Evaluation of different demulsifiers for Marpol oil waste recovery

Yau, Yiu-hung, Rudolph, Victor, Ho, Kin-chung, Lo, Cat Chui-man and Wu, Kam-chau (2017) Evaluation of different demulsifiers for Marpol oil waste recovery. Journal of Water Processing Engineering, 17 40-49. doi:10.1016/j.jwpe.2017.02.013

Author Yau, Yiu-hung
Rudolph, Victor
Ho, Kin-chung
Lo, Cat Chui-man
Wu, Kam-chau
Title Evaluation of different demulsifiers for Marpol oil waste recovery
Journal name Journal of Water Processing Engineering   Check publisher's open access policy
ISSN 2214-7144
Publication date 2017-06-01
Sub-type Article (original research)
DOI 10.1016/j.jwpe.2017.02.013
Open Access Status Not yet assessed
Volume 17
Start page 40
End page 49
Total pages 10
Place of publication Amsterdam, Netherlands
Publisher Elsevier BV
Language eng
Subject 1305 Biotechnology
2213 Safety, Risk, Reliability and Quality
2311 Waste Management and Disposal
1508 Process Chemistry and Technology
Abstract Marpol oil waste composed of wasted oil with seawater which is challenging for waste treatment. Therefore, emulsified seawater has to be broken down for recovering the oil content involving chemical destabilizer to disperse water droplets or destroy emulsifiers. This study aims to evaluate 37 products of demulsifiers (cationic, non-ionic and anionic) based on ability of water removal from Marpol oil waste. The results show that anionic and nonionic surfactants were found to be effective demulsifiers exhibiting good property for oil and water separation. The efficiency of the nonionic demulsifiers increases with the dosage up to a certain extent after which the efficiency falls. However, anionic demulsifiers do not show any decrease in efficiency at higher doses. Among all the tested anionic demulsifiers, sodium dioctyl sulfosuccinate (ALCOPOL O70 PG), sodium dioctyl sulfosuccinate (ALCOPOL O CONC 60%) and Oligoguluronate (DP9-6661) were with most outstanding performance. Additionally there is a general improvement in the performance of screened demulsifiers with increased temperature (70 °C). Sodium dioctyl sulfosuccinate (ALCOPOL O70 PG), sodium dioctyl sulfosuccinate (ALCOPOL O CONC 60%) and sodium dodecyl benzene sulphonate (DP9-6661) reached water removal performance percentage as 75%, 66.3% and 56.7% respectively after 30 h. When the water content of recovered oil was reduced to a certain level (below 10%), the heat valve was about 40 MJ/kg. The recovered Marpol oil waste was suggested to apply for low-quality fuel usage such as cement kilns and waste incinerators with its property of high energy value, low sulphur content and Polychlorinated Biphenyls (PCBs).
Keyword Demulsifier
Marpol oil waste
Oil water separation
Water-in-Marpol oil emulsion
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
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