The Tamil Nadu Pollution Control Board has asked those running the Common Effluent Treatment Plant (CETP) at Karaipudur here to utilise all the equipment installed for achieving zero liquid discharge (ZLD) norms at appropriate cycles or face closure.

Board District Environmental Engineer R. Kannan told The Hindu that instructions were given to the effluent plant owners after it was noticed during one of the recent inspections that treated effluents were yet to reach the evaporator and Reverse Osmosis (RO) appliances even though it had been lying in the storage tank.