Article
Environmental Sciences
Cong Li, Qian Wang, Wenlin Jia
Summary: The study achieved denitrifying phosphorus removal in sequencing batch reactors using different carbon sources, and investigated factors affecting N2O production. When propionate was used as the carbon source, nitrogen removal was lower and N2O production was greatly reduced. The higher N2O production in the acetate system was attributed to the enrichment of ordinary heterotrophic organisms.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Review
Environmental Sciences
Hongliang Dai, Ting Han, Tongshuai Sun, Hui Zhu, Xingang Wang, Xiwu Lu
Summary: The paper discusses the emission characteristics and influencing factors of N2O in denitrifying P removal processes, proposing appropriate strategies for controlling N2O emissions. This work serves as a basis for the development of new sewage treatment processes and the reduction of greenhouse gas emissions in future wastewater treatment plants.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Engineering, Environmental
Jiayu Zhang, Wei Zeng, Qingan Meng, Hongjun Liu, Sijia Lu, Yongzhen Peng
Summary: This study investigated the denitrifying phosphorus removal (DPR) performance of Tetrasphaera at different nitrite concentrations. The results showed that Tetrasphaera can efficiently remove nitrite and phosphorus at an appropriate nitrite concentration. Additionally, this study found that the Tet2-892 clade of Tetrasphaera is more tolerant to FNA inhibition.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Agricultural Engineering
Yawen Sun, Yongzhen Peng, Yanhui Chen, Qiong Zhang, Xiyao Li
Summary: The response mechanism of denitrifying phosphate-accumulating organisms (DPAOs) under starvation conditions was investigated. The decay of metabolic activity contributed to the damaged denitrifying phosphorus removal (DPR) performance, while the biomass decay had a smaller impact. The genus Dechloromonas, affiliated to DPAOs, exhibited stronger adaptability to starvation.
BIORESOURCE TECHNOLOGY
(2022)
Article
Engineering, Environmental
Shuqi Ren, Yingrui Liu, Yanying He, Tingting Zhu, Xueming Chen, Yiwen Liu
Summary: A mathematical model was developed to describe the dynamics of N2O production in the denitrifying phosphorus removal (DPR) system. This model clarified the source and pathways of N2O production and showed the competition between denitrifying polyphosphate-accumulating organisms (DPAOs) and denitrifying glycogen-accumulating organisms (DGAOs) in the system. Simulation results demonstrated the importance of operational conditions on N2O production and nutrients removal efficiency.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Mingchang Gao, Shaofang Sun, Qi Qiu, Weiwei Zhou, Liping Qiu
Summary: This study employed the alternating anoxic-anaerobic/aerobic biofilter system for DPAOs enrichment and successfully achieved simultaneous nitrogen and phosphorus removal from domestic wastewater. Results showed that DPAOs contributed 84% to the overall phosphorus removal after 60 days of operation.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Agricultural Engineering
Yangang Lin, Yawen Sun, Liyuan Zhang, Qiong Zhang, Xiyao Li, Jun Sui, Yongzhen Peng
Summary: Balancing the removal of nitrogen and phosphorus in municipal wastewater under carbon limitation remains challenging. The key parameter in achieving this balance is the COD-to-PO43--P ratio. By operating an A(2)/O-BCO system for 205 days, it was found that increasing the COD/P ratio deteriorated the nitrogen removal performance, while decreasing it led to the proliferation of Ca.Competibacter and an increase in nitrogen removal. The nitrogen and phosphorus removal efficiency reached up to 79.3% and 95.2%. Overall, establishing a balance between DGAOs and DPAOs through strengthening the effect of DGAOs can improve nutrient removal performance and enhance the stability and efficiency of the system.
BIORESOURCE TECHNOLOGY
(2023)
Article
Agricultural Engineering
Hao Zhang, Wei Zhang, Shuang-Shuang Zhang, Wu-Cheng Ma, Liang Zhu, Yi-Ping Li, Yang Pan, Lin Chen
Summary: A novel process for simultaneous denitrification and phosphorus (P) recovery was proposed. The increased nitrate concentration facilitated the activity of denitrifying P removal (DPR) and stimulated P uptake and storage. The total P content in the biofilm and the P concentration in the enriched stream significantly increased. Additionally, the abundance of denitrifying polyphosphate accumulating organisms (DPAOs) increased, and the genes involved in critical functions of metabolism also increased.
