A Field Pilot-scale Study of Biological Treatment of Heavy Oil-produced Water by Biological Filter with Airlift Aeration and Hydrolytic Acidification System

Overview

Journal Environ Sci Pollut Res Int

Publisher Springer

Specialties Environmental Health
Toxicology

Date 2015 Nov 10

PMID 26549708

Citations 1

Authors

Min Zhang

Junming Wang

Zhongzhi Zhang

Zhaozheng Song

Zhenjia Zhang

Beiyu Zhang

Guangqing Zhang

Wei-Min Wu

Affiliations

Soon will be listed here.

Abstract

Heavy oil-produced water (HOPW) is a by-product during heavy oil exploitation and can cause serious environmental pollution if discharged without adequate treatment. Commercial biochemical treatment units are important parts of HOPW treatment processes, but many are not in stable operation because of the toxic and refractory substances, salt, present. Therefore, pilot-scale experiments were conducted to evaluate the performance of hydrolytic acidification-biological filter with airlift aeration (HA-BFAA), a novel HOPW treatment system. Four strains isolated from oily sludge were used for bioaugmentation to enhance the biodegradation of organic pollutants. The isolated bacteria were evaluated using 3-day biochemical oxygen demand, oil, dodecyl benzene sulfonic acid, and chemical oxygen demand (COD) removals as evaluation indices. Bioaugmentation enhanced the COD removal by 43.5 mg/L under a volume load of 0.249 kg COD/m(3) day and hydraulic retention time of 33.6 h. The effluent COD was 70.9 mg/L and the corresponding COD removal was 75.0 %. The optimum volumetric air-to-water ratio was below 10. The removal ratios of the total extractable organic pollutants, alkanes, and poly-aromatic hydrocarbons were 71.1, 94.4, and 94.0 %, respectively. Results demonstrated that HA-BFAA was an excellent HOPW treatment system.

Citing Articles

Elucidate microbial characteristics in a full-scale treatment plant for offshore oil produced wastewater.

Deng S, Wang B, Zhang W, Su S, Dong H, Banat I PLoS One. 2021; 16(8):e0255836.

PMID: 34383807 PMC: 8360554. DOI: 10.1371/journal.pone.0255836.

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