A Win-Win Marriage of Modified Zero-Valent Iron and Hbcd-Degrading Bacteria Enhances the Treatment of Real Wastewater by Activated Sludge

作     者：Li, Tianyu He, Yuzhe Zhang, Weixian Peng, Xingxing 

作者机构：South China Agricultural University China School of Environmental Science and Engineering Sun Yat-sen University Guangdong Guangzhou510006 China Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology Guangzhou510275 China Tongji University College of Environmental Science & Engineering State Key Lab Pollut Control & Resource Reuse Shanghai200092 China 

出 版 物：《SSRN》 

年 卷 期：2024年

核心收录：

主　　题：Wastewater treatment 

摘      要：Based on the research foundation of the functional strain Citrobacter sp. Y3 and modified nano-zero-valent iron (nZVI) coupling system, we designed and constructed a new anaerobic continuous stirred-tank reactor (CSTR) system for the treatment of actual wastewater in this study. HBCD-containing wastewater and actual domestic sewage were fed into this CSTR system. While continuously monitoring the change of HCBD concentration in 360 h, we also pay attention to the removal of nitrogen (N), phosphorus (P), and chemical oxygen demand (COD). The results revealed that the HBCD degradation rate reached 100% after 72 h in the CSTR system, and the removal of other nutrients reached the discharge standard. The CSTR system significantly enriched various functional bacterial strains carrying multiple functional genes, such as organohalide-respiring bacteria (OHRB) (rdhA/B, PecA/B, etc.), iron-reducing bacteria (IRB) (cymA, fur, etc.), and nitrogen and phosphorus removal bacteria (nxrA/B, nirA/B, and pstA/B/C, etc.). There was cooperation and competition among multiple microbial communities within the reactor, and cooperate to complete the decomposition and transformation of pollutants. This is the first exploration of coupling functional bacterial with modified nanomaterials for application in activated sludge. © 2024, The Authors. All rights reserved.