Article
Agricultural Engineering
Yanlin Chen, Rui Zheng, Qianwen Sui, Tharindu Ritigala, Yuansong Wei, Xiangqian Cheng, Jiehui Ren, Dawei Yu, Meixue Chen, Tuo Wang
Summary: By controlling the carbon dosage and aeration strategy, the nitrogen removal efficiency was improved in a full-scale swine wastewater treatment plant, leading to a reduction in energy consumption.
BIORESOURCE TECHNOLOGY
(2021)
Article
Engineering, Environmental
Hussein E. Al-Hazmi, Dominika Grubba, Joanna Majtacz, Aleksandra Ziembinska-Buczynska, Jun Zhai, Jacek Makinia
Summary: Recently, the combined partial denitrification and anammox (PD/anammox) process using organic matter in municipal wastewater has gained attention for sustainable N removal. It offers advantages such as reduced dissolved oxygen demand, lower organic carbon requirement, less excess sludge production, and lower greenhouse gas emissions compared to conventional nitrification-denitrification. This review discusses the latest improvements in PD/anammox systems and focuses on the production/consumption pathways of critical intermediate NO2-. The C/N ratio and concentration of dosed organic carbon are crucial for optimal efficiency, as overgrowth of denitrifying bacteria can negatively impact anammox activity. Microorganism competition in single-stage PD/anammox systems plays a key role in achieving efficient N removal from mainstream wastewater. Challenges and limitations in recognizing inhibition mechanisms and performance inhibitors are also addressed. Future research should explore combining PD/anammox with other processes and developing self-supporting bacterial systems to enhance total nitrogen removal efficiency.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Review
Engineering, Environmental
Quan Zhang, Xijun Xu, Ruochen Zhang, Bo Shao, Kaili Fan, Lei Zhao, Xiaoming Ji, Nanqi Ren, Duu-Jong Lee, Chuan Chen
Summary: This review summarizes the recent advances and characteristics of the mixed/mixotrophic nitrogen removal (MixNR) process guided by sulfur-driven autotrophic denitrification (SDAD) and anammox. It discusses the functional microorganisms in different MixNR systems, sheds light on metabolic mechanisms and microbial interactions, and highlights the importance of MixNR for carbon reduction in the BNR process. Knowledge gaps and future research directions that may facilitate the practical application of the MixNR process are also emphasized.
Article
Environmental Sciences
Gaigai Li, Jinxing Wang, Dingying Ning, Bingquan Chen, Jia Liu, Deyuan Jin, Wuke Guo, Jidong Liang, Hua Ji
Summary: In this study, anammox biofilter (ABF) was successfully started up by inoculating denitrification sludge at low nitrogen strength at 25 degrees C for the treatment of mainstream wastewater. The ABF achieved high total nitrogen removal efficiency and nitrogen removal rate, meeting the discharge standards.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Engineering, Environmental
Xinjie Gao, Liang Zhang, Yongzhen Peng, Jing Ding, Zeming An
Summary: The study found that stable nitrogen removal can be achieved in the anaerobic/aerobic/anoxic process by directly integrating stable anammox. The anammox activity compensates for the effects of low temperatures and low C/N ratios on nitrification and denitrification, leading to a stable nitrogen removal efficiency.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Green & Sustainable Science & Technology
Chihao Lin, Xiangmin Xiao, Yu-You Li, Jianyong Liu
Summary: Anaerobic ammonium oxidation (anammox) technology is seen as a promising alternative for wastewater treatment, with partial denitrification anammox (PDA) and partial nitritation anammox (PNA) being the mainstream processes. Comprehensive evaluation of their economic and environmental benefits is essential. The study proposed and analyzed two plant-wide processes, and showed that high rate activated sludge-PNA (HRAS-PNA) was more energy-efficient and cost-effective compared to chemically enhanced primary treatment-PDA (CEPT-PDA), with a significant decrease in total environmental impacts.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2023)
Article
Environmental Sciences
Hong Chen, Zhi Tu, Sha Wu, Guanlong Yu, Chunyan Du, Hong Wang, Enzhe Yang, Lu Zhou, Bin Deng, Dongbo Wang, Hailong Li
Summary: The novel process of partial denitrification (PD) coupled with anaerobic ammonium oxidation (AMX) shows great potential for nitrogen removal in municipal wastewater treatment. Research focuses on process mechanisms, microbial community characteristics, key operational parameters, stable operation, and control methods. Challenges lie in engineering and economic feasibility, full mainstream AMX application, and further study of PD-AMX mechanism optimization for better engineering practice.
