UTILIZATION OF AGRO-INDUSTRIAL WASTE FOR DATE PALM AS LOW-COST BY-PRODUCTS AND HIGH NUTRITIONAL VALUE.

The goal of the current study was to assess the nutritional value,
antioxidant content and antioxidant activity of date kernels and palm fronds
and their effect on oil stability. Total phenolic compounds, tannins and αtocopherol were determined and DPPH radical-scavenging activity was
examined. Polyphenolic substances were identified by HPLC. BHT and tannic
acid as synthetic antioxidant agents, in addition to aqueous and ethanolic
extracts of date kernels and palm fronds, as natural antioxidants were added to
edible mixed oil at concentrations of 100, 200 and 500ppm and heated daily at
80°C for 5 hours for 7days, then the stability of oil was assessed by acid value,
peroxide value, TBARS and iodine number. The Economics of date palm
kernel waste also was evaluated. The findings showed that date kernels had
greater total phenol content than those of date palm fronds and palm fronds
also had much higher concentrations of tannins and tocopherol. According to
HPLC-based polyphenol fractionation, vanilne, resorcinol and syringic acid
made up the bulk of palm fronds. The findings suggested that the heat stability
of both synthetic and natural antioxidants improved the stability and properties
of oil after being heated daily at 80°C, for 5 hours for 7 days.
The present study concluded that adding natural antioxidants obtained
from date kernels and palm frond could lengthen the shelf life of oil. They
were also risk-free and have numerous dietary applications, as alternative
natural antioxidants