Research on Air Flotation-Biochemistry-Ultra-Filtration Treatment Technology of Heavy Oil Sewage

Yongqiang PAN, Yuwen LIU, Ximing LI, Zhijian WANG, Qingxin SONG, Xin BAI

Abstract


At present, the quality of effluent water from the pretreatment process of ultra-filtration in BinYi station is poor, which lead to late block and effluent water is not up to A1 standard. Based on the analysis of the ultra-filtration membrane pollutants, a scale of 1 m3/d field experiment was carried out in Binyi station. Air flotation- biochemistry –ultra-filtration process was used, biochemical degradation strains of COD (BW-1, BW-2, BW-3, WSW-4) and heavy oil degradation strains (3-2-1, 1-2-1) were inoculated. After treatment, the COD of ultra-filtration effluent decreased from 300-400 mg/L to 60-80mg/L, oil content decreased from 20-60 mg/L to about 1 mg/L, suspended solids reduced from 50-100 mg/L to under 1mg/L, the median diameter decreased from 6.4 µm to 0.8 µm, SRB reduced from 25 to 0 per milliliter, HCO3- decreased from 500-600 mg/L to below 100 mg/L, the hardness decreased from 11-12 mmol/L to 10-11 mmol/L, NO3- increased from 0 to 63 mg/L, SDI reduced to 4.8.

 


Keywords


Heavy oil sewage; Biochemical; SDI

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References


Pan, Y. Q., Wu, X. L, & Yuan, C. Z. (2016). Research for biological technology to heavy oil sewage membrane pollution. Petroleum and Natural Gas Chemical Engineering, 45(5), 90-94.

Sun, G. X. (2010). Oil refining sewage advanced treatment and reuse at home and abroad present situation and prospects. Safety, Health and Environment, 10(2), 28-31, 40.

Wang, X., Du, L. X., & Zhao, F. M. (2003). Study on oilfield excretion sewage biochemical treatment experiment. Petroleum and Natural Gas Chemical Engineering, 32(1), 59-61.




DOI: http://dx.doi.org/10.3968/9454

DOI (PDF): http://dx.doi.org/10.3968/pdf

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