Article
Engineering, Environmental
Yongyin Xiao, Peilun Kang, Peihan Zheng, Zile Liang, Liting Yao, Yuhai Liang
Summary: This study used high-throughput sequencing technology to analyze the microbial characteristics of four different types of CANON reactors and clarified the applicable scenarios of different types of reactors. At the gene level, the proportions of aerobic ammonia oxidizing bacteria (AerAOB), anaerobic ammonia oxidation bacteria (AnAOB), and denitrifying bacteria were determined for each reactor type. Results showed that FSBR had low nitrogen removal load and stability, while MBR, BAF, and GSBR were capable of treating different concentrations of ammonia nitrogen wastewater based on their influent load.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Biotechnology & Applied Microbiology
Xiaojing Zhang, Denghui Wei, Zhao Chen, Hongli Zhang, Han Zhang, Bingbing Ma, Aihua Gao
Summary: The simultaneous removal of nitrogen and sulfur pollutants is crucial, with low levels of sulfide enhancing total nitrogen removal efficiency while high levels of sulfide significantly decrease efficiency. After acclimatization, the CANON system can resist sulfide shock and achieve good nitrogen removal efficiency under 5 mg L-1 sulfide concentration. Prominent nitrogen removal is achieved through the cooperative contribution of CANON bacteria and denitrifying bacteria in the system.
BIOCHEMICAL ENGINEERING JOURNAL
(2021)
Article
Mathematics, Interdisciplinary Applications
Lei Lian, Peng Ji, Tianyu OuYang, Fengying Ma, Shanwen Xu, Chao Gao, Jing Liu
Summary: Microbial fuel cell (MFC) is a renewable clean energy technology that uses microorganisms to treat sewage and generate electricity, showing promising development prospects. For control-oriented single-chamber MFC, a fuzzy integral sliding mode control can be designed to ensure stable output and minimize system chattering through adaptive adjustment of control parameters based on system state.
Article
Biotechnology & Applied Microbiology
Chengzhi Yu, Xinying Zhang, Shaohong Zhao, Weiliang Zhang, Xiaolong Li, Limin Zhang, Meixiang Chen, Dan Lin, Liyan You
Summary: The study presents a start-up method for complete autotrophic nitrogen removal via the CANON granular sludge process by controlling the dissolved oxygen concentration. Optimum process parameters include an 8-hour reaction period and an aeration/non-aeration time ratio of 1.0 hour/0.25 hour. This approach can effectively maintain high activity for both AOB and AnAOB, promoting sludge granulation for enhanced performance in nitrogen removal.
BIOCHEMICAL ENGINEERING JOURNAL
(2021)
Article
Agricultural Engineering
Xiaojing Zhang, Hongli Zhang, Zhao Chen, Denghui Wei, Yali Song, Yongpeng Ma, Hongzhong Zhang
Summary: Nitrogenous fertilizer wastewater was treated by anaerobic digestion and CANON process, with high efficiency and low concentrations of COD, ammonia, and total nitrogen in the effluent. Methanothrix and Methanomassiliicoccus were dominant methane production archaea, while Nitrosomanas, Candidatus Kuenenia, and Truepera were functional bacteria for nitrogen removal.
BIORESOURCE TECHNOLOGY
(2021)
Article
Agricultural Engineering
Qian-Qian Zhang, Ning Liu, Jin-Ze Liu, Yan Yu, Ying Chen, Wen-Jing Fu, Jian-Qiang Zhao, Ren-Cun Jin
Summary: This study assessed the influence of hydrazine and hydroxylamine on the performance and microbial community structures of the CANON process. The results showed that both hydrazine and hydroxylamine promoted the activity of specific bacteria and inhibited others. The CANON process could operate stably without hydrazine, but required hydroxylamine for performance maintenance.
BIORESOURCE TECHNOLOGY
(2022)
Article
Microbiology
Min Cai, Yiguo Hong, Jiapeng Wu, Selina Sterup Moore, Teofilo Vamerali, Fei Ye, Yu Wang
Summary: This study investigated the effects of NO3-, NH4+, dissolved oxygen (DO), and organic C on microbial nitrogen removal in pond sediments using slurry incubation experiments and N-15 tracer techniques. The addition of NO3- significantly promoted denitrification rates, while elevated DO concentrations inhibited denitrification. Organic C increased denitrification rates, but had little influence on nitrogen removal due to abundant NH4+ in pond sediments.
