Abstract
The application of high hydrostatic pressure (HHP) processing of food to extracting lycopene from tomato paste waste was studied. Various experimental conditions of HHP processing process, such as solvents (chloroform, 95% ethanol and distilled water), ethanol concentration (45–95%, v/v), pressure (100–600 MPa), duration (1–10 min) and solid/liquid ratio (1:1 to 1:8 g/ml), were investigated to optimize the extraction process. The experimental results of HHP showed that more lycopene can be extracted from tomato paste waste in only 1 min at room temperature without any heating process. The highest recovery (92%) was obtained by performing the extractions at 500 MPa pressure, 1 min duration, 75% ethanol concentration, and 1:6 (g/ml) solid/liquid ratio. From the viewpoints of extraction time, the extraction yield and the extraction efficiency, extraction by HHP shows a bright prospect for extracting lycopene from tomato paste waste.
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