Sewage treatment is the process of removing contaminants from wastewater and household sewage water It includes physical, biological and sometimes chemical processes to remove pollutants. Its aim is to produce an environmentally safe sewage water, called effluent, and a solid waste, called sludge or biosolids, suitable for disposal or reuse. Tanks Direct offer a renge of Systems including the Klargester Biodisc which is the only packaged Sewage Treatment Plant which utilitises the Rotating Biological Contractor technology for small domestic applications.