Article
Agricultural Engineering
Yunlong Su, Rui Du, Jiao Wang, Xiyao Li, Qiong Zhang, Xiaofei Xue, Yongzhen Peng
Summary: In this study, anammox bacteria were efficiently enriched and retained in a suspended sludge system for mainstream wastewater treatment. The system provided favorable conditions for the growth of anammox bacteria, including low nitrogen loading rate, low ammonia and nitrate concentrations, and anoxic environment. This research demonstrated the feasibility and potential of applying anammox technology without specific sludge seeding in mainstream wastewater treatment.
BIORESOURCE TECHNOLOGY
(2023)
Article
Agricultural Engineering
Fangzhai Zhang, Yongzhen Peng, Zhong Wang, Hao Jiang, Shang Ren, Jingang Qiu
Summary: A novel process combining partial nitrification, fermentation, and Anammox-partial denitrification was proposed for co-treating ammonia-rich sludge supernatant, external WAS, and WWTP secondary effluent, achieving excellent nitrogen removal efficiency and external sludge reduction. This process showed significant collaboration between Anammox bacteria and partial denitrifying bacteria in the AD-UASB reactor, contributing to up to 84.1% of nitrogen removal, while saving organic resource demand and aeration consumption compared to traditional nitrification-denitrification processes.
BIORESOURCE TECHNOLOGY
(2021)
Article
Engineering, Environmental
Zhenju Sun, Jianzheng Li, Yiyang Fan, Jia Meng
Summary: A quantified nitrogen metabolic network was constructed based on metagenomics, reaction kinetics, and mathematical model in a single-stage microaerobic system, revealing that simultaneous partial nitritation-anammox and partial denitrification-anammox were the dominant approaches to nitrogen removal. High-frequency intermittent aeration was identified as the crucial measure to suppress nitrite-oxidizing bacteria.
Article
Agricultural Engineering
Xiping Liu, Xiyao Li, Yongzhen Peng, Qiong Zhang, Hao Jiang, Jiantao Ji
Summary: The study successfully established a SPDAF system for combined treatment of domestic sewage and nitrate wastewater from industrial areas, achieving a high TIN removal efficiency of 89.5%. Anammox played a crucial role in TIN removal, while in-situ fermentation provided electron donors to promote the utilization of complex organics.
BIORESOURCE TECHNOLOGY
(2021)
Article
Oceanography
T. B. Mashifane
Summary: The study reveals that denitrification and anammox result in changes in nutrient stoichiometry and phytoplankton community structure in the northern Benguela, with implications for phytoplankton composition and succession in the region. Denitrification limits picophytoplankton growth, leading to a dominance of flagellates and diatom succession. The interactions between denitrification, anammox, DIC uptake and primary production highlighted in the study have significant implications for the biological pump in the northern Benguela.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2021)
Review
Agricultural Engineering
Hussein E. Al-Hazmi, Mojtaba Maktabifard, Dominika Grubba, Joanna Majtacz, Gamal K. Hassan, Xi Lu, Grzegorz Piechota, Giorgio Mannina, Charles B. Bott, Jacek Makinia
Summary: PD-anammox, a promising sustainable method for nitrogen removal in wastewater, combines partial denitrification and anammox to address challenges with NOB suppression and NO3- accumulation. This review provides comprehensive insights into the PD-anammox system, including stable performance outcomes, operational parameters, and mathematical models. It also categorizes start-up and recovery strategies, examines its contributions to sustainable development goals, and suggests future trends for improving efficiency and integration into full-scale wastewater treatment systems.
BIORESOURCE TECHNOLOGY
(2023)
Article
Engineering, Environmental
Xinjie Gao, Qiong Zhang, Zeming An, Baishou Shao, Yongzhen Peng
Summary: Anaerobic ammonium oxidation (anammox) combined with partial nitrification (PN) can achieve energy self-sufficiency in wastewater treatment. The PNA process is beneficial for advanced and efficient nitrogen removal in carbon-limited wastewater treatment.
RESOURCES CONSERVATION AND RECYCLING
(2023)
Article
Agricultural Engineering
Yan Feng, Shuying Wang, Yongzhen Peng
Summary: This study used a novel continuous push-flow anaerobic-oxic-anoxic-oxic (AOAO) process to rapidly restore nitrogen elimination performance under deteriorated partial nitrification. The study also found that endogenous partial denitrification coupled with anammox in the anoxic zone is crucial for maintaining stable nitrogen removal.
