Article
Engineering, Environmental
Jin-Min Li, Jiun-Hau Ou, Francis Verpoort, Rao Y. Surmpalli, Wen-Yen Huang, Chih-Ming Kao
Summary: This study investigated the source identification, risk, and toxicity assessment of heavy metal-contaminated sediments in the Salt River in Kaohsiung, Taiwan. Results showed high concentrations of Zn, Cr, and Ni in the midstream area and higher toxic units in the midstream compared to the downstream and upstream. The inputs of heavy-metal-containing wastewaters from nearby industrial parks and vehicle emissions, non-point source pollution, and domestic wastewater discharges were identified as the possible sources of heavy metal pollution in the upstream residential and commercial areas.
WATER ENVIRONMENT RESEARCH
(2023)
Article
Green & Sustainable Science & Technology
Shenqun An, Ying Song, Qiang Fu, Rong Qi, Zehao Wu, Feiyang Ge, Xiaoqian Lu, Wei An, Wenxuan Han
Summary: Reclaimed water is increasingly used to address the water resource crisis caused by accelerated urbanization worldwide. Although it enriches aquatic ecosystems with organic matter, nitrogen, and phosphorus, its impact on the self-purification capacity of receiving waters remains poorly understood. This study evaluated the effects of reclaimed water use on water quality, sedimentary bacterial diversity, community structure, and function. The results showed that reclaimed water improved water quality, increased bacterial abundance, and enhanced the carbon, nitrogen, and phosphorus removal functions of polluted waters. These findings contribute to a better understanding of the ecological impact of reclaimed water on urban aquatic ecosystems and inform the rational use of reclaimed water in urban rivers.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Environmental Sciences
Mariana Valdez-Castillo, Jose Octavio Saucedo-Lucero, Karla Lizeth Villalobos-Romero, Fatima Perez-Rodriguez, Sonia Arriaga
Summary: Bioaerosols are emitted during biological treatment processes, leading to a significant impact on human health. Advanced oxidation technologies, such as photocatalysis, have been utilized to control bioaerosol emissions and improve indoor air quality. The study evaluated the efficiency of biofiltration in removing ethyl acetate vapors and explored a continuous photocatalytic process with TiO2/Poraver showing a 78% inactivation rate of bioaerosols.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Microbiology
Yong-Chao Wang, Yu-Ting Lin, Can Wang, Zhen Tong, Xu-Rui Hu, Ya-Hui Lv, Guan-Yu Jiang, Meng-Fei Han, Ji-Guang Deng, Hsing-Cheng Hsi, Chung-Hak Lee
Summary: This study demonstrates that interrupting bacterial communication can reduce biomass accumulation and improve operational stability in gas biofilters. Quorum quenching bacteria have the ability to weaken biofilm adhesion and decrease extracellular polymeric substance production, leading to easier detachment of biomass from the filler surface. Furthermore, interruption of bacterial communication also influences the relative abundance of species and the expression of functional genes in the biofilm.
Article
Environmental Sciences
Xiongkai Zheng, Bowen Zhang, Weibin Lai, Mengting Wang, Xueqin Tao, Mengyao Zou, Jiangmin Zhou, Guining Lu
Summary: Efficient and environmentally friendly soil amendments are necessary to reduce the risk of metal contaminants to the soil ecosystem. Bovine bone meal (BM) and oyster shell meal (OS) can reduce the mobility and bioavailability of metals by increasing soil pH. The geochemical properties of the soil have a greater impact on metal migration than enzyme activity. BM and OS can suppress the uptake of Cd and Pb by water spinach, keeping them below international safety standards. The protein and sugar content, as well as peroxidase activity, show a negative correlation with metal content in water spinach, while superoxide dismutase activity, ascorbate peroxidase activity, and malondialdehyde content exhibit a positive correlation. BM and OS have minimal disturbance on bacterial composition during heavy metal remediation. Overall, BM and OS are eco-friendly amendments that can improve soil nutrients, stabilize heavy metals, and regulate bacterial communities.
Article
Agricultural Engineering
Sabeela Beevi Ummalyma, Anamika Singh
Summary: This study evaluated polluted river water as a medium for the growth of oleaginous microalgae. The results showed that this medium improved water quality and increased the biomass and lipid yields of the microalgae, while reducing pollution loads in wastewater.
