Biological treatment of refractory pollutants in industrial wastewaters under aerobic or anaerobic condition: Batch tests and associated microbial community analysis
Journal
Bioresource Technology Reports
Journal Volume
17
Date Issued
2022
Author(s)
Abstract
In this study, aerobic or anaerobic biological treatment of streams collected from different units of industrial wastewater treatment plant (WWTP) was studied in a series of batch tests. Under aerobic condition, the removal efficiencies of COD, NH4+-N and TP were 57.7%, 83.8% and 100% for influent of WWTP (IN), 64.4%, 61.3% and 100% for effluent of secondary sedimentation tank (EN-SST), and 2.3%, 64.3% and 10.6% for effluent of advanced oxidation tank (EN-AOT). Meanwhile, the removal efficiencies of COD, NH4+-N, TOC were above 30% under anaerobic conditions. The GC–MS analysis showed a presence of 59 kinds of chemicals in IN, 28 in EN-SST, and 8 in EN-AOT. The main organic compounds were long-chain alkanes and derivatives. After aerobic/anaerobic biological treatment, the abundance of Proteobacteria, Bacteroidota, Nitrospirota was 40.4–56.1% (IN), 5.3–17.5% (EN-SST), and 4.6–13.4% (EN-AOT), respectively. This work contributed to deeply understanding the biotransformation mechanisms of refractory pollutants in industrial wastewaters. ? 2021 Elsevier Ltd
Subjects
Activated sludge
Industrial wastewater
Microbial community
Refractory pollutants
Activated sludge process
Biochemical engineering
Biological water treatment
Chemical oxygen demand
Efficiency
Effluents
Industrial water treatment
Pollution
Refractory materials
Wastewater
Wastewater treatment
Advanced oxidation
Aerobic condition
Anaerobic biological treatments
Anaerobic conditions
Batch tests
Industrial wastewaters
Microbial communities
Refractory pollutant
Secondary sedimentation tanks
Microorganisms
Type
journal article