Article
Environmental Sciences
Myeonghwa Park, Jeongmi Kim, Teaho Lee, You-Kwan Oh, Van Khanh Nguyen, Sunja Cho
Summary: The study found that high salinity inhibits Anammox microbial activity, but high nitrogen removal efficiency can still be achieved at 2% salinity. In high salinity environments, the abundance of Anammox bacteria increases, replacing heterotrophic denitrifying bacteria.
Article
Engineering, Environmental
Buqing Chen, Yujie Qin, Chenglong Wu, Zhiju Liu, Lan Yang, Siyuan Gong, Shaohong Zheng
Summary: This study assessed the effect of glucose in a DEAMOX reactor, and found that adding glucose can promote nitrogen removal efficiency while maintaining a synergic relationship between denitrification microorganisms and anammox microorganisms during the DEAMOX process.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Environmental Sciences
XiaoTong Wang, Hong Yang
Summary: Four anaerobic ammonium oxidation (ANAMMOX) immobilized filler reactors were established to study the response of ANAMMOX immobilized fillers to seasonal temperature changes and different operating modes. The results showed that the ANAMMOX immobilized filler could adapt to seasonal temperature changes by adjusting the hydraulic retention time (HRT). The performance of ANAMMOX was impaired under feasting and famine conditions, and the nitrogen removal potential was significantly lowered under feasting conditions. The degradation kinetics and inhibition curves showed that different reactors responded differently to ammonia concentrations. Seasonal temperature fluctuations had little effect on the microbial community structure, but had a considerable impact on bacteria abundance. These findings highlight the importance of regulating HRT for the adaptation of ANAMMOX immobilized fillers to seasonal temperature changes.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Environmental
Genwang Chang, Yu Yang, Yifei Yang, Jinjin Yang, Shaokang Li, Xiaoying Mu, Jingwen Luo, Xiang Li
Summary: Substrate inhibition is a major threat to the stability of anaerobic ammonia oxidation (anammox) reactors. This study focused on the recovery process and microbial community changes in anammox reactors after inhibition. The results showed that reducing the ratio of influent NO2-N to NH4+-N promoted rapid recovery of the anammox system, and biofilms played a crucial role in resisting reactor destabilization.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Environmental Sciences
Na Chen, Xiao-jing Zhang, Deng-hui Wei, Yong-peng Ma, Nan Liu, Bing-bing Ma, Han Zhang, Hao-jie Yang
Summary: The long-term effects of sulfide at different concentrations on low substrate Anammox process were studied. It was found that AAOB was well coupled with sulfide-denitrifying bacteria and achieved a total nitrogen removal efficiency of 91.0% when the sulfide concentration was 25-30 mg L-1. However, 50 mg L-1 sulfide inhibited the nitrogen removal by AAOB, resulting in a decrease in total nitrogen removal efficiency to 81.7%. These experimental results provide a reference for the practical application of Anammox in treating sulfur-containing wastewater.
ENVIRONMENTAL TECHNOLOGY
(2023)
Article
Engineering, Environmental
Xinyi Zou, Mengjie Ma, Jiachen Zhu, Qun Zhang, Qianfei Cao, Sami Khasraw Hamid, Chongjun Chen
Summary: The study found that salinity, represented by SO42-, has an impact on the anammox reaction. Increasing concentrations of SO42- decreased the removal efficiency of NH4+-N and NO2--N, as well as affected the sludge characteristics and microbial community structure.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Engineering, Environmental
Zhibin Wang, Cuina Bu, Jianghai Dou, Sherif Ismail, Shakeel Ahmad, Daqian Qi, Haiwei Wei, Xue Chen, Taeho Lee, Ahmed Tawfik, Shou-Qing Ni
Summary: In this study, an anammox coupled DNRA system was constructed to achieve efficient nitrate to ammonia conversion under high C/N ratio environment. DNRA bacteria were enriched and accounted for 20% of total bacteria population, while a small amount of anammox bacteria were detected. This study demonstrates the reproducibility of natural processes and provides insights into enhancing nitrogen removal rates.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Agricultural Engineering
Kai Wan, Ye Yu, Jinggang Hu, Xuemei Liu, Xiangyi Deng, Junxia Yu, Ruan Chi, Chunqiao Xiao
Summary: This study investigated the recovery process of a reactor after being inhibited by a high nitrogen load. The results showed that after 75 days of recovery, the nitrogen removal rate and stoichiometric ratio of the reactor were restored to pre-inhibition levels. The surface structure of the granular sludge changed to a broccoli-like structure, and there was an increase in the Ca and P contents of the granules. Moreover, the abundance of the anammox bacterium Candidatus brocadia also increased, and it showed a positive correlation with specific microbial species.
