Article
Environmental Sciences
Ya-nan Luan, Yue Yin, Gongfa Chang, Feng Zhang, Changqing Liu
Summary: This study investigates the impact of anaerobic duration on phosphorus removal in the reversed AAO process. The results show that the amount of released P and stored PHAs can be controlled by different anaerobic durations, but higher stored PHAs do not guarantee higher P removal efficiency. Additionally, extending the anaerobic duration has a significant effect on microbial activity, and the highest P removal efficiency is achieved at an anaerobic duration of 4 hours.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Environmental
Ronghua Xu, Fuqiang Fan, Qining Lin, Shasha Yuan, Fangang Meng
Summary: The study found that the sludge community in MBR-C, with higher diversity and deterministic assembly, had better phosphorus removal compared to MBR-T. Additionally, MBR-C had higher abundance of polyphosphate accumulating organisms and hydrolytic/fermentative bacteria but lower abundance of glycogen-accumulating organisms.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Agricultural Engineering
Xiaochuan Dong, Ziwen Zhao, Xiaojing Yang, Zhongfang Lei, Kazuya Shimizu, Zhenya Zhang, Duu-Jong Lee
Summary: The study found that mature algal-bacterial AGS could maintain good settleability even when wastewater salinity increased to 3%, but with less filamentous structures in the sludge. While removal of organics and nutrients decreased under high salinity conditions, they could recover quickly once the salinity disturbance was removed.
BIORESOURCE TECHNOLOGY
(2021)
Article
Engineering, Environmental
Ke Liu, Sha Wu, Jing Chen, Chen Chen, Hong Wang, Enzhe Yang, Chengfeng Zhang, Min Xie, Hong Chen
Summary: This study investigated the performance recovery mechanism of an anaerobic ammonia oxidation (anammox) process after deterioration. The results demonstrated that adjusting the influent TN concentration and HRT can effectively restore the nitrogen removal performance. Additionally, the microbial diversity also changed during the recovery process.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Environmental Sciences
Elham Ramin, Xavier Flores-Alsina, Chris Gaszynski, Theo Harding, David Ikumi, Chris Brouckaert, Barbara Brouckaert, David Modiri, Resul Al, Gurkan Sin, Krist Gernaey
Summary: This study evaluated four different wastewater treatment system configurations based on a model, finding that UCT and UCTM are more suitable for phosphorus removal, but denitrification is incomplete. Different configurations affect how influent uncertainty is reflected in effluent quality and cost performance model predictions, as well as the parameter rankings for effluent phosphate, sludge disposal, and methane production.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Agricultural Engineering
Qianwen Sui, Fei Di, Junya Zhang, Hui Gong, Li'an Jiang, Yuansong Wei, Jie Liu, Jia Lin
Summary: This study confirmed the feasibility of anaerobic ammonia oxidation as a tertiary nitrogen removal process, and identified the main nitrogen removal pathway using anammox in an upflow fixed-bed reactor. It also investigated the cooperation mechanism among AOA, AOB, and AnAOB in the inner-layer of biofilm in the reactor.
BIORESOURCE TECHNOLOGY
(2021)
Article
Engineering, Environmental
Carlos Mendes, Luciano Matos Queiroz, Karla Esquerre, Cesar Huilinir
Summary: Mathematical modeling is used to clarify the simultaneous removal of organic matter and nitrogen from fish processing industry wastewater. The study applies the Anaerobic Digestion Model No. 1 (ADM1) to a single stage anaerobic/anoxic reactor fed with a mix of synthetic substrate and protein-rich salmon processing industry wastewater. The model is calibrated and validated using experimental data, and sensitive parameters are estimated to optimize the model's performance. The results show good agreement with experimental data and the model accurately predicts the effluent flows.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Agricultural Engineering
Kun Wang, Chuanting Zhou, Hua Zhou, Ming Jiang, Guang Chen, Cong Wang, Zhenjian Zhang, Xiaodan Zhao, Lu-Man Jiang, Zhen Zhou
Summary: A comparative study was conducted on the AAO process and its two upgrading processes, five-stage Bardenpho and AAO + MBBR, using long-term operation data of six full-scale wastewater treatment plants. The three processes showed good performance in COD and phosphorus removal. The Bardenpho process was advantageous in nitrogen removal, while the AAO + MBBR had higher microbial richness and diversity. Both processes had specific bacteria enrichment and were suitable for different upgrading purposes.
BIORESOURCE TECHNOLOGY
(2023)
Article
Environmental Sciences
Omari Bakari, Karoli N. Njau, Chicgoua Noubactep
Summary: Results from various studies indicate that metallic iron (Fe-0) materials can enhance the removal of organics, phosphorus, and nitrogen from polluted water in anaerobic digestion systems. This research characterizes the effects of different types and dosages of Fe-0 in anaerobic digestion systems for simultaneous removal of organics and nutrients. The results show that an optimum dosage of 10 g/L scrap iron (SI) can achieve high removal efficiencies for COD and nutrients, while steel wool (SW) performs better than SI. However, the removal efficiency for (NO3- + NH4+) was the lowest among the pollutants studied.
