Integrated Photoheterotrophic and Photoautotrophic Membrane Bioreactor for Sustainable 1,2-Dichloroethane Detoxification in Petroleum Wastewater

作     者：Alhajeri, Nawaf S. Tawfik, Ahmed Al-Fadhli, Fahad M. Elsamadony, Mohamed Meng, Fangang 

作者机构：Department of Environmental Sciences College of Life Sciences Kuwait University P.O. Box 5969 Safat13060 Kuwait Department of Civil and Environmental Engineering Department of Chemical Engineering College of Engineering and Petroleum Kuwait University P.O. Box 5969 Safat13060 Kuwait School of Environmental Science and Engineering Sun Yat-sen University Guangzhou510006 China Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology Guangzhou510006 China 

出 版 物：《SSRN》 

年 卷 期：2024年

核心收录：

主　　题：Bioreactors 

摘      要：The study addressed the challenge of treating petroleum industry wastewater with high concentrations of 1,2-dichloroethane (1,2-DCA) ranging from 384 to 1654 mg/L, which poses a challenge for bacterial biodegradation and algal photodegradation. To overcome this, a collaborative approach using membrane bioreactors (MBRs) that combine algae and bacteria was employed. This synergistic method effectively mitigated the toxicity of 1,2-DCA and curbed MBR fouling. Two types of MBRs were tested: one (B-MBR) used bacterial cultures and the other (AB-MBR) incorporated a mix of algal and bacterial cultures. The AB-MBR significantly contributed to 1,2-DCA removal, with algae accounting for over 20% and bacteria for approximately 49.5% of the dechlorination process. 1,2-DCA metabolites, including 2-chloroethanol, 2-chloro-acetaldehyde, 2-chloroacetic acid, and acetic acid, were partially consumed as carbon sources by algae. The microbial diversity in AB-MBR surpassed that in B-MBR, with a notable increase in Proteobacteria, Bacteroidota, Planctomycetota, and Verrucomicrobiota. Furthermore, AB-MBR showed a significant rise in the dominance of 1,2-DCA-degrading genus such as Pseudomonas and Acinetobacter. Additionally, algal-degrading phyla (e.g., Nematoda, Rotifera, and Streptophyta) were more prevalent in AB-MBR, substantially reducing the issue of membrane fouling. © 2024, The Authors. All rights reserved.