Article
Engineering, Environmental
Ye Sun, Mingwei Wang, Lianfu Liang, Cheng Sun, Xuepeng Wang, Zhenxin Wang, Yaobin Zhang
Summary: This study investigated the effects of adding Fenton sludge to anaerobic digesters. The results showed that continuously feeding Fenton sludge increased methane production and COD removal rate, while maintaining the activity of anaerobic digestion. Additionally, the addition of Fenton sludge enriched iron-reducing bacteria and enhanced electron transfer. These findings suggest that feeding Fenton sludge into anaerobic digesters is a feasible method for treatment and performance enhancement.
Article
Green & Sustainable Science & Technology
Wei Zhan, Yu Tian, Jun Zhang, Wei Zuo, Lipin Li, Yaruo Jin, Yongjia Lei, Ansen Xie, Xiyu Zhang
Summary: This study found that the addition of ferric chloride (FC) can significantly increase methane production in waste-activated sludge (WAS) anaerobic digestion by promoting dissimilatory iron reduction (DIR). However, FC also inhibits methane production from acetoclastic and hydrogenotrophic methanogenesis by competing for electrons and inhibiting the bioconversion to methane. Microbial community analysis showed that FC enriched Fe(III)-reducing genera and bacteria related to hydrolysis and acidification, while decreasing the abundance of methanogens.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Environmental Sciences
Jifei Chang, Nanqi Ren, Qing Yuan, Shu Wang, Danhui Liang, Zexuan He, Xin Wang, Nan Li
Summary: Activated carbon can enhance iron reduction and vivianite formation efficiency by acting as both a storage battery and a dry cell, influencing biogeochemical iron cycle and vivianite recovery.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Environmental
Vikas Kumar, Parmila Devi, Abhishek Patil, Juan Camilo Santana, Jake S. Bobowski, Steven J. Hallam, Cigdem Eskicioglu
Summary: This study investigated the effect of metal-impregnated carbon cloth supplementation on thermophilic anaerobic digestion improvement. Different types of metal impregnated CC nanocomposites were synthesized and their functional significance for enhanced AD was evaluated. The results showed that the efficacy of CC supplementation for AD upgrading largely depends on the higher surface area compared to metal impregnation or conductivity.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Dong Feng, Ao Xia, Qiang Liao, Abdul-Sattar Nizami, Chihe Sun, Yun Huang, Xianqing Zhu, Xun Zhu
Summary: The addition of conductive carbon cloth improved the anaerobic digestion of wastewater rich in VFAs, preventing digestion failure and enhancing methane production by 200-260% with significantly improved COD removal efficiency. The presence of exoelectrogens and electrotrophic methanogens on the carbon cloth promoted direct interspecies electron transfer and methane production.
ENVIRONMENTAL POLLUTION
(2021)
Article
Biotechnology & Applied Microbiology
Yuyin Wang, Guangxue Wu
Summary: Antibiotics like tetracycline in wastewater can lead to operational failure of anaerobic digestion systems, inhibiting COD removal, causing VFAs accumulation, reducing methane production, and impacting microbial communities. CFRs performed better in COD shock loading recovery, propionate degradation, and methane production. Additionally, CFRs exhibited superior tetracycline removal capacity compared to SBRs. Biodegradation was found to be the primary pathway for tetracycline removal, and long-term tetracycline exposure affected archaea abundances and enrichment of hydrolytic-acidogenic bacteria. CFRs provided a more conducive environment for the enrichment of these microorganisms.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2023)
Article
Environmental Sciences
Zexuan He, Jifei Chang, Yujie Feng, Shu Wang, Qing Yuan, Danhui Liang, Jia Liu, Nan Li
Summary: This study investigates the impact of carbon nanotubes (CNTs) on vivianite formation. The results show that the addition of CNTs can increase the production rate of vivianite. However, at the initial stage, CNTs can decrease the efficiency of iron reduction due to the damage to the cell membrane. In addition, the biotoxicity of CNTs stimulates a defense response in dissimilative iron-reducing bacteria (DIRB).
