Biology, 19.04.2021 19:20 blackoak6473

(07.04 LC) Primary treatment of wastewater includes
adding chlorine to disinfect water before it is discharged
implementing UV light to disinfect large solids that float to the top
introducing bacteria to the sewage to break down inorganic matter
using large- and small-holed screens to remove coarse solids

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(07.04 LC) Primary treatment of wastewater includes
adding chlorine to disinfect water before...