Article
Engineering, Environmental
Naveen Chand, Kapil Kumar, Surindra Suthar
Summary: The study demonstrated that intermittent aeration in VFCWs significantly improved the removal efficiency of COD, NH4+-N, NO3-N, and TP compared to non-aerated setups, while setups with biochar (BC) addition and plantation were more advantageous in nutrient removal than those without BC. Moreover, the COD/N ratio of wastewater did not have a significant impact on VFCWs with BC and intermittent aeration, indicating the effectiveness of slow adsorption and fast aerobic degradation processes.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Green & Sustainable Science & Technology
Buthaina Mahfoud Al-Wahaibi, Tahereh Jafary, Abdullah Al-Mamun, Mahad Said Baawain, Mortaza Aghbashlo, Meisam Tabatabaei, Alexandros I. Stefanakis
Summary: A full-scale Vertical Flow Constructed Wetland (VFCW) project was implemented in Oman to provide a sustainable wastewater treatment solution. The study showed high removal rates for pollutants, but nitrogen removal still faced challenges, prompting the testing of various operational modifications to optimize treatment performance.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Engineering, Environmental
Xinwen Zhang, Chengye Feng, Zhenghe Xu, Wenhao Yang, Kai Tong, Yubin Wang, Xinlin Liu
Summary: A novel aerated vertical flow constructed wetland (VFCW) using waste gas from PN process was designed to enhance nitrogen removal and reduce N2O and NO2--N in PN process. Compared with unaerated VFCW, NH4+-N and TN removal efficiencies in aerated VFCW were significantly improved by 118.48% and 78.14%, respectively. The aerated wetland mode can effectively eliminate the problem of high NO2-- N and N2O pollution, reducing the NO2--N concentration from 17.07 mg/L to 0.34 mg/L and achieving a N2O removal rate of 88.72%.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Environmental Sciences
Liya Li, Jingwei Feng, Liu Zhang, Hao Yin, Chunli Fan, Zechun Wang, Menglei Zhao, Chengchang Ge, Hao Song
Summary: The study revealed significant differences in nitrogen and phosphorus removal efficiency of subsurface flow constructed wetlands (SFCWs) filled with different substrates. Intermittent aeration improved nitrogen and phosphorus removal efficiencies of SFCWs, with the front section being the main pollutant removal area. Precipitation and adsorption on substrates were identified as the main mechanisms for phosphorus removal.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Environmental Sciences
Yingrun Chen, Jian Zhang, Zizhang Guo, Ming Li, Haiming Wu
Summary: This study explored the effects of biomass dosage on the treatment performance, N2O emission, and microbial metabolites in constructed wetlands. The results showed that the addition of biomass significantly enhanced the denitrification performance, with a slight increase in N2O emission. Additionally, the biomass addition increased the accumulation of EPS.
ENVIRONMENTAL RESEARCH
(2022)
Article
Green & Sustainable Science & Technology
Rongzhen Wang, Xinwen Zhang, Shuya Yang, Zhenghe Xu, Chengye Feng, Fangxing Zhao
Summary: This study designed a novel hybrid constructed wetland with sulfur-siderite filler and drop aeration to enhance nitrogen removal. The results showed that the TN removal rate increased significantly, with sulfur autotrophic denitrification as the dominant pathway. Compounds generated during nitrogen removal acted as trace elements, promoting the growth of wetland plants.
JOURNAL OF CLEANER PRODUCTION
(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
Green & Sustainable Science & Technology
Ying-ke Fang, Hong-cheng Wang, Jing-long Han, Zhi-ling Li, Ai-jie Wang
Summary: This study investigated the performance and mechanism of nitrogen removal in a novel low-strength wastewater treatment technology called the bioelectrochemical system integrated constructed wetland (BES-CW). The results showed that under low temperature, the BES-CW effectively removed nitrate and reduced greenhouse gas emission. Specific bacteria played a crucial role in the nitrate removal process in the BES-CW.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Engineering, Environmental
Hong-cheng Wang, Ying Liu, Yu-meng Yang, Ying-ke Fang, Shuang Luo, Hao-yi Cheng, Ai-jie Wang
Summary: Constructed wetlands integrated with sulfur autotrophic denitrification using elemental sulfur as the carbon source have the potential to efficiently remove nitrogen from carbon-limited wastewater. The sulfur autotrophic denitrification process in the SCW enhances nitrate removal efficiency and rate. The combined CW-SCW system allows for simultaneous removal of total ammonia nitrogen and nitrate.
Article
Ecology
C. A. Arias, D. Istenic, O. Stein, X. Zhai, R. Kilian, I. Vera-Puerto, H. Brix
Summary: This study assessed the impact of recycling water from VFCW effluent on a decentralized wastewater system and recommended an appropriate bed depth based on the changes in water quality. The results showed that the system performed well and the dimensions given in the Danish guidelines may be overdesigned.
ECOLOGICAL ENGINEERING
(2022)
Article
Agricultural Engineering
Jinjin Chen, Mengchun Gao, Yangguo Zhao, Liang Guo, Chunji Jin, Junyuan Ji, Zonglian She
Summary: This study investigated the removal of nitrogen and sulfamethoxazole (SMX), and the microbial communities in a partially saturated vertical flow constructed wetland (PS-VFCW) fed with synthetic mariculture wastewater operated at different saturated zone depths (SZDs). The results showed that SZD had a significant impact on the removal efficiency, with different depths showing variation in nitrification and denitrification performance. Various important microbial communities were found in the unsaturated zone, which played a key role in the removal of organics, nitrogen, and SMX.
BIORESOURCE TECHNOLOGY
(2022)
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
Engineering, Environmental
Yuanyuan Miao, Liang Zhang, Deshuang Yu, Jianhua Zhang, Wenke Zhang, Guocheng Ma, Xinchao Zhao, Yongzhen Peng
Summary: Intermittent aeration is an effective strategy for biological wastewater treatment, allowing for advanced nitrogen removal and reduced energy consumption. It is suitable for partial nitrification and denitrification processes.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Environmental Sciences
Shaoyon Lu, Yaru Zhang, Xiaohui Liu, Jiamin Xu, Ying Liu, Wei Guo, Xianbin Liu, Jing Chen
Summary: The study found that long-term exposure to SMX significantly increased nitrate removal rates in IVCWs, while ammonia nitrogen removal rates were not significantly affected. The presence of SMX led to a decrease in bacterial richness and alterations in bacterial community structures, especially those of nitrogen-transforming microorganisms. The molecular ecological network analysis revealed that SMX had positive effects on denitrifying bacteria interactions but reduced the complexity of the microbial network as a whole.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2021)
Article
Agricultural Engineering
Feng Gao, Guochen Liu, Zonglian She, Junyuan Ji, Mengchun Gao, Yangguo Zhao, Liang Guo, Chunji Jin
Summary: This study found that PS-VFCW can efficiently remove NH4+-N, TIN and COD at 0.4-2.4% salinity levels, with salt-adaptable bacteria becoming dominant.
BIORESOURCE TECHNOLOGY
(2021)
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)