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Bioresour. Technol., May 16 2024, S0960-8524(24)00551-0 | https://doi.org/10.1016/j.biortech.2024.130848 Benefits of fungal-to-bacterial quorum quenching as anti-biofouling strategy in membrane bioreactors for wastewater treatment and water reuse

Jeongmi Park ^a, Hyeyeon Park ^a, Jun-U Jang ^a, Hyunjung Kim ^a, Hyeona Park ^b, Tahir Iqbal ^c,d, Hyun-Suk Oh ^e, Kwang-Ho Choo ^b,c, Kibaek Lee^a

^aDepartment of Biotechnology and Bioengineering, Chonnam National University, Gwangju 61186, Republic of Korea

^bAdvanced Institute of Water Industry, Kyungpook National University, Daegu 41566, Republic of Korea

^cDepartment of Environmental Engineering, Kyungpook National University, Daegu 41566, Republic of Korea

^dDepartment of Chemical Engineering, Pakistan Institute of Engineering and Applied Sciences, Islamabad 44000, Pakistan

^eDepartment of Environmental Engineering, Seoul National University of Science & Technology, Seoul 01811, Republic of Korea

Corresponding author : Kibaek Lee

Abstract

This study addresses membrane biofouling in membrane bioreactors (MBRs) by exploring fungal-to-bacterial quorum quenching (QQ) strategies. While most research has been focused on bacterial-to-bacterial QQ tactics, this study identified fungal strain Vanrija sp. MS1, which is capable of degrading N-acyl-homoserine lactones (signaling molecules of Gram-negative bacteria). To determine the benefits of fungal over bacterial strains, after immobilization on fluidizing spherical beads in an MBR, MS1 significantly reduced the fouling rate by 1.8-fold compared to control MBR, decreased extracellular polymeric substance levels in the biofilm during MBR operation, and favorably changed microbial community and bacterial network, resulting in biofouling mitigation. It is noteworthy that, unlike Rhodococcus sp. BH4, MS1 enhanced QQ activity when switching from neutral to acidic conditions. These results suggest that MS1 has the potential for the effective treatment of acidic industrial wastewater sources such as semiconductor and secondary battery wastewater using MBRs.

논문정보

형식Research article
게재일2024년 05월 (BRIC 등록일 2024-05-20)
연구진국내(교신)+국외 연구진
분야 바이오·의료융합 > 다학제 융합/복합

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