Article
Environmental Sciences
Santo Fabio Corsino, Michele Carabillo, Alida Cosenza, Federica De Marines, Daniele Di Trapani, Francesco Traina, Michele Torregrossa, Gaspare Viviani
Summary: Insights into the mechanisms of excess sludge minimization in an oxic-settling-anaerobic (OSA) process were provided. Two parallel systems, a conventional activated sludge (CAS) system as control and an OSA system with pre-denitrification, were studied. The results showed that the OSA process had lower excess sludge production (12-41%) compared to the CAS system. The highest sludge reduction yield (40%) was achieved with scheme B and a hydraulic retention time (HRT) of 12 hours in the anaerobic reactor. Scheme A led to cell lysis and EPS destruction, while scheme B enabled maintenance and uncoupling metabolism, resulting in higher sludge reduction yield without compromising effluent quality.
Article
Environmental Sciences
Hongxu Bao, Min Liu, Xianhui Li, Nanqi Ren, Jianzheng Li
Summary: A packed-bed anaerobic-aerobic reactor (PBAOR) was constructed to treat manure-free piggery wastewater. The reactor achieved stable removal rates of COD, NH4(+)-N, and TN above 85.7%, 98.2%, and 85.8%, respectively. Additionally, the reactor showed effective removal of veterinary antibiotics, except for fluoroquinolones.
ENVIRONMENTAL TECHNOLOGY
(2023)
Article
Environmental Sciences
Siyu Wang, Ziao Gong, Yunchen Wang, Fangkui Cheng, Xiwu Lu
Summary: The biggest problem in treating rural domestic sewage is the high investment and operating costs of existing treatment projects. To address this issue, cost-effective, low-consuming, resource-recovering, and easy-maintenance technologies are urgently needed. In this study, a novel anoxic-aerobic system combined with integrated vertical-flow constructed wetland (IVFCW) with source separation was proposed. The system achieved high removal rates of COD (91.58 +/- 1.86%), NH4+-N (96.17 +/- 0.92%), TN (82.71 +/- 3.92%), and TP (92.28 +/- 2.78%) under optimal operating parameters. Compared to other treatment technologies, this combined bio-ecological system showed higher simultaneous removal of organics and nutrients, making it a promising and competitive alternative for rural sewage treatment.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
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
Engineering, Environmental
Xinjie Gao, Xiaofei Xue, Lingyun Li, Yongzhen Peng, Xiaoyan Yao, Jianxing Zhang, Weihang Liu
Summary: This study successfully established a pilot-scale AOA system with a processing capacity of 100 m3/d, achieving efficient nitrogen and phosphorus removal under carbon limited conditions, making it suitable for application in wastewater treatment plants.
Article
Environmental Sciences
Yawen Sun, Qiong Zhang, Xiyao Li, Yanhui Chen, Yongzhen Peng
Summary: Denitrifying phosphorus removal (DPR) technology is an effective approach for simultaneous removal of nitrogen and phosphorus in wastewater. A novel AAO-BCO system was used for actual sewage treatment, showing high efficiency of TIN and PO43--P removal at a certain COD/N ratio. Superior DPR performance was observed at a specific COD/N ratio, indicating the importance of optimizing denitrification and anoxic P uptake efficiency in DPR processes.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Elizabeth Alvarez-Chavez, Stephane Godbout, Mylene Genereux, Caroline Cote, Alain N. Rousseau, Sebastien Fournel
Summary: This study evaluated the effect of alternative filtering materials and bed aeration on the retention of nutrients and fecal bacteria in woodchip bedded stand-off pads for cows. The results showed that the alternative biofilters were more efficient in removing COD, SS, TN, and NO3-N, while conventional biofilters were more efficient for PO4-P removal. Aeration did not have a significant effect under the tested temperature conditions.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Yike Zhang, Zengyi Ma, Zhuoting Fang, Yuandong Qian, Zhiping Huang, Yilong Ye, Jianhua Yan
Summary: This study investigates the application of oxygen enrichment melting technology in the melting of municipal solid waste incineration fly ash. The results demonstrate that oxygen enrichment technology can reduce energy consumption and operating costs, as well as decrease pollution emissions.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Liangang Xiao, Mingkai Leng, Philip Greenwood, Rongqin Zhao, Zhixiang Xie, Zengtao You, Junguo Liu
Summary: This study investigates the effects of grazing exclusion on soil organic carbon (SOC) accumulation and vegetation recovery. It finds that grazing exclusion can increase the potential for SOC accumulation, and higher annual precipitation is positively correlated with SOC accumulation.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Beatrice Cantoni, Jessica Ianes, Beatrice Bertolo, Selena Ziccardi, Francesco Maffini, Manuela Antonelli
Summary: This study evaluates the performance of ozonation and adsorption as in-series processes compared to standalone processes for the removal of Contaminants of Emerging Concern (CECs) in drinking water. The combination of both processes proves to be more effective than adsorption and ozonation alone. Ozonation improves the adsorption performance of poorly-oxidizable CECs but worsens that of well-oxidizable compounds. This research highlights the importance of considering both processes in the removal of CECs in drinking water treatment plants.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Dan Li, Bingjun Liu, Yang Lu, Jianyu Fu
