Width of the tank is normally kept about 6 m
Length of the tank is normally kept 4 to 5 times the width
Maximum horizontal flow velocity is limited to 0.3 m/minute
All the above
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The correct answer is D. All the above.
The width of a continuous flow type of sedimentation tank is normally kept about 6 m. This is because a wider tank will have a larger surface area, which will allow for more particles to settle out of the water. The length of the tank is normally kept 4 to 5 times the width. This is because a longer tank will have a longer detention time, which will allow for more particles to settle out of the water. The maximum horizontal flow velocity is limited to 0.3 m/minute. This is because a higher flow velocity will cause the particles to be carried out of the tank before they have a chance to settle out.
Here are some additional details about each of these factors:
- The width of the tank is normally kept about 6 m. This is because a wider tank will have a larger surface area, which will allow for more particles to settle out of the water. The surface area of a tank is important because it determines the amount of particles that can be removed from the water. A larger surface area means that more particles can be removed, which will result in a cleaner water.
- The length of the tank is normally kept 4 to 5 times the width. This is because a longer tank will have a longer detention time, which will allow for more particles to settle out of the water. The detention time of a tank is the amount of time that water spends in the tank. A longer detention time means that particles have more time to settle out of the water, which will result in a cleaner water.
- The maximum horizontal flow velocity is limited to 0.3 m/minute. This is because a higher flow velocity will cause the particles to be carried out of the tank before they have a chance to settle out. The flow velocity of a tank is important because it determines how quickly the water moves through the tank. A higher flow velocity means that the water will move through the tank more quickly, which will reduce the amount of time that particles have to settle out. This can result in a less clean water.