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After effluent goes down the drain into a sewer, it goes to a sewage treatment plant. At the treatment plant the water is cleaned and returned to the environment.
Sewage is whats in the sewer. Sewage is human waste, water, and even rainwater which collects via a sewer and then gets transported through pipes underground to sewage plants.
its quite simple really. The sewage system takes all of the SEWAGE away while the drainage is the reason why its there in the first place. like DRAIN PIPE and SEWERS. Glad i could help. Dwyton Greer
There are basically two types of sewage treatment plants 1. Chemically treated - where chemicals are added to break down the effluents and disinfect it 2. Biologically treated - the effluent is broken down with the help of aerobic bacteria
Its Green for water Sky blue for air Black for effluent Brown for diesel Aluminum for staem Red for fire extinguisher There is difference between Indian standards and British standard colour coding