Article
Engineering, Environmental
Dandan Zhang, Mingyue Li, Yuchun Yang, Huang Yu, Fanshu Xiao, Chengzhi Mao, Jie Huang, Yuhe Yu, Yunfeng Wang, Bo Wu, Cheng Wang, Longfei Shu, Zhili He, Qingyun Yan
Summary: The anaerobic microbial nitrogen removal process in lake sediments is an important part of the nitrogen cycling in lake ecosystems. However, the mechanisms regulated by denitrifying and anaerobic ammonia oxidation bacteria in lake sediments are not well understood. This study examined the denitrifying and anammox bacterial communities in Lake Donghu sediments and found that the concentrations of NO(3)(-) and NO2-, as well as Nar enzyme activity, were key factors affecting these communities. The enrichment experiments confirmed the divergence of denitrification and anammox rates with the addition of NO2-. The study advances our understanding of the mechanisms driving denitrification and anammox in lake sediments and provides new insights into coupled denitrification-anammox nitrogen removal in eutrophic lake ecosystems.
Article
Agricultural Engineering
Qian-Qian Zhang, Xiao-Ming Ji, Guang-Ming Tian, Ren-Cun Jin
Summary: The study examined the individual and combined impacts of copper ion (Cu2+) and oxytetracycline (OTC) on anammox performance and its self-recovery process. The results showed that anammox bacteria were inhibited by 1.0 mg L-1 OTC, Cu2+, and OTC + Cu2+, but the inhibition was reversible. The abundance of functional genes and some antibiotic resistance genes (ARGs) were positively related to the dominant bacterium Ca. Kuenenia, indicating that the recovery of performance was associated with the induction of potentially resistant species.
BIORESOURCE TECHNOLOGY
(2021)
Article
Agricultural Engineering
Qian-Qian Zhang, Hui Qian, Pei-Yue Li, Jian-Qiang Zhao, Ya-Qiao Sun, Ren-Cun Jin
Summary: The experimental results show that the stress on Anammox performance caused by Cu2+ is reversible, and the inhibition can be slowed down by the combination of OTM and Cu2+. The positive relation between dominant bacteria and abundance of functional genes implies that the recovery of performance is due to the gradual domestication of latent resistant species.
BIORESOURCE TECHNOLOGY
(2021)
Article
Agricultural Engineering
Hong Chen, Hong Wang, Guanlong Yu, Ying Xiong, Haipeng Wu, Min Yang, Rong Chen, Enzhe Yang, Changbo Jiang, Yu-You Li
Summary: By controlling dissolved oxygen and aeration rate, stable performance can be maintained under oxygen-limiting conditions. The activation of ammonia oxidation bacteria (AOB), dominated anammox bacteria (AMX), suppression of NOB, and control of heterotrophic bacteria (HB) played a major role in achieving long-term stable operation in the biofilms.
BIORESOURCE TECHNOLOGY
(2021)
Article
Chemistry, Physical
Santanu Majumdar, Madhuri Ghosh, Suprabhat Mukherjee, Biswarup Satpati, Biswajit Dey
Summary: The formation of a flexible supramolecular hydrogel structure based on DNA and graphene oxide nanosheets leads to the achievement of nano-bio functionality. This hydrogel is utilized for the synthesis of functional silver nanoparticles and the production of smart bacteria-mediated nano-bio composites. Gram-positive and Gram-negative bacteria are employed to offer stability and catalytic effects on the silver nanoparticles.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Agricultural Engineering
Hao Su, Dachao Zhang, Philip Antwi, Longwen Xiao, Zhidan Zhang, Xiaoyu Deng, Cheng Lai, Jiejun Zhao, Yukun Deng, Zuwen Liu, Miao Shi
Summary: The study found that the release of La(III) during the mining and processing of rare earth minerals may affect nitrogen removal processes in water, but moderate levels of La(III) can promote the relative abundance of certain bacteria and improve nitrogen removal efficiency. Additionally, a lack of cooperating bacteria can also limit the activity of certain bacteria.
