Review
Environmental Sciences
Saurabh Mishra, Virender Singh, Banu Ormeci, Abid Hussain, Liu Cheng, Kaushik Venkiteshwaran
Summary: Hybrid anaerobic-aerobic biological systems are an environmentally sustainable method for recovering bioenergy from high-strength wastewaters and landfill leachate. This study critically reviews three major categories of anaerobic-aerobic processes used for wastewater and leachate treatment. It provides a comparative assessment of treatment mechanisms, operating parameters, configurations, control strategies, efficiencies, and microbial dynamics of anaerobic-aerobic systems. The review also explores the influence of wastewater composition, ammonium nitrogen removal, energy consumption, coupled bioenergy production, and economic aspects of anaerobic-aerobic systems, and discusses operational challenges, prospective modifications, and future research directions.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Environmental Sciences
Taotao Tang, Min Liu, Ye Du, Ying Chen
Summary: The study investigated the mechanism by which antibiotics in swine wastewater affect anaerobic digestion. Both single and mixed antibiotics at actual concentrations of 0.5-2 mg/L stimulated methane production. The most significant stimulatory effect on methane production was observed with low-dose antibiotics (0.5 mg/L), increasing by 211.63% (single) and 60.93% (mixed). However, higher doses of antibiotics decreased the stimulatory effect. Single antibiotics were found to be more beneficial for methane production than mixed antibiotics due to their promotion of propionic and butyric acid conversion, while mixed antibiotics inhibited this process. Microbial community analysis indicated that both single and mixed antibiotics caused changes in functional acidogens, leading to alterations in methanogenic pathways.
ENVIRONMENTAL RESEARCH
(2023)
Review
Environmental Sciences
Luong N. Nguyen, Jeevan Kumar, Minh T. Vu, Johir A. H. Mohammed, Nirenkumar Pathak, Audrey S. Commault, Donna Sutherland, Jakub Zdarta, Vinay Kumar Tyagi, Long D. Nghiem
Summary: Anaerobic co-digestion (AcoD) and biogas upgrade have enabled many wastewater treatment plants to become net energy producers. While water scrubbing is currently the most widely used technology, significant market growth in membrane separation has been observed, with further advancements in materials engineering and sciences expected to enhance membrane separation competitiveness in biogas upgrading.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Review
Environmental Sciences
Xinzheng Zhang, Yuqin Fan, Tianwei Hao, Rong Chen, Tao Zhang, Yong Hu, Dapeng Li, Yang Pan, Yu-You Li, Zhe Kong
Summary: This article summarizes the importance and advantages of anaerobic digestion (AD) processes in the treatment of industrial organic wastewater, and introduces some advanced AD processes. AD processes are optimized through enhancement strategies to improve wastewater treatment and energy recovery. The combination of anaerobic ammonia oxidation (Anammox) with AD processes is introduced as a feasible solution for carbon-neutral wastewater treatment. In addition, the integration of AD processes with other bio-processes is proposed for low-carbon treatment in the future.
ENVIRONMENTAL RESEARCH
(2024)
Review
Engineering, Environmental
Mei Chen, Yanli Li, Xinyi Sun, Ruobin Dai, Junjian Zheng, Xin Wang, Zhiwei Wang
Summary: In response to the water shortage and energy crisis, the integration of electrochemical processes into anerobic membrane bioreactor (AnMBR) systems, known as electro-AnMBRs, has gained attention for wastewater treatment and bioenergy recovery. This review systematically summarizes recent advances in electro-AnMBRs, providing valuable information and recommendations for scalable applications. It discusses the configuration and electrode materials of electro-AnMBRs, compares performance with and without electrostimulation in terms of pollutants removal, membrane fouling mitigation, and energy recovery, and highlights the potential and challenges of electro-AnMBRs for wastewater treatment and energy recovery.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Maryam Amouamouha, Gagik Badalians Gholikandi, Travis W. Walker
Summary: The AMBER system, a hybrid system with electrolytic regeneration, improves the filtration behavior of a membrane bioreactor and enhances pollutant removal efficiency. Through experiments, AMBER shows significant effects on increasing permeate flux and reducing extracellular polymeric substances deposition.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Chemistry, Physical
Emmanuel Kweinor Tetteh, Sudesh Rathilal
Summary: This study presents a method of bio-photocatalytic upgrading of biogas using CO2, which involves the use of magnetite photocatalyst and a photomagnetic system for wastewater decontamination. The results show that using a UV-Vis photomagnetic system as a post-treatment is effective in reducing color, COD, and turbidity. By adjusting the organic loading rate and hydraulic retention time, the organic content can be degraded and bioenergy production can be maximized, with potential for environmental conservation.
