All of the following are methods of sewage disposal except
Sewage is waste-water from a community, containing solid and liquid excreta, derived from houses, street and yard washings, factories, and industries. It resembles diy water with an unpleasant smell. Modern sewage treatment plants are now available for sewage purification based on biological principlesOther methods of sewage disposal Sea outfallRiver outfallLand treatmentOxidation pondsOxidation ditchesRef: Park; 23rd ed; Pg 765
River outfall
Land treatment
Oxidation ponds
Bangalore method (composting)
Environment and health