Design of Screening Unit in Sewage Treatment Plant | Screening Unit 

Design of aeration tank is already uploaded in the channel.. please go through the channel..and I will upload the design of equalization and tube settler soon..

Design of all treatment units are available on my channel.

Apki sceen bar design ka numericals atay hain mujhay samjha dain gi i have exam on Tuesday?

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Clear spacing is assumed...

Clear spacing depends on type of screen. As per CPHEEO manual For fine screen = 5 mm For medium screen = 12 mm For Course screen = 25 mm

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Usually accepted practice is to provide loss of head of 0.15 m but the maximum loss with clogged hand cleaned screen should not exceed 0.3 m.

Design guidelines are same but for ready to installed screening unit design criteria are generally as per the chosen manufacturer’s design standards.

Hand cleaned racks are set usually at an angle of 45 to 60 degrees to the horizontal to increase the effective cleaning surface and facilitate the raking operations. OR you can use formula of head loss(in terms of angle of inclination) to calculate angle of inclination.

Dear friend, We can design the screening unit depending upon the flow rate. Then, assuming the velocity of flow(0.6-1.2 m/s) through the screen and design flow rate, we can calculate the cross sectional area of screen( area through which sewage is flowing,it doesn't include diameter of bars). Then by assuming depth, calculate width( width through which water is flowing,it doesn't include diameter of bars) and then assume clear spacing and calculate the bars from the width of channel. Then, calculate total width of channel i.e. width + diameter of bar*number of bars. Also calculate length of screen by assuming angle of inclination (45-60). At last take check for head loss. In your questions, you have given bar space, width, and depth of channel. If all these value are given then why we are going for designing because these value depends on flow rate and velocity.. we can not assume all these value..we can assume only one dimension and rest of the dimensions we have to find. For this, refer this video or you can find the design guidelines in CPHEEO manual.

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Yes..it's meter not meter square 👍

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Yes..it was mentioned by mistake..unit of L/W/D is Meter