Article
Environmental Sciences
Wei Liu, Yifan Chu, Qiyang Tan, Jinmei Chen, Lingli Yang, Lin Ma, Yi Zhang, Zhenbin Wu, Feng He
Summary: This study evaluated the purification performance of different anodes in electrolysis-assisted horizontal subsurface-flow constructed wetlands (E-HSCWs) during cold seasons. The results showed that E-HSCWs at a proper COD/TN ratio of 8 have the potential for efficient nitrate removal.
Article
Environmental Sciences
Supriya Gupta, Ankita Nayak, Chandrima Roy, Asheesh Kumar Yadav
Summary: This study reports on a three-stage design of algal assisted constructed wetland-microbial fuel cell incorporated sand filter for efficient treatment of wastewater and bioelectricity generation. The system achieved high removal efficiencies for organic matter and inorganic pollutants such as NH4+, PO43-, and NO3-.
Article
Agricultural Engineering
Mengni Tao, Yu Kong, Zhaoqian Jing, Qiusheng Jia, Zhengkai Tao, Yu-You Li
Summary: The microbial fuel cell-constructed wetland (MFC-CW) is effective for nitrogen removal in carbon constraint wastewater treatment. Wetland plants contribute to denitrification, and the bioenergy output is linearly related to influent COD. Key functional genera play a crucial role in nitrogen removal.
BIORESOURCE TECHNOLOGY
(2022)
Article
Environmental Sciences
Pratiksha Srivastava, Rouzbeh Abbassi, Asheesh Yadav, Vikram Garaniya, Mohsen Asadnia, Trevor Lewis, Stuart J. Khan
Summary: The study evaluated a two-stage hybrid Constructed Wetland integrated with a microbial fuel cell and microbial electrolysis cell for treating complex synthetic municipal wastewater. Applying a constant potential to the working electrode in the system resulted in high treatment performance and reduced sludge generation. The system showed higher removal efficiencies for COD, ammonium, phosphate, and trace metals compared to traditional Constructed Wetland systems.
Article
Environmental Sciences
Yashun Liu, Li Feng, Yongze Liu, Liqiu Zhang
Summary: In recent years, the combination of iron carbon micro-electrolysis (ICME) with constructed wetlands (CWs) for removal of nitrogen and phosphorus has attracted more and more attention. This study established a Fe-C based CW (CW-A) to improve the removal efficiencies of nitrogen and phosphorus and explored the corresponding mechanisms. Results showed that CW-A achieved high removal rates of nitrogen and phosphorus, with wetland plants and intermittent aeration playing dominant roles in the removal of NH4+-N, and Fe-C substrates, wetland plants, and HRT influencing the removal efficiencies of NO3--N, TN, and TP.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Green & Sustainable Science & Technology
Mengni Tao, Zhaoqian Jing, Zhengkai Tao, Hui Luo, Simin Zuo, Yu-You Li
Summary: The addition of corncobs in treating secondary effluent from municipal wastewater treatment plants significantly enhances the denitrification performance and bioelectricity generation in a microbial fuel cell-constructed wetland system. The optimal dosage of corncobs is found to be 70 g/m(2), resulting in the highest nitrate removal and power density. High-throughput sequencing analysis reveals the presence of microorganisms related to organics degradation, and certain functional genera contribute to higher nitrogen removal and bioelectricity generation in the MFC-CW system.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Environmental Sciences
Wanting Hua, Wenqian Hu, Qi Chen, Chunzhen Fan, Shunfeng Jiang, Min Zhao, Zhiquan Wang, Xiangyong Zheng, Suqing Wu, Qingyi Zeng, Chunjie Zhong
Summary: The optimum conditions for preparing Fe-C-CF were determined and it was found that the SFCW system with Fe-C-CF had higher nitrogen removal efficiency and lower CO2 emissions compared to the control system. Microbial community analysis revealed that the addition of Fe-C-CF increased the diversity and abundance of microbial communities in the SFCW systems.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Agricultural Engineering
Yifan Chu, Wei Liu, Qiyang Tan, Lingli Yang, Jinmei Chen, Lin Ma, Yi Zhang, Zhenbin Wu, Feng He
Summary: In this study, eight sets of VFCWs were designed to treat low C/N ratio wastewater, and the addition of pyrite significantly improved the denitrification efficiency. Microbial analysis revealed changes in microbial community structure and diversity, as well as enhanced growth of autotrophic and heterotrophic bacteria, contributing to improved denitrification capacity.
