Why would one use a "low pass filter" when designing a water filltration system?
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A: (i)
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Why would one use a "low pass filter" when designing a water filltration system?
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- How would you describe the optimal features of a filter grain used in sewage effluent depth filtering?Describe briefly the nature and operation of rapid gravity filters used in drinking water treatment. Use sketches where appropriate.Please answer 4 and 5 Consider the design of granular media filters for a water treatment plant with a design flow of 40 MGD. For a filtration hydraulic loading of 5 gpm/ft2 determine the total filter area required for filtration (in square ft). Next, select the number of parallel filters needed, and their length and width (even foot increments), if each filter is square with area of 400 square feet. You choose a filter consisting of 36 inches of sand with an ES of 0.55 mm. The porosity is 0.4. Determine the superficial filtration velocity and the pore velocities in the sand layer. Calculate the detention time (in minutes) through the entire depth of the filter Calculate the clean bed head loss (in feet) for the filter using the Carmen-Kozeny equation. Assume a water temperature of 68 ºF and the design hydraulic loading rate. Use the media effective size for media diameter in the calculation. Estimate the filtration efficiency for a particle that is 4 microns in diameter.
- illustrate the working of biological activated sludge process plant with neat sketch & also differentiate the key aspects of Conventional trikling filter with Activated sludge process (1000 -1200 words)List down at least 5 kinds of filters which could be used for filtration methodConsider the design of granular media filters for a water treatment plant with a design flow of 40 MGD. For a filtration hydraulic loading of 5 gpm/ft2 determine the total filter area required for filtration (in square ft). Next, select the number of parallel filters needed, and their length and width (even foot increments), if each filter is square with area of 400 square feet. You choose a filter consisting of 36 inches of sand with an ES of 0.55 mm. The porosity is 0.4. Determine the superficial filtration velocity and the pore velocities in the sand layer. Calculate the detention time (in minutes) through the entire depth of the filter Calculate the clean bed head loss (in feet) for the filter using the Carmen-Kozeny equation. Assume a water temperature of 68 ºF and the design hydraulic loading rate. Use the media effective size for media diameter in the calculation. Estimate the filtration efficiency for a particle that is 4 microns in diameter.
- Design a rapid mono-media sand filter for a plant that has a design flow rate of 120 MGD. Filter Boxes Required:a) How many filter boxes are required for “on-line” filters?b) How many additional filter boxes are required to accommodate “off-line”filters?c) What is the total number of filter boxes needed by your plant?To help minimize any tendency for fine particles to migrate through the filter, and to drain as much water as possible, how does the holes or slots in the drain structure should be placed?List out the equipments use to remove gaseous pollutants using principal of absorption.