Impact of biodiesel production on wastewater generation

ABSTRACT Biodiesel production has intensified in recent years and the traditionally applied method for its is homogeneous alkaline transesterification, with formation of esters glycerol, which need to be separated. Also, crude biodiesel needs purified at end reaction remove remaining catalyst, soap, oil, alcohol, can impair engine performance. This process generates large quantities wastewater that properly disposed avoid polluting environment. article provides a review purification step, focusing on generation. Traditional advanced methods treating originating from are described discussed. Details regarding patents published past 5 years, related techniques treatment these wastewaters, also included.