PLC Waste Water Treatment Plant Capacity 500 KLD, The proposed automation solution for waste water treatment plant involves the use of a series of small control systems that run the facility, PLC (Programmable Logic Controller) continuously monitors the operation of pumps, closures, and other devices, and collects and executes commands.Wastewater treatment plants serve as a critical component of modern society, protecting the public from pollutants that may be present in sewage and effluent from industrial operations. The most widely used method of wastewater treatment is biological treatment using bacteria to break down organic wastes. Properly treated wastewater is returned to the environment for reuse.A wastewater treatment plant generally consists of primary, secondary, and sometimes even tertiary treatment. For example, in most municipal sewage treatment plants the primary treatment consists of sedimentation tanks; the secondary treatment means microbiological decomposition or bio-decomposition. Further stages may include microfiltration, ultrafiltration, or nanofiltration for the removal of micro-organic particles or ion exchange for hardness or heavy metal ions or activated carbon for organic molecules.