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Innovative Technological Solutions for Wastewater Treatment and Disposal

Innovative Technological Solutions for Wastewater Treatment and Disposal. “ The significant problems we face today cannot be solved at the same level of thinking we were at when we created them ” Albert Einstein. WASTE MANAGEMENT HIERARCHY. Cleaner Production / Waste Minimisation

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Innovative Technological Solutions for Wastewater Treatment and Disposal

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  1. Innovative Technological Solutions for Wastewater Treatment and Disposal

  2. “The significant problems we face today cannot be solved at the same level of thinking we were at when we created them” Albert Einstein

  3. WASTE MANAGEMENT HIERARCHY Cleaner Production / Waste Minimisation Treatment Reuse / Recover / Recycle Disposal

  4. Challenges • Quality requirements • Energy requirements • Land requirements • Operation and Maintenance

  5. ADVANCED BIOLOGICAL TREATMENTS • Advanced Biological Treatments Include • Membrane Bioreactor (MBR) • Sequential Batch Reactor (SBR) • Moving Bed Bioreactor (MBBR) • Pure Oxygen Technology • Biological Heavy Metal Removal

  6. System Rate (kg BOD/m3.d) Typical Loading Removal Efficiency (%) Complete Mix ASP 0.3 – 1.6 85 - 92 Extended Aeration 0.1 – 0.3 95 -98 Membrane Bioreactor 1.8 – 5.7 96 - 99 Moving Bed Bioreactor 1.0 – 1.4 91 - 98 Sequencing Bioreactor 0.1 – 0.3 97 – 99 High Purity Oxygen 1.3 - 3.2 96 - 98 ADVANCED BIOLOGICAL TREATMENTS • Typical Volumetric Loading and Removal Efficiency for Various Systems

  7. REFINERY WASTEWATER BALANCE • FLOW TO CONVENTIONAL ETP : 750 M3/HR (435 M3/HR DISCHARGED AFTER TREATMENT ALONGWITH 66 M3/HR OF RO REJECT) • FLOW TO FILTRATION UNIT & UF : 315 M3/HR • UF PERMEATE : 315 M3/HR (218 M3/HR IS SUBJECTED TO RO & 97 M3/HR IS BLENDED WITH RO PERMEATE & EVENTUALLY USED FOR COOLING TOWER MAKE UP) • FLOW TO RO SYSTEM : 218 M3/HR • RO PERMEATE RECOVERED : 152 M3/HR BLENDED WITH UF PERMEATE & USED AS COOLING WATER MAKE UP • RO REJECT : 66 M3/HR IS DISCHARGED ALONGWITH BIOLOGICALLY TREATED WASTEWATER • WATER RECOVERED = 97 + 152 = 249 M3/HR USED AS COOLING TOWER MAKE UP

  8. DETAILS OF WASTEWATER TREATMENT - REFINERY PRELIMINARY TREATMENT UNITS FOR SPENT CAUSTIC - SPENT CAUSTIC TANK, REACTION TANK, H2O2 DOSING SYSTEM TREATMENT UNITS FOR COMBINED WASTEWATER • PRIMARY TREATMENT TERTIARY TREATMENT • IS SUMP - FILTER FEED / CHLORINATION SUMP • SS SUMP - DMF & ACF • SURGE TANKS - HRSCC • SPLITTER BOX - MULTIGRADE FILTER • API - BASKET STRAINER • TPI - ULTRA FILTRATION • DAF - REVERSE OSMOSIS • CHEMICAL DOSING SYSTEMS - CHEMICAL DOSING SYSTEM • SECONDARY TREATMENT • BIOTOWER FEED SUMP • BIOTOWER • AERATION TANK • SECONDARY CLARIFIER • GUARD POND • CHEMICAL DOSING SYSTEMS

  9. EMULSIONS PLANT- WATER BALANCE • TOTAL WATER REQUIREMENT - 253 M3/DAY • TOTAL EFFLUENT FROM PLANT FLOWING TO ETP -128 M3/DAY (Including reject from WTP RO) • PERMEATE RECOVERED FROM ETP – 99 M3/DAY (87 M3/DAY USED AS WTP FEED & 12 M3/DAY USED AS BOILER MAKE UP) • RO REJECT (28 M3/DAY) FROM ETP SUBJECTED TO EVPORATION (CONDENSATE RECOVERD : 28 M3/DAY USED AS WTP FEED) • SOLID WASTE FROM ETP (1 M3/DAY) & RMS : 0.5 TPD (85% DRY SOLIDS) FOR LANDFILL • LIQUID EFFLUENT DISCHARGE – ZERO • WATER RECOVERED = 127 M3/DAY, 115 M3/DAY USED AS WTP FEED & 12 M3/DAY USED AS BOILER FEED • FRESH RAW WATER REQUIREMENT - 126 M3/DAY

  10. FLOOR WASH 45 M3/D REJECT MANAGEMENT SYSTEM (RMS) 28 M3/D 10 M3/D DOMESTIC SOLIDS FOR DISPOSAL 28 M3/D CONDENSATE COOLING TOWER MAKE UP RAW WATER FROM BOREWELL 126 M3/D 103 M3/D 48 M3/D WATER TREATMENT PLANT (WTP) 87 M3/D 88 M3/D PROCESS & UTILITIES RO REJECT SLUDGE UF BACKWASH 3 M3/D PF BACKWASH MGF BACKWASH RO PERMEATE FOR 25 M3/D RO REJECT RO PERMEATE 6 M3/D 5 M3/D 11 M3/D RO PERMEATE TO BOILER MAKEUP 12 M3/D WASTEWATER TREATMENT PLANT (WWTP) 99 M3/D 15 M3/D BOILER & CT BLOWDOWN 8 M3/D DRY SLUDGE DOMESTIC EFFLUENT TO SECURED LANDFILL 1M3/D PROCESS EFFLUENT 55 M3/D WATER BALANCE DIAGRAM- EMUSIONS PLANT

  11. DETAILS OF WTP - EMULSIONS PLANT • - RAW WATER STORAGE TANK • - HRSCC • - PRESSURE SAND FILTER (PSF) • ULTRA VIOLET UNIT (UV) • REVERSE OSMOSIS UNIT (RO) • - CHEMICAL DOSING SYSTEM

  12. PVC PLANT – WATER BALANCE • TOTAL WATER REQUIREMENT - 4030 M3/DAY • TOTAL EFFLUENT FLOWING TO ETP - 3178 M3/D • 100 M3/D CTBD USED FOR GREEN BELT DIRECTLY • 250 M3/D NEUTRALISED DM REG. USED FOR GREEN BELT • 1070 M3/D OF UF PERMEATE RECYCLED TO DM PLANT • 1025 M3/D OF UF PERMEATE RECYCLED AS CT MAKEUP • 786 M3/D RO PERMEATE RECYCLED TO PROCESS • RO REJECT (197 M3/D) & SLUDGE (100 M3/D) FROM ETP SUBJECTED TO EVPORATION (290 M3/D OF CONDENSATE RECOVERED USED FOR PROCESS) • SOLIDWASTE FROM RMS : 5.8TPD (85% DRY SOLIDS) FOR LANDFILL • LIQUID EFFLUENT DISCHARGE – ZERO • WATER RECOVERED = 100+250+1070+1025+786+290 = 3521 M3/D • FRESH RAW WATER REQUIREMENT - 509 M3/D

  13. WATER RECOVERY PLANT FLOWSHEET FOR PVC PLANT

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