Characteristics of Nitrogen Removal from an Integrated Fixed-Film Activated Sludge (IFAS) System and the Relationship Between Activated Sludge and Biofilm Interactions

被引:0
|
作者
Tuo, Zishuo [1 ,2 ]
Bai, Long [1 ,2 ]
Zhang, Baoping [1 ,2 ]
Jing, Shuangyi [1 ,2 ]
Li, Chenxi [1 ,2 ]
Tang, Shike [1 ,2 ]
机构
[1] Inner Mongolia Univ Sci & Technol, Sch Energy & Environm, Baotou 014010, Peoples R China
[2] Collaborat Innovat Ctr Autonomous Reg Ecol Protect, Baotou 014010, Peoples R China
关键词
modified three-dimensional elastic filler (MTEF); integrated fixed-film activated sludge (IFAS); activated sludge-biofilm interactions; nitrogen removal performance; high-throughput sequencing; NITRIFICATION; MBBR;
D O I
10.3390/w16213040
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
In order to investigate the enhancement mechanism of modified three-dimensional elastic filler (MTEF) on the nitrogen removal performance of the integrated fixed-film activated sludge (IFAS) process, and to clarify the interactions between competition and synergy between activated sludge and biofilm in the IFAS system, an IFAS reactor (T2) filled with MTEF was employed for the study, while a sequencing batch reactor activated sludge process (SBR) reactor (T1) was utilized for comparison. IFAS and SBR reactors were operated over an extended period at ambient temperature to assess the enhancement of pollutant removal performance with the addition of the filler to investigate the competitive dynamics between activated sludge and biofilm under varying influent water qualities (C/N, N/P, and organic loading), and to analyze the synergistic relationship between activated sludge and biofilm at the microbial level using high-throughput sequencing technology. The results demonstrate that throughout the entire operational phase, reactor T2 exhibited superior pollutant removal efficiency. Compared to reactor T1, reactor T2 achieved an average increase in the removal rates of COD, ammonia nitrogen, and total nitrogen by 13.07%, 12.26%, and 28.96%, respectively. The findings on the competitive dynamics between activated sludge and biofilm indicate that the nitrification volumetric load of the IFAS system is significantly higher than that of a pure activated sludge system, suggesting that the IFAS system possesses enhanced nitrification capabilities. Furthermore, when dealing with wastewater characterized by low C/N ratios and high phosphorus pollution, or under substantial organic loads, the biofilm holds a competitive edge and the IFAS system exhibits improved stability. High-throughput sequencing data reveal that the microbial community structures in activated sludge and biofilm can influence each other, thereby enabling the IFAS system to effectively enrich denitrification-related functional microbial populations. Additionally, the biofilm has a certain enhancing effect on the expression levels of nitrogen metabolism-related functional genes in the activated sludge phase microorganisms, indicating that, in addition to competitive interactions, there is also a synergistic effect between the biofilm and activated sludge.
引用
收藏
页数:15
相关论文
共 50 条
  • [21] Fungi as a purifying species in an Integrated Fixed Film Activated Sludge (IFAS) Bioreactor as a Biological Nitrogen Reduction System
    Fazelipour, Mansour
    Takdastan, Afshin
    Borghei, Seyed Mehdi
    INTERNATIONAL JOURNAL OF PHARMACEUTICAL RESEARCH AND ALLIED SCIENCES, 2020, 9 (02): : 168 - 176
  • [22] Effects of dissolved oxygen on biological nitrogen removal in Integrated Fixed Film Activated Sludge (IFAS) wastewater treatment process
    Sriwiriyarat, Tongchai
    Ungkurarate, Wiyaporn
    Fongsatitkul, Prayoon
    Chinwetkitvanich, Sopa
    JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART A-TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING, 2008, 43 (05): : 518 - 527
  • [23] Research progress of anaerobic ammonium oxidation (Anammox) process based on integrated fixed-film activated sludge (IFAS)
    Li, Guang
    Yu, Yunyong
    Li, Xingyu
    Jia, Hongsheng
    Ma, Xiaoning
    Opoku, Prince Atta
    ENVIRONMENTAL MICROBIOLOGY REPORTS, 2024, 16 (02):
  • [24] Performance evaluation of the integrated fixed-film activated sludge (IFAS) for industrial wastewater treatment containing ethylene glycol
    Jangi, Z.
    Shoeibi, S.
    INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY, 2024, 21 (06) : 5491 - 5498
  • [25] Application of cigarette filter rods as biofilm carrier in an integrated fixed-film activated sludge reactor
    Sabzali, Ahmad
    Nikaeen, Mahnaz
    Bina, Bijan
    WATER SCIENCE AND TECHNOLOGY, 2013, 67 (08) : 1793 - 1801
  • [26] Performance evaluation of the integrated fixed-film activated sludge (IFAS) for industrial wastewater treatment containing ethylene glycol
    Z. Jangi
    S. Shoeibi
    International Journal of Environmental Science and Technology, 2024, 21 : 5491 - 5498
  • [27] Wastewater ammonia removal using an integrated fixed-film activated sludge-sequencing batch biofilm reactor (IFAS-SBR): Comparison of suspended flocs and attached biofilm
    Shao, Yanxi
    Shi, Yijing
    Mohammed, Abdul
    Liu, Yang
    INTERNATIONAL BIODETERIORATION & BIODEGRADATION, 2017, 116 : 38 - 47
  • [28] Upgrading integrated fixed-biofilm activated sludge (IFAS) system into separated two-sludge denitrifying phosphorus removal system: Nutrient removal and microbial structure
    Zhao, Weihua
    Bai, Meng
    CHEMOSPHERE, 2022, 307
  • [29] Detachment of Solids and Nitrifiers in Integrated, Fixed-Film Activated Sludge Systems
    Maas, Carol L. A.
    Parker, Wayne J.
    Legge, Raymond L.
    WATER ENVIRONMENT RESEARCH, 2008, 80 (12) : 2202 - 2208
  • [30] Fate of Emerging Contaminants in an Integrated Fixed-Film Activated Sludge Plant
    Ali, Muntjeer
    Kumar, Mohak
    Vellanki, Bhanu Prakash
    Kazmi, Absar Ahmad
    JOURNAL OF HAZARDOUS TOXIC AND RADIOACTIVE WASTE, 2022, 26 (01)