Article
Engineering, Environmental
Santo Fabio Corsino, Michele Torregrossa
Summary: The study found that MABR outperformed the CAS system in the removal of TSS, COD, and total nitrogen, as well as achieving complete nitrification at a shorter SRT. Additionally, the biofilm detachment in MABR had a positive effect on the settling properties of the suspended biomass.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Environmental Sciences
Lisheng Wang, Wancong Gu, Yanchen Liu, Peng Liang, Xiaoyuan Zhang, Xia Huang
Summary: This paper summarizes the challenges and solutions of mainstream anammox-based process by reviewing the literature of the past decade. The slow growth rate of anammox bacteria and the need for enhancing bacteria retention are identified as the main challenges. Various methods to culture anammox bacteria and improve their activity are discussed. Other challenges include the elimination of nitrite oxidizing bacteria (NOB) and achieving the ideal ratio of NH4+ and NO2-. To overcome these challenges, composite control strategies based on low sludge retention time (SRT) and limited aeration are suggested. Interference from low temperature and influent components in actual wastewater treatment is addressed, as well as the use of coupling processes to reduce nitrate concentration in the effluent. The paper concludes with future prospects for the mainstream anammox-based process.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Agricultural Engineering
Haike Xiao, Yongzhen Peng, Qiong Zhang, Ying Liu
Summary: This study demonstrated the feasibility of starting and maintaining partial nitrification through pre-anaerobic treatment, as well as the feasibility of nitrogen removal by coupling simultaneous nitrification-denitrification with anammox to treat actual municipal sewage.
BIORESOURCE TECHNOLOGY
(2021)
Article
Agricultural Engineering
Huihui Cui, Liang Zhang, Qiong Zhang, Xiyao Li, Yu Huang, Yongzhen Peng
Summary: The study developed an innovative partial nitrification-anammox and endogenous partial denitrificationanammox process for efficient treatment of real municipal wastewater with a C/N ratio below 3.2. The nitrogen removal mechanism analysis revealed the importance of anammox bacteria and endogenous denitrifying bacteria in biofilms and suspended sludge for improving nitrogen removal efficiency. Overall, the combined PN/A and EPD/A process proved to be a reliable and efficient alternative for mainstream anammox processes.
BIORESOURCE TECHNOLOGY
(2021)
Article
Agricultural Engineering
Shuai Li, Jialin Li, Shenhua Yang, Qiong Zhang, Xiyao Li, Liang Zhang, Yongzhen Peng
Summary: This study developed a novel strategy to achieve partial nitrification by selectively enriching ammonium oxidizing bacteria without the need for additional chemical agents. By controlling aeration time, the study successfully eliminated AOB and NOB, while maintaining high nitrite accumulation rates in effluent suitable for mainstream wastewater anammox.
BIORESOURCE TECHNOLOGY
(2021)
Article
Agricultural Engineering
Yujie Chen, Gaoxuefeng Feng, Guangze Guo, Zibin Luo, Chao Rong, Tianjie Wang, Yan Guo, Yu-You Li
Summary: The one-stage PNA process with hydroxyapatite-enhanced granules achieved high biomass retention and stable nitrogen and COD removal from wastewater at a low hydraulic retention time.
BIORESOURCE TECHNOLOGY
(2022)
Article
Agricultural Engineering
Fengyuan Zhang, Quan Feng, Ying Chen, Xiaoshuang Shi, Kang Qin, Mingyi Lu, Fan Qin, Shanfei Fu, Rongbo Guo
Summary: Magnetic microparticles can promote nitrification and denitrification in wastewater treatment, facilitate EPS production, and act as a pH buffer in aerobic conditions, thus enhancing nitrogen removal efficiency.
