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- A surface water treatment plant operates round the clock with a flow rate of 35 m³/min. The water temperature is 15 °C and jar testing indicated an alum dosage of 25 mg/1 with flocculation at a Gt value of 4x104 producing optimal result. The alum quantity required for 30 days (in kg) of operation of the plant isA municipal waste water has a BOD5 of 200 mg/L at 20 ˚C. The reaction rate constant k at 20 ˚C is 0.23 day-1.[5] a. calculate the ultimate CBOD.[5] b. calculate BOD5 at 15 ˚C.The aeration tank influent flows at a rate of 1600 cu.m/day with BOD(biochemical oxygen demand) of 145 mg/L. The MLSS is around 200 mg/L. If the capacity of the aeration tank is 2000 cu.m, determine which of the following statements is true. a) The aeration tank is not operating in an ideal condition; there are excess bacteria that might go with the treated water b) The aeration tank is operating in good condition; BOD and bacteria are in ideal balance c) The aeration tank is operating in good condition; however, there is a need to control the flow rate of the feed d) The aeration tank is not operating in an ideal condition; need to add more bacteria to treat excess BOD
- The wastewater from a synthetic textile manufacturing plant is discharged to a municipal treatment plant for processing with domestic wastewater. The characteristics of the synthetic textile wastewater are 1500 mg/L BOD, 2000 mg/L SS, 30 mg/L nitrogen, and no phosphorus. The characteristics of the domestic wastewater are 200 mg/L BOD, 240 mg/L SS, 35 mg/L nitrogen, and 7 mg/L phosphorus. Find the BOD, SS of the mixture. The ratio of flow rate is domestic/textile = 4/1Please asap... One air emissions treatment (system) requires a removal rate of 98.5%. It is known that there is a cyclone dust collector before the electrostatic precipitator, and its efficiency is 60%. What is the efficiency of the electrostatic precipitator?Given the following pump data: 10 ft-positive suction head, 198 ft - discharge head, 16 ft- friction loss, 421 gpm - flow, Motor eff. Is 80% and Pump eff. Is 90%. What is the bhp? O23.10 bhp O 25.47 bhp O 26.53 bhp O24.16 bhp
- A surface water treatment plant operates round the clock with a flow rate of 35 m³/min. The water temperature is 15 °C and jar testing indicated an alum dosage of 25 mg/l with flocculation at a Gt value of 4 × 10ª producing optimal results. The alum quantity required for 30 days (in kg) of operation of the plant isA surface water treatment plant operates round the clock with a flaw rate of 35 m3/min. The water temperature is 15°C and Jar testing indicated and alum dosage of 25 mg/l with flocculation at a Gt value of 4 x 104 producing optimal results. The alum quantity required for 30 days (in kg) of operation of the plant isA complete mix activated sludge process is to be used for biological treatment. This plant receives 10,000 m³ of wastewater per day with BOD loading of 250 mg/L. The primary treatment efficiency is 25%. Assume the followings: ● ● -4- Plant effluent BOD5 = 12 mg/L Biomass yield = 0.54 kg biomass / kg BOD Endogenous decay rate=0.05 day-¹ Solids Retention Time = 8 days MLVSS concentration in the aeration tank = 2,700 mg/L Waste and recycle solids concentration = 12,000 mg/L Determine the followings: (i). The hydraulic detention time in hours. (ii). The aeration tank volume in cubic meters. ...4/- SULIT EAP582
- A cyclone is designed to collect dusts. Increasing gas flow rate at the inlet can increase the efficiency without changing the cyclone. How much must the flowrate increase in volume flow if the critical particle diameter is reduced to half?A water-treatment plant is to process 30,000 m³/d. The rapid mixing tank will blend 35mg/l of alum with the flow and is to have a detention time of 2 min. The tank is to have a square cross-section with vertical baffles and a flat blade impeller. Determine the following: (a) Quantity (Kilograms per day) of alum added (b) Dimensions of the tank (c) Power input (kilowatts) necessary for a G value of 900 sec¹ Use dynamic viscosity of 1.139 10 Pa secQuestion 1 If the waste with BOD4-30 equal 150 mg/l and K1-20 0.23/day is discharge to a stream At an average temperature 30 C.0 = 1.047 A. compute the BOD would de exerted in 5 days at temperature 20 and 30 C (BODS-30, BODS-10). 8. compute the organic loading in (kg/day) for BOD 5-20 lf the flow rate 35 m3/1 Question 2 if the waste with ultimate BOD, equal 190 mg/L and K 1-20 0.23/day is discharge to a stream at an average temperature 25°C. a. compute the BOD would be exerted In 3 and 5 days at temperature 20 and 25° C, (BOD3-20), BOD 5-20, (BOD 3-25 ), BOD -25 ? b.compute the organic loading in (kg/day) for BOD 5-20 If the flow rate 50 m3/h? Question 3 بحبواب uses a single stage rock-media trickling filter for Secondary treatment, A wastewater treatment plant flow rate 2000m3/day concentration of BOD in raw sewage = 400 mg/! 30% BOD removed in primary sed. volume of filter = 169.65 m3. direct recirculation pump operates at 2.78 m3/min to the filter fined the efficiency of T.F and the…