BIORESOURCE TECHNOLOGY
(2023)
Article
Environmental Sciences
Jun Yin, Kristopher A. Hunt, Ting Xie, Bao Nguyen Quoc, Kim Tran, David A. Stahl, Mari-Karoliina H. Winkler
Summary: Coupling denitrifying polyphosphate accumulating organisms (DPAO) with anaerobic ammonium oxidizing (Anammox) bacteria in a single treatment scheme has challenges due to their competition for nitrite and different growth rates. This study aimed to uncouple their solid retention time (SRT) by growing them in different sludge fractions and found that Anammox bacteria had higher nitrite affinity in biofilms, while DPAO were more sensitive to nitrite and better suited for growth in the protective biofilm.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Chemistry, Multidisciplinary
Bowen Zhang, Taoran Tian, Dexuan Xiao, Shaojingya Gao, Xiaoxiao Cai, Yunfeng Lin
Summary: A DNA-enhanced HCR detection system (T-probe system) is introduced for the detection of cancer-related targets, demonstrating its versatility and efficiency by detecting miRNA-21 and nucleolin. The T-probe system shows high detection rate and rapid recognition of both membrane and intracellular cancer-related targets, and exhibits superior fluorescence for imaging tumor-related biomarkers in vitro and in vivo, indicating its great potential for clinical diagnosis and therapeutic applications.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Environmental Sciences
Hu Wu, Jie Wang, Jieyu Chen, Xiaoning Wang, Dapeng Li, Jie Hou, Xugang He
Summary: The novel simultaneous nitrogen and phosphorus removal process combines nitrification, endogenous denitrification, and denitrifying phosphorus removal to achieve high-efficiency nutrient removal in constructed wetlands. The success of the process is attributed to the utilization of DGAOs and DPAOs in utilizing carbon sources for endogenous denitrification and denitrifying phosphorus removal.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Environmental Sciences
Yawen Sun, Liang Zhang, Yongzhen Peng, Yanhui Chen, Yangang Lin
Summary: In this study, an innovative dynamic influent disturbance control system was established and applied in laboratory-scale experiments to simulate sewage fluctuations. The system showed high tolerance to diurnal fluctuations but its ability to cope with sinusoidal flow variations depended on the amplitude. There was also a discrepancy in the system's buffering capacity towards different pollutants.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Xiangyu Sun, Chunyu Wang, Junbo Zhang, Zhongtai Chen, Ting Yu, Guangjing Xu, Jingni Xiao
Summary: Due to stricter standards for municipal wastewater discharge, further treatment is needed for nitrate in secondary effluent of wastewater treatment plants, which increases the costs. This study examined the possibility of simultaneous removal of nitrate and phosphorus from simulated secondary effluent using a sponge-iron-based denitrifying filter. The results showed that over 60% of the nitrate was reduced through abiotic nitrate reduction by the sponge iron. However, the sponge iron easily scaled and a little glucose was added to dissolve the rust and promote biological nitrate denitrification.
Article
Environmental Sciences
Rui Yang, Linjiang Yuan, Ru Wang
Summary: This study analyzed the activities of denitrifying enzymes in a continuously operating sequencing batch reactor under different organic loads. The results showed that the enzyme activities increased with the increase of organic loads, and the catalytic processes of different enzymes were influenced by substrate concentration and carbon sources. The Nor maintained excess catalytic activity when the electron donor and substrate were sufficient, while the N2OR had generally weaker activity. The mechanism of enzyme activities regulating the production of N2O was clarified.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Ana Paula Sanchez Bustamante-Bailon, Andrew Margenot, Richard A. C. Cooke, Laura E. Christianson
Summary: Denitrifying woodchip bioreactors are effective in removing nitrogen, but their potential for phosphorus removal is influenced by the aluminum and iron content in the woodchips, as well as factors like water matrix and particle size. While woodchip bioreactors may contribute to dissolved phosphorus removal, the mechanisms involved are likely diverse, including chemical sorption and particle purification.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Engineering, Environmental
Gang Guo, Di Wu, George A. Ekama, Tianwei Hao, Hamish Robert Mackey, Guanghao Chen
Article
Biotechnology & Applied Microbiology
