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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 (Autor:in) / Yan, Liang / Li, Shao P / Xu, Xin R
2016
Aufsatz (Zeitschrift)
Englisch
USA , Recht , Zeitschrift , Datenverarbeitung
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