BIORESOURCE TECHNOLOGY
(2022)
Article
Environmental Sciences
Xin Jin, Jing Jiang, Lei Zhang, Guangyu Shi, Xueyan Li, Longfei Zhang, Xuyu Chen, Feiyue Qian
Summary: Channel confluences in urban rivers have complex hydrodynamic conditions and significantly impact the distribution of pollutants and microbial communities. However, the principles of bacterial community assembly and their linkages with environmental factors in these areas remain poorly understood. In this study, high-throughput sequencing technology was used to investigate the hydrodynamic and pollution conditions in a typical channel confluence in the Yangtze River delta area and their effects on bacterial community structure in water and sediment. The results showed that flow velocity was a crucial factor influencing the dispersal of nutrients, organic compounds, and bacterial communities in the river water. Sediments exhibited higher alpha-diversity and bacterial richness for nitrogen and sulfur cycling compared to the water. In addition to flow velocity, the contents of total organic carbon, total phosphorus, and heavy metals determined the sediment bacterial communities at varying depths. The predictive analysis of functional gene category indicated differences between the water and sediment communities in terms of metabolic potentials and pathogen risk, providing guidance for water pollution control and eco-remediation of urban rivers.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Ecology
Zhikang Wang, Kaixin Yang, Junbao Yu, Di Zhou, Yunzhao Li, Bo Guan, Yang Yu, Xuehong Wang, Zhonghua Ren, Wei Wang, Xin Chen, Jisong Yang
Summary: This study investigated the bacterial community structures and diversities in different micro-habitats of the tidal creeks in the Yellow River estuarine wetland. The results showed significant differences in bacterial community structures and dominant bacterial taxa among different habitats. Bacterial community diversities decreased significantly with distance away from the tidal creeks.
FRONTIERS IN ECOLOGY AND EVOLUTION
(2022)
Article
Environmental Sciences
B. Camenen, N. Gratiot, J-A Cohard, F. Gard, V. Q. Tran, A-T Nguyen, G. Dramais, T. van Emmerik, J. Nemery
Summary: The hydrological dynamics of the Saigon River is influenced by a variety of factors, with this study proposing a low-cost method for estimating river discharge. Seasonal behaviors were observed in both water level and water discharge, with rainfall having little impact on them. Evidence of interactions between precipitation and coastal waters was found.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Mathiyazhagan Narayanan, Murugan Prabhakaran, Devarajan Natarajan, Sabariswaran Kandasamy, Rathinam Raja, Isabel S. Carvalho, Veeramuthu Ashokkumar, Arunachalam Chinnathambi, Sulaiman Ali Alharbi, Kesavan Devarayan, Arivalagan Pugazhendhi
Summary: The study demonstrates that phycoremediation treatment with indigenous microalgal species can significantly reduce the physicochemical parameters in polluted water, decrease the concentrations of BOD, COD, and increase dissolved oxygen levels. Furthermore, Fourier-Transform Infrared Spectroscopy and Scanning Electron Microscope analysis confirmed the presence of pollutant absorbing active functional moieties on the surface of Chlorella sp., which effectively absorbs pollutants during treatment.
Article
Engineering, Environmental
Cui Liu, Xiao Huang, Jianghua Yu, Wei Si, Yicheng Fu
Summary: Using water supply sludge to prepare ceramsite for sewage treatment shows good adsorption performance and removal efficiency. The optimal conditions for water supply sludge-based ceramsite were determined, and it demonstrated high adsorption of NO3 -N and PO43 -P. When used as denitrification biofilter carrier, the removal efficiencies of COD and TN were high, but TP removal efficiency gradually decreased. The microbial community richness remained stable during the biofilm formation, but microbial diversity decreased. The main dominant microbial communities were Acinetobacter and Methylophilaceae.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Engineering, Environmental
Zhuwu Jiang, Zhongjian Zheng, Mengfan Wu, Yang Qu, Chaoqun Zheng, Jyunhong Shen
Summary: Currently, the problem of not meeting increasingly strict emission standards in the biological treatment of domestic sewage with high nitrogen and phosphorus stress has become prominent, especially when there is insufficient carbon source. To efficiently treat low-carbon sewage, a full-scale integrated system based on a combination of an up-flow aerated biofilter and a denitrification shallow biofilter (UAB-DSB) was constructed and applied practically. By investigating the effects of different operation parameters, optimal removal efficiencies of COD, NH4+-N, TN, and TP were achieved, resulting in excellent quality effluent.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Heidi Christa Steffen, Katrin Smith, Corne van Deventer, Chelsea Weiskerger, Caylin Bosch, Joao Brandao, Gideon Wolfaardt, Alfred Botha
Summary: This study investigates the risk of yeast infection through river water exposure and the impact of pollution levels on fungal communities. A quantitative microbial risk assessment framework is proposed to evaluate the potential risk of yeast infection. The results suggest that higher pollution levels significantly alter fungal communities and increase the abundance of opportunistic and pathogenic yeast species. The study provides valuable methods and insights for future research on yeast infections in river water.
