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A wastewater treatment plant, which serves a population of 300,000 people, receives an average daily volume...


A wastewater treatment plant, which serves a population of 300,000 people, receives an average daily volume of 24 million gal
4. What is the average influent total dissolved solids (TDS) concentration if the average influent total solids (TS) concentr
8. What is the plant combined primary and secondary treatment process average BOD removal efficiency if the final effluent di
A wastewater treatment plant, which serves a population of 300,000 people, receives an average daily volume of 24 million gallons per day (MGD) at an average influent 5-day biochemical oxygen demand concentration of 200 mgBODs/L and an average influent total suspended solids concentration of 220 mgTSS/L. The plant operates a primary sedimentation process that remove 65% of the incoming TSS and 35% of the incoming BOD %. This process is followed by a secondary treatment process before discharge to the local waters.
4. What is the average influent total dissolved solids (TDS) concentration if the average influent total solids (TS) concentration is measured at 650 mg/L? (answer will be given in the unit of ( TS) 5. Is it expected that the primary sedimentation process removes the solids that are measured as TDS? (answer will be given as yes or no) 6. What is the expected primary sedimentation process average effluent TSS concentration? (answer will be given in the unit of )) 7. What is the expected primary sedimentation process average effluent BOD concentration? (answer will be given in the unit of (aho))
8. What is the plant combined primary and secondary treatment process average BOD removal efficiency if the final effluent discharged in the local waters has a concentration of 12 mgBOD/LP (answer will be given in removal) 9. What is plant average BOD, loading? answer will be given in the unit of 10. Knowing the primary treatment BODs removal efficiency and the plant combined primary and secondary BODs removal efficiency. How much BODs is removed during secondary treatment every day? (answer will be given in ( o )) 11. The biomass is quantified in terms of volatile suspended solids concentration (VSS). For example, if the content of a biological reactor has a VSS concentration of 2000 mgVSS/L, it is estimated that there is 2,000 mg of biomass per Liter of reactor. With that said, what will be the expected secondary treatment biomass production if the net biomass yield is 0.3 lb VSS/lb of BODs removed)? (answer will be given in (6 )
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Tele BODs influent to primary sedimentation tank = abo ng Robslu 200 mg Bons la TSS influent to P.S = d20 mg TSS/ Removal eff= 7. Primary sedimentation process average effluent BODS Concentration = (-0.35)200 = 130 mg BODsle = B. BODS removal efficie

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