BIORESOURCE TECHNOLOGY
(2022)
Article
Engineering, Environmental
Jiajun Wu, Jingjing Zheng, Ke Ma, Chao Jiang, Liang Zhu, Xiangyang Xu
Summary: This study constructed three bench-scale integrated flow constructed wetlands (IFCWs) to investigate the tertiary treatment of municipal wastewater with different filler medium arrangements. The incorporation of biochar and zero-valent iron (ZVI) significantly enhanced nutrient removal efficiency. Analysis of microbial community and functional genes revealed the enrichment of nitrifiers in biochar-treated IFCW and denitrifiers in ZVI-biochar-treated IFCW. Principal component analysis (PCA) indicated that biochar mainly enhanced microbial nitrification, while ZVI improved denitrification and anammox.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Agricultural Engineering
Mengni Tao, Yu Kong, Zhaoqian Jing, Lin Guan, Qiusheng Jia, Yiwei Shen, Meijia Hu, Yu -You Li
Summary: Acorus calamus is recycled as an additional carbon source in microbial fuel cell-constructed wetlands for efficient nitrogen removal of low carbon wastewater. Alkali-pretreatment cleaves the benzene rings in dominant released organics, producing chemical oxygen demand of 164.5 mg per gram of A. calamus. Adding pretreated biomass in the anode of MFC-CW achieves maximum total nitrogen removal of 97.6% and power generation of 12.5 mW/m2.
BIORESOURCE TECHNOLOGY
(2023)
Article
Environmental Sciences
Xing Fan, Jiao Li, Lei He, Yingmu Wang, Jiong Zhou, Jian Zhou, Caihong Liu
Summary: This study constructed an electrolysis assisted constructed wetland (E-CW) using coconut fiber and solid carbon sources to treat wastewater treatment plant (WWTP) effluent. The E-CW showed significantly higher removal efficiency of total nitrogen (TN) and total phosphorus (TP) compared to the traditional constructed wetland (CW) without electrolysis. The current intensity also had a significant effect on nitrogen removal efficiency and the release of carbon sources from coconut fiber. The study identified the main functional nitrogen-removing and lignocellulose degradation microbes in the E-CW system, providing a new perspective for advanced nutrients removal of WWTP effluent in constructed wetlands.
Article
Engineering, Environmental
Ming Ye, Wenbin Pan, Wenxin Dai
Summary: Eutrophication is a global environmental issue that impairs water quality, threatens drinking water safety, and hinders regional economic development. This study proposes an effective technical program, utilizing a composite iron-carbon constructed wetland combined with a photocatalytic film, to restore eutrophic water. The experimental results show significant improvement in water quality after treatment, with a large number of microalgae on the wetland exerting a reoxygenation effect and enhancing the self-purification capacity of the water body. Enhancing the hydraulic performance of constructed wetlands and the activity of photocatalytic films can improve the remediation of eutrophic water bodies.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Engineering, Environmental
Xiangzheng Li, Lulu Zhou, Lin-Lan Zhuang, Jian Zhang, Mengting Li, Yanan Yang
Summary: In this study, partially unsaturated constructed wetlands (CWs) filled with biochar (C) and/or iron shavings (Fe) were proposed to improve the efficiency of ammonia oxidation and denitrification. The results showed that the addition of Fe-C combination significantly enhanced the removal of total nitrogen and total phosphorus compared to traditional CWs, while reducing the toxicity to plants.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Environmental Sciences
Shuiping Cheng, Jing Huai, Fei Zhong, Juan Wu, Shaole Yu
Summary: The study found that adding algae to constructed wetlands can strengthen the anoxic environment, increase volatile fatty acid concentrations, and improve the ratios of various nitrite reductase and nitrate reductase genes, thus expanding the active space for denitrification. Therefore, algae addition could potentially enhance denitrification in wastewater treatment with low COD/N ratios.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Ecology
Hafiz Ihsan. U. H. Khan, Otto Schepers, Nicolaas van Belzen, Mireille Martens, Cornelis. K. Groot, Dion. van Oirschot, Frederik Ronsse, Diederik. P. L. Rousseau
Summary: This study successfully enhanced nitrate removal efficiency by adding a carbon source in an aerated horizontal subsurface flow constructed wetland. However, the efficiency of COD removal decreased with higher carbon dosing.
ECOLOGICAL ENGINEERING
(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)