BIORESOURCE TECHNOLOGY
(2022)
Article
Engineering, Environmental
Daotong Zhao, Hui Xiong, Xichang Shan, Xiejuan Lu, Xiao Liu, Qingjie Meng, Lei Miao
Summary: This study investigated the effect of high concentration of humic acid on the anammox biofilm system. It was found that high concentration of humic acid decreased nitrogen degradation rates and prolonged reaction time, and also affected the activity of anammox bacteria and microbial community structure.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Environmental Sciences
Wei Zhang, Xin Zhou, Xiwei Cao, Shuhan Li
Summary: This study introduces low intensity ultrasound into anaerobic sequencing batch biofilm reactors (ASBBRs) to enhance anammox nitrogen removal from nitrogen-rich wastewater. The study demonstrates a close correlation between nitrogen removal and shifts in transformation and intensity of spectrum peaks, as well as changes in the anammox consortium. The research provides a viable and promising acceleration strategy for anammox-based process.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Environmental
Wenli Fan, Yunfan Chen, Bo Yuan, Xi Chen, Qian Wang, Shuang Zhao, Wenlin Jia
Summary: The effects of different static magnetic field (SMF) intensities on nitrogen removal in Anammox batch reactors were analyzed, as well as the influence of influent nitrogen concentration. The results showed that applying an appropriate SMF intensity enhanced nitrogen removal performance, especially under high nitrogen loading conditions. A SMF intensity of 40 mT at normal nitrogen loading conditions resulted in the highest total nitrogen removal efficiency. Additionally, SMF strengthened the metabolic pathways related to bacterial growth and resistance to environmental stress.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Biotechnology & Applied Microbiology
Yu-Qing Zhang, Qi Sun, Bai-Hang Zhao, Jun Li, Xin-Yue Zhang, Bing-Lin Zhang, Bao-Jiang Liu
Summary: The study found that heavy metal Ni(II) has an inhibitory effect on the anammox system, and high concentrations can lead to system deterioration. Ni(II) significantly affects microbial communities and EPS content. The self-recovery of the system takes a longer time.
BIOCHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Zhiju Liu, Yujie Qin, Xiangyin Liu, Lan Yang, Siyuan Gong, Shaohong Zheng, Xinyue Lin, Junfeng Yang, Tiansheng Lu, Jiannv Chen
Summary: The effects of substance concentration and glycine betaine on nitrogen removal and microbial communities in the sulfide autotrophic denitrification and Anammox coupling process were investigated. It was found that increasing substance concentration decreased the efficiency of ammonia and total nitrogen removal, but adding glycine betaine improved the removal efficiency. High-throughput sequencing results showed that increasing substrate concentration led to a decrease in Anammox bacteria abundance and an increase in Thiobacillus abundance.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Engineering, Environmental
Jingwei Ma, Weile Yang, Shuizhou Ke, Qiulai He, Quanbao Zhao, Huasheng Yin
Summary: The simultaneous anammox and denitrification (SAD) process was achieved by enriching denitrifying bacteria (DNB) through the addition of sodium acetate to anammox granular sludge. The study investigated the pollutant removal effect and the composition of the main functional microbial community under different organic loads by manipulating the influent C/N ratio. The results showed that the highest total nitrogen removal efficiency of 89.05% was achieved at a C/N ratio of 1, and Candidatus_Brocadia was the dominant genus of AnAOB.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Agricultural Engineering
Wenyu Li, Yongzhen Peng, Ruitao Gao, Qiong Zhang, Xiyao Li, Chengkun Kao, Jianwei Li
Summary: This study investigates the impact of low salinity levels on a double-anammox system in treating municipal wastewater, finding that a salinity of 1.0% led to a nitrogen removal efficiency of 81.2%, with a significant contribution of 76.5% from anammox. Low salinity was also found to promote nitritation and denitratation, enhancing the overall nitrogen removal efficiency. The enrichment of specific microbial populations, such as Ca. Brocadia and Nitrosomonas, further supported the effectiveness of the double-anammox process in treating saline wastewater.
