Article
Environmental Sciences
Chuan Shi, Jinyuan Ma, Houkai Wu, Juan Luo, Yue Liu, Kun Li, Yuexi Zhou, Kaijun Wang
Summary: This study investigated and evaluated the roles of different pH levels (acidic, neutral, alkaline) in the anaerobic co-fermentation of sewage sludge and carbohydrate-type municipal waste. The study found that each pH level resulted in the production of different gases (CO2, CH4, H2) and had different effects on the release of ammonia. Microbial analysis showed that pH was a key parameter in determining microbial activity and community transition.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Yahui Zhu, Zhen Jin, Qilin Yu, Zhiqiang Zhao, Yaobin Zhang
Summary: This study combined ethanol-type fermentation pretreatment and biochar addition to alleviate acid accumulation during anaerobic digestion of food waste. The results showed that adding biochar increased methane production and improved the recovery of the digestion process.
ENVIRONMENTAL RESEARCH
(2022)
Article
Agriculture, Dairy & Animal Science
Jung Wook Lee, Shenggang Wang, Teresa Seefeldt, Abigail Donkor, Brian A. Logue, Hee Seong Kim, Jinsu Hong, Tofuko A. Woyengo
Summary: The study investigated the effects of pH reduction on glucosinolate degradation products and fermentation characteristics in porcine in vitro fermentation of canola co-products. The results showed that while SECM-derived glucosinolates were affected by pH reduction, CPCC-derived glucosinolates were less impacted. Factors other than pH may play a role in the degradation of canola-derived glucosinolates by hindgut microorganisms in pigs.
ANIMAL FEED SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Environmental
Farokh Laqa Kakar, Steven N. Liss, Elsayed Elbeshbishy
Summary: This study investigated the impact of high temperature thermochemical pretreatment on volatile fatty acids (VFA) production and methane recovery in wastewater sludge treatment. The results showed that acidic and alkaline conditions during the pretreatment increased sludge solubilization and methane production. Alkaline sludge has shown technical and economic feasibility for sludge carbon recovery.
WATER SCIENCE AND TECHNOLOGY
(2022)
Article
Agricultural Engineering
Wenkai Nie, Yan Lin, Xin Wu, Shaohua Wu, Xiang Li, Jay J. Cheng, Chunping Yang
Summary: In this study, chitosan-Fe3O4 was prepared and its effects on anaerobic digestion processes under acid stress were investigated. The results revealed that chitosan-Fe3O4 significantly increased the methanogenesis rate and accelerated the restoration of acidified anaerobic systems. The analysis of sludge characteristics indicated that chitosan-Fe3O4 promoted the secretion of proteins and humic substances, and enhanced the electron transfer activity of the system. Microbial community analysis showed that chitosan-Fe3O4 enriched the abundance of Peptoclostridium and facilitated direct interspecies electron transfer. These findings suggest that chitosan-Fe3O4 can be used to improve the efficiency of anaerobic digestion of high concentration organic wastewater under acid inhibition conditions.
BIORESOURCE TECHNOLOGY
(2023)
Article
Food Science & Technology
Xiao-tong Lin, Bo-xian Xiao, Jun -ping Liu, Ming-yuan Cao, Zhi-ping Yang, Li-yan Zhao, Gui-tang Chen
Summary: In this study, a polysaccharide UGP1 was isolated from ginger and its properties and structure were determined. It was found to be an acidic heteropolysaccharide with a helix structure composed of six kinds of monosaccharide. UGP1 was also found to be fermented by gut microbiota into short chain fatty acids that may regulate the health of the human body.
Article
Engineering, Environmental
Qing Yu, Yafei Yang, Mingwei Wang, Yahui Zhu, Cheng Sun, Yaobin Zhang, Zhiqiang Zhao
Summary: This study found that magnetite can stimulate the secretion of EPS with higher electron accepting and donating capacity, enriching species capable of extracellular electron transfer, and likely improving anaerobic digestion through direct interspecies electron transfer.
Article
Environmental Sciences
Liu Yue, Shi Chuan, Yuanyuan Wu, Dan Han, Kun Li, Jinyuan Ma, Kaijun Wang
Summary: This study proposed a new ethanol-lactic type fermentation and explored the optimal control strategy. Through batch experiments, it was found that the highest yield of ethanol and lactic acid was achieved at specific pH, temperature, and organic loading conditions. Dynamic pH control was shown to improve fermentation product concentration and acidogenesis rate.
ENVIRONMENTAL TECHNOLOGY
(2022)
Article
Engineering, Environmental
Javier Bravo-Venegas, Ines Prado-Acebo, Beatriz Gullon, Thelmo A. Lu-Chau, Gemma Eibes
Summary: Apple pomace (AP), a lignocellulosic residue, can be used to produce butanol by acetone-butanol-ethanol (ABE) fermentation. The prevention of acid crash occurrence in C. beijerinckii CECT 508 cultures was optimized by adjusting pH, CaCO3 concentration, and culture temperature. The optimal conditions of pH 7, 6.8 g/L CaCO3, and 30 degrees C resulted in a butanol production of 10.75 g/L. Additionally, the comparison between the supernatant of AP hydrolysate and the full hydrolysate indicated the possibility of eliminating the centrifugation step and achieving a zero-waste approach.
