The upcycling of waste frying oil and the effect on sophorolipid productivity

IF 1.6 4区 工程技术 Q3 CHEMISTRY, APPLIED
Ryu Ishizaki, Michiaki Araki, Glen Lelyn Quan, Yoshihiko Hirata
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Abstract

Waste frying oil (WFO) is a degraded form of oil that is produced from repeated exposure to high temperatures during cooking. Many research studies have focused on the use of recycled WFO. These studies are highly promoted because of the need to find new ways of reducing the negative impact of WFO on the environment. One of these studies focused on the production of sophorolipid (SL), a naturally derived eco-friendly glycolipid biosurfactant. Unfortunately, the environmental and societal advantages brought about by the wide-spread use of SL are offset by its high production cost. WFO is a high-volume, inexpensive material that can be used as a substrate for SL production. As such, by utilizing WFO as a feedstock material cost reduction can be realized to improve large-scale application potential. One drawback to the use of WFO is that its physical characteristics are different from fresh oil and its effect on SL productivity (g/day) has not been investigated. This research focused on the effect of acid value (AV), peroxide value (PV), and carbonyl value (CV) of WFO on SL productivity. It was confirmed that SL titers (111.1 vs. 106.7 g/L) did not differ significantly after using either fresh oil (CV <0.01) or WFO, respectively. In addition, this research also confirmed that higher WFO degradation required longer culture periods (from 6 days to 9 days) to reach comparable SL concentrations as that produced with fresh oil.

废弃煎炸油的循环利用及其对羊脂生产率的影响
废弃煎炸油(WFO)是一种在烹饪过程中反复暴露于高温下产生的降解油。许多研究都侧重于使用回收的 WFO。由于需要找到新的方法来减少 WFO 对环境的负面影响,这些研究得到了大力推广。其中一项研究的重点是槐脂(SL)的生产,这是一种天然提取的环保型糖脂生物表面活性剂。遗憾的是,SL 的高生产成本抵消了其广泛使用所带来的环境和社会优势。WFO 是一种量大价廉的材料,可用作生产 SL 的基质。因此,将 WFO 用作原料材料可以降低成本,提高大规模应用的潜力。使用 WFO 的一个缺点是其物理特性与新鲜油不同,而且尚未研究其对 SL 生产率(克/天)的影响。本研究重点关注 WFO 的酸值(AV)、过氧化值(PV)和羰基值(CV)对可溶性有机物生产率的影响。研究证实,在分别使用新鲜油(CV <0.01)或 WFO 后,SL 滴度(111.1 与 106.7 克/升)没有显著差异。此外,这项研究还证实,较高的 WFO 降解需要较长的培养期(从 6 天到 9 天不等),才能达到与使用新鲜油产生的可溶性藻类浓度相当的水平。
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来源期刊
Journal of Surfactants and Detergents
Journal of Surfactants and Detergents 工程技术-工程:化工
CiteScore
3.80
自引率
6.20%
发文量
68
审稿时长
4 months
期刊介绍: Journal of Surfactants and Detergents, a journal of the American Oil Chemists’ Society (AOCS) publishes scientific contributions in the surfactants and detergents area. This includes the basic and applied science of petrochemical and oleochemical surfactants, the development and performance of surfactants in all applications, as well as the development and manufacture of detergent ingredients and their formulation into finished products.
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