Article
Multidisciplinary Sciences
Heqing Huang, Jianhui Liu, Fanghui Zhang, Kangwen Zhu, Chunhua Yang, Qiujie Xiang, Bo Lei
Summary: Urban rivers have distinct planktonic and sediment bacterial communities, with variations in diversity and composition driven mainly by temperature and nutrient levels.
Article
Environmental Sciences
Bhaskar Reddy, Suresh Kumar Dubey
Summary: River Ganga in India, significantly affected by anthropogenic activities, shows increased water pollution downstream. The study confirms drains as vectors of bacterial enrichment and reveals highly abundant pathogenic species in all samples. Upstream water exhibits the most positive interactions within the bacterial community, while downstream shows higher bacterial abundance and diversity, indicating potential ecological reference for understanding bacterial dynamics in freshwater ecosystems.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Engineering, Environmental
Yang Wang, Jiachunxiu Zhang, Wenyi Wang, Tianshu Wu, Yingxue Sun, Haiming Wu, Da Chen, Hai Liu
Summary: Fabricating polyaniline nanorod forests-modified carbon fiber felt has been shown to enhance the reduction of Cr(VI) and improve detoxification efficiency. The optimized CFF-PANI cathode with a larger BET and electrochemical surface area exhibited higher Cr(VI) removal and lower specific energy consumption compared to the CFF cathode. Additionally, operating the FES system at 0.8 V resulted in the lowest specific energy consumption and maintained high energy efficiency for Cr(VI) reduction.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Environmental Sciences
Likui Feng, Jian Zhang, Jinlin Fan, Liangliang Wei, Shufei He, Haiming Wu
Summary: This study quantitatively characterized dissolved organic matter (DOM) in 21 inflow rivers of Nansi Lake using spectroscopic techniques, revealing significant variations in DOM content and composition. The findings contribute to the understanding of the role of DOM in water-quality monitoring and control of storage lakes.
Article
Environmental Sciences
Junyu Huo, Xiaojin Hu, Shiyi Cheng, Huijun Xie, Zhen Hu, Haiming Wu, Shuang Liang
Summary: This study found that biochar, zeolite, and pyrite were more effective substrates compared to traditional gravel for improving nitrogen removal efficiency and reducing N2O emissions in constructed wetlands.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Environmental Sciences
Mengqi Li, Jian Zhang, Shuang Liang, Ming Li, Haiming Wu
Summary: This study found that introducing a magnetic field into vertical flow constructed wetlands significantly enhanced the removal of organic compounds and nitrogen. It also had no severe impact on wetland plants but significantly altered the microbial community.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Environmental
Ruigang Wang, Xin Zhao, Tiecheng Wang, Zizhang Guo, Zhen Hu, Jian Zhang, Shubiao Wu, Haiming Wu
Summary: The utilization of natural ores and mine waste as substrate in constructed wetlands can enhance nutrient removal performance. However, the potential negative environmental effects of contaminants leached from mine waste are not well understood. This study investigated the long-term feasibility and key removal mechanisms of different constructed wetlands using three types of mine waste as substrates. The results showed that the addition of mine waste increased the removal of total phosphorus and total nitrogen. The higher removal of phosphorus is mainly attributed to the strong binding mechanism of phosphate with the leached oxides and hydroxides of manganese, iron, and/or aluminum. Moreover, the integration of mine waste in constructed wetlands stimulated biofilm establishment and enriched the relative abundance of key functional genes related to the nitrogen cycle.
Article
Engineering, Environmental
Lin-Lan Zhuang, Mengting Li, Yingfei Li, Lijie Zhang, Xiaoli Xu, Haiming Wu, Shuang Liang, Chang Su, Jian Zhang
Summary: Biochar is considered as black gold in the field of environmental remediation, due to its high surface area, light density, and great adsorption capacity. It has high potential to improve wastewater purification in constructed wetlands. This paper systematically reviews the characteristics of biochar, methods of preparation, pollutant removal effects, and greenhouse gas emission reduction in constructed wetlands, providing guidance for further studies on biochar application. The study found that biochar produced from terrestrial plants was mainly used in constructed wetlands, while biochar produced from marine biology or other procedures may have different performance. Biochar affects the performance of constructed wetlands through multiple pathways, including physicochemical and hydraulic conditions, as well as biological behavior. The enhancement of pollutant removal in biochar-added constructed wetlands was quantified, with significantly higher removal rates for COD, ammonia, and TN compared to non-biochar wetlands. Moreover, biochar commonly reduces N2O emissions from constructed wetlands, although the mechanism behind this is still not fully understood. Further research is needed to advance our understanding of biochar's behavior in constructed wetlands for wastewater treatment.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Engineering, Environmental
Likui Feng, Shufei He, Hang Yu, Jian Zhang, Zizhang Guo, Liangliang Wei, Haiming Wu
Summary: This study investigated the role of wetland plants in the treatment of wastewater in constructed wetlands, finding that girdling plants led to a decrease in O-2 release and an increase in greenhouse gas emissions.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Environmental Sciences
Jingjing Du, Yulong Niu, Haiming Wu, Dennis Konnerup, Shubiao Wu, Carlos A. Ramirez -Vargas, Yanqin Yang, Hans Brix, Carlos A. Arias
Summary: Biofilter systems coupled with microbial electrochemical technology can improve the removal performance of pollutants. This study found that using coke as the electroconductive substrate in biofilter systems resulted in better removal of NH4+-N, NO3--N, and PO43--P compared to gravel systems. The presence of silicone tubings also played a crucial role in oxygen supply. The results provide valuable insights for the application of coke in composite matrix systems.
