Article
Agronomy
Anita Jakubaszek
Summary: The study found that young plants in the rapid growth stage contain the highest levels of total nitrogen and total phosphorus, while the leaves of common reeds have a higher capacity for nitrogen phytoaccumulation. The surface layer of the filtration material in constructed wetland beds has the highest content of total nitrogen and total phosphorus, with accumulation decreasing with depth and outflow direction of sewage.
Article
Environmental Sciences
Fenglin Jin, Zhen Hu, Huaqing Liu, Jixin Su, Jian Zhang, Shuo Wang, Yanhui Zhao
Summary: Substrate clogging is a major challenge in the operation of subsurface flow constructed wetlands (SSF-CWs). This study investigated the impact of substrate clogging on phosphorus (P) accumulation behavior in SSF-CWs. Results showed that increasing clogging degree led to reduced P removal efficiency at low clogging degree, but higher P removal efficiency at high clogging degree. Substrate adsorption was the primary removal pathway in all SSF-CW systems, with higher Fe/Al-P accumulation on the substrate in the highly clogged system.
Article
Environmental Sciences
Yinuo Zhu, Lijuan Cui, Jing Li, Rumiao Wang, Jan Vymazal, Wei Li, Yinru Lei, Manyin Zhang, Ting Hao, Jiaming Wei
Summary: Constructed wetlands (CWs) are efficient technologies for wastewater treatment and water resource reuse. A study evaluating the performance of an integrated CW over ten years found consistent removal rates of TN and TP, with higher bacterial richness and diversity in summer and autumn. Microorganisms related to denitrification and dephosphorization played a significant role in the bacterial community, with Pseudomonas abundance positively correlated with TN and TP removal rates.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Environmental
Jing Lu, Mingming Wang, Jun Wei, Lingwei Kong, Bin Yang, Gaoming Wu, Lecheng Lei, Zhongjian Li
Summary: An electrolysis-integrated constructed wetland using pyrite as filler was developed in this study. Synergistic effects of pyrite filler and electrolysis process were observed, leading to improved phosphorus and nitrogen removal. Additionally, acidification caused by water electrolysis inhibited nitrification process and desorption of phosphorus.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Biotechnology & Applied Microbiology
Xuan Cuong Nguyen, Quang Viet Ly, Jianxin Li, Hyokwan Bae, Xuan-Thanh Bui, Thi Thanh Huyen Nguyen, Quoc Ba Tran, Thi-Dieu-Hien Vo, Long D. Nghiem
Summary: Through data mining and machine learning models, it was found that six input features including ammonium, total nitrogen, hydraulic loading rate, filter height, aeration mode, and types of inlet feeding have significant influences on ammonium removal rate in subsurface constructed wetlands (SCW). The Cubist algorithm emerged as the optimal model with the highest predictive accuracy.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Agricultural Engineering
Xiaoxiao Hou, Linglong Chu, Yifei Wang, Xinshan Song, Yingying Liu, Dongpeng Li, Xiaoxiang Zhao
Summary: This study successfully established a microelectrolysis-assisted constructed wetland using sponge iron as filler surrounding the cathode (e-SICW), which reduced ammonia accumulation and intensified the removal of nitrate, total nitrogen, and total phosphorus.
BIORESOURCE TECHNOLOGY
(2023)
Article
Environmental Sciences
Yinjin Zeng, Weibin Xu, Han Wang, Dan Zhao, Hui Ding
Summary: In wastewater treatment, micro-polluted water can be effectively treated using suitable substrates and autotrophic denitrifying bacteria. In this study, the self-assembled composite material (PSM) showed the most remarkable nitrogen and phosphorus removal performance among different substrates. By establishing accurate models, we can simulate the denitrification processes and nitrate nitrogen removal in vertical flow constructed wetland (VFCWs).
Article
Environmental Sciences
Daniel A. Lemley, Chuene P. Lakane, Susan Taljaard, Janine B. Adams
Summary: This study investigates the efficiency of nutrient removal in a constructed wetland used to treat urban runoff. The findings show low removal efficiency for dissolved inorganic nutrient (DIN), but high efflux of dissolved inorganic phosphate (DIP). Due to short water residency and increased flow volume, the surface area of the wetland needs to be increased to cope with the current daily inputs.
MARINE POLLUTION BULLETIN
(2022)
Article
Engineering, Environmental
Rongzhen Wang, Lirong Xu, Xiangxi Xu, Zhenghe Xu, Xin Cong
Summary: The flow state of the water body inside the constructed wetland is complex and affected by various factors. By simulating and evaluating the hydraulic performance of different construction parameters in the wetland, key factors for improving wetland utilization efficiency and enhancing hydraulic performance were identified.
WATER SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Environmental
Fucheng Guo, Yang Luo, Min Nie, Feifei Zheng, Gongliang Zhang, Yi Chen
Summary: Biochar has been found to enhance nitrogen removal in constructed wetlands treating secondary effluent from wastewater treatment plants. This study demonstrated that biochar derived from wetland plants can significantly improve total nitrogen removal efficiencies. Biochar enhances plant growth and microbial activities, leading to increased nitrogen uptake and microbial denitrification.
CHEMICAL ENGINEERING JOURNAL
(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
Yuan Yan, Yongzhi Chen, Xinbo Wu, Hongzhong Dang, Tianxu Zeng, Jiao Ma, Chenxin Tang
Summary: This study developed a novel strategy for achieving partial nitrification-anammox (PNA) in an integrated vertical subsurface flow constructed wetland (VSFCW) to improve the removal of nitrogen in rural domestic sewage. The strategy involved oxidizing ammonia to nitrite in the partial nitrification VSFCW and then removing ammonia and nitrite through the autotrophic anammox process in the following chamber. The results showed high removal efficiencies for chemical oxygen demand, total nitrogen, and PO43--P, confirming the feasibility of the proposed strategy.
ENVIRONMENTAL RESEARCH
(2023)
Article
Environmental Sciences
Cong Li, Likui Feng, Jianjun Lian, Xiaoting Yu, Chunzhen Fan, Zhen Hu, Haiming Wu
Summary: This study investigated the effect of a static magnetic field on the purification efficiency and microbial mechanism in vertical flow constructed wetland systems for treating domestic wastewater. The results showed that the systems with magnetic field outperformed control systems in terms of treatment performance, and the activity of enzymes indicated the beneficial effects of the magnetic field on plant health. Additionally, the high ammonia monooxygenase activity in the magnetic field-treated systems suggested enhanced removal of ammonia. High-throughput sequencing results demonstrated that the magnetic field application enriched functional bacteria, which further accelerated pollutants transformation. These findings contribute to understanding pollutant removal processes and mechanisms in constructed wetlands with magnetic field application.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Environmental Sciences
Chaoqun Zheng, Xuanwen Zhang, Lin Gan, Zhaofang He, Jinling Zhu, Wen Zhang, Yan Gao, Liuyan Yang
Summary: Adding biochar to surface flow constructed wetlands can improve water purification efficiency, but excessive addition may inhibit plant growth. The study showed that biochar affects water quality and microbial activity, with potential benefits for microbial communities related to nitrogen and phosphorus removal.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Review
Engineering, Environmental
Deepti Negi, Shelly Verma, Swati Singh, Achlesh Daverey, Jih-Gaw Lin
Summary: Constructed wetland is a sustainable eco-technology for remediation of contaminants, but its nitrogen removal efficiency is unsatisfactory. Anammox, an eco-friendly technology, can be integrated into constructed wetlands to overcome the shortcomings.
CHEMICAL ENGINEERING JOURNAL
(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)