Biodegradation time series characteristics and metabolic fate of different aromatic compounds in the biochemical treatment process of coal chemical wastewater

Lu Yang; Yongjun Liu; Chen Li; Zhe Liu; Xingshe Liu; Chunxiao Wei; Zhuangzhuang Yang; Aining Zhang

doi:10.1016/j.biortech.2022.127688

Biodegradation time series characteristics and metabolic fate of different aromatic compounds in the biochemical treatment process of coal chemical wastewater

Bioresour Technol. 2022 Oct:361:127688. doi: 10.1016/j.biortech.2022.127688. Epub 2022 Jul 25.

Authors

Lu Yang¹, Yongjun Liu², Chen Li¹, Zhe Liu¹, Xingshe Liu¹, Chunxiao Wei¹, Zhuangzhuang Yang¹, Aining Zhang¹

Affiliations

¹ School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Yan Ta Road. No.13, Xi'an 710055, China; Key Lab of Northwest Water Resource, Environment and Ecology, Ministry of Education, Xi'an University of Architecture and Technology, Xi'an 710055, China.
² School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Yan Ta Road. No.13, Xi'an 710055, China; Key Lab of Northwest Water Resource, Environment and Ecology, Ministry of Education, Xi'an University of Architecture and Technology, Xi'an 710055, China. Electronic address: liuyongjun@xauat.edu.cn.

PMID: 35901864
DOI: 10.1016/j.biortech.2022.127688

Abstract

In this study, the biochemical treatment system of coal chemical wastewater (CCW) was constructed to degrade aromatic compounds. The biodegradation time series characteristics of 8 benzene series (BTEX), 6 phenols, 10 polycyclic aromatic hydrocarbons (PAHs), and 3 nitrogen heterocyclic compounds (NHCs) were detected. The aim was to clarify the storage characteristics and dynamic transformation in water, EPS, and cells of these aromatic compounds. The results showed that BTEX and NHCs were more easily degraded than PAHs and phenols. Furthermore, aromatic compounds were initially adsorbed into EPS from water by microorganisms. Then, some were degraded, and others were transferred into the cell. Finally, they were completely degraded. The percentage of surplus content with them in EPS and cells were PAHs > phenols > NHCs = BTEX. The study could lay a theoretical foundation for the regulation and harmless treatment of the CCW in the stable operation of the biochemical treatment system.

Keywords: Aromatic compounds; Biochemical treatment; Biodegradation time series characteristics; Coal chemical wastewater; Metabolic fate.

MeSH terms

Biodegradation, Environmental
Coal / analysis
Organic Chemicals
Phenols
Polycyclic Aromatic Hydrocarbons* / analysis
Time Factors
Wastewater / chemistry
Water
Water Pollutants, Chemical* / analysis

Substances

Coal
Organic Chemicals
Phenols
Polycyclic Aromatic Hydrocarbons
Waste Water
Water Pollutants, Chemical
Water