SUSTAINABLE INDUSTRIAL WASTE WATER MANAGEMENT Jyoti Palekar STEP

SUSTAINABLE INDUSTRIAL WASTE WATER MANAGEMENT Jyoti Palekar - STEP Private Limited

Effective performance and Sustainability of wastewater management Facility: ü Optimum Design ü Installation as per design ü Receipt of waste as per design parameters ü Effective and efficient operation

Sustainability - What are the real Issues? ? Wastewater Generation and Conveyance 1. No control over quality, quantity and frequency of inlet wastewaters 2. Limited data base on characteristics & flows of wastewaters 3. Limited control / database on utility wastewater / washings and other non process related sources 4. No source segregation and treatment Technology Behavioural Issues 1. WWTP, the necessary evil / magic wand/ fit and forget approach 2. Over-ambitious loading without understanding the WWTP limitation 3. No integration of WWTP in the mainstream production excellence program 4. Limited O&M Budget 5. Impacts of targets on WWTP- Energy, water to production ratio 6. Skilled workforce availability 1. End of pipe approach 2. Limited consideration on technology selection inadequate study/ piloting of new technology 3. No consideration for source segregation/ pre-treatment 4. Limited technology application for sludge management and treatment of recalcitrant chemicals/ colours 5. Material of Construction (MOC)? ? Equipment specifications

Action Point-1 Assessing and managing water footprint- Water Audit Cost Saving: Reduction in volume of freshwater used for production and entire value chain Reduction in wastewater volumes and treatment costs Water Audits Key Components: 1. Identify water consumption sources and develop water balance 2. Measurement, Monitoring & Reporting of water footprint 3. Identify interventions for improvement of footprint, benchmark setting 4. Awareness and training

3 R principles in Water Footprint Recycle Increased financial investment Reclamation of treated effluent Increased utilization of resources Re-use Water reclaimed and used within process Reduce water usage through improved process/ equipment Add 1 S and 1 M in R 1 S (segregation) and 1 M (measuring) principles

Action point 2 Strategy for Wastewater Management…. Route of synthesis, Catalysis, Solvent/ Water, Reactor design, Batch continuous Product Yield Raw Materials + Solvent + Additive Products + Solvent + Water Productivity & Process Intensification Recovery and recycle In plant Recoveries Solvent/ By product recoveries Recovery Segregation of streams, Effluent treatment Effluent/ Treatment & reuse Destruction/ separation of materials Waste Management

Action point 3 Managing effluents………. Shift from end of pipe treatment to in-plant waste management Can I segregate effluents ? Good COD/ Bad COD What is the behaviour of molecule in aqueous environment Can a chemical be recovered & recycled or sold? Can the molecule/ process be replaced by green chemistry

ACTION POINT 4 RECOVERY OF CHEMICALS Recovery Methodology • Understand Chemicals/ solvents and its composition • Based on the composition and market value of the product, target the recovery • Carry out trials- Technology customization • Reuse /sell the chemical Dimethyl Formamid e 90% Recover y 20 % COD 35% NH 3 -N Methylene dichloride Aniline 98% Recover y 17% COD reductio n 98% Recover y 30% COD reductio n Adsorption using polymeric adsorbents – Separation of solvents/ metals/ chemicals Sodium Sulphate Sodium Carbonate Potassium carbonates/ Chloride/ Nitrates

Action Point 5 Removal/treatment of recalcitrant chemicals……. . Use of efficient Reactors Downflow Gas Contactor Condensates from MEE Leachates from landfill site Recalcitrant effluents Can be used as pre-treatment/ tertiary treatment

Action Point -6 Capability Development programs for effective operation and maintenance

Wastewater management will be effective and sustainable only if ……. ü Every Industry organises its own house by measuring and monitoring water usage & wastewater generation ü Continue to reduce water footprint…. changing processes, water conservation ü Enter into creative partnership with authorities , associations, educational institutes to develop cost effective solutions (transparency is the key). ü Verbund concept, common sludge management facility ü Looking at supplies and purchase…. Green chemistry, coagulants, adsorbents ü Innovations … technology, hardware ü Enhance O&M and conduct capability development programs What is the real issue? ? Technology? ? Hardware? ? Or behaviour? ?

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