Article
Green & Sustainable Science & Technology
Sadiye Kosar, Onur Isik, Yasemin Akdag, Hazal Gulhan, Ismail Koyuncu, Hale Ozgun, Mustafa Evren Ersahin
Summary: Characteristics of seed sludge are crucial for the granulation and treatment performance of aerobic granular sludge process. Different types of seed sludge can affect the size of granules and the efficiency of nitrogen and phosphorus removal in the sludge.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Environmental Sciences
Sadiye Kosar, Onur Isik, Busra Cicekalan, Hazal Gulhan, Ece Sagir Kurt, Ezgi Atli, Safak Basa, Hale Ozgun, Ismail Koyuncu, Mark C. M. van Loosdrecht, Mustafa Evren Ersahin
Summary: This study investigated the impact of settling prior to the aerobic granular sludge (AGS) process on granulation and treatment performance. The results showed that granulation was achieved in both stages, with over 92% COD removal efficiency in each stage. However, settling prior to the AGS process led to a decrease in nitrogen and phosphorus removal efficiencies.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Environmental Sciences
Ling Lin, Shuangshuang Chen, Yi Hou, Lirong Lei
Summary: This study systematically investigated the formation process and mechanism of aerobic granular sludge in an SBBGR and successfully cultivated aerobic granular sludge with good performance.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Agricultural Engineering
Qiulai He, Zhiyi Xie, Zhidong Fu, Meng Wang, Peng Xu, Jian Yu, Jingwei Ma, Shuxian Gao, Li Chen, Wei Zhang, Jianyang Song, Hongyu Wang
Summary: This study compared the tolerance ability of incomplete and complete granulation sludge to oxytetracycline (OTC), finding that incomplete granulation sludge showed better denitrification performance and resistance, while complete granulation sludge suffered a permanent collapse under high OTC concentrations.
BIORESOURCE TECHNOLOGY
(2021)
Review
Engineering, Environmental
Xushen Han, Yan Jin, Jianguo Yu
Summary: This review summarizes the main strategies for accelerating the formation of aerobic granular sludge (AGS) and focuses on the bioaugmentation technology. The bioaugmentation technology is divided into two categories: flocculating bacteria and filamentous fungus, which includes pure fungal pellets and pellet-bacteria system. The review also discusses the adsorption of various microorganisms by pure-culture fungal pellets in long-term operation. A comparison analysis of different bioaugmentation technologies for rapid AGS cultivation is provided, along with prospects for future research.
CHEMICAL ENGINEERING JOURNAL
(2022)
Review
Environmental Sciences
Chunli Wan, Liya Fu, Zhengwen Li, Xiang Liu, Lin Lin, Changyong Wu
Summary: This paper comprehensively reviews the research on AGS over the past two decades, including culture conditions, granulation mechanisms, metabolic and structural stability, storage, and diverse applications.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Engineering, Environmental
Vicente Elicio P. S. G. da Silva, Silvio Luiz de Sousa Rollemberg, Andre Bezerra dos Santos
Summary: The study evaluated the impact of different feeding strategies on the performance and operational stability of AGS systems treating high-strength ammonium concentrations. Results showed that distributing substrate throughout the cycle minimized stability issues, biomass retention, and nitrite accumulation, while achieving better total phosphorus and total nitrogen removal rates.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Environmental Sciences
Xiaoying Zheng, Huijie Zhang, Zhi Xu, Tao Lin, Shanshan Yang, Zhilin Zhao, Zongshuo Han, Chao Zhou
Summary: The study found that the widespread use of perfluorooctanoic acid (PFOA) has led to its frequent detection in wastewater. In short-term experiments, low concentrations of PFOA had little impact on aerobic granular sludge (AGS), while high concentrations significantly damaged the key enzyme activities of AGS, leading to a decrease in nutrient removal efficiency. In long-term experiments, through operation strategy adjustments and self-regulation, the key enzyme activities of AGS were recovered, but the long-term adverse effects of high concentrations of PFOA on AGS were still difficult to alleviate.