BIORESOURCE TECHNOLOGY
(2022)
Article
Engineering, Environmental
Hao Su, Yukun Deng, Jiejun Zhao, Chen Lai, Longwen Xiao, Shengliang Li, Jianwei Zhao, Qiang Luo, Dachao Zhang, Bingyan Dong
Summary: A novel three-stage PD/PN/Anammox system was established, which showed low oxygen and COD consumption, and better removal efficiency for ammonia nitrogen and total nitrogen.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Engineering, Environmental
Masuduz Zaman, Ahmed Ahmed, Domenico Santoro, John Walton, George Nakhla
Summary: This study investigated the use of hydrogen peroxide to achieve partial nitrification in municipal wastewater treatment. The study was conducted in bench-scale and pilot-scale sequencing batch reactor systems using primary effluent as feed. Hydrogen peroxide served as an inhibitor for nitrifying microorganisms and a supplemental oxygen source. The results showed that a concentration of 50 mg/L and above significantly reduced ammonia removal, indicating a significant impact on both ammonia oxidizing bacteria (AOB) and nitrite oxidizing bacteria (NOB). After an acclimatization period, complete nitrification was observed with nitrite accumulation in the effluent, indicating a greater impact on NOBs than AOBs. The study also found that peroxide dosing resulted in energy savings and reducing the dissolved oxygen (DO) further increased energy savings. Therefore, the proposed approach is an efficient method for aeration energy savings in wastewater treatment plants.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Agricultural Engineering
Bin Ma, Yanbing Liang, Yujian Zhang, Yan Wei
Summary: A partial-nitrification/anammox and endogenous partial-denitrification/anammox (PN/A-EPD/A) process was developed in a sequential batch biofilm reactor (SBBR) to achieve advanced nitrogen removal from low-carbon wastewater. The effluent total nitrogen (TN) reached 3.29 mg/L when the influent COD/TN and the TN were 2.86 and 59.59 mg/L, respectively. The stable PN/A-EPD/A process was achieved through four strategies, including treating the inoculated sludge with free nitrous acid, inoculating anammox biofilm, discharging excess activated sludge and residual ammonium at the end of oxic stage. The 16S rRNA high-throughput sequencing results showed the coexistence of anammox bacteria, ammonia oxidizing bacteria, nitrite oxidizing bacteria, denitrifying glycogen accumulating organisms (DGAOs) and denitrifying phosphorus accumulating organisms (DPAOs) in the biofilms, with higher abundance of anammox bacteria in the inner layer and higher abundance of DGAOs and DPAOs in the outer layer.
BIORESOURCE TECHNOLOGY
(2023)
Article
Agricultural Engineering
Hao Jiang, Pei Yang, Zhong Wang, Shang Ren, Jingang Qiu, Haoran Liang, Yongzhen Peng, Xiyao Li, Qiong Zhang
Summary: A partial nitrification sequencing batch reactor was operated to investigate NOB acclimatization in high-ammonia wastewater treatment. Findings showed that NOB adapted to a range of free ammonia concentrations by shifting dominant NOB genus from Nitrospira to Nitrolencea. Additionally, hydroxylamine addition could serve as an emergency measure to alleviate NOB acclimatization during short-term operation.
BIORESOURCE TECHNOLOGY
(2021)
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
Yinong Zhang, Yongzhen Peng, Xinjie Gao, Xiyao Li
Summary: This study used the PNPR technology to treat municipal wastewater, successfully resolving the conflict between nitrification and phosphorus removal and achieving bio-enhanced phosphorus removal and recovery. The study also found that the phosphorus removal and recovery process can improve the activity of AOB.
BIORESOURCE TECHNOLOGY
(2022)
Article
Environmental Sciences
Chenyang Ma, Wei Zeng, Haohao Miao, Shuangshuang Li, Yongzhen Peng
Summary: This study finds that the addition of zeolite powder enhances the competition between anammox bacteria and nitrite in the SPDA process, resulting in improved nitrogen removal. Zeolite powder enrichment promotes various metabolic pathways and improves particle characteristics, leading to enhanced nitrogen removal efficiency. The high ammonia concentration enriched by zeolite powder also positively affects anammox activity.