Article
Green & Sustainable Science & Technology
Xiaoyu Ma, Juan Wang, Ming Gao, Nuohan Wang, Chenglong Li, Qunhui Wang
Summary: Utilizing Sophora flavescens residues (SFRs) for lactic acid (LA) production through simultaneous saccharification and fermentation (SSF) was found to be effective, with pH adjustment to 8.5 showing higher LA concentration and yield compared to pH 5.5. The study also revealed that ethanol byproduct was mainly produced by ethanol-producing microorganisms rather than Lactobacillus heterofermentation.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Biotechnology & Applied Microbiology
Miguel Capilla, Carlos Silvestre, Alejo Valles, Francisco Javier Alvarez-Hornos, Pau San-Valero, Carmen Gabaldon
Summary: The study showed that pH regulation can influence monosaccharide composition in batch and continuous fermentation processes, impacting butanol production and productivity.
FERMENTATION-BASEL
(2022)
Article
Engineering, Environmental
Angel Mario Lopez-Hidalgo, Gabriela Magana, Felicia Rodriguez, Antonio De Leon-Rodriguez, Arturo Sanchez
Summary: This study investigates the environmental and economic sustainability of a lignocellulose-based biorefinery by co-producing hydrogen and ethanol via dark fermentation using genetically engineered Escherichia coli. Results indicate that co-production schemes could be a viable alternative for lignocellulosic ethanol biorefineries.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Agricultural Engineering
Ming Gao, Min Yang, Xinxin Ma, Dong Xie, Chuanfu Wu, Qunhui Wang
Summary: This study found that adding different proportions of food waste to tylosin fermentation dreg can significantly increase methane production, with pH, total volatile fatty acids, and acetic acid being the most important factors affecting cumulative methane production. Tylosin can be effectively removed through co-digestion, with a total removal rate of 68.2%-83.7%.
BIORESOURCE TECHNOLOGY
(2021)
Article
Energy & Fuels
A. Vijin Prabhu, S. Antony Raja, A. Avinash, Arivalagan Pugazhendhi
Summary: The anaerobic co-digestion of Prosopis julifiora seeds, water hyacinth, dry leaves, and cow manure significantly affects biogas production, with maximum responses achieved under specific operating conditions. The experiment demonstrated a high methane yield, anaerobic biodegradability, and reduction in TS under predicted operating conditions.
Article
Thermodynamics
Zhiqiang Zhao, Yang Li, Yaobin Zhang
Summary: The conversion of organic wastes to ethanol as a pretreatment strategy may enhance anaerobic digestion by promoting direct interspecies electron transfer. Further research is needed to clarify the advantages of this strategy.
Article
Agricultural Engineering
Zisheng Zhao, Yi Cao, Shiyang Li, Yaobin Zhang
Summary: The study demonstrated that biochar pyrolyzed at 600 degrees Celsius with iron dosage can effectively promote the anaerobic digestion of acid orange 7 and improve COD removal efficiency. The presence of more functional groups in 600-1 biochar enhances electron transfer efficiency and enriches exoelectrogens related to syntrophic metabolism. This ultimately benefits electron transfer efficiency and AO7 removal.
BIORESOURCE TECHNOLOGY
(2021)
Article
Environmental Sciences
Ting-ting Zhu, Yao-bin Zhang, Yi-wen Liu, Zi-sheng Zhao
Summary: The study shows that microbial electricity coupled with Fe(III) reduction can enhance anaerobic ammonium removal, possibly through the enrichment of iron-reducing bacteria and the generation of nitrite from the Feammox process. The synergistic effect of BES and Feammox process may improve the reaction process and microorganisms, leading to a more efficient ammonium removal process.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Chemistry, Multidisciplinary
Yang Li, Zhiqiang Zhao, Qilin Yu, Cheng Sun, Mingwei Wang, Yaobin Zhang
Summary: This study proposed a strategy of enhancing ethanol production from anaerobic fermentation of organic wastes by stimulating ATP synthase of ethanol-producing Fe(III)-reducing bacteria with magnetite. The presence of magnetite significantly increased ethanol yield and influenced microbial communities.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Article
Engineering, Environmental
Mingwei Wang, Zhiqiang Zhao, Yaobin Zhang
Summary: A new magnetite-contained biochar was prepared using iron-rich Fenton sludge as raw material, with the transformation of amorphous iron oxides into magnetite at 400 degrees C of pyrolysis and preservation of redox quinone/hydroquinone moieties of biochar. This magnetic biochar exhibited high capacitance and excellent conductivity, leading to significantly enhanced methane production when supplemented into anaerobic digestion system, offering a new approach to recycle hazardous Fenton sludge.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Engineering, Environmental
Weichao Xu, Fei Long, He Zhao, Yaobin Zhang, Dawei Liang, Luguang Wang, Keaton Larson Lesnik, Hongbin Cao, Yuxiu Zhang, Hong Liu
Summary: The study evaluates three machine learning algorithms for predicting the performance of ZVI-based AD reactors and finds XGBoost to have the highest accuracy. Parameters like total solid of feedstock, sCOD, ZVI dosage, and particle size were identified as dominant factors affecting methane production. Deep learning outperformed XGBoost and random forest with the lowest root mean squared errors for predicting cumulative methane production.