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Green & Sustainable Science & Technology
Vikas Kumar, Brandon Kieft, Parmila Devi, Steven J. Hallam, Cigdem Eskicioglu
Summary: This study investigated the effects of two-step activated carbon cloth on syntrophic microbial associations during anaerobic digestion of municipal sludge. The results showed that activated carbon cloth enhanced methane yield and reduced the lag phase, attributed to its increased electron transfer and methane production kinetics. Additionally, activated carbon cloth promoted the adherence of methane-producing microorganisms, providing a stable environment for syntrophic energy metabolism.
Article
Engineering, Environmental
Mengqi Zheng, Zhiming Wang, Chunhua He, Kai Zhou, Yipeng Yu, Wei Wang
Summary: Low-carbon source wastewater (LCSW) poses a challenge to traditional wastewater treatment techniques in terms of nutrient removal, making it a hidden problem in eutrophic waters. A hybrid biofilm system (HBS) based on corncob and scrap iron was developed to achieve synergistic nitrogen removal and phosphorus recovery in LCSW. The HBS utilized corncob as a sustainable carbon source through hydrolysis and fermentation coupled with dissimilatory iron reduction (DIR) process, resulting in high nitrogen removal and phosphorus recovery through chemical precipitation. Heterotrophic denitrification and microbial activity played crucial roles in the overall process.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Engineering, Environmental
Miao Yan, Changrui Wang, Ying Li, Hailin Tian, Yongming Sun
Summary: Most anaerobic digestion reactors are operated under mesophilic and thermophilic conditions, but an optimized method for psychrotrophic anaerobic digestion (PAD) would have economic and environmental benefits as an alternative. This study investigated the conditions and mechanism to optimize PAD and found that intermittent bioaugmentation with mesophilic propionate-degrading consortia enhanced methane production. Metagenomic analysis revealed a higher cold tolerance of the bacterial community than methanogen community. Coupling reactor performance with microbial metabolic analysis, this study provides comprehensive findings for boosting the PAD process by intermittent bioaugmentation with methanogenic consortia.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Paolo S. Calabro, Filippo Fazzino, Carlo Limonti, Alessio Siciliano
Summary: The study suggests that adding conductive materials such as granular activated carbon (GAC) and aluminum can effectively improve the digestion efficiency of waste-activated sludge (WAS), while the use of steel powder and zero-valent iron is not effective. Under high volatile fatty acids-to-alkalinity ratios, reactors modified with GAC and aluminum show the highest methane yields.
Article
Agricultural Engineering
Yingdi Zhang, Najiaowa Yu, Bing Guo, Abdul Mohammed, Lei Zhang, Yang Liu
Summary: This study investigated the feasibility of municipal sewage treatment in laboratory-scale up-flow anaerobic sludge blankets. The results showed that the conductive-amended treatment was more effective in enhancing reactor performance compared to the non-conductive treatment. The enrichment of functional microbial communities and the positive impacts of biofilm on suspended sludge played key roles in improving biomethane recovery.
BIORESOURCE TECHNOLOGY
(2022)
Article
Environmental Sciences
Felipe Pereira de Albuquerque, Wafa Dastyar, Seyed Mohammad Mirsoleimani Azizi, Basem S. Zakaria, Amit Kumar, Bipro Ranjan Dhar
Summary: The addition of carbon cloth in high-solids anaerobic digestion can enhance biomethane production from organic waste by shortening the lag phase and improving the methanogenesis rate. Microbial community analysis reveals the enrichment of electroactive bacteria and the growth improvement of methanogens.
Article
Engineering, Environmental
Xinrui Xu, Miao Yan, Yongming Sun, Ying Li
Summary: This study successfully acclimatized a cold-tolerant methanogenic consortium and applied it as a bioaugmentation seed to enhance psychrophilic anaerobic digestion (AD). Results showed that bioaugmentation increased methane yield, shortened digestion period, and reduced VFAs contents. The optimal dose for bioaugmentation was determined to be 12%.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Fetra J. Andriamanohiarisoamanana, Ikko Ihara, Gen Yoshida, Kazutaka Umetsu
Summary: In anaerobic digestion of oxytetracycline (OTC)-contaminated dairy manure, ferric hydroxide was found to be the most effective iron oxide to enhance methane yield, while magnetite may help alleviate the inhibition of OTC.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
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)