ENVIRONMENTAL RESEARCH
(2023)
Article
Agricultural Engineering
Junkai Zhao, Jianqiang Zhao, Shuting Xie, Shuhan Lei
Summary: The study found that the addition of hydroxylamine can promote the accumulation of nitrite in a complete nitrification reactor, leading to partial nitrification, but the process will gradually disappear after stopping the hydroxylamine addition. Analysis of the microbial community revealed that the inhibition of Nitrospira is significant and reversible, possibly related to NO toxicity.
BIORESOURCE TECHNOLOGY
(2021)
Article
Environmental Sciences
Tingting Teng, Jidong Liang, Jinwei Zhu, Pengkang Jin, Dayi Zhang
Summary: Bioaugmentation aided by biosurfactant is an effective method for removing pyrene from contaminated sites. This process accelerates pyrene degradation and increases the diversity of active pyrene-degrading bacteria.
ENVIRONMENTAL POLLUTION
(2022)
Article
Engineering, Environmental
Yi Rong, Yang Zhang, Zenghui Sun, Zhe Liu, Xin Jin, Pengkang Jin
Summary: Rural wastewater treatment is an important issue in China. This study investigated the performance of rural wastewater treatment plants in Shaanxi and found that the intermittent flow of rural sewage results in poor pollutant removal. The study also developed an optimal operation strategy using an A2/O bioreactor to improve the efficiency and economic benefits of rural wastewater treatment plants.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Gaoyuan Shang, Kai Cui, Wenfang Cai, Xiaona Hu, Pengkang Jin, Kun Guo
Summary: A novel 20 L electrochemical continuous stirred-tank reactor (E-CSTR) was reported for methane production from CO2. The reactor showed high methane production rates, coulombic efficiency, and excellent robustness, indicating great potential for scaling up and practical application.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Green & Sustainable Science & Technology
Xuan Shi, Wei Liu, Dongwei Xu, Yuxuan Hou, Bo Ren, Xin Jin, Xiaochang C. Wang, Pengkang Jin
Summary: In this study, 18 high-quality draft genomes from sewer biofilms were analyzed, revealing the presence of genes involved in both methane and sulfide production. These genomes formed symbiotic systems that promote the generation of methane and sulfide, as well as another biological system with multiple functional aggregates. These findings improve the understanding of toxic gas emissions in sewers and provide a theoretical foundation for gas suppression studies.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Environmental Sciences
Xue Bai, Juan Shi, Lu Xu, Xin Jin, Xuan Shi, Pengkang Jin
Summary: A ternary catalyst, Fe-g-C3N4/rGO, is used to activate peroxymonosulfate (PMS) for effective contaminant mineralization. The catalyst exhibits high efficiency, wide pH adaptability, and stability, making it a promising approach for practical wastewater purification.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Chemical
Yao Li, Haoran Xin, Yukai Zong, Xin Jin, Yadong Wang, Yabo Shang, Pengkang Jin, Xiaochang Wang
Summary: A novel nucleation-induced crystallization process (NICP) is proposed for the simultaneous removal of organics and hardness ions in industrial effluents. The pre-dosed seed provides reaction sites for the lattice ions, inducing Ca2+/Mg2+ ions to adhere to the seed surface. Organics attach to the seed surface through coprecipitation and surface complexation. Hydraulic regulation accelerates crystal growth and increases nucleating pellet size. The multi-stage NICP improves removal efficiency, with the 3rd-stage achieving 65.63% removal rate for total hardness and 42.95% removal rate for chemical oxygen demand (COD).
