Zero Liquid Discharge consists of industrial wastewater treatment processes developed to totally wipe out all liquid discharge from the industrial facility. A zero liquid discharge is a procedure that is beneficial to industrial and municipal governing bodies as well as the environment because it saves money and no liquid effluent, are discharged from the facility. ZLD systems employ the most advanced wastewater treatment technologies to purify and recycle virtually all of the wastewater produced

Features and Benefits:
• Zero Liquid Discharge (ZLD) is a series of processes (Like Membrane filtration, reverse osmosis, evaporation and crystallization) that extract pure water from industrial effluents, leaving behind sludge, dissolved solids, suspended particles and salt crystals.
• Pre-requisite for ZLD needs physical and chemical treatment and followed by biological system to remove organic load.
• The treated effluents can be subjected for concentration and evaporation.
• The concentration method quite often involves the adoption of Reverse Osmosis (RO) and Nano Filtration(NF) methods.
• The evaporation methods involve incineration/drying/evaporation of effluent in multi effect evaporators (MEE).

APPLICATIONS:
• Beverage & Distillery Industry
• Bakery & General Industries
• Tobacco Industries
• Honey Industries
• Pharmaceutical Industries
• Food Processing Industries
• Ice Creams
• Herbal Cosmetics
• Ultra Filtration System
• Reverse Osmosis System
• Sea Water RO System for High TDS
• Evaporation System

NEED OF ZLD:
• Most polluting industries such as Pharma, Pulp & Paper, Tanneries, Textile, Dyeing, Chemicals, Power Plants etc. generate wastewater with high salinity/TDS.
• Conventional ‘Physico – chemical biological’ treatment does not remove salinity from the treated effluent. The TDS content is well above the statutory limit.
• Discharge of saline but treated wastewater pollutes ground and surface waters. • TN has taken a lead on ZLD due ti absence of fully flowing perennial rivers.
• Main motivator – Water Scarcity, water economics, regulatory pressure.