37 MLD WATER TREATMENT PLANT
The infrastructures for the distribution of increased water supply are more or less now in place and in readiness. It is a fact that the current quantity of water supply from water sources, particularly through Greater Aizawl Water Supply Phase I & II shall not support the projected population for 2048. Therefore, a venture to establish a new water treatment plant was initiated at the Industrial Growth Center from the Tlawng River. This new facility will provide an extra 37 million liters of water per day into the city, more than doubling the current amount which stands at 34 MLD.
WATER SUPPLY DISTRIBUTION NETWORK AND FEEDER MAINS
The population of the city for the year 2048 is estimated at 5,57,000 souls. The programme aims not only to facilitate the projected increase in consumption due to increased population but to ensure greater efficiency in the distribution of water throughout the city. Achievements have been made in this regard by reducing the amount of time required for filling Zonal Reservoirs:-
• Duration of filling 7th Day Tlang Reservoir (16.47 lakh litres) reduced from 40 hrs to 9 hrs.
• Duration of filling Luangmual Reservoir (2.12 lakh litres) reduced from 9 hrs to 4 hrs.
• Duration of filling ChaltlangReservoir (6 lakh litres) reduced from 7 hrs to 3.5 hrs.
Concurrent to the Zonal Reservoirs being filled at reduced duration, the frequency for water supply to consumers has also greatly improved:-
• From 18 days to 4 days at Govt. Complex.
• From 18 days to 7 days at 7th Day Tlang.
• From 16 days to 9 days at Chaltlang.
• From 7 days to 3 days at Mission Veng.
SCADA SYSTEM
Advancement in technology has enabled the luxury for real time monitoring of the quality and quantity of water and the energy consumed during operation.
WATER METERS AND FLOW METERS
SIPMIU working together with PHED has installed 35,000 water meters to facilitate a reliable record of water distributed to the public. As many as 55 Bulk Flow meters are also installed to provide a systematic and reliable record of the water pumped ‘in’ and ‘out’ flow from the main water reservoir.
ELECTRO-CHOLRINATORS
The current water supply system of pumping water from the river Tlawng under Greater Aizawl Water Supply Scheme Phase I & II is treated with chlorine in the treatment plant. However, the fact remains that some Residual Chlorine is lost while public distribution. This loss of chlorine level during the distribution of treated water from the Main Reservoir at Tuikhuahtlang to Zonal Reservoirs is supplemented by introducing Electro-Chlorinator at strategic points in Laipuitlang and Chanmar
132 kV DEDICATED SUB STATION
Located at Dihmunzawl within the vicinity of the Greater Aizawl Water Supply Phase I & II, a dedicated sub-station has been constructed to provide uninterrupted power for the pumping of water into the city. Currently, the Greater Aizawl Water Supply Phase I & II are running on either extremely low power or on diesel fueled engines which drastically cause increased operational cost.
RESERVIORS
Long term usage of steel tanks scattered within the city was found to be worn out and rusting. The structural integrity of the tanks in some instances was found to be compromised and the necessity
