THE EARTH HAS PLENTY OF WATER, BUT 97\% IS TOO SALTY FOR HUMAN USE. THE REMAINING 3% IS FRESH WATER, BUT ONLY 0.3\% OF THIS FRESH WATER IS AVAILABLE FOR DIRECT HUMAN USE. DUE TO CONTINUAL POPULATION GROWTH, AGRICULTURAL AND INDUSTRIAL DEVELOPMENTS, AND CLIMATE CHANGE EFFECTS, WATER RESOURCES SCARCITY HAS BECOME A CRITICAL ISSUE IN MANY PARTS OF THE WORLD. WATER RECLAMATION AND REUSE IN INDUSTRIES IS BECOMING AN IMPORTANT PART OF THE WATER SUPPLY PORTFOLIO AS WASTEWATER IS A RELIABLE AND SUSTAINABLE WATER SOURCE. THE PETROLEUM PROCESSING FACILITIES, INCLUDING REFINERIES AND PETROCHEMICAL PLANTS, USUALLY CONSUME A LARGE QUANTITY OF WATER. THE WASTEWATER MUST BE WELL-TREATED PRIOR TO BEING DISCHARGED TO THE ENVIRONMENT. IN THE RECENT YEARS WORLDWIDE, MANY INDUSTRIES HAVE EMERGED MANY TECHNOLOGIES IN WATER REUSE. REFINERIES MAY REUSE ITS WASTEWATER FOR COOLING AND BOILER FEED, BUT VERY MINIMUM. WITH THE POPULATION GROWTH HAS CAUSED PETROLEUM FACILITIES TO SERIOUSLY CONSIDER REUSE OF EFFLUENT TO IMPROVE THE LONG-TERM RELIABILITY OF WATER SUPPLY. AS AN ENVIRONMENTAL ENGINEERING CONSULTANT, YOU HAVE BEEN INVITED BY PETROLEUM CRUDE PROCESSING PLANT TO SUBMIT A PROPOSAL OF A COMPREHENSIVE INTEGRATED EFFLUENT TREATMENT STRATEGY (IIETS) AND SOLID WASTE (SCHEDULED WASTE) MANAGEMENT (ISWM) FOR THE PLANT WITH VOLUME RATE OF 56,000M 3
/D. THE RECLAMATION FOR BOILER FEED IS TARGETED TO BE MINIMUM OF 94%. - TO CONSIDER A MAJOR PROCESS UNIT DESIGN OF COMPLETE MIX ACTIVATED SLUDGE (CMAS) SYSTEM TO TREAT 56,000M 3
/D OF PRIMARY EFFLUENT (INCLUDING RECYCLE FLOWS) TO ACCOMPLISH: (A) BOD REMOVAL ONLY TO MEET A BOD CONCENTRATION LESS THAN 30G/M 3
(B) BOD REMOVAL WITH NITRIFICATION TO MEET BOD REMOVAL AND NITRIFICATION WITH AN EFFLUENT NH 4
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N CONCENTRATION OF 0.50G/M 3
AND BOD AND TSS <15G/M 3
. COMPARE THE TWO DESIGN CONDITIONS IN A SUMMARY TABLE. THE AERATION BASIN MIXED-LIQUOR TEMPERATURE IS 20 ∘
C