Question
The length of sedimentation tank should be atleast _______ the breadth of the tank.
The correct answer is
Four times
A widely accepted guideline suggests that the length of a rectangular sedimentation tank should be at least four times its breadth. Designing with a sufficient length-to-breadth ratio, such as four times, is a standard practice to enhance performance and achieve the required water quality leaving the tank.
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Important Questions from Water Treatment
- Choose the correct statements about coagulation process.
A. Coagulation makes smaller colloids to adhere to each other to form large floc particles
B. Colloids are continually involved in Brownian moment.
C. Colloids are stable because of their surface charge.
D. Coagulants are preferably trivalent cations.
E. Coagulants are soluble in neutral pH.
Choose the most appropriate answer from the options given below: - Hardness of water is due to the presence of
- Which of the following is used as a coagulant for removal of phosphates in water ?
- Given the following parameters of a primary settling chamber :
Diameter = 50m, Depth = 2.5m, average detention time = 2 hours.
How much quantity of waste water is being treated ? - Calculate hardness in units of mg/l as CaCO$_3$ of a ground water sample having Ca$^{++}$ ion concentration of 100 mg/l.
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