The following diagram illustrates the operation of a rapid sand filter.Washwaterstorage tankWater levelwhile filteringEBAFrom coagulatinlarifica on basiFiltratecontrollerBottom ofwashwatertroughWashwater ratecontrollerLateral drainSealFiltered waterstorage tankMain drain.WasitwaterdrainDuring filtration cycle, the valves A, B, C and E open/close as follows:O 1) A and B open and C and E close2) A and B close and C and E open3) A and C open and B and E close4) A and E open and B and C close5) A and C close and B and E openUWater levelwhile washingSandGravel000MANSKER

Answered: Image /qna-images/answer/5540ba87-0129-4b40-bfb5-67c96370cc18.jpg

During filtration cycle, the valves A, B, C and E open/close as follo 1) A and B open and C and E close 2) A and B close and C and E open 3) A and C open and B and E close 4) A and E open and B and C close 5) A and C close and B and E open

During filtration cycle, the valves A, B, C and E open/close as follo 1) A and B open and C and E close 2) A and B close and C and E open 3) A and C open and B and E close 4) A and E open and B and C close 5) A and C close and B and E open

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

1- - 1/ Question 1 (i) Sketch, label and explain all the different parts in activated sludge system used during secondary treatment of wastewater. Give one (1) important reason why secondary sedimentation tank is normally installed after an activated
The following diagram illustrates the operation of a rapid sand filter. Washwater storage tank Water level while filtering E A From coagulation larification basi 2 00 Water level while washing Filter rate controller E Lateral drain Filtered water storage tank Main drain Washwater drain The Valve D is to O 1) Control influent water from sedimentation tanks O2) Discharge dirty backwash water 3) Discard the initial filtered water after backwashing and resuming filtration 4) Control the clean backwash water 5) None of the above B3 Seal Sand Gravel 0 0 0 0 0 Caf Bottom of washwater trough Washwater rate controller
A city is to install rapid sand filters downstream of the clarifiers. The design loading rate is selected to be 180 m³/m².d. The design capacity of the waterworks is 0.40 m³/s. The maximum surface per filter is limited to 60 m². Calculate the followings; i ii. iii. Total surface area required The number of filters, n The surface area for each filter, a IV. Normal filtration rate, v i. Determine the total surface areal required A = (Q/A) ii. Determine the number of filters, n iii. Determine the surface area for each filter is a x 8 Use dimensions as 8 iv. Determine the normal filtration rate. v = Q/A = (0.40 m³/s) / ( X m³/m².d. ) X Area m² n use m² = = a =
Q3) A treatment plant treats 18000 m³/d wastewater. of SS concentration 300mg/l and BOD, 200 mg/l. The treatment plant consists of one primary circular sedimentation tank and two single stage trickling filters. The effluent SS concentration from primary sedimentation tank -120mg/l. Each trickling filter of depth 2m, r-120% and BOD removal - 80 %. Find: 1.Diameter of each trickling filters (m). 2.Total BOD removal in treatment plant (%).
A sand bed filter is 50 ft in diameter and filled to a depth of 20 ft with sand. The sand particle diameter is 1 mm and the initial bed void fraction is .34. Wastewater containing 1% by volume suspended solids is fed to the filter at a rate of 4500 gpm by a positive displacement pump which can delvier this rate up to a discharge pressure of 45 psig. Determine how long in hours the filtration system can operate before shutting down for backwashing.
Name:.. 11. An activated sludge system has a single aeration basin with a volume of 300,000 gal and 2 - 25 ft. diameter secondary clarifiers. The influent flow is 1.1 MGD, and the influent BODs and TSS are 170 mg/L and 190 mg/L, respectively. The mixed liquor suspended solids concentration is 2500 mg/L, and the recycle suspended solids concentration is 6800 mg/L. The sludge recycle flow rate is 0.60 MGD and the solids residence time is 9 days. 10a. Calculate the volumetric BODs loading rate on the aeration basin in units of lbs/1000 ft³-d. ( 10b. Calculate the F:M ratio in units of g-BODs/g-TSS-d 9
N 5)( rat ala SIL O 23-A) An activated sludge system is to be used for treatment of 10000 m/day of municipal wastewater. A rimary clarification, the value of BOD, is 150 mg/l, and it is desired to have not more than 5 mg/l. in. ffluent. Assume that Y- 0.5; K, 0.05/day; and ML.VSS-3000 mg/l; Return sludge concentration 10 ng/L. 0 10 days. Determine: Treatment efficiency and the volumetric organic loading. 3) Microorganism ratio 5) The quantity of sludge that must be wasted each day i 2) Reactor volume and detention time. 4) the recycle ratin
If (Qr/Q=120 percent of discharge), effluent BOD concentration=80ppm, volume of filter =825m3 , discharge =50L/sec , The influent BOD concentration equal: Choose one: a. 277.89 b. 277.2 c. 276 d. 275
The concentration of suspended solids in the flow is 2500 g/m3. Knowing that (SS) come into the clarifier each day is (31275 Lbs/day). Determine The flow to a clarifier in MGD ? Select one: O a. 1.5 O b. 1.2 O c. None O d. 1.3
An oil company has drilled a hydraulic fracturing well near your microbrewery in Anytown, U.S.A. It stores the wastewater in a holding pond on site until proper disposal techniques can be implemented. On October 10 at 1200 hours, the company notified the town that they have detected a leak in the holding pond and the brine water may have entered the water table aquifer. Meanwhile, the Anytown Beer Brewery is happily making "Anytime Bitter IPA", known by its slogan "Anytime you feel bitter, have an Anytime Bitter IPA". The source of water for their product is a production well that taps the water table aquifer at a rate of 65 gpm. The monthly water quality testing is due to occur on October 16 at 1600 hours. Using the information provided, determine if the brine will show up during the inspection, what additional contaminants may exist, and possible soil remediation techniques to solve the problem. 1) Figure 1 shows a contour map of the water table around the well at the brewery.…
b) Determine the concentration of the effluent BOD, for the two-stage trickling filter described below The wastewater temperature is 17 C. Assume the NRC equations apply. Design flow = 0.0s09 m/s Influent BODS (after primary treatment) = 260 mg/L Diameter of each filter = 24.0 m Depth of each filter =1.83 m Recirculation flow rate for each filter = 0.0594 m/s %3D
Two circular clarifiers operated in parallel service a single stage bio-tower system (plastic media) that receives municipal wastewater at an average flow (Qaverage) of 2000 m³/d, with BOD5 = 200 mg/L. The internal flow recirculation ratio is 2.4. The maximum overflow rate for the clarifiers is 1.8 m³/m²-hr. The design procedures require that the sizing of the clarifiers be based on "PEAK" flow which is twice the average flow (Qpeak = 2 × Qaverage), and media depth in the biotower is 3.0 m. Determine: (a) The overall BOD5 removal. (b) the surface area and the diameter of each clarifier. (k = 0.06 min¹; n = 0.5),