超声污泥回流对城市污水处理厂厌氧/缺氧/好氧（A2/O）系统的影响：污染物去除、污泥减少和微生物群落

IF 3.7 3区生物学 Q2 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Biochemical Engineering Journal Pub Date : 2025-08-25 DOI:10.1016/j.bej.2025.109910

Jin-Ming Qiu , Hong-Yu Jiang , Yi-Juan Yan , Chen-Shun Lu , Xiang Li , Takuro Kobayashi , Yong Hu

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引用次数: 0

摘要

城市污水处理厂（MWWTPs）目前面临着低碳进水源和过量污泥等挑战。利用超声波污泥分解可以补充生化池的碳源，实现原位污泥减量。在MWWTP进行了一项全尺寸实验，研究了回流点对改进A2/O系统性能的影响，回流点包括预缺氧（PrAX）、前缺氧（AAX）和厌氧（an）池。结果表明，超声的使用对改进后的A2/O系统出水水质没有影响。最佳回流点为AN，污泥减少37.4 %，污泥沉降度提高（SVI降低13.39 mL/g）。氮平衡计算表明，将分解污泥回流到AAX，其反硝化和脱氮效率（DNR）提高了12.22 %。添加有机物也增加了AAX中酸性菌群的相对丰度（3.19 %）。AAX反硝化除磷效率（DPR）提高32.02 %。AAX充分利用了超声波污泥为AN提供的更易储存的碳源。反流使拟杆菌群的相对丰度提高了5.47 %。本研究考察了不同污泥回流点对污染物去除和污泥减量的协同效应，为在MWWTPs中实施污泥超声处理提供了实践依据。

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Effects of ultrasonic sludge reflux in an improved anaerobic/anoxic/oxic(A2/O) system for municipal wastewater treatment plant: Pollutant removal, sludge reduction, and microbial community

Municipal wastewater treatment plants (MWWTPs) are currently facing challenges like low carbon sources of influent and excess sludge. Utilizing ultrasonic sludge disintegration can help supplement the carbon source for the biochemical tank and achieve in-situ sludge reduction. A full-scale experiment was conducted at an MWWTP to investigate the impact of reflux points on the performance of an improved A²/O system, and the reflux points included pre-anoxic (PrAX), anterior anoxic (AAX) and anaerobic (AN) tanks. Results showed that the use of ultrasound did not impact the effluent quality of the improved A²/O system. The optimal reflux point was AN, resulting in a 37.4 % sludge reduction while enhancing sludge settleability (SVI decreased by 13.39 mL/g). Nitrogen balance calculations revealed that refluxing disintegrated sludge to AAX increased its denitrification and nitrogen removal efficiency (DNR) by 12.22 %. The supplementation of organic matter also increased the relative abundance of Acidobacteriota (3.19 %) in the AAX. Refluxing to AN increased the denitrification phosphorus removal efficiency (DPR) of AAX by 32.02 %. AAX fully utilized the more storable carbon sources provided by ultrasonic sludge for AN. Refluxing to AN increased the relative abundance of Bacteroidota in AN by 5.47 %. This study investigated the synergistic effects of different sludge reflux points on pollutant removal and sludge reduction, providing a practical basis for implementing sludge ultrasonic treatment in MWWTPs.

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来源期刊

Biochemical Engineering Journal 工程技术-工程：化工

CiteScore

7.10

自引率

5.10%

发文量

380

审稿时长

34 days

期刊介绍： The Biochemical Engineering Journal aims to promote progress in the crucial chemical engineering aspects of the development of biological processes associated with everything from raw materials preparation to product recovery relevant to industries as diverse as medical/healthcare, industrial biotechnology, and environmental biotechnology. The Journal welcomes full length original research papers, short communications, and review papers* in the following research fields: Biocatalysis (enzyme or microbial) and biotransformations, including immobilized biocatalyst preparation and kinetics Biosensors and Biodevices including biofabrication and novel fuel cell development Bioseparations including scale-up and protein refolding/renaturation Environmental Bioengineering including bioconversion, bioremediation, and microbial fuel cells Bioreactor Systems including characterization, optimization and scale-up Bioresources and Biorefinery Engineering including biomass conversion, biofuels, bioenergy, and optimization Industrial Biotechnology including specialty chemicals, platform chemicals and neutraceuticals Biomaterials and Tissue Engineering including bioartificial organs, cell encapsulation, and controlled release Cell Culture Engineering (plant, animal or insect cells) including viral vectors, monoclonal antibodies, recombinant proteins, vaccines, and secondary metabolites Cell Therapies and Stem Cells including pluripotent, mesenchymal and hematopoietic stem cells; immunotherapies; tissue-specific differentiation; and cryopreservation Metabolic Engineering, Systems and Synthetic Biology including OMICS, bioinformatics, in silico biology, and metabolic flux analysis Protein Engineering including enzyme engineering and directed evolution.