Sewage wastewater can also be converted via microbial fuel cells to decompose the waste organic material contained within it. Research has shown that MFCs can reduce the amount of organic material present in sewage wastewater up to 80% [3]. The process is very similar to brewery wastewater treatment, with the difference being that the water must first be pretreated to remove toxins and other non-biodegradable materials. This is a challenging step because sewage wastewater often varies in composition and may require extensive treatment before it can be cleaned by the MFC. However, this extensive treatment is justified by the electricity produced while cleaning the wastewater. The electricity production from MFCs will help to offset the high costs of processing wastewater [4]. Wastewater treatment plants could end up dumping fewer pollutants into oceans and rivers if the money saved from the electricity bill is put to work further cleansing the wastewater.