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                            [content] => - The study explores a method for decolorizing crude glycerol from biodiesel production, utilizing waste cooking oil, and employs a combination of physico-chemical treatment and activated carbon from oil palm biomass. *! 
- Results showed over 89% color removal and more than 98% increase in glycerol content, achieving a clear solution by removing harmful substances like methanol and triglycerides, and meeting quality standards. *! 
- Economic analysis indicates a starting capital of about USD 13,200 with annual operating costs around USD 79,902, leading to a cost of approximately USD 5.38 per liter of glycerol, significantly cheaper than using commercial activated carbon by about 69%. *!
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