Palm oil processing operation is invariably accompanied by the discharge of a substantial amount of palm oil mill effluent (POME) which is recognised as an environmental pollutant by the Department of Environment (DOE). The conventional practice of anaerobic digestion and the recently developed tertiary treatment technologies (aerobic) of POME are able to meet the current regulatory effluent discharge requirement of biological oxygen demand (BOD) at below 100 mg litre^-1. The Malaysian palm oil processing techniques has been undergoing evolutionary changes over the past few decades and is still progressing, thus assuring the nation of healthy competiveness of the palm products in the world edible oil market.