The Sewage Treatment Plants are used to perform sewage treatment is called sewage treatment plant. A sewage treatment plant on ship consists of a screen filter, primary chamber, aeration chamber, demisters, blowers, settlement and chlorination chamber. Sewage treatment is necessary to reduce the toxicity of sewage and maintain a safe and healthy environment, as well as promote human welfare. Microbial fuel cells are also used to generate electricity from wastewater. Microbial fuel cells utilize the organic matter from Sewage Treatment Plants.