Zero Liquid discharge for the Industrial sector by Amit Udgirkar Sr. Manager Environmental Engineering Praj Industries Ltd
Major Concerns... Where is the space for process plant??? Reduce Foot Print
Major Concerns... Can I use treated wastewater somewhere??? Recycle & Reuse of Treated Wastewater
Major Concerns... Can I avoid liquid discharge??? Zero Liquid Discharge (ZLD)
Major Concerns... Can I generate/save energy??? Energy Recovery & Maximization of Energy Efficiency
Water & Wastewater Solution
Solution... Selection of Appropriate Technologies Integrated Design Approach Solution under one roof
Zero Discharge usage in Industry
How to Achieve ZLD... STEP 1 Effluent after Solvent recovery Recovery of solvents by using distillation Process
How to Achieve ZLD... STEP 2 Raw Effluent from Industry Removal of Organic Matter by Using Anaerobic Digestion
How to Achieve ZLD... STEP 3 Anaerobically Treated Effluent Removal of Balance Organic Matter by Using Aerobic Digestion
How to Achieve ZLD... STEP 4 Treated Effluent from ETP Clarification by using, tube settler/clariflocculator
How to Achieve ZLD... STEP 5 Effluent after Clarification Further Reduction in TSS by using Filters
How to Achieve ZLD... STEP 6 Effluent after Filters Reduction in Turbidity and SDI by using Ultra Filtration
How to Achieve ZLD... STEP 7 Effluent after UF Recovery of low TDS Permeate by using RO
How to Achieve ZLD... STEP 8 High TDS Rejects from RO Concentration of RO Rejects by using battery of evaporators
How to Achieve ZLD... STEP 9 High TDS Rejects from RO Separation of salts from Mother Liquor using centrifuge / dryer
Key Challenges in ZLD... High Recovery through RO to reduce load on Evaporation system Highly Corrosive Effluent Material Compatibility at Higher Temperature High Capital Investment Operating Cost for the treatment Turnkey Responsibility
How to Address the Challenges High Recovery through RO - Use of Proper & robust Pre-treatment - Right Selection of Membranes and RO Configuration Material Compatibility at Higher Temperature - Operate Evaporation System at low temperature High Capital Investment - Use various combination of Evaporators Operating Cost for the treatment - Use innovative approach like TVR or MVR
Solutions.. Conventional Falling Film Evaporator Forced Circulation Evaporator Forced Falling Film Evaporator Fluidized Bed Patented Evaporator
Falling Film STEAM VAPORS COND. FEED
Falling Film - Features Better Heat Transfer Coefficient. Low Power consumption. Can be started up quickly and changed to cleaning mode. Useful in heat sensitive chemical solutions
Falling Film - Limitations Not suitable at higher suspended solid concentration and higher viscosity. Distribution system is critical and can lead to tube fouling in absence of adequate wetting rate. Frequent C.I.P. Required.
Force Circulation STEAM VAPORS FEED CONDENSATE CONC. PRODUCT
Force Circulation - Features Capable of handling Suspended slurry, Saturated solution & viscous liquids. Can be operated with min temperature differences between the heating media and the boiling liquid. No frequent Scale inside the tubes. Can be installed vertically as well as horizontally.
Force Falling Film LIQUOR IN SHOWER NOZZLE DISTRIBUTOR LIQUOR FILM Tube Wall FALLING FILM UPPER MAIN LIQUOR BOX Condensed Steam Or Vapor On Outside Wall Of Tube LIQUOR VAPOR
Force Falling Film Features All advantages of conventional falling film Evaporation. Comparatively less problem of tube wetting rate due to Spraying Nozzles. Less prone to fouling as compared with Conventional Falling Film Evaporator.
Flubex As an alternative to Forced Circulation or in Combination Flubex- Concept Recirculating fluidized bed heat exchanger Evaporation by Flashing in Vapor Liquid Separator. Fluidizing medium in Tube.
Flubex As an alternative to Forced Circulation or in Combination
Flubex Advantages Continuous self-cleaning action avoid scaling. No Frequent C.I.P. Less generation & disposal problem of C.I.P. Effluent. No standby unit required. Lesser floor space.
Flubex Installation
MEE Installation Distillation followed by Forced Circulation Evaporator based on MVR Technology - Installation
MEE Installation MEE for Textile Effluent at Veerapandi, TN
MEE Installation Cilion Inc. USA Swan Hill Ethanol Co ltd, Australia Biowanze S.A., Belgium Thai Sugar Ethanol Co ltd, Thailand Profex Bio Products Ltd, Bulgeria Bannari Amman, TN EID Parry, TN Shaw Wallace Gelatines Ltd, Jabalpur India Cadburys India Ltd Orchid Pharma Gujrat Ambuja, India Unicorn Organics Ltd, India Benzochem, India
Other Technologies
Ammonia Stripping
Solution Under One Roof More than 500 references in 50 countries
Web: www.praj.net info@praj.net pben@praj.net Sustainable solution for Sustainable Environment