Comprehensive analysis and characterization of overhaul wastewater from petrochemical refineries

ZHANG Xuan; CHEN Lin; ZHANG Xinqian; WANG Qinghong; HE Chen; ZHAN Yali; CHEN Chunmao

doi:10.19965/j.cnki.iwt.2023-0925

Gongye shui chuli (Sep 2024)

Comprehensive analysis and characterization of overhaul wastewater from petrochemical refineries

ZHANG Xuan,
CHEN Lin,
ZHANG Xinqian,
WANG Qinghong,
HE Chen,
ZHAN Yali,
CHEN Chunmao

Affiliations

ZHANG Xuan: China Petroleum Group Safety and Environmental Protection Technology Research Institute Co., Ltd., Beijing 102200, China
CHEN Lin: State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering and Environment, China University of Petroleum (Beijing), Beijing 102249, China
ZHANG Xinqian: State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering and Environment, China University of Petroleum (Beijing), Beijing 102249, China
WANG Qinghong: State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering and Environment, China University of Petroleum (Beijing), Beijing 102249, China
HE Chen: State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering and Environment, China University of Petroleum (Beijing), Beijing 102249, China
ZHAN Yali: State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering and Environment, China University of Petroleum (Beijing), Beijing 102249, China
CHEN Chunmao: State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering and Environment, China University of Petroleum (Beijing), Beijing 102249, China

DOI: https://doi.org/10.19965/j.cnki.iwt.2023-0925
Journal volume & issue: Vol. 44, no. 9
pp. 151 – 159

Abstract

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During the overhaul of petrochemical refineries, a large amount of wastewater will be discharged unorganized, which has a serious impact on the operation of wastewater treatment system. In this study, macroscopic pollutant index analysis was combined with microscopic pollutant composition analysis, and the water quality of cleaning wastewater and cleaning-passivation wastewater were characterized from four aspects: pollutant load, system stability, pollutant composition, and biological toxicity. Both cleaning wastewater and cleaning-passivation wastewater exhibited high organic pollutant loads, high concentrations of suspended and colloidal pollutants, high system stability, and strong acute biological toxicity. The composition of polar pollutants of cleaning wastewater and cleaning-passivation wastewater was dominated by OxS1. Cleaning wastewater had the highest relative abundance of O3S1, which was speculated to be derived from alkyl benzene sulfonates. The relative abundance of O4S1 was the highest in cleaning-passivation wastewater, which was presumed to come from alkyl sulfates or sulfate surfactants. There was a significant difference in the composition of weakly polar pollutants between the cleaning wastewater and cleaning-passivation wastewater. Cleaning wastewater was mainly consisted of alcohol ethers, ethers, and petroleum hydrocarbons. Cleaning-passivation wastewater was mainly consisted of small molecule heterocycles, aromatic hydrocarbons, and phenols. The results could guide the development of pretreatment processes for overhaul wastewater, and provide support for the stable operation of comprehensive wastewater plant during overhaul of petrochemical refineries.

Published in Gongye shui chuli

ISSN: 1005-829X (Print)
Publisher: Editorial Office of Industrial Water Treatment
Country of publisher: China
LCC subjects: Technology: Environmental technology. Sanitary engineering
Website: http://www.iwt.cn/EN/home

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