A local plant has a pancake type disinfection tank. Diameter is 15 m and height is 6 m. Flow of filtered water is 43 m3/min. To meet EPA regulation, plant should achieve 3 log inactivation of Giardia Cyst at pH 8 and 20 degree Celsius. Currently plant uses chlorine as primary disinfectant. (*Answers in whole number, No unit) Contact time? min CT value? mg-min/L Disinfectant concentration? mg/L

A local plant has a pancake type disinfection tank. Diameter is 15 m and height is 6 m. Flow of filtered water is 43 m3/min. To meet EPA regulation, plant should achieve 3 log inactivation of Giardia Cyst at pH 8 and 20 degree Celsius. Currently plant uses chlorine as primary disinfectant. (*Answers in whole number, No unit) Contact time? min CT value? mg-min/L Disinfectant concentration? mg/L

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

Design a trickling filter system for BOD removal without the nitrification requirement, to treat municipal wastewater with an average flow of 200 m3/d (Qin) and influent BOD of 200 mg/L and Ammonium (NH4-N) of 42 mg/L. Make appropriate assumptions and use the design indicators for plastic media filters as given below. What are the possible effects of the peak flow of 1.5 times occurring once in a month? Volumetric loading rate (Bv)= 0.5 kgBOD/m3.d Volumetric loading rate for NH4-N (Bv, NH4-N)= 0.2 kgNH4-N/m3.d Hydraulic loading rate (qh= Q/AR)= 1.2 m/h Recirculation ratio (Qr/Qin) = 0.5
The results of a jar test on a surface water supply sample revealed that the optimum dose of alum (Al2(SO4)3.14H2O) as coagulant is 17 mg/L. Furthermore, the water has total alkalinity = 50 mg/L as CaCO3; pH = 7.8; and residual turbidity at optimum alum dose = 4 NTU. The water treatment plant has a mean flow of 10m3/hour. Determine: The kg of alum per year needed in the operation of the plant. The residual alkalinity in the sample, following the addition of alum at optimum dose. Solve parts (a) and (b) if instead of alum, ferric chloride (FeCl3) were used as coagulant. Assume the numerical jar test results are the same as those with alum.
A rapidly mixed tank consists of a treatment unit used to disinfect a solution. The solution enters the 2000 m3 tank at a rate of 0.4 m3/s. The pollutant contains 7.94 CFU per liter and has no 0 mg/l of chlorine. The treatment unit uses a stock solution containing 750 mg/L which is released a rate that will cause the chlorine concentration in the tank to be 2 mg/L. The chlorine reacts with the water in such a way that it is depleted at a rate (in mg/L-h) given by rcl = ( -0.45 / h) CCl. When exposed to chlorine, the bacteria die off at a rate (in cells/L-s) given by:a) Calculate the required flow rate in L/s of the stock solution when the system is operating at steady state, including a schematic of the system.b) Determine the bacterial concentration (in CFU/L) thar should be expected in the effluent from the tank?
Please very fast Subject watewater engineering
Problem 8 Given L0,mix=12 mg/L, DO mix=DOsat=11.33 mg/L, kd=0.3 d-1, and kr =0.4 d-1, find the following: (a) Initial oxygen deficit (Do) (b) Critical time on the oxygen sag curve (tc) (c) Critical deficit (Dc)
Wasterwater Engineering Civil engineering
(0 Awastewater sample is being analyzed to determine its BOD content. The sample is diluted in order to perform the test: 295 ml. of distilled water are added to 5 ml of sample to fill the 300 ml BOD bottie. The bottle has an initial dissolved oxygen concentration of 7.9 mg/L After incubating 5 days, the dissolved oxygen concentration is 45 mg/L a. What is the S-day BOD of the wastewater? h. The deoxygenation rate constant, k. is 0.013 day What is the ultin BOD of the wastewater? ) A community normally levies a sewer charge of 20 cents/m' (S0.20/m).
design an aeration tank of CASP based on the following data influent flowrate is 100000m3/d, influent CODcr is 200mg/l influent TKN is 40mg/l effluent is CODcr Is 20mg/l. required by Local regulation. Please answer very soon will give rating surely
A trickling filter plant treats 2000 cum per day of sewage with a BOD5 of 220 mg/1 and a suspended solid concentration of 250 mg/1. Estimate the total solid production per day assuming the primary clarifier removes 25% of BOD and 60% of influent solids. Take the solid production in the trickling filter as 0.5 kg/kg of the applied BOD.
A groundwater supply has been designated as vulnerable to fecal contamination, and the state has specified a disinfection level of 99.99% (4.0-log) virus inactivation. The peak hourly pumping rate is 2000 gpm from the well field through a 4200-ft pipe with a 16-in diameter to a reservoir in the town. The water temperature is 10°C. A. what is the contact time in the pipeline? B. What chlorine residual is required in the water at the outlet of the pipeline? F3 F4 F5 F6 F7 F8 F9 F10 F11 F12 %23 & 3 4 7 8 T Y D F G K CO LLI
Please 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?
Sketch a typical treatment process scheme for the treatment of raw water containing a turbidity of 19 NTU, Mn concentration of 0.07 mg/L, Fe concentration of 0.3 mg/L, TOC of 2 mg/L, coliform (#/mL) 800 and color of 18 CU.