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Treatment of aging oily wastewater by demulsification/flocculation
The aging oily wastewater (AOW) from Tarim oilfield in China was treated by demulsification/flocculation. A novel sewage treatment agent (YL-7) was developed using a cationic surfactant (LY) and flocculants (polydimethyl diallyl ammonium chloride (PDMDAAC)/polyaluminum chloride (PAC)). At an YL-7 dosage of 320 mg L−1 at 323 K for 90 min, the oil content of AOW was reduced from 728.8 mg L−1 to 23.7 mg L−1, and oil removal efficiency reached 96.7%. Microorganism flocs (extracted from AOW) with high negative zeta potential enhanced the stability of oil/water emulsion. LY and PDMDAAC neutralized the negative charge on the oil droplet surface. PDMDAAC and PAC mainly bridged and swept flocs during the flocculation process. YL-7 was found to be a suitable sewage treatment agent in removing oil from AOW.
Treatment of aging oily wastewater by demulsification/flocculation
The aging oily wastewater (AOW) from Tarim oilfield in China was treated by demulsification/flocculation. A novel sewage treatment agent (YL-7) was developed using a cationic surfactant (LY) and flocculants (polydimethyl diallyl ammonium chloride (PDMDAAC)/polyaluminum chloride (PAC)). At an YL-7 dosage of 320 mg L−1 at 323 K for 90 min, the oil content of AOW was reduced from 728.8 mg L−1 to 23.7 mg L−1, and oil removal efficiency reached 96.7%. Microorganism flocs (extracted from AOW) with high negative zeta potential enhanced the stability of oil/water emulsion. LY and PDMDAAC neutralized the negative charge on the oil droplet surface. PDMDAAC and PAC mainly bridged and swept flocs during the flocculation process. YL-7 was found to be a suitable sewage treatment agent in removing oil from AOW.
Treatment of aging oily wastewater by demulsification/flocculation
Yang, Jing Y. (author) / Yan, Liang (author) / Li, Shao P. (author) / Xu, Xin R. (author)
Journal of Environmental Science and Health, Part A ; 51 ; 798-804
2016-08-23
7 pages
Article (Journal)
Electronic Resource
English
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