Summary: A new Standardized compound Drought and Saltwater intrusion Index (SDSI) was developed to detect changes in the severity of CDSEs in six estuaries. The study found that saltwater intrusion plays a dominant role in influencing SDSI severity, and CDSEs vary in frequency, duration and severity among different estuaries.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Yong-Qiang Li, Rui Sun, Chong-Miao Zhang, Zi-Xuan Liu, Rui-tao Chen, Jian Zhao, Hua-dong Gu, Huan-Cai Yin
Summary: In this study, an electron beam excitation multi-wavelength ultraviolet (EBE-MW-UV) system was established and found to have significantly higher microbial inactivation effects compared to single-wavelength UV-LEDs in water. Mechanism analysis revealed that EBE-MW-UV damaged microbial DNA and proteins, and generated additional reactive oxygen species, leading to microbial inactivation.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Kaili Ma, Xinxin Han, Qiujuan Li, Yu Kong, Qiaoli Liu, Xu Yan, Yahong Luo, Xiaopin Li, Huiyang Wen, Zhiguo Cao
Summary: This study reveals that the use of a tryptophan-degrading microbial consortium (TDC) can enhance the hydrolysis efficiency of waste activated sludge (WAS), increasing the yield and quality of short chain fatty acids (SCFAs) and improving the solubilization and release of organic substances from WAS.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Ling Xiong, Rui Li
Summary: Incorporating Ecosystem Service Value (ESV) into land use planning can provide informed land management decisions. This study evaluates the ESV of Guizhou Province in China's karst region. The results show an increase in total ESV over the past two decades due to ecological restoration projects.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
M. Geetha Jenifel
Summary: This article discusses the importance of water and the pollution of freshwater resources, and introduces the use of machine learning models and blockchain technology to predict and protect water quality.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Stanslaus Terengia Materu, Taotao Chen, Chang Liu, Daocai Chi, Meng Jun
Summary: The study showed that H2SO4-modified biochar can reduce P leaching, increase soil available P, and enhance plant P uptake in alternate wetting and drying irrigation systems. Biochar additions B20A and IAWDB20A-M were effective in improving yield, reducing P leaching, and increasing APB.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Amir Nouri, Ali Akbar Zinatizadeh, Sirus Zinadini, Mark Van Loosdrecht
Summary: This study focuses on the development of an air-lift bio-electrochemical reactor (ALBER) with a continuous feeding regime to enhance nitrogen removal from synthetic wastewater. The effect of temperature, hydraulic retention time (HRT), N -NH+4 /TN ratio, and current density on the reactor performance was investigated, and the ALBER achieved a maximum TN removal of 73%. The results suggest that the ALBER has potential for treating industrial wastewater at low temperatures.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Peifang Wang, Guoxiang You, Yang Gao, Juan Chen, Xun Wang, Chao Wang
Summary: This study investigated the ecological processes of microbial communities and N- and P-transformation processes in multistage agricultural drainage ditches. The results showed that the microbial communities were co-shaped by agricultural practices and ditch size, which further governed the N and P removal performance.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Xiaofeng Niu, Huan Wang, Tao Wang, Peiyu Zhang, Huan Zhang, Hongxia Wang, Xianghong Kong, Songguang Xie, Jun Xu
Summary: Microorganisms play a critical role in maintaining ecosystem balance, and environmental stressors can affect the assembly processes of microbial communities. The study found that different stressors have opposite effects on microbial community assembly in water and sediment, and warming has different influences compared to herbicides and nutrients.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Yuqing Tan, Qiming Cheng, Fengwei Lyu, Fei Liu, Linhao Liu, Yihong Su, Shaochun Yuan, Wenyu Xiao, Zhen Liu, Yao Chen
Summary: The exacerbation of global warming, extreme weather events, and rapid urbanization have led to increased flooding in urban areas. China has adopted sponge city as an efficient means of preventing and controlling urban floods. Using a SWMM-FVCOM model, the hydrological reduction and control effect of sponge city construction (SPCC) within a university campus were evaluated. The study found that implementing SPCC effectively mitigates surface runoff and reduces the severity of urban flooding. However, the efficacy of runoff control decreases with longer rainfall return periods.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Zhonghan Chen, Qiuyan Li, Shibo Yan, Juan Xu, Qiaoyun Lin, Zhuangming Zhao, Ziying He
Summary: Tidal rivers are important biochemical reaction channels, receiving carbon from wastewater and agricultural drains, affecting CO2 emissions. Through modeling and data analysis, researchers explored carbon distribution, emissions, and greenhouse effects, emphasizing the potential of river management to change global CO2 emissions under climate change.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)