BIORESOURCE TECHNOLOGY
(2022)
Article
Multidisciplinary Sciences
Haitao Xie, Yiguo Hong, Huamin Liu, Lijing Jiao, Jiapeng Wu, Lixin Wang
Article
Biodiversity Conservation
Xiaohan Liu, Jiapeng Wu, Yiguo Hong, Yiben Li, Yaohao Hu, Limei Wang, Yu Wang, Aimin Long
Summary: The study investigated the distribution of anammox bacteria in the South China Sea and found that Ca. Brocadia was the dominant genus. The simultaneous presence of anammox bacteria and particulate organic matter in the 50-200 m layer suggests that particles may serve as a favorable niche for anammox bacteria. The wide distribution of anammox bacteria in DO-rich sea waters indicates two possible survival strategies: attachment to particles and anaerobic metabolism, or free-living and aerobic metabolism.
DIVERSITY AND DISTRIBUTIONS
(2021)
Article
Ecology
Yaohao Hu, Yiguo Hong, Jiaqi Ye, Jiapeng Wu, Yu Wang, Fei Ye, Xiangyang Chang, Aimin Long
Summary: The study revealed a diversity and richness variation of DNRA bacteria along a salinity gradient in sediment cores of the Pearl River Estuary, with specific spatial distribution of DNRA bacterial communities driven by environmental factors. Dominant DNRA bacteria were identified as key populations in the PRE sediments.
Article
Environmental Sciences
Yu Wang, Fei Ye, Shengjun Wu, Jiapeng Wu, Jia Yan, Kaigin Xu, Yiguo Hong
SCIENCE OF THE TOTAL ENVIRONMENT
(2020)
Correction
Ecology
Yaohao Hu, Yiguo Hong, Jiaqi Ye, Jiapeng Wu, Yu Wang, Fei Ye, Xiangyang Chang, Aimin Long
Summary: A correction to the paper has been published, please see the link provided.
Article
Environmental Sciences
Yiguo Hong, Jiapeng Wu, Lijing Jiao, Yaohao Hu, Fei Ye, Yu Wang, Yiben Li, Limei Wang, Aimin Long
Summary: The study investigated the distribution patterns of Nitrospira communities in the Pearl River Estuary and found that particle-associated bacteria decreased significantly downstream, while free-living bacteria remained relatively stable. Tighter interactions were observed in particle-associated Nitrospira communities, indicating that particle association favored interactions.
ESTUARIES AND COASTS
(2021)
Article
Biotechnology & Applied Microbiology
Jing Lu, Yiguo Hong, Ying Wei, Ji-Dong Gu, Jiapeng Wu, Yu Wang, Fei Ye, Jih-Gaw Lin
Summary: The study analyzed the rates of ammonia oxidation (AO) and nitrite oxidation (NO) in the activated sludge from Xinfeng WWTPs, revealing strong activity of both processes. The research also identified AOB and Nitrospira as the main catalysts for nitrification in anammox-inoculated WWTPs, leading to efficient nitrogen removal.
Article
Multidisciplinary Sciences
Jiapeng Wu, Yiguo Hong, Xiang He, Xiaohan Liu, Jiaqi Ye, Lijing Jiao, Yiben Li, Yu Wang, Fei Ye, Yunhua Yang, Juan Du
Summary: This study investigated the abundance, community composition, and carbon fixation potential of ammonia-oxidizing archaea (AOA) in the South China Sea. The results showed that AOA had higher abundance and carbon fixation potential below the euphotic zone, and the potential increased with increasing water depth. The dominant genus of AOA shifted from Nitrosopelagicus in the epipelagic zone to an uncultured genus in the meso- and bathypelagic zones.
Article
Microbiology
Chunchen Hu, Jiapeng Wu, Limei Wang, Yiguo Hong
Summary: Paracoccus denitrificans R-1 strain was isolated from activated sludge in a sewage treatment plant in Taiwan. The complete genome sequencing, performed on the NovaSeq 6000 and PacBio Sequel platforms, revealed a chromosome of 4.05 Mb and a plasmid of 689 kb. The genome annotation identified 4,167 protein-coding genes, 49 tRNAs, and 8 rRNAs.
