Most of the methodology in practice throughout Malaysia for the treatment of effluent will not be able to survive the demands of 2lst century. The laws on preserving environment are getting more and more stringent and it is about time the industry takes a good look at what can be done instead of waiting for the last moment. The conventional biological system consisting of anaerohic, aerobic or facultative process, if well operated and maintained may meet today’s discharge standards stipulated by the Department of Environment (DOE) for certain areas but not where there is large concentration of population. It is only a matter of time before the standards are increased to meet world standards.