Yan-Xiang Cui, Gang Guo, Basanta Kumar Biswal, Guang-Hao Chen, Di Wu
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
(2019)
Article
Engineering, Environmental
Gang Guo, Di Wu, George A. Ekama, Natalia P. Ivleva, Xiaodi Hao, Ji Dai, Yanxiang Cui, Basanta Kumar Biswal, Guanghao Chen
Review
Agricultural Engineering
Gang Guo, George A. Ekama, Yayi Wang, Ji Dai, Basanta Kumar Biswal, Guanghao Chen, Di Wu
BIORESOURCE TECHNOLOGY
(2019)
Article
Engineering, Environmental
Yan-Xiang Cui, Gang Guo, George A. Ekama, Yang-Fan Deng, Ho-Kwong Chui, Guang-Hao Chen, Di Wu
Article
Agricultural Engineering
Zhongwei Wu, Gang Guo, Basanta Kumar Biswal, Ji Dai, Guanghao Chen
BIORESOURCE TECHNOLOGY
(2020)
Article
Engineering, Environmental
Feixiang Zan, Asad Iqbal, Gang Guo, Xiaoming Liu, Ji Dai, George A. Ekama, Guanghao Chen
Article
Environmental Sciences
Gang Guo, Tianwei Hao
Summary: The study aimed to optimize the granulation of SOAD sludge by adjusting reactor configuration and mixing mode. Results showed dense and compact granules developed in Reactor C, leading to better nitrate removal and sulfur conversion performance.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Feixiang Zan, Gang Guo, Tianlong Zheng, Guanghao Chen
Summary: The study found that the early high specific surface area in the formation of sewer biofilms promoted the growth of primary colonizers, leading to the evolution of biofilms with higher organic content, thickness, and density. The growth of biofilms also promoted the emergence of anaerobes, resulting in the production of sulfide. Overall, the migration of microbial communities correlated with changes in the physical characteristics and microstructure of sewer biofilms, which can contribute to improving sewer maintenance.
ENVIRONMENTAL RESEARCH
(2021)
Article
Environmental Sciences
Feixiang Zan, Hao Huang, Gang Guo, Guanghao Chen
Summary: The study found that sulfite pretreatments can enhance the biodegradability of sludge mixtures and improve substrate release. Additionally, methane production from the sludge mixture increased, while the volume of digested sludge decreased after sulfite pretreatment.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Agricultural Engineering
Jie Ma, Zhiwei Gong, Zongping Wang, Hui Liu, Guanghao Chen, Gang Guo
Summary: This study investigated the impact of different terminal electron acceptors on the degradation of polyhydroxyalkanoate (PHA), revealing significant influences on the degradation rates and pathways of PHA compared to other representative plastics. The main functional bacteria involved in PHA degradation were identified, providing insight into potential degradation mechanisms and pathways.
BIORESOURCE TECHNOLOGY
(2022)
Review
Engineering, Environmental
Gang Guo, Zhaoling Li, Lei Chen, Qingshan Ling, Feixiang Zan, Heba Isawi, Tianwei Hao, Jie Ma, Zongping Wang, Guanghao Chen, Hui Lu
Summary: This paper provides a comprehensive overview of S-0-driven biotechnologies in wastewater treatment, including their applications, associated microbiology, and biochemistry. It also discusses the physicochemical characteristics of S-0 and the effects of environmental factors on the process. Research gaps, challenges, and potential areas for future research are proposed and discussed.
Article
Environmental Sciences
Tianwei Hao, Qingshan Lin, Jie Ma, Wentao Tang, Yihang Xiao, Gang Guo
Summary: This study investigated the functional microbial community and distribution of functional genes associated with denitrifying sulfur conversion-assisted enhanced biological phosphorus removal (DS-EBPR) in saline wastewater treatment using metagenomics and multivariate statistics. The study identified four groups of microorganisms (SRB, SOB, DPAOs, and GAOs) that synergistically performed their respective metabolisms. The distribution of functional genes changed in abundance between the anaerobic and anoxic conditions, suggesting interactions and competition between the microorganisms.
ENVIRONMENTAL RESEARCH
(2022)
Article
Environmental Sciences
Qingshan Lin, Yanchao Yuan, Feixiang Zan, Hui Lu, Zongping Wang, Gang Guo
Summary: This study developed an online analyzer based on 5-point pH titration for automatic measurement of volatile fatty acids (VFAs). By adjusting the coefficients of the PID and setting the initial titration speed, the analyzer can achieve rapid, accurate, and reliable monitoring of VFAs concentration.
JOURNAL OF ENVIRONMENTAL SCIENCES
(2022)
Review
Biotechnology & Applied Microbiology
Yan-Xiang Cui, Basanta Kumar Biswal, Gang Guo, Yang-Fan Deng, Hao Huang, Guang-Hao Chen, Di Wu
APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
(2019)