MICROBIOLOGY RESOURCE ANNOUNCEMENTS
(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
Multidisciplinary Sciences
Wei Sun, Lijing Jiao, Jiapeng Wu, Jiaqi Ye, Mingken Wei, Yiguo Hong
Summary: This study investigated the phylogenetic diversity, community composition, and environmental factors of Nitrospira communities in the South China Sea using high-throughput sequencing and statistical analyses. The study revealed a high diversity of marine Nitrospira, with a significant number of unknown species. The distribution of different species was influenced by environmental factors such as nitrate, temperature, and dissolved oxygen.
Article
Engineering, Chemical
Shuai Li, Ang Yue, Selina Sterup Moore, Fei Ye, Jiapeng Wu, Yiguo Hong, Yu Wang
Summary: Experimental results at different temperatures show that the highest N2O emissions were observed at 35 degrees Celsius, while the highest levels of dissolved N2O and estimated exchange flux of N2O were observed at 25 degrees Celsius. Denitrification rates increased significantly during incubation, with samples at 25 degrees Celsius and 35 degrees Celsius exhibiting higher rates than those at 15 degrees Celsius.
Article
Environmental Sciences
Hua Xiang, Yiguo Hong, Jiapeng Wu, Yu Wang, Fei Ye, Zheng Hu, Zhiming Qu, Aimin Long
Summary: In this study, N2O production, reduction, and emission processes in surface sediments of the Pearl River Estuary were analyzed. The results showed that N2O reduction potential increased from upstream to downstream, leading to a decrease in N2O emission rates. NosZ-II-type N2O-reducing bacteria played a dominant role in determining the release potential of N2O in the estuary.
ENVIRONMENTAL POLLUTION
(2023)
Article
Environmental Sciences
Yaohao Hu, Jiapeng Wu, Jiaqi Ye, Xiaohan Liu, Yu Wang, Fei Ye, Yiguo Hong
Summary: This study investigates the dissolved N2O and potential NPR, NRR, and NER as well as key functional genes related to N2O transformation in the Pearl River Estuary. The results show that higher N2O emission potential and NPR values were found in the upstream and midstream regions, while higher NRR values were detected in downstream. Additionally, nirS and nirK type N2O producers dominate the upstream zone, while abundant N2O reducers, especially nosZ II type N2O reducers, are observed in downstream. The gene abundance ratio (Rnir/nosZ) is significantly correlated with N2O emission potential (Re). Overall, this study highlights the influence of an imbalance between N2O production and reduction by multi-bacterial communities on N2O emission potential in estuarine sediments.
MARINE ENVIRONMENTAL RESEARCH
(2023)
Article
Engineering, Environmental
Francisco de Borja Ojembarrena, Elena Fuente, Angeles Blanco, Carlos Negro
Summary: Accumulation of Cr(VI) in industrial fiber cement process water can affect product quality and health, and it needs to be removed to avoid environmental risks. The study found that cationic cellulose nanocrystals (CCNCs) have higher adsorption efficiency and lower cost compared to conventional adsorbents.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
Review
Engineering, Environmental
Shentan Liu, Yangchen Zhang, Xiaojuan Feng, Sang-Hyun Pyo
Summary: This paper summarizes the common problems of constructed wetlands (CWs) and proposes corresponding optimized solutions, including thermal insulation and additional aeration in cold climates, choosing suitable plant species and planting patterns to enhance phytoremediation in CWs, using various methods to monitor and evaluate CW clogging, implementing anti-clogging measures, controlling greenhouse gas emissions during CW treatment, constructing and utilizing CW databases, designing appropriate CW types, and implementing strict technical management and supervision.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
Article
Engineering, Environmental
Norzila Mohd, Nazlina Haiza Mohd Yasin, Wan Hasnidah Wan Osman, Mohd Sobri Takriff
Summary: This study demonstrates that Chlamydomonas sp. is effective in removing nutrients from palm oil mill effluent and shows particular efficiency in the removal of ammonium and phosphate.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
Article
Engineering, Environmental
Mingzhen Zhang, Guijian Liu, Ruijia Liu, Jinzhao Xu, Wen Si, Yong Wei
Summary: Tieguanyin tea stem was used to synthesize modified biochar for the adsorption of copper and zinc. Among the modified biochar, Fe-BCs had the highest adsorption capacity, with Fe-BC650 being the best adsorbent. It reached adsorption equilibrium in 1 minute and had a maximum adsorption capacity of 303.5996 mg/g for Cu (II) and 254.0711 mg/g for Zn (II) in single-metal solutions. However, there were antagonistic impacts between Cu2+ and Zn2+.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
