ZERO LIQUID DISCHARGE
ZLD, ZERO LIQUID DISCHARGE
GOVERNMENT MANDATE AND ENVIRONMENT CONCERNS ARE THE MAIN DRIVERS FOR ZLD NORMS TO BE ADOPTED.
THREE MAIN PROCESSS OF A ZLD ARE:
- EFFICIENT AND OPTIMALLY DESIGNED ETP: TO ACHIEVE BOD < 10 AND COD < 30 BY USING MBR OR IFAS ETC.
- RECYCLING & REUSE OF WATER: USING MEMBRANE TECHNOLOGIES LIKE RO, UF, NF ETC TO TREAT THE WATER FOR REUSE. THIS ESSENTIALLY SHOULD BE A HIGH RECOVERY SYSTEM. REJECTION SHOULD BE AS LOW AS POSSIBLE SO THAT EVAPORATION REQUIREMENT IS THE LEAST.
- EVAPORATION: THE REJECT FROM THE MEMBRANE SYSTEM SHOULD BE EVAPORATED AND DRIED USING MEE, MVRE ETC.
