Study of SCADA based Existing Water Treatment Plant-GAWSS Phase-I in Mizoram, India

Mizoram is a hilly state in India and unlike other states most of the water pumping is done through high head pumping, hence providing available drinking water throughout the year is a government priority. Under Public Health Engineering department, there is a Greater Aizawl Water Supply schemes phase I (GAWSS p-I) implemented in 1988 with a capacity of 10.8 MLD of treated water in the clear water reservoir. This water supply scheme consists of four major components:(1) Intake Pump House near Tlawng river, (2) Water Treatment Plant (WTP) with clear water pump house, (3) Intermediate Pumping Station (IPS) at Lawipu & (4) Clear Water Reservoir at Tuikhuahtlang. SCADA system has been implemented in the existing water treatment plant (GAWSS p-I) in 2020 generally for monitoring and improving the plant efficiency. Data such as Water quality (using pH, turbidity and chlorine analyser) and water quantity at each pumping stations (using electromagnetic flowmeter and ultrasonic level and pressure analyser) are collected continuously through programmable logic controller (PLC) and monitored online from the central SCADA station. This paper describes study of the whole utility process of SCADA based WTP in Aizawl and how the backwash scheduling is done using SCADA system.