Article
Green & Sustainable Science & Technology
Yan Kang, Mei Li, Zizhang Guo, Ying Zhang, Weichao Li, Haiming Wu, Jian Zhang
Summary: The study found that electron shuttles play an important role in the removal of PFAS via Fe(III) reduction process, and NH4+, AC, and sucrose can significantly enhance the removal of PFOA and PFOS.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Environmental Sciences
Mengting Li, Shuhan Ge, Jian Zhang, Shubiao Wu, Haiming Wu, Lin-Lan Zhuang
Summary: The study demonstrated that an AP-CW system can effectively remove total nitrogen and total phosphorus from water without the need for carbon addition. The addition of microalgae in constructed wetlands can influence microbial communities and effluent quality, as well as increase the absolute abundance of denitrifying bacteria in the denitrification area.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Environmental
Jiaxing Lu, Jian Zhang, Huijun Xie, Yuming Jing, Mingde Ji, Zhen Hu
Summary: In this study, a novel wastewater treatment process combining sequencing batch reactor, constructed wetland and microalgal membrane photobioreactor (BCM process) was proposed. The process achieved satisfactory removal of polycyclic aromatic hydrocarbons (PAHs) and their substituted derivatives (SPAHs), and significantly reduced bacterial toxicity and genotoxicity. Microalgae played an important role in ensuring water security.
Article
Biotechnology & Applied Microbiology
Shuo Wang, Zhen Hu, Jian Zhang, Haiming Wu, Huijun Xie, Shuang Liang, Haodong Hu, Fenglin Jin
Summary: This study investigates the fate and mechanism of phosphine (PH3) production in lab-scale constructed wetlands (CWs), and reveals a new biological pathway to enhance phosphorus removal in CWs.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2022)
Article
Green & Sustainable Science & Technology
Yun Zhou, Bohua Ji, Ming Jiang, Yiyang Jin, Junjun Chang
Summary: This study investigated the treatment of SDS-containing greywater using lab-scale constructed wetlands (CWs) with a biochar substrate operated in tidal flow (TF) mode. The results showed that the biochar-amended CWs had better removal efficiency for NH4+-N compared to the gravel-only CWs, but had lower removal efficiency for phosphorus (P) and COD. TF mode not only improved pollutant removal performance but also effectively eliminated SDS stress in the CWs.
JOURNAL OF CLEANER PRODUCTION
(2023)
Review
Environmental Sciences
Haiming Wu, Ruigang Wang, Peihao Yan, Shubiao Wu, Zhongbing Chen, Yaqian Zhao, Cheng Cheng, Zhen Hu, Linlan Zhuang, Zizhang Guo, Huijun Xie, Jian Zhang
Summary: This article discusses the application, principles, and operational strategies of constructed wetlands (CWs) and provides guidance on their design and maintenance. CWs are used in over 50 countries to sustainably treat wastewater by utilizing natural processes to remove organic matter and nutrients while providing additional benefits such as ecosystem services and recreation. However, their performance can be affected by various factors, including weather conditions, wastewater composition, and operation.
NATURE REVIEWS EARTH & ENVIRONMENT
(2023)
Article
Environmental Sciences
Xiaowan Chen, Shengjiong Deng, Bohua Ji, Suqing Wu, Junjun Chang
Summary: Controlling nonpoint source pollution is crucial for protecting water environment. Surface-flow constructed wetlands (SFCWs) have been widely used to mitigate this pollution. A large-scale SFCW established near Qilu Lake in southwestern China was evaluated for its pollutant removal efficiencies, greenhouse gas emissions, and sediment properties over a year. The SFCW showed high efficiency in nitrogen removal, but limited effectiveness in total phosphorus and chemical oxygen demand removal. Methane emissions from the SFCW contributed most to its global warming potential. The microbial community composition varied with seasons, and optimization of SFCW construction, operation, and management is necessary for maximizing its environmental benefits.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
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)
