Article
Environmental Sciences
Jinfeng Jiang, Liang Ma, Lianjie Hao, Daoji Wu, Kai Wang
Summary: The study demonstrated that advanced nitrogen removal from landfill leachate can be achieved through SBR and SBBR without the addition of external carbon sources. SBBR showed a 16.7% improvement in nitrogen removal efficiency compared to SBR, attributed to the enhanced simultaneous nitrification and denitrification effect of the biofilm.
Article
Environmental Sciences
Kai Wang, Jinfeng Jiang, Liang Ma, Liwen Zheng, Guangyuan Zhang, Daoji Wu
Summary: In this study, the efficiency of nitrogen removal from pharmaceutical wastewater was improved by treating the wastewater in an ASBR and a modified SBBR. Through the use of SND, deep denitrification of the system was achieved with a shorter running time.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2022)
Article
Agricultural Engineering
Kaiyue Dong, Yanling Qiu, Xiaoxia Wang, Deshuang Yu, Zhengda Yu, Juan Feng, Jimiao Wang, Ruihuan Gu, Ji Zhao
Summary: This study investigated the feasibility of conducting denitrifying phosphorus removal in a biofilm reactor to overcome the limitation of exchanging ammonia/nitrate. The system with both activated sludge (AS) and biofilm achieved a high phosphorus removal efficiency (83.15%), with the AS performing better. The presence of Pseudomonas, Thiothrix, and Candidatus_Competibacter in the biofilm was found to be crucial for denitrification, phosphate transport, and biofilm formation.
BIORESOURCE TECHNOLOGY
(2023)
Article
Engineering, Environmental
Mohini Verma, Shubhrasekhar Chakraborty, Shweta Kumari, Aalok Gupta, Dewanshu Kumar, Jawed Iqbal, J. Rajesh Banu, Arulazhagan Pugazhendi, R. Naresh Kumar
Summary: A laboratory-scale GAC-SBR was used to co-treat landfill leachate and municipal wastewater, and the treatment efficiency was evaluated. Increasing GAC concentration led to better removal of COD and ammonia from leachate. GAC-SBR demonstrated efficient removal of COD and nutrients at a 10-day HRT. Statistically significant differences were observed in the treatments for different leachate:wastewater ratios. Coupled treatment showed potential for co-treatment, but additional physico-chemical processes may be required for further pollutant removal.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Engineering, Chemical
Jinlong Zuo, Junsheng Li, Zhi Xia, Chong Tan
Summary: This study evaluated the properties and pollutant removal ability of aerobic granules cultivated from sludge in low-strength synthetic wastewater under low dissolved oxygen condition. The results showed that the aerobic granules demonstrated high removal efficiency and reduced aeration rate, making them a promising option for wastewater treatment with low energy consumption.
DESALINATION AND WATER TREATMENT
(2021)
Article
Green & Sustainable Science & Technology
Hemant Goyal, Tanishq Tyagi, Prasenjit Mondal
Summary: This study evaluates and compares the environmental impacts of using GAC and GAC-Fe adsorbents for treating arsenic contaminated water. The results showed that chemically treated/impregnated adsorbents not only have fewer environmental emissions, but also reduce treatment costs. GAC-Fe treatment had lower environmental impacts and costs compared to GAC treatment.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Environmental Sciences
Nguyen Hong Dan, Tran Le Luu
Summary: Landfill leachate treatment is crucial, especially in developing countries, and this study found that the CF-SBBR method with different biocarriers effectively removed pollutants. The MB biocarriers showed the highest removal efficiencies for COD, TOC, and NH4+-N, while TN removal efficiency decreased with increasing biocarrier surface area. The study concluded that CF-SBBR is an efficient method for landfill leachate treatment.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Environmental
Ruo-hong Li, Xuechao Guo, Bing Li, Lin Lin, Pu Li, Lei Wen, Jiajin Liang, Xiao-yan Li
Summary: This research developed an innovative strategy to utilize organic pollutants for self-sufficient organic carbon supply in wastewater treatment, enhancing nutrient removal efficiency. The integrated SBR system with CEPS and acidogenic sludge fermentation significantly improved total phosphorus and total nitrogen removal rates, demonstrating cost-effectiveness and potential for upgrading existing wastewater treatment plants.
