Extraction and encapsulation of essential oil from turmeric waste
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Date
2023-02-07
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Vasantrao Naik Marathwada Krishi Vidyapeeth, Parbhani
Abstract
The present study was conducted on extraction and encapsulation of essential oil from Turmeric waste (Curcuma lunga) var. shelam using a traditional technique i.e., hydro distillation and steam distillation for extraction and advance technique spray drying for encapsulation. A series of experiments were performed to investigate the effects of extraction method on extraction characteristics of essential oil from turmeric waste. Turmeric essential oil is susceptible to deterioration and chemically unstable when exposed to the environment, resulting in a loss of bioactive compounds and the development of off-flavours. Encapsulation was used to enhance shelf stability. So, study aimed to attempt the oil encapsulation, utilizing the spray drying technique by analysing the effect of emulsion parameters on encapsulated powder. An array of process parameters for maltodextrin (at oil concentrations 10, 20, and 30%) and soy protein isolate (at oil concentrations 10, 20, and 30%), were thoroughly investigated. The oil extraction results showed that for all parameters significantly influence (p < 0.05) by the change in extraction method. The hydro distillation processes gave better extraction yield as well as better extraction efficiency. Hydro distillation process resulted in oil yield of max 0.99% from dry turmeric waste whereas steam distillation gave max 0.78% oil yield. The results of encapsulation also observed to have significant influence (p < 0.05) on encapsulated powder quality characteristics. The encapsulation process with a maltodextrin at 10% oil load gave better best performance, resulting in the highest encapsulation efficiency (87.33±0.37%) with good functional characteristics (i.e., Moisture content, carr’s index, hausner ratio, wettability, solubility etc.).