Article
Environmental Sciences
Chengfan Jiao, Yisong Hu, Xiaoling Zhang, Ruosong Jing, Ting Zeng, Rong Chen, Yu-You Li
Summary: The up-concentration of municipal wastewater using physico-chemical methods can effectively enrich organic matter and enhance methanogenesis, resulting in reduced energy consumption. A study on an anaerobic dynamic membrane bioreactor (AnDMBR) treating up-concentrated municipal wastewater revealed stable COD removal, reduced greenhouse gas emissions, and good resistance to membrane fouling.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Green & Sustainable Science & Technology
Jiayuan Ji, Runda Du, Jialing Ni, Yujie Chen, Yisong Hu, Yu Qin, Toshimasa Hojo, Yu -You Li
Summary: The anaerobic membrane bioreactor (AnMBR) has the potential to be a low-cost and energy-producing wastewater treatment process. This study evaluated a constant low-temperature (15 C) AnMBR for the treatment of real municipal wastewater, and demonstrated that it can achieve high removal efficiency and energy production under optimal operational conditions.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Green & Sustainable Science & Technology
Surya Pratap Singh, Meena Kumari Sharma, Shatrudhan Pandey, S. M. Mozammil Hasnain, Fahad M. Alqahtani, Faisal M. Alessa
Summary: This study demonstrates a novel and sustainable approach for the onsite treatment of domestic wastewater using an integrated settler-based biofilm reactor (ISBR) with efficient biogas generation. The ISBR provides an optimized environment for the growth of biofilm, facilitating the removal of organic pollutants and pathogens. Moreover, the ISBR enables the recovery of valuable biogas, enhancing the overall utility of the treatment process.
Article
Biotechnology & Applied Microbiology
Neriamara Martins-West, Ana Martin-Ryals, Bryan Maxwell, Lance Schideman
Summary: Anaerobic membrane bioreactors (AnMBR) have limitations in membrane cleaning energy demand and membrane flux. This study presents a novel AnMBR configuration, cloth filter anaerobic membrane bioreactor (CFAnMBR), which uses a commercially available cloth filter technology to improve the membrane flux and reduce the cleaning energy demand. The CFAnMBR demonstrates significant improvement in membrane flux and cleaning energy demand compared to previously reported AnMBR configurations.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2023)
Article
Agricultural Engineering
Huijuan Sun, Xinya Yang, Lei Zhang, Yang Liu
Summary: This study investigated the effect of protein content on calcium phosphate precipitation and methane production in anaerobic digestion. Results showed that the degradation of amino acids led to pH increase and triggered the precipitation of calcium phosphate. Addition of 25% bovine serum albumin to the wastewater created a favorable microbial community, resulting in a methane production rate of 82.7%. The prevalence of Synergistetes and Methanosaeta indicated that methane was mainly produced through acetate utilization.
BIOMASS & BIOENERGY
(2023)
Article
Environmental Sciences
Nagarjuna Kandagatla, Bella Kunnoth, Pilli Sridhar, Vinay Tyagi, P. V. Rao, R. D. Tyagi
Summary: Rice is a primary food staple in many countries due to its nutritional value. However, the increasing rice demand in India has resulted in inadequate treatment of rice mill effluent (RME), causing severe damage to soil and water. This review provides an inclusive examination of various methods for RME treatment and discusses the application of the circular economy concept in this field.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Review
Microbiology
Sameh Samir Ali, Mostafa El-Sheekh, Alessandro Manni, Hector A. Ruiz, Tamer Elsamahy, Jianzhong Sun, Michael Schagerl
Summary: The increasing world population, rapid industrialization, and intensive agriculture have led to environmental impacts such as wastewater discharge and global warming. These problems, coupled with the scarcity of fossil fuel and rising crude oil prices, have caused serious social, environmental, and economic issues. Microalgae strains have the ability to withstand harsh environments and can be used in the treatment of industrial and municipal wastes. The shift towards a low-carbon, integrated biorefinery model that can accommodate multiple waste streams has made microalgae-based wastewater treatment a serious competitor to conventional methods.
MICROBIOLOGICAL RESEARCH
(2022)
Review
Agricultural Engineering
Wei Wang, Jo-Shu Chang, Kuan-Yeow Show, Duu-Jong Lee
Summary: This review focuses on the application of anaerobic treatment for degrading recalcitrant compounds in wastewaters. It summarizes the recalcitrant compounds commonly found in wastewaters and their removal performance under anaerobic conditions. The study also highlights the limitation of using BOD/COD ratio to evaluate the anaerobic degradability of wastewater and calls for the development of a novel indicator to characterize the anaerobic recalcitrance of wastewater.
BIORESOURCE TECHNOLOGY
(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)