Article
Engineering, Environmental
Lingling Zhao, Qiaoshu Zhou, Yun Yang, Yuan Zhang, Yewei Qiu, Yanjun Chen, Xian Jin, Xiangjun Yang, Shixiong Wang
Summary: This research presents a method for selectively recovering gold from e-waste water using metal sulfides microspheres prepared by hydrothermal technique. The results show that the assistance of visible light significantly improves the gold adsorption performance of metal sulfides. The metal sulfides exhibit excellent gold adsorption properties, high selectivity, ultra-high adsorption capacity, and good recyclability.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
Article
Engineering, Environmental
Laishram Saya, W. Rameshwor Singh, Sunita Hooda
Summary: Organic-inorganic nanoblends, such as polysaccharide-blended-inorganic ones, have versatile applications and have gained significant research attention. In this study, a magnetic guar gum/graphene oxide nanocomposite blended with CuO was successfully prepared and investigated for its adsorption capacity for ciprofloxacin removal. The results showed that the nanocomposite exhibited excellent adsorption capacity and the adsorption process was spontaneous.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
Article
Engineering, Environmental
Umit Ecer, Sakir Yilmaz
Summary: A novel and effective catalyst Co@MIL-68(Fe)@Fe3O4@CM-BC was synthesized and used for the catalytic reduction of crystal violet in aqueous environments. The catalyst showed high efficiency in degrading crystal violet under specific conditions, and exhibited good regeneration performance.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
Article
Engineering, Environmental
Chi Zhang, Miao Zhang, Haohan Yang, Wei Cai, Jun Wu
Summary: Enhancing the bioaugmentation of common nitrifiers in the partial nitrification/anammox process can decrease the activity of nitrite oxidizing bacteria and increase the activity of anammox bacteria, leading to improved total nitrogen removal efficiency.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
Article
Engineering, Environmental
Runzhang Zuo, Dajun Ren, Yangfan Deng, Canhui Song, Yubin Yu, Xiejuan Lu, Feixiang Zan, Xiaohui Wu
Summary: This study found that fine bubble aeration in membrane bioreactors (MBR) can better control membrane fouling and reduce energy consumption. However, compared to fine bubble aeration, coarse bubble aeration released more proteins and polysaccharides, resulting in a decrease in functional bacteria and enzymes involved in nitrogen and phosphorus pathways.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
Article
Engineering, Environmental
Ch Tahir Mehmood, Jiekai Dai, Hanjun Zhao, Ziyi Zhong
Summary: Wirelessly powered photocatalyst-coated spheres (WPS) have been developed and demonstrated for various applications, including photodegradation and fouling control. These WPS are cost-effective, easy to fabricate, and have excellent visible light sources, making them suitable as carriers for photocatalysts.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
Article
Engineering, Environmental
Yifan Wang, Xiaoxuan Kang, Yuting Li, Ruyi Li, Chang Wu, Luyao Wang, Chongqing Wang, Tao Yang, Ming Ge, Zhangxing He
Summary: Cobalt/carbon nanofibers (Co/CNF) were prepared and exhibited excellent catalytic activity in the degradation of tetracycline by activating peroxodisulfate (PDS). The effects of process parameters on tetracycline removal were studied, and the reaction mechanism was confirmed through experiments.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
Article
Engineering, Environmental
Ting Wei, Yaqian Zhao, Jia Guo, Bin Ji, Alvaro Pun Garcia, Abraham Esteve Nunez
Summary: This study developed a novel lightweight substrate (Al-NLS) composed of aluminum sludge and polyurethane, and investigated its effectiveness in constructed wetlands (CWs). Results showed that Al-NLS had favorable adsorption capacities for phosphorus and removal efficiencies for pollutants in real domestic wastewater. It also positively influenced the microbial community. Therefore, Al-NLS can be considered as a new alternative substrate in CWs technology.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
Article
Engineering, Environmental
Dabojani Das, Achinta Bordoloi, Heyang Yuan, Daniel J. Caldwell, Rominder P. S. Suri
Summary: This study evaluates the degradation kinetics of antibiotic resistance genes and mobile genetic elements in water matrices by ozone treatment. The results show that extracellular antibiotic resistance genes can be effectively removed, while intracellular genes are more resistant to degradation. The impact of wastewater matrix on gene degradation is minimal.
JOURNAL OF WATER PROCESS ENGINEERING
(2024)
