Abstract

Solid coconut waste (SCW) is a by-product of coconut milk production which still contains virgin coconut oil (VCO). This waste usually is thrown away or left in fields. This study aims to optimize the effects of Microwave power (80–400 W), irradiation time (1–4 minutes), and solvent to feed ratio (SF) (10–30 ml/g) on the extraction of VCO from SCW using microwave-assisted extraction. The optimized conditions were microwave power: 160 W, Irradiation time: 2.5 minutes, and SF: 30 ml/g (15.93% yield). After the extraction, the characteristics of the oil such as matters volatile at 105 °C (0.193%), Free Fatty Acid (FFA) (1.38%), peroxide value (undetectable), insoluble impurities (0.0015%), saponification value (258 mg/g), iodine value (7.60), specific gravity at 30 °C (0.918), and total plate count (0 CFU/ml) were determined. The second-order kinetic model described the extraction the best (R²_adj = 0.9994). This method proves to be more efficient than the conventional virgin coconut oil extraction method.

摘要

固体椰子废料 (SCW) 是椰奶生产的副产品，其中仍含有初榨椰子油 (VCO)。这种废物通常被扔掉或留在田里。本研究旨在优化微波功率 (80–400 W)、辐照时间 (1–4 分钟) 和溶剂与进料比 (SF) (10–30 ml/g) 对从 SCW 中提取 VCO 的影响微波辅助提取。优化条件为微波功率：160 W，照射时间：2.5 分钟，SF：30 ml/g（15.93% 产率）。提取后的油品特性如105℃挥发物（0.193%）、游离脂肪酸（FFA）（1.38%）、过氧化值（检测不到）、不溶性杂质（0.0015%）、皂化值（258 mg/g)、碘值 (7.60)、30 °C 下的比重 (0.918) 和总平板计数 (0 CFU/ml)。²调整= 0.9994）_。这种方法被证明比传统的初榨椰子油提取方法更有效。