Article
Engineering, Environmental
Shuang Liu, Xinxin Xu, Hongli Li, Ming Zeng, Linlin Hao, Ruihua Zhao, Jingguo Cao, Nan Wu, Zongpeng Zhang
Summary: Achieving stable operation of anammox-based wastewater treatment plants under low temperature and high organic concentrations remains a challenge. This study systematically investigated the performance of anammox-based systems with different microbial morphologies under mainstream conditions. The results showed that granules and biofilm were more effective in treating wastewater under low and mesophilic temperatures.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Agricultural Engineering
Shuohui Shi, Lei He, Ying Zhou, Xing Fan, Ziyuan Lin, Xuejie He, Jian Zhou
Summary: This study investigated the response of a thermophilic denitrification system (50 degrees C) to a wide range of pH (3-11) and found that it could adapt to pH 5-11 but suffered from nitrite and ammonia accumulation at pH 3. The enrichment of specific functional thermophiles contributed to the tolerance towards unfavorable pH, and the selection advantage of nitrate reducing bacteria and the enrichment of DNRA bacteria were responsible for the nitrite and ammonia accumulation at pH 3. Functional gene prediction denoted higher narG/(nirK + nirS) and nrfA at pH 3, facilitating partial denitrification and DNRA.
BIORESOURCE TECHNOLOGY
(2022)
Article
Engineering, Environmental
Zhi Hu, Jin Li, Yulong Zhang, Wenzong Liu, Aijie Wang
Summary: This study demonstrates that the application of voltage in a bioelectrochemical system can effectively promote the activity of marine anammox bacteria in saline wastewater treatment, leading to an increase in nitrogen removal rate. The optimal voltage was found to be 1.5 V, which resulted in a 27.45% higher total nitrogen removal rate compared to without applied voltage. The study also revealed that higher voltage (>2.0 V) had a negative effect on MAB activity, but the bioactivity was recoverable after removing the high voltage.
Article
Environmental Sciences
Liurui Peng, Rui Shi, Youqi Tao, Qian Huang, Maoyuan Yang, Yuecheng He, Wenlai Xu
Summary: This study investigates the feasibility of starting and operating anammox at low temperatures and finds that it is possible to achieve high nitrogen removal efficiency without the need for heating, making it a potentially energy-saving and cost-effective method.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Environmental Sciences
Xiaoou Wang, Jun Bai, Yimei Tian, Tao Wang, Xiaoxuan Zhou, Changping Zhang
Summary: The study found that the combination of natural ventilation and animal disturbance in constructed wetlands enhanced oxygen transfer, microbial activity, and removal of organics and nitrogen. This led to increased oxygen transfer rate, enzymatic activity, and removal loads of COD and NH3-N, ultimately improving overall nitrogen removal efficiency.
Article
Environmental Sciences
Renata Ontman, Peter M. Groffman, Charles T. Driscoll, Zhongqi Cheng
Summary: Soil microbes play a crucial role in biogeochemical processes in forest ecosystems. Soil pH is an important factor that positively affects these processes. However, our study found weak and/or curvilinear relationships between soil pH and microbial biomass and activity, suggesting that plant-microbial interactions and other complexities may inhibit or mask microbial response to changes in pH.
Article
Green & Sustainable Science & Technology
Wei Wang, Youyou Hu, Xin Qi, Yanqing He, Yuecheng She, Zhengkui Li
Summary: This study analyzed the molecular biological mechanisms of Feammox and NDFO in the iron-nitrogen cycle, as well as the endogenous and exogenous factors affecting nitrogen removal. The results showed that the changes in nitrogen cycle function genes were synchronized with the changes in microbial genera. Optimizing environmental factors such as pH, organic carbon, and extracellular electron shuttles improved nitrogen removal efficiency. This research provides a new perspective and practical support for nitrogen pollution removal in natural ecosystems or wastewater treatment systems.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Environmental Sciences
Xushun Gu, Yuanyuan Peng, Pan Yan, Yuanyuan Fan, Manping Zhang, Shanshan Sun, Shengbing He
Summary: This study explored the enhanced nitrogen removal in wetlands by combining iron scraps and plant biomass, as well as the microbial response. The findings showed that older plants improved the efficiency and stability of nitrogen removal. Plant age and temperature were key factors influencing the microbial community structure. The study highlighted the importance of aging microbes and potential endogenous pollution in the enhancement of nitrogen removal in mature wetlands.
SCIENCE OF THE TOTAL ENVIRONMENT
(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)