Palm oil mill is one of the most important agro-industry in the South of Thailand. The oil palm
processing plant releases large amount of organic pollutant wastewater. Discharge of palm oil mill
wastewater without proper treatment will damage environment both in receiving water quality and
foul smell in the neighborhood of factory. Th
e proper wastewater treatment methods should take
advantage. Usually anaerobic stabilization ponds ar
e widely used for treatment of wastewater from
palm oil production because of their low capital
and operating cost. However, foul smell generated
from anaerobic ponds is disturbed the neighborhood community. Another efficient treatment
system is the closed anaerobic digester tank that becomes more popular at present. Furthermore,
biogas from the closed treatment system can be further utilized as fuel.