﻿ sand filter sizing and design calculation

