The primary purpose of preliminary treatment in a wastewater treatment plant is to remove large debris and inorganic solids from the incoming wastewater stream, protecting downstream equipment and processes. Wastewater, before treatment, contains a wide variety of materials – everything from human waste and food scraps to industrial chemicals and street runoff. Preliminary treatment is the first step in a multi-stage process designed to clean this water.
Specifically, preliminary treatment aims to prevent damage to pumps, screens, and other equipment used in subsequent treatment stages. Without this initial step, large o....
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