yu
Summary: A comparison was made between pre-culture bacteria (PCB) and heat treatment anaerobic granular sludge (HTAGS) for hydrogen production, and it was found that the hydrogen molar yield (HMY) of PCB was 21-35% higher than that of HTAGS. The addition of biochar increased hydrogen production in both cultivation methods by enhancing extracellular electron transfers. Fe3O4 did not promote hydrogen production in PCB experiments but had a positive effect on HTAGS experiments due to the different microbial composition of the two systems. Different pretreatment methods of inoculum resulted in significant changes in the sludge community, thus affecting biohydrogen production.
BIORESOURCE TECHNOLOGY
(2023)
Article
Green & Sustainable Science & Technology
Yuru Liu, Jingyu Zhu, Christopher Padi Tuwor, Chen Ling, Lei Yu, Ke Yin
Summary: We evaluate the response of global supply chains to carbon emissions during the COVID-19 crisis by using MRIO models for import and export shocks in 14 countries/territories. CO2 emissions inventories based on intermediate inputs and final consumption are used to analyze the environmental impacts. The results show a decrease of 6.01% in global carbon emissions during COVID-19, with a significant reduction in imported carbon emissions and the transport sector witnessing an 18.42% carbon emission reduction.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Engineering, Environmental
Han Xi, Lujia Shi, Fan Wang, Jie-Jie Chen, Zhi-Yan Guo, Wen-Qi Xia, Yang Si, Jing-Hang Wu, Houqi Liu, Fei Chen, Wen-Wei Li
Summary: Two-dimensional metal oxide nanomaterials have abundant surface active sites for Fenton-like catalysis, but improving their performance is limited by a lack of knowledge on the material structure-activity relationships. This study explores the different catalytic behaviors of bismuth bromide (BiOBr) nanosheets on their (010) and (001) facets in nonradical Fenton-like oxidation of pollutants. The (010) facet shows stronger binding and electronic interaction with PMS, leading to the generation of singlet oxygen (O-1(2)), resulting in one-order-of-magnitude higher bisphenol A degradation kinetics and a 4-fold enhancement in intrinsic activity compared to the (001) facet.
ACS ES&T ENGINEERING
(2023)
Article
Engineering, Environmental
Zhenyu Wang, Yang Si, Yunjie Wang, Tian Liu, Miao Gao, Wenwei Li
Summary: In recent years, conductive membranes have been extensively studied for their unique antifouling mechanisms and regenerative properties. Current strategies focus on enhancing membrane conductivity, but the resulting antifouling performance enhancement is limited. In this study, a hierarchical-nanostructure membrane CNT-PANI-GQDs was constructed, demonstrating a capacitance-tuning strategy to enhance the membrane's antifouling performance. This work provides valuable references for designing electric antifouling membranes for water purification applications.
ACS ES&T ENGINEERING
(2023)
Article
Environmental Sciences
Cheng Yang, Wen Jie Du, Ru-Li He, Yi-Rong Hu, Houqi Liu, Tianyin Huang, Wen-Wei Li
Summary: This study used machine learning techniques to reveal the patterns of methane and nitrous oxide emissions from China's inland waters. The results showed significant seasonal variations in methane emissions, influenced by total nitrogen and chemical oxygen demand concentrations. Northern watersheds were identified as hotspots of methane emissions, while nitrous oxide had a lower contribution to total carbon emissions with smaller temporal and spatial variations. The research provides valuable insights for counting and controlling greenhouse gas emissions from environmental water bodies.
Article
Environmental Sciences
Ling-ling Wang, Zheng-yan Yin, Yun Xu, Miao-yu Deng, Kai-ming Zhang, Quan Wang, Rong-ping Chen, Lei Yu
Summary: The production and composition of extracellular polymeric substances (EPS) and the related functional resistance genes and metabolic levels of Bacillus sp. under Cu(II) stress were investigated. The study found that EPS production increased by 2.73 times and the polysaccharide (PS) content and PN/PS ratio in EPS increased under Cu(II) stress, enhancing the cells' ability to resist Cu(II) toxicity. Gene ontogeny pathway analysis and Kyoto Encyclopedia of Genes and Genomes pathway analysis revealed differential expression of functional genes involved in EPS regulation and copper resistance, indicating the strain's defense mechanism against Cu(II) stress. These findings provide a basis for the application of EPS-regulated bacteria in heavy metal wastewater treatment.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Yuefei Ruan, Paul K. S. Lam, Jia-Yong Lao, Guangling Huang, Kai Zhang, Qi Wang, Shaopeng Xu, Jiaxue Wu, Kenneth M. Y. Leung, Eddy Y. Zeng, Bensheng Huang
Summary: Due to the lack of monitoring networks and criteria for emerging contaminants in rivers, it is challenging to quantify the influences of human activities on their occurrence and ecological impacts. In this study, organophosphate esters (OPEs) were investigated in the urban estuary of Pearl River Estuary (PRE) in South China. The results showed that OPEs occurrence was mainly influenced by land-based emissions and hydrological conditions. Tributyl phosphate and tris(2-chloroethyl) phosphate were identified as priority OPEs, requiring further monitoring and control measures in this estuary. The study indicates that urbanized riverine outlets are more environmentally stressed and have lower resilience to OPE pollution.
Review
Chemistry, Analytical
Qi Wang, Yuefei Ruan, Calista N. T. Yuen, Huiju Lin, Leo W. Y. Yeung, Kenneth M. Y. Leung, Paul K. S. Lam
Summary: This review summarizes the advantages of three target analysis supplementary approaches for tracking PFASs in the aquatic environment and proposes considering more targets and developing comprehensive sample treatment strategies. It also suggests including PFASs screened via HRMS in mass balance analysis.
TRAC-TRENDS IN ANALYTICAL CHEMISTRY
(2023)
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)