<prompt> What is Strong sewage?Biological oxygen demand 300 mgLBiological oxygen demand 200 mgLBiological oxygen demand 250 mgLBiological oxygen demand 150 mgL  <response>: SEWAGE: Contain 99.9 water. Contamination Strength of sewage is calculated by Biological oxygen demandChemical oxygen demandSuspended solids. BOD 300 gl, it is ka strong sewage Suspended solids 500 mgL - STRONG SEWAGE EXTRA EDGE: Waste Disposal: - Refuse - Solid waste from living room street industry - Garbage - Solid waste from kitchen - Solid wastes -shouldnt contain Night soil - Sewage - Liquid waste with human excreta. Feco-oral diseases transmits through this. It doesnt contain night-soil. - Sullage - Liquid waste without human excreta. 