A mechanically cleaned bar screen is used in preliminary treatment for the following conditions: Wastewater flow rate = 100,000 m/d Approach velocity 0.6 m/s Open area for flow through the screen 1.6 m2 Head loss coefficient for clean screen = Head loss coefficient for clogged screen = Incline from vertical = 0° %3D 0.75 0.60 I %3D a. Calculate the clean water head loss through the bar screen. b. Calculate the head loss after 40% of the flow area is clogged with solids.

Water Gs=1 1. In a test to determine the discharge coefficient of a 70 by 35 mm Venturi meter, the total weight of water passing through the meter in 5 minutes was 3.5 kN. A mercury differential gage connected to the inlet and throat of the meter showed an average mercury difference during that time of 300 mm.. Determine the actual discharge if the same meter is used later on and a 250 mm difference is then observed. Mercury, Hg Gs = assume, 4 significant figures 2. The diameter of a 3 meter pipe decreases from 450 mm to 150 mm. If the velocity is to decrease uniformly in a linear manner, draw the diameter profile at each 500 mm length interval along the pipe. Discharge is 150 liters per second. Reservoir B 3. A pump draws water at 300 liters per second from reservoir A and lifts it to reservoir B as shown. The head loss from A to 1 is 20 times the velocity head in the 200 mm diameter and the head loss from 2 to B is 20 times the velocity head in the 150-mm diameter pipe. Assume your…

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),

Can you please help me solve this homework problem step by step and can you please write clear.

What do you understand by the term evaporation? If you’re a civil engineering technologist where do you apply this evaporation in your civil engineering related projects explain it? A class-A pan was setup adjacent to a lake. The depth of water in the pan at beginning was 77cm. in that week, a rainfall of 37mm came and 15 mm of water was removed from pan to keep the water level in the specified depth. If the depth of water at end of the week was 186.89 mm, calculate pan evaporation. Using suitable pan coefficient, estimate lake evaporation in that week.

A one cell rapid sand filter tank has a loading rate 9.0 m/h, surface dimensions of 15*6 m. The sand and gravel depths are 70 cm and 60 cm respectively. The height of wash trough is 50 cm and the height of water above surface of sand is 2.0 m. Note that Shape factor of sand is 0.80 and stratified bed porosity is 0.50. a) What flow rate (m³/sec) does the filter handle during production? b) What is the total height of filter basin (m)? c) Calculate the head loss if the value of this term [2 (Co fid)] equal to 105700. d) In your opinion this filter tank specified the Saudi specifications?