ECONOMICAL OPERATION OF ZLD IN TEXTILES INDUSTRY

Why is there a need of ZLD in Textiles Industry? ZLD Policy implemented by central pollution control board which requires industry to install ZLD systems in their units if discharge parameters are not within limits. Non-availability of desired quality of fresh water due to declining ground water table and contamination of available water sources. Advantages of Hyper ZLD Highest Recovery of 95-98 %Fully Automated System and Minimum ManpowerNo Chemical Treatment RequiredZero Chemical SludgeLowest steam and power consumptionLowest operation CostCustomized SolutionsNo space restrictionSalt recovery system to produce pure salt to be reused back in Process

Equalization and Effluent cooling Equalization refers to homogeneous mixing of effluent in order to get consistent parameters of effluent. Effluent cooling refers to cooling of effluent using cooling towers in order to reduce the temperature of incoming effluent below 38 Deg Celsius. Biological Treatment Biological Treatment refers to removal of BOD and COD in wastewater biologically i.e. using bacteria in presence/absence of air. There are various type of biological treatment. But the fore most technologyy in this area : MBR (Membrane Biological The sludge generation is minimum in biological treatment if designed and operated properly. Photo-chemical Oxidation Physio-chemical treatment refers to removal of high organic load using OH ions as oxidizing agent which have maximum oxidation potential. The Treatment involves use of ozone and UV/Hydrogen Peroxide to produce highly oxidizing agents which highly reduce organic load considerably. There is minimum generation and less to negligible chemical consumption.

Membrane Purification Membrane Purification refers to removal of TDS (Dissolved Solids) using Membrane technology. We focus on maximum recovery using Membrane technology with minimum 93-97 % recovery to get maximum permeate of desired parameters to be reused in process. The technology focuses on maximum recovery with very less reject of < 5 percent. Multi-Effect Evaporator with Dryer In this, Final RO reject is feed to MEE for evaporation of concentrated reject. The efficiency of MEE depends on Feed parameters of RO Reject. If TDS of RO Reject is low i.e. recovery of membrane purification system is low; There will be high steam consumption resulting in inefficient ZLD. Salt dryers is used at MEE reject to get dried salts for total zero liquid discharge.