Performance of anoxic and aerobic flocs in anoxic/aerobic-membrane bioreactor (A/O–MBR) for the treatment of printing and dyeing wastewater (PDW)

IF 3.7 3区生物学 Q2 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Biochemical Engineering Journal Pub Date : 2025-09-25 DOI:10.1016/j.bej.2025.109943

Chunkai Huang , Han Zhang , Jincan Huang , Lu Zhang , Siqi Tong , Feng Wang , Guangbing Liu , Xuemin Yu , Haibo Xu , Weijing Liu

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引用次数: 0

Abstract

This study compared and elucidated the performance and mechanisms of aerobic and anoxic flocs in anoxic/aerobic-membrane bioreactor (A/O–MBR) for the printing and dyeing wastewater (PDW) treatment. The batch experiments were conducted with aerobic and anoxic flocs from our continuous laboratory-scale A/O–MBR for the PDW remediation. A distinct discrepancy between aerobic and anoxic activated sludge flocs for chemical oxygen demand (COD) and adsorbable organic halogens (AOX) removal was demonstrated. Specifically, the aerobic flocs exhibited considerable higher COD removal efficiencies (O1 59.0 %, O2 76.4 %) than the anoxic flocs (A1 56.5 %, A2 61.0 %) owing to the stronger organic biodegradability of aerobic respiration, while anoxic flocs exhibited greater performance on the AOX removal (A1 87.8 %) than aerobic flocs (O1 76.8 %) after 12 h biodegradation due to the greater abundance of AOX degradation relevant gene in anoxic flocs. Meanwhile, the study also revealed that the biodegradation was the principal mechanism for COD removal in PDW, whereas, both biodegradation and biosorption contributed to the AOX removal. This study provides valuable insights into the upgrading and reconstruction of A/O process in PDW treatment plants.

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厌氧/好氧-膜生物反应器（A/ O-MBR）处理印染废水（PDW）的厌氧和好氧絮凝体性能

研究了好氧/好氧膜生物反应器（A/ O-MBR）处理印染废水（PDW）的好氧和厌氧絮凝体的性能和机理。采用实验室规模的连续A/ O-MBR的好氧和缺氧絮凝体进行了批量试验。有氧和缺氧活性污泥絮凝体在去除化学需氧量（COD）和可吸附有机卤素（AOX）方面存在明显差异。其中，好氧絮凝体对COD的去除率（O1 59.0 %,O2 76.4 %）明显高于缺氧絮凝体（A1 56.5 %,A2 61.0 %），这是由于好氧呼吸的有机生物降解性更强，而缺氧絮凝体在生物降解12 h后对AOX的去除率（A1 87.8 %）高于好氧絮凝体（O1 76.8 %），这是由于缺氧絮凝体中AOX降解相关基因的丰富度更高。同时，研究还发现，生物降解是PDW中COD去除的主要机制，而生物降解和生物吸附对AOX的去除都有贡献。本研究为污水处理厂A/O工艺的升级改造提供了有价值的见解。

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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.