Article
Environmental Sciences
Sadiye Kosar, Onur Isik, Busra Cicekalan, Hazal Gulhan, Seyma Cingoz, Mustafa Yoruk, Hale Ozgun, Ismail Koyuncu, Mark C. M. van Loosdrecht, Mustafa Evren Ersahin
Summary: Achieving a neutral/positive energy balance without compromising discharge standards is a key goal in wastewater treatment plants. This study explores the coupling of high-rate activated sludge (HRAS) process with aerobic granular sludge (AGS) process as an energy-efficient pre-treatment option. The results show that feeding the AGS process with a mixture of HRAS process effluent and raw municipal wastewater can increase energy recovery potential and maintain high effluent quality.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Engineering, Environmental
Zhipeng You, Ji Zhao, Han Xiang, Jimiao Wang, Ruihuan Gu, Yan Zhang, Chuanhao Shen, Deshuang Yu, Xiaoxia Wang
Summary: This study compared two methods for re-granulation of granular sludge and found that shaking with zirconia balls can increase the particle size while maintaining high nitrogen removal efficiency, while stirring with a blender can decrease the nitrogen removal efficiency but increase the abundance of indicator microorganisms.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Review
Biotechnology & Applied Microbiology
Jin-Lei Yan, You-Wei Cui, Ji-Lin Huang
Summary: This review highlights the importance of efficient start-up, cultivation, and maintenance of aerobic granular sludge (AGS) in continuous flow reactors for its full-scale application in wastewater treatment plants. Significant progress has been made in recent decades in the configuration of CFR for in-situ granulation of aerobic sludge. The innovation of continuous flow configuration is essential for the future application of AGS in mainstream WWTPs.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2021)
Article
Engineering, Environmental
Bao Nguyen Quoc, Stephany Wei, Maxwell Armenta, Robert Bucher, Pardi Sukapanpotharam, David A. Stahl, H. David Stensel, Mari-Karoliina H. Winkler
Summary: The study investigated the relationship between ammonia oxidation rate, nitrifiers population, and modelled aerobic zone volume in different granule sizes of aerobic granular sludge. Results showed that smaller granules had higher specific ammonia oxidation rates and amoA gene copy numbers per unit VSS but lower per unit surface area compared to larger granules. Additionally, aerobic granular sludge reactors with the same average granule diameter may have different granule size fractions and nitrification rates.
Review
Environmental Sciences
Shuli Liu, Miao Zhou, Glen T. Daigger, Jianping Huang, Gangfu Song
Summary: The high-efficiency and economic benefits of aerobic granular sludge (AGS) wastewater treatment have made it increasingly popular among academics and industrial players. AGS process can recycle high value-added biomaterials and remove pollutants from wastewater. This review comprehensively summarizes the effects of key operation parameters on AGS formation and structural stability, discusses the degradable metabolism of pollutants and microbial diversity in AGS wastewater treatment, and proposes recent attempts to produce high value-added biomaterials from AGS. It aims to provide a reference for further research on AGS process and offer a new alternative for wastewater treatment recycling.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Agricultural Engineering
Mingyue Geng, Shijie You, Haijuan Guo, Fang Ma, Xiao Xiao, Jinna Zhang
Summary: The study found that high FPs dosage can help maintain the morphological integrity and stable bioactivity of AGS, while also improving the efficiency of nutrient removal. Analysis of the microbial community showed that 60% FPs dosage enriched functional bacteria, contributing to the stability of AGS.
BIORESOURCE TECHNOLOGY
(2021)
Article
Environmental Sciences
Fei Han, Mengru Zhang, Zhe Liu, Yufei Han, Qian Li, Weizhi Zhou
Summary: Adding granular activated carbon can accelerate the granulation process and enhance the stability of halophilic aerobic granular sludge. The GAC-addition system exhibits better NH4+-N removal performance at lower temperatures. Compared to the control system, the abundance of almost all nitrogen metabolism-related genes is higher in the GAC-addition system.