BIORESOURCE TECHNOLOGY
(2022)
Article
Environmental Sciences
Fu-ang Duan, Juan Wang, Sherif Ismail, Shihwu Sung, Zhaojie Cui, Shou-Qing Ni
Summary: This study demonstrates that modified aerobic granular sludge with hydroxypropyl-beta-cyclodextrin significantly improved the removal efficiency of specific PAHs. Factors such as initial concentration, temperature, and ion concentration were found to influence the removal process.
ENVIRONMENTAL TECHNOLOGY
(2022)
Article
Environmental Sciences
Tong Zhang, Xuming Zhuang, Shakeel Ahmad, Taeho Lee, Chengbo Cao, Shou-Qing Ni
Summary: This study investigated the role of dissimilatory nitrate reduction to ammonium (DNRA) in the stability of urban river networks and marine ecosystems. The research identified a significant positive correlation between DNRA rate and sediment organic carbon, with Anaeromyxobacter as the dominant genus and both heterotrophic and autotrophic DNRA species present. It added diversity to urban freshwater river ecosystem studies and provided new insights into the biological nitrogen cycle of typical urban inland rivers in eastern China.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Review
Environmental Sciences
Hafiz Adeel Ahmad, Shakeel Ahmad, Qingjie Cui, Zhibin Wang, Haiwei Wei, Xue Chen, Shou-Qing Ni, Sherif Ismail, Hanem M. Awad, Ahmed Tawfik
Summary: Emerging pollutants, such as pharmaceuticals and plasticizers, have raised global concerns due to their low concentration and severe toxicity. Research in the past decades has focused on the environmental distribution, ecological disturbance, and removal of EPs, but systematic reviews on the degradation of different EPs by using microbes are limited. This review article highlights the importance of using different microbes to degrade EPs and emphasizes the eco-friendly approach.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Lijuan Deng, Wenshan Guo, Huu Hao Ngo, Xinbo Zhang, Cheng Chen, Zhuo Chen, Dongle Cheng, Shou-Qing Ni, Quan Wang
Summary: This review highlights the importance of media used in attached growth MBR (AGMBR) for wastewater treatment, with conventional media enhancing pollutant removal and new media excelling in removing emerging pollutants. Additionally, media improve sludge characteristics and alleviate membrane fouling issues. Future research should focus on developing new functional media for wider spectrum pollutant removal and enhancing biogas generation in AGMBRs at pilot or full-scale levels.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Chemistry, Multidisciplinary
Yeonju Kim, Jaecheul Yu, Soyeon Jeong, Jeongmi Kim, Seongjae Park, Hyokwan Bae, Sung-Keun Rhee, Tatsuya Unno, Shou-Qing Ni, Taeho Lee
Summary: This study evaluated the effect of Ca2+ and Mg2+ augmentation on the recovery of freshwater anammox granules affected by salinity stress. The results showed that adding Ca2+ and Mg2+ at optimal concentrations increased the granules' activity and EPS production. Salinity stress did not significantly affect the microbial community in the granules. The alleviation effect of divalent cations on salinity stress might be associated with increased EPS production rather than changes to the anammox bacteria.
APPLIED SCIENCES-BASEL
(2022)
Article
Green & Sustainable Science & Technology
Muhammad Abdul Qyyum, Sherif Ismail, Shou-Qing Ni, Ihsanullah Ihsanullah, Rizwan Ahmad, Amin Khan, Ahmed Tawfik, Abdul-Sattar Nizami, Moonyong Lee
Summary: This article comprehensively evaluates recent reports on hydrogen production from wastewater and highlights fermentation as one of the most promising methods. The study found that the sequential dark/photo fermentation approach offers maximum hydrogen yield, but more pilot-scale studies are needed. Additionally, the current challenges in implementing and commercializing wastewater hydrogen production are emphasized.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Engineering, Environmental
Xiufeng Cao, Xiaowei Cui, Meng Xie, Rui Zhao, Lei Xu, Shouqing Ni, Zhaojie Cui
Summary: Intensified phytoremediation shows great potential in remediation of complex co-contaminated soils, with different plants exhibiting varying efficiency in removing PAHs and heavy metals. Amendments and microbial agents can significantly increase the efficiency of phytoremediation.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Multidisciplinary Sciences
Yuyang Xie, Xiaolin Liu, Haiwei Wei, Xue Chen, Ningji Gong, Shakeel Ahmad, Taeho Lee, Sherif Ismail, Shou-Qing Ni
Summary: Direct sewage discharge has serious and irreversible harm to the environment, especially to the river ecosystem. Sewage discharge leads to changes in the microbial community structure of the river, reducing the diversity and richness of bacteria, while increasing the gene abundance of pathogenic bacteria.