Article
Engineering, Environmental
Yafei Yang, Cancan Xiao, Qing Yu, Zhiqiang Zhao, Yaobin Zhang
Summary: The study confirmed the occurrence of a novel 'anammox' process in the absence of anammox bacteria, driven by NO-induced Fe(II) oxidation and NH-induced Fe(III) reduction (Feammox) in an anaerobic sludge system. The results showed that Fe(II) was anaerobically oxidized to Fe(III) with the addition of NO2-, leading to significant nitrogen removal. XRD and XPS analysis indicated the production of FeOOH from chemical Fe(II) oxidation with NO2-. Additionally, the isotope experiment confirmed the participation of induced Fe(II) oxidation in Feammox for nitrogen removal.
Article
Green & Sustainable Science & Technology
Jianfeng Wang, Zhiqiang Zhao, Yaobin Zhang
Summary: This study found that optimizing the pyrolytic temperature of biochar to form more redox-active organic functional groups can improve the anaerobic digestion performance of kitchen wastes.
Article
Engineering, Environmental
Qing Yu, Yafei Yang, Mingwei Wang, Yahui Zhu, Cheng Sun, Yaobin Zhang, Zhiqiang Zhao
Summary: This study found that magnetite can stimulate the secretion of EPS with higher electron accepting and donating capacity, enriching species capable of extracellular electron transfer, and likely improving anaerobic digestion through direct interspecies electron transfer.
Article
Thermodynamics
Zhiqiang Zhao, Yang Li, Yaobin Zhang
Summary: The conversion of organic wastes to ethanol as a pretreatment strategy may enhance anaerobic digestion by promoting direct interspecies electron transfer. Further research is needed to clarify the advantages of this strategy.
Article
Engineering, Environmental
Yafei Yang, Zhiqiang Zhao, Yaobin Zhang
Summary: The Feammox process, which involves Fe(III) reduction coupled to anaerobic ammonium oxidation, plays a key role in the nitrogen cycle in natural environments. However, the application of Feammox in wastewater treatment is limited by the need for continuous Fe(III) supplementation. This study demonstrated that intermittent aeration with air could facilitate the Fe(II)/Fe(III) cycle in the Feammox system for continuous nitrogen removal, providing a potential in situ remediation method for treating high-content NH4+.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Review
Environmental Sciences
Ting-ting Zhu, Zhong-xian Su, Wen-xia Lai, Yao-bin Zhang, Yi-wen Liu
Summary: This review discusses the fate of antibiotics and ARGs in wastewater treatment plants, highlighting the importance of biological treatment technologies and combined processes. It emphasizes that adsorption and biodegradation are the major removal pathways for antibiotics, and suggests further investigation into combined technologies for future application prospects.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Zhen Jin, Zhiqiang Zhao, Lianfu Liang, Yaobin Zhang
Summary: The addition of Fe3O4 into anaerobic reactors treating sulfate-containing wastewater with azo dye AO7 has been shown to enhance system performance, increase the production of degradation intermediates, and enrich iron-reducing bacteria capable of degrading azo dye.
Article
Engineering, Environmental
Yang Li, Chunlei Dong, Yuan Li, Wenqi Nie, Mingwei Wang, Cheng Sun, Lianfu Liang, Zhiqiang Zhao, Yaobin Zhang
Summary: The study found that magnetite promotes the anaerobic degradation of aromatic compounds under low-concentration sulphate conditions, participating in the process of benzoate degradation coupled to sulphate reduction.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Environmental Sciences
Ting-ting Zhu, Wen-xia Lai, Yao-Bin Zhang, Yi-wen Liu
Summary: The Feammox process plays a crucial role in the natural nitrogen cycle, but has been rarely investigated in the field of wastewater treatment. This study explored the potential of anaerobic ammonium removal coupled with organics to assess the Feammox process for conventional wastewater treatment. Results showed that the Fe2O3 group had the highest efficiency in ammonium removal, while organics significantly inhibited the Feammox process.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Yang Li, Ying Ma, Zisheng Zhao, Xin Wen, Guangkuo Xu, Lin Jiang, Lifen Liu, Yaobin Zhang, Zhiqiang Zhao
Summary: A strategy utilizing magnetite and endogenous electron donors for self-dechlorination of 4-CP was proposed and significantly improved the removal efficiency of 4-CP in biotic groups with magnetite. LC-MS and GC analysis revealed the possible metabolic pathway of 4-CP degradation with magnetite, while high-throughput sequencing showed an increase in beneficial bacterial species in magnetite-supplemented biotic groups.
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)