Wastewater Treatment System Operation and Maintenance Manual PDF

GPP-5 I.A.-3 Operation and Maintenance Manual 01 FUNCTION 01.1 Scope of the Unit The Wastewater Treatment System receives waste water from the following general sources: − The Continuously Oil Contaminated (COC) Drains − Chemical Contaminated Wastewater − Condensate/Water Separator − Chloride...

GPP-5 I.A.-3 Operation and Maintenance Manual 01 FUNCTION 01.1 Scope of the Unit The Wastewater Treatment System receives waste water from the following general sources: − The Continuously Oil Contaminated (COC) Drains − Chemical Contaminated Wastewater − Condensate/Water Separator − Chloride Scrubbing Operations − Process Vessel Water Boots − Process Vessel Knockout Drums − Wet Drain Drums − Boiler Blowdown (and unrecoverable steam trap drains) − Filter Backwash − Reverse Osmosis Unit Reject Water − Deionization Unit Regeneration Waste Water − Utility Systems Drains This waste water is treated to remove contaminants, oil and suspended solids and to adjust the pH and the BOD to the levels shown below: Temperature pH BOD5 at 20° COD Suspended Solids Mercury Cadmium Chromium, hexavalent Arsenic Cyanide Lead Chromium, trivalent Copper Manganese Nickel Tin Zinc Boron Iron Phenol Free Chlorine Sulphide Oil & grease Max 40°C 5.5 - 9.0 50 mg/l 100 mg/l 100 mg/l 0.05 mg/l 0.02 mg/l 0.05 mg/l 0.10 mg/l 0.10 mg/l 0.5 mg/l 1.0 mg/l 1.0 mg/l 1.0 mg/l 1.0 mg/l 1.0 mg/l 1.0 mg/l 4.0 mg/l 5.0 mg/l 1.0 mg/l 2.0 mg/l 0.5 mg/l 10.0 mg/l Treated waste water is then discharged to the outfall via an automatic composite sampler, pH monitoring and a flow totalising system. Should the treated water quality not meet specification, the outflow from the wastewater treatment system can be diverted to the Holding Pond T5/6-1018, where it can be returned into the system for re-treatment. Unit 10 - Waste Water Treatment 5B10_3X1.doc Function / Page 1 of 2 Rev.01 GPP-5 I.A.-3 Operation and Maintenance Manual Equipment is arranged such that there is one wastewater treatment system each for GPP5 and for GPP6 plus some shared (5/6) facilities. Equipment drainage and wastewater from DPCU#3 are forwarded to either the GPP5 or the GPP6 wastewater treatment facility. Unit 10 - Waste Water Treatment 5B10_3X1.doc Function / Page 2 of 2 Rev.01 GPP-5 I.A.-3 Operation and Maintenance Manual 02 DESIGN 02.1 Equipment List Equipment in this section include: A5-1001 A5-1002 A5-1005 A5-1006 A5-1007 A5-1008 A5-1009 P5-1001A/B P5-1002A-D P5-1004A-C P5-1005A/B P5-1007A/B P5-1008A/B P5-1009A/B P5-1012A/B P5-1013A/B P5-1014A/B T5-1001 T5-1002A/B T5-1003 T5-1004 T5-1007 T5-1008 T5-1009 T5-1010 T5-1011A/B T5-1013A/B T5-1014 T5-1016 T5-1017 02.2 Arsenic Removal Unit Flotation Treatment Unit Wastewater Filter Unit Sludge Filter Unit CPI Separator Unit Aerator Unit Clarifier Unit Chloride Scrubber Wastewater Pumps Preseparator Pumps CPI Feed Pumps Oil Sump Pumps Slop Oil H.C. Transfer Pumps Sludge Pumps Clear Water Pumps Skimmed Oil Pumps Wastewater Sump Pumps Sludge Sump Pumps Chloride Scrubber Wastewater Pit Preseparators Oil Sump Sludge Sump Slop Oil Separator Equalization Tank Skimmed Oil Tank Filter Backwash Tank Aeration Basins Wastewater Sludge Sumps Clear Water Sump Wastewater Sump Splitter Box Design General Information The Wastewater Treatment Unit is designed to treat wastewater from various sources to provide effluent that meet discharge regulations. Unit 10 - Waste Water Treatment 5B10_3X1.doc Design / Page 1 of 2 Rev.01