eprintid: 14850
rev_number: 2
eprint_status: archive
userid: 1
dir: disk0/00/01/48/50
datestamp: 2023-11-10 03:29:26
lastmod: 2023-11-10 03:29:26
status_changed: 2023-11-10 01:57:58
type: article
metadata_visibility: show
creators_name: Mustapha, S.N.A.
creators_name: Amran, N.A.
creators_name: Roslan, I.L.
creators_name: Chandra Segaran, R.
creators_name: Samsuri, S.
title: Potential efficient separation of oil from bilgewater and kitchen wastewater by fractional freezing process
ispublished: pub
note: cited By 2
abstract: Oily wastewater discharge to water bodies can have many negative consequences, espe-cially on the marine ecological environment. Although there are numerous techniques for treating oily wastewater, this paper aims to introduce and evaluate the potential of the fractional freezing (FF) process as a new oil�water separation technique to overcome the several weaknesses found in the conventional oil�water separation methods. FF separates two liquid compounds based on their freezing point difference. In this study, two oily wastewater samples were used: oily bilgewater and oily kitchen wastewater. The effects of coolant temperature, freezing time, and stirring rate on the FF process efficiency were studied, and the significance of the data was supported by statistical analysis. The results show that a low coolant temperature is essential for allowing crystal nucleation formation and inducing crystal growth for an efficient separation process. However, the higher crystal growth rate that occurs at an even lower temperature might entrap the impurities inside the growing crystal. Consequently, continuing the crystallization for a longer time may yield a less efficient separation process. Furthermore, a too high stirring rate will rupture the solid formation, hence reducing the process efficiency. The final values of oil/grease and free fatty acids (FFA) obtained after the FF process of both samples were found to comply with the standard permitted by the International Maritime Organization (IMO) and Palm Oil Refiners Association of Malaysia (PORAM). Moreover, the p-values obtained for both of the above-mentioned samples were below 0.05 for all experiments. It can be concluded that this method has the potential to separate oil from the oily bilgewater and kitchen wastewater. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
date: 2021
publisher: MDPI AG
official_url: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85108724572&doi=10.3390%2fcryst11060685&partnerID=40&md5=8037fc595a16ec8cf2fa0b131fc32352
id_number: 10.3390/cryst11060685
full_text_status: none
publication: Crystals
volume: 11
number: 6
refereed: TRUE
issn: 20734352
citation:   Mustapha, S.N.A. and Amran, N.A. and Roslan, I.L. and Chandra Segaran, R. and Samsuri, S.  (2021) Potential efficient separation of oil from bilgewater and kitchen wastewater by fractional freezing process.  Crystals, 11 (6).   ISSN 20734352