SCIENTIFIC REPORTS
(2022)
Article
Biotechnology & Applied Microbiology
Jinliang Xu, Qingjie Cui, Cuina Bu, Sherif Ismail, Shou-Qing Ni
Summary: This study evaluated the microbial community of different types of sludge in a full-scale sidestream partial nitrification-anammox plant to understand the separation mechanism of anammox and nitrifiers. Suspended sludge showed higher partial nitrification capacity while biofilm sludge had higher anammox activity. High-throughput results revealed that Nitrosomonas was the main active ammonia-oxidizing bacteria in suspended sludge, and Candidatus Brocadia had the highest abundance in biofilm sludge.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2022)
Article
Biotechnology & Applied Microbiology
Kuo Zhang, Xinjue Li, Shou-Qing Ni, Sitong Liu
Summary: The study investigated the impact of different carrier materials on nitritation performance, finding that the Sepiolite nonwoven composite carrier significantly inhibits nitrite-oxidizing bacteria, improving the efficiency of the nitritation process and holding significant importance for mainstream wastewater treatment.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2022)
Article
Engineering, Environmental
Yiyi Zhao, Qianxia Li, Qingjie Cui, Shou-Qing Ni
Summary: This study constructed three organic substances supported DNRA systems in a membrane bioreactor and investigated the effect of different COD/N ratios on ammonium nitrogen transformation efficiency and microbial community diversity. The results showed that the ethanol-supported DNRA system at a COD/N ratio of 7.7 had the highest ammonium nitrogen transformation efficiency and nrfA gene abundance, and contained a large number of fermenting bacteria. In addition, potential metabolic pathways of three carbon sources were predicted.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Environmental Sciences
Lingrui Kong, Yiming Feng, Jingqi Sun, Kaiyu Rong, Jianhang Zhou, Ru Zheng, Shouqing Ni, Sitong Liu
Summary: Co-cultivation of two algae taxa, Chlorella sp. and Phormidium sp., in photobioreactors showed a cooperative relationship with cross-feeding and resulted in higher protein production and nitrogen removal rate compared to individual cultures. The study highlights the importance of algal interspecies interaction in algae-based wastewater treatment.
ENVIRONMENTAL RESEARCH
(2022)
Article
Environmental Sciences
Zhibin Wang, Jinpeng Zhang, Jing Zhou, Sherif Ismail, Hafiz Adeel Ahmad, Hanem M. Awad, Ahmed Tawfik, Shou-Qing Ni
Summary: Laboratory-scale bioreactors were used to study the effect of dimethyl sulfoxide (DMSO) on the start-up, pollutant removal efficiency, and microbial community of nitrification. DMSO concentrations above 2% had a significant inhibitory effect on the nitrification process. The microbial community was significantly different at high DMSO concentrations, with key classes changing from Blastocatellia and Clostridia to Actinobacteria and Acidobacteria.
Article
Engineering, Environmental
Zhibin Wang, Cuina Bu, Jianghai Dou, Sherif Ismail, Shakeel Ahmad, Daqian Qi, Haiwei Wei, Xue Chen, Taeho Lee, Ahmed Tawfik, Shou-Qing Ni
Summary: In this study, an anammox coupled DNRA system was constructed to achieve efficient nitrate to ammonia conversion under high C/N ratio environment. DNRA bacteria were enriched and accounted for 20% of total bacteria population, while a small amount of anammox bacteria were detected. This study demonstrates the reproducibility of natural processes and provides insights into enhancing nitrogen removal rates.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Environmental Sciences
Jianyuan Zhen, Yiyi Zhao, Xuefeng Yu, Wenshan Guo, Zhuangming Qiao, Sherif Ismail, Shou-Qing Ni
Summary: The combination of partial nitrification, nitrite-denitrifying phosphorus removal, and simultaneous nitrification-endogenous denitrification showed high efficiencies in COD, nitrogen, and phosphorus removal. It provided an economic and technical alternative for treating wastewater with high levels of C, N, and P, reducing costs and carbon demand.
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)
