Meaning of Mal in English. How does Sewage look like

Sewage is a waste product which is carried by an aqueduct from a house or industrial facility to be recycled or disposed to a non-toxic version. Sewage is greater than 99% water but the rest of the material is solid matter, ions as well as harmful microbes. The matter has to be removed from the water using an filtration process before wastewater can be discharged back to a natural source of water.