RESOURCES CONSERVATION AND RECYCLING
(2021)
Article
Engineering, Environmental
Jacklyn Monserate Baldovia-lim, Mark Daniel G. de Luna, Ralf Ruffel M. Abarca, Carl Francis Z. Lacson, Nurak Grisdanurak, Ming-chun Lu
Summary: Anthropogenic activities and industrial processes release large amounts of nickel into the environment, leading to potential risks to public and ecological health. A method called fluidized-bed non-seeded granulation process has been found effective in removing and recovering metals, including nickel. This study focused on precipitating nickel using phosphate and investigated the effects of bi-pH operation, molar ratio, initial nickel concentration, and co-existing chemical compounds. The results showed that bi-pH operation improved the granulation process by generating heterogeneous granulation, while co-existing compounds reduced granulation efficiency due to nickel complexation, ionic competition, and precipitate dissolution.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Ola Svahn, Stefan Borg
Summary: This study focuses on the 4th treatment step in Degeberga WWTP, which uses a full scale GAC filter for the removal of micropollutants. The results show that the sand filter provides effective protection to the carbon filters and biodegradation plays a role in the removal of some micropollutants. The average removal of 24 compounds over three years is 89% in the 4th treatment step. The study suggests that the combination of sand and GAC filters in WWTPs is promising for removing organic micropollutants.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Engineering, Environmental
Jiandong Liu, Xinrong Fu, Rongfang Yuan, Zhongbing Chen, Beihai Zhou, Huilun Chen
Summary: This study investigated the effect of alkali pre-treated corncob as an external carbon source on nitrogen removal and determined the denitrification performance using SBBR. The results showed that alkali pre-treated corncob had a higher carbon release capacity and excellent denitrification rate, effectively improving the denitrification performance of low C/N ratio wastewater.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2022)
Article
Engineering, Environmental
Yin-Ping Hou, Dang-Cong Peng, An-Long Zhang, Xian-Bao Wang, Li-Ying Pei
Summary: This study successfully cultivated anaerobic granular sludge with superior physicochemical characteristics, demonstrating a unique clustered microbial community structure which contributed to enhanced digestion performance in the ASBR reactor. The large substrate concentration gradient derived from the feast-famine alternation regime was a major factor influencing the microbial distribution structure within the granules.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Engineering, Environmental
Chun-shuang Zhou, Ji-wen Wu, Wan-li Ma, Bing-feng Liu, De-feng Xing, Shan-shan Yang, Guang-li Cao
Summary: This study investigated the effects of microplastics (MPs) and nanoplastics (NPs) on nitrogen removal by activated sludge. The results showed that NPs had a negative impact on NH4+-N removal efficiency and caused the accumulation of NO3--N and NO2--N. The toxic effects of NPs were reflected by the increasing reactive oxygen species generation and lactate dehydrogenase release. Furthermore, NPs reduced the relative abundance of nitrifiers and denitrifiers, leading to a decrease in nitrogen removal efficiency.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Biochemistry & Molecular Biology
Tae-Hyun Kim, Chihyun Seo, Jaeyoung Seon, Anujin Battulga, Yuhoon Hwang
Summary: Through controlling the weight ratio between Alg and BO, Alg-BO granulation was achieved and its iodide adsorption efficacy for different initial iodide concentrations and contact time values was explored. The results showed that Alg-BO exhibited high adsorption capacity, stability, convenience, and the ability to prevent secondary pollution.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Biotechnology & Applied Microbiology
Thi-Minh-Tam Le, Tran-Nguyen-Sang Truong, Phuoc-Dan Nguyen, Quang-Do-Thanh Le, Quoc-Viet Tran, Thanh-Tho Le, Quoc-Hung Nguyen, Thuy-Chung Kieu-Le, Emilie Strady
Summary: Wastewater treatment plants in Vietnam are significant sources of microplastics in receiving waters, with varying abundance, removal efficiency, and daily load. The changes in microplastics abundance, morphology, and removal efficiency were observed after different treatment stages.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2023)
Article
Green & Sustainable Science & Technology
Mohini Singh, Rajeev K. Srivastava
ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY
(2016)
Article
Green & Sustainable Science & Technology
Mohini Singh, Mohd. Rayaz, Arti Rao
Summary: This study explores the potential of Prosopis cineraria leaf powder (PCLP) as a biosorbent for removing heavy metal ions (HMIs) from aqueous solutions. The results demonstrate that PCLP follows Langmuir isotherm for adsorption and pseudo-second-order (PSO) model for kinetics. Nonlinear regression analysis shows better fitting for equilibrium modeling, while the PSO model performs comparably to linear analysis for kinetics. PCLP shows promise as an environmentally friendly and cost-effective biosorbent for removing toxic HMIs.
ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY
(2023)
