title: A field pilot-scale study of biological treatment of heavy oil-produced water by biological filter with airlift aeration and hydrolytic acidification system.
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.
authors.affiliation: State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum, Beijing, 102249, People's Republic of China.
authors.forename: Min
authors.initials: M
authors.lastname: Zhang
authors.affiliation: Dalian Design Branch, China Petroleum Engineering & Construction Corporation, Dalian, 116011, China.
authors.forename: Junming
authors.initials: J
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum, Beijing, 102249, People's Republic of China. bjzzzhang@163.com.
authors.forename: Zhongzhi
authors.initials: Z
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Heavy Oil Processing, Faculty of Sciences, China University of Petroleum, Beijing, 102249, People's Republic of China.
authors.forename: Zhaozheng
authors.initials: Z
authors.lastname: Song
authors.affiliation: School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China.
authors.forename: Zhenjia
authors.initials: Z
authors.lastname: Zhang
authors.affiliation: Dalian Design Branch, China Petroleum Engineering & Construction Corporation, Dalian, 116011, China.
authors.forename: Beiyu
authors.initials: B
authors.lastname: Zhang
authors.affiliation: School of Mechanical, Materials & Mechatronic Engineering, University of Wollongong, Wollongong, NSW2522, Australia.
authors.forename: Guangqing
authors.initials: G
authors.lastname: Zhang
authors.affiliation: Department of Civil & Environmental Engineering, Center for Sustainable Development & Global Competitiveness, Stanford University, Stanford, CA, 94305-4020, USA.
authors.forename: Wei-Min
authors.initials: WM
authors.lastname: Wu
mesh_terms: D001420:Bacteria, Aerobic / Q000378:metabolism; D001673:Biodegradation, Environmental; D057919:Biological Oxygen Demand Analysis; D019149:Bioreactors / Q000382:microbiology*; D002681:China; D004867:Equipment Design; D005374:Filtration; D006868:Hydrolysis; D000066388:Oil and Gas Industry; D010865:Pilot Projects; D012722:Sewage / Q000382:microbiology; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000378:metabolism; D018508:Water Purification / Q000379:methods*
chemical_list: D012722:Sewage; D014874:Water Pollutants, Chemical
keywords: Bioaugmentation; Biodegradation; Biological filter with airlift aeration; Heavy oil-produced water; Refractory organic matter; Removal of total nitrogen