BIORESOURCE TECHNOLOGY
(2021)
Article
Agricultural Engineering
Zichun Zhang, Huaikai Yang, Bin Wang, Chao Chen, Xiaoshuang Zou, Tuo Cheng, Jiang Li
Summary: The production of organic fertilizer through aerobic composting of cattle manure is an important method of resource utilization. This study examined the effects of adding mature compost on the decomposition and microbial communities during aerobic composting of cattle manure. The addition of mature compost shortened the composting cycle and resulted in a lignocellulosic degradation rate of 35%. Metagenomic analysis revealed that this was due to an increase in thermophilic and organic matter-degrading microorganisms, which enhanced the activity of carbohydrate-active enzymes. The microbial community exhibited stronger metabolic functions, particularly in carbohydrate and amino acid metabolism, driving the degradation of organic matter. This study deepens our understanding of organic matter conversion and microbial community metabolism in livestock manure composting using mature compost, offering a promising technology for livestock manure composting.
BIORESOURCE TECHNOLOGY
(2023)
Article
Engineering, Environmental
Zhaolu Feng, Guangxue Wu
Summary: The successful start-up of anaerobic ammonium oxidization (anammox) system is crucial for its application. Two different feeding patterns (pulse and constant) were studied, with pulse feeding showing quicker start-up and reaching steady state faster than constant feeding. Heterotrophs and other microorganisms play important roles in nitrogen and carbon metabolisms, while a quorum sensing system was also found in the anammox system. Complex microbial interactions such as competition, cooperation, and cross-feeding were observed and had an impact on system performance.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Agricultural Engineering
Geer An, Rong Yan, Zhimin Fu, Zepeng Chen, Yaru Guo, Jun Yang, Yongheng Zhou
Summary: The purpose of this study was to investigate the tolerance mechanism of anammox consortia in a microbial fuel cell (MFC) system at low temperature. The data showed that a total nitrogen removal of nearly 80% was achieved after the temperature dropped from 30°C to 15°C. The nitrogen removal rate of the system decreased by 26.3% at 15°C, indicating the impact of low temperature on the performance.
BIORESOURCE TECHNOLOGY
(2023)
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
Engineering, Environmental
Wenxing Li, Peihua Zhang, Hao Qiu, Cornelis A. M. Van Gestel, Willie J. G. M. Peijnenburg, Xinde Cao, Ling Zhao, Xiaoyun Xu, Erkai He
Summary: The study investigates the impact of CeO2 nanoparticles on soil microbial responses and how earthworms can mitigate these effects. CeO2 NPs alone decrease enzyme activities involved in soil N and P cycles, but earthworm presence alleviates these effects. Both CeO2 NPs and earthworms alter soil bacterial community and metabolite profiles, with more significant changes observed under CeO2 NP exposure with earthworms.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Environmental Sciences
Meina Hu, Xiaojing Liu, Shidi Liu, Tao Ya, Minglu Zhang, Tingting Zhang, Xiaoping Gao, Xiaohui Wang
Summary: This study investigated the impact of sulfamethoxazole (SMX) on microbial interactions in anammox consortia. The findings showed that low concentrations of SMX were well tolerated by the system, while high concentrations significantly reduced the abundance of functional microbes and deteriorated denitrification performance.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Microbiology
Ye Huang, Xiu-Tong Li, Zhen Jiang, Zong-Lin Liang, Pei Wang, Zheng-Hua Liu, Liang-Zhi Li, Hua-Qun Yin, Yan Jia, Zhong-Sheng Huang, Shuang-Jiang Liu, Cheng-Ying Jiang
Summary: The microbial community of acid mine drainage (AMD) shows significant physicochemical variations and microbial diversity across different mining areas, with Mg2+ and SO42- being the predominant factors shaping microbial structure. Functional redundancy and diverse metabolic potentials are identified in polymetallic AMD compared to copper AMD. Physicochemical parameters such as Mg2+, SO42-, Ca2+, temperature, and Fe2+ drive iron, sulfur, nitrogen, and carbon metabolisms in the microbial communities, distinguishing microbial profiles between copper mine AMD and polymetallic AMD.
FRONTIERS IN MICROBIOLOGY
(2021)
Article
Environmental Sciences
Jin-Jin Fu, Dong-Qi Huang, Yu-Hui Bai, Yang-Yang Shen, Xia-Zhen Lin, Yong Huang, Yi-Rong Ling, Nian-Si Fan, Ren-Cun Jin
Summary: The study demonstrates the resistance of the anammox process to multiple antibiotics by producing antibiotic resistance genes and secreting extracellular polymeric substances. Molecular docking simulations reveal potential binding sites between ammonium transporter and different antibiotics, supporting the stable operation of the anammox system under antibiotic stress.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
