sewage

…

…The water flows in the tank where the chemical chlorine is added to kill bacteria. The chlorine is mostly eliminated as the bacteria are destroyed, but sometimes a neutralizing chemical must be added. This protests fish and wildlife which could be killed with a same amount of chlorine. The treated water is called effuent. This is discharged to a local river or the ocean. Like the Hudson, Harlem river an! d East river ------------------------------------------------------------------------ **Bibliography**