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Review
Engineering, Environmental
Yaohuan Gao, Xuan Shi, Xin Jin, Xiaochang C. Wang, Pengkang Jin
Summary: In-sewer physio-biochemical processes cause variations in wastewater quality during conveyance, affecting the influent to wastewater treatment plant and microbial community in biological treatment units. Contaminants in sewer deposits can be released during combined sewer overflows, posing challenges to treatment facilities and urban water quality. Studies have shown that biochemical reactions are organized in deposits and sewage, following redox potential and degradation sequence. Future research should focus on topics such as FOG deposits, transport of contaminants in sewer atmosphere, nonconventional contaminants, and wastewater quality variation during biofilm rehabilitation.
Article
Engineering, Environmental
Xin Jin, Mengwen Liu, Yukai Zong, Shiyi Hu, Yao Li, Lu Xu, Xue Bai, Xuan Shi, Pengkang Jin, Jina Song, Xiaochang C. Wang
Summary: The pre-ozonation coagulation process has a limited range of ozone dosages for effective removal of dissolved organic matter (DOC) due to the risk of over-oxidation. In contrast, the hybrid ozonation-coagulation (HOC) process not only inhibits over-oxidation, but also improves DOC removal efficiency at a wider range of ozone dosages and different initial pH conditions. The HOC process also outperforms pre-ozonation coagulation in terms of DOC removal efficiency.
Article
Chemistry, Physical
Gen Wang, Ke Wang, Zhuoyue Liu, Youyou Feng, Shengjiong Yang, Yaqiong Su, Xufang Qian, Pengkang Jin, Jing Wei
Summary: This study designs NiO nanospheres with hollow multi-shelled structure as a nanoreactor for the activation of peroxydisulfate to improve decomposition efficiency. The 3-shelled NiO HoMS exhibits enhanced kinetic rate (0.08 min-1) and mineralization degree (79.2%) compared to the 2-shelled NiO HoMS (0.04 min-1, 50%) and NiO nanoparticles (0.01 min-1, 29.8%) for the degradation of bis-phenol A. The hollow multi-shelled structure increases the accessibility of oxygen vacancy and enriches the local concentration of reactants, contributing to the enhanced catalytic efficiency.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Green & Sustainable Science & Technology
Keqian Li, Wuang Ren, Qianle Wang, Lu Xu, Xuan Shi, Xue Bai, Xin Jin, Xiaochang C. Wang, Pengkang Jin
Summary: This study investigated the discharge characteristics of rural greywater and proposed the use of a novel ecological seepage well (ESW) for on-site treatment. The ESW achieved high removal efficiencies of COD, TP, TN, and NH4+-N, resulting in effluent that met the Chinese standard for irrigation water quality. The study also revealed the mechanism of pollutant removal by ESW, demonstrating the potential for effective treatment of rural sewage.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Biochemistry & Molecular Biology
Zhiyao Zhang, Zhaolin Li, Xue Bai, Juan Shi, Min Hu, Jin Chai, Keqian Li, Pengkang Jin
Summary: In this study, a catalyst-free alizarin green (AG) self-activating PMS catalytic system was constructed based on the photosensitization properties of dye, which achieved efficient degradation of the dye activator. The mechanism was revealed that the photo-excited AG transferred photo-induced electrons to PMS for its activation, generating reactive oxidizing species to degrade the dye pollutants. The self-catalytic system also showed good performance under natural sunlight irradiation, indicating its potential in wastewater treatment.
Article
Engineering, Chemical
Yao Li, Yukai Zong, Xin Jin, Kun Guo, Shiyi Hu, Pengkang Jin, Xiaochang Wang
Summary: This study demonstrated that organics modified by ozonation can be captured in real time by micro-bubble flocs mediated by the interaction among ozone, Al species, and other organics using the hybrid ozonation-coagulation process. The real-time capture strategy during the HOC process can increase organics removal efficiency and broaden the ozone dosing range. The formation of Al-organic complexes with C-O-Al coordination bonds protects the modified organics from further oxidation by ozone.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Environmental
Xin Jin, Keqian Li, Yixiong Wei, Yabo Shang, Lanzhou Xu, Mengwen Liu, Lu Xu, Xue Bai, Xuan Shi, Pengkang Jin, Jina Song, Xiaochang C. Wang
Summary: A novel CM-E-HOC process was proposed for the treatment of polymer-flooding produced water, achieving in situ self-cleaning and higher removal efficiency compared to the CM-EC process. The CM-E-HOC process showed improved coagulation performance due to the increased oxygen-containing functional groups and polymeric Fe species, resulting in better in situ self-cleaning performance and lower filtration resistance.
Article
Engineering, Chemical
Lu Xu, Xiaojia Wei, Yabo Shang, Yuetong Qi, Juan Shi, Keqian Li, Xin Jin, Xue Bai, Xuan Shi, Pengkang Jin
Summary: A facile impregnation-calcination route was proposed for the synthesis of Fe3+-doped TiO2 anchored with FeQDs, with enhanced catalytic performance for the degradation of phenolic pollutants under visible light. The obtained FeQDs/TiO2-x exhibited quasi-full visible light absorption and improved charge separation and interfacial transport capacity. The mechanism of the enhanced photocatalytic activity was elucidated based on material characterization and degradation experiments. The results demonstrated the high potential of FeQDs/TiO2-x for wastewater treatment.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Environmental
Xiurong Zhu, Lei Ge, Wei Yan, Shengjiong Yang, Gen Wang, Delu Miao, Pengkang Jin
Summary: The immobilized CoFe2O4 network showed efficient degradation of sulfa-methoxazole (SMX) with good long-term durability.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Green & Sustainable Science & Technology
Lars odegaard Bentsen, Narada Dilp Warakagoda, Roy Stenbro, Paal Engelstad
Summary: This study investigates uncertainty modeling in wind power forecasting using different parametric and non-parametric methods. Johnson's SU distribution is found to outperform Gaussian distributions in predicting wind power. This research contributes to the literature by introducing Johnson's SU distribution as a candidate for probabilistic wind forecasting.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Xing Liu, Qiuchen Wang, Yunhao Wen, Long Li, Xinfang Zhang, Yi Wang
Summary: This study analyzes the characteristics of process parameters in three lean gas ethane recovery processes and establishes a prediction and multiobjective optimization model for ethane recovery and system energy consumption. A new method for comparing ethane recovery processes for lean gas is proposed, and the addition of extra coolers improves the ethane recovery. The support vector regression model based on grey wolf optimization demonstrates the highest prediction accuracy, and the multiobjective multiverse optimization algorithm shows the best optimization performance and diversity in the solutions.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Cairong Song, Haidong Yang, Xian-Bing Meng, Pan Yang, Jianyang Cai, Hao Bao, Kangkang Xu
Summary: The paper proposes a novel deep learning-based prediction framework, aTCN-LSTM, for accurate cooling load predictions. The framework utilizes a gate-controlled multi-head temporal convolutional network and a sparse probabilistic self-attention mechanism with a bidirectional long short-term memory network to capture both temporal and long-term dependencies in the cooling load sequences. Experimental results demonstrate the effectiveness and superiority of the proposed method, which can serve as an effective guide for HVAC chiller scheduling and demand management initiatives.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Zhe Chen, Xiaojing Li, Xianli Xia, Jizhou Zhang
Summary: This study uses survey data from the Loess Plateau in China to evaluate the impact of social interaction on the adoption of soil and water conservation (SWC) technology by farmers. The study finds that social interaction increases the likelihood of farmers adopting SWC, and internet use moderates this effect. The positive impact of social interaction on SWC adoption is more pronounced for farmers in larger villages and those who join cooperative societies.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Chenghua Zhang, Yunfei Yan, Kaiming Shen, Zongguo Xue, Jingxiang You, Yonghong Wu, Ziqiang He
Summary: This paper reports a novel method that significantly improves combustion performance, including heat transfer enhancement under steady-state conditions and adaptive stable flame regulation under velocity sudden increase.
JOURNAL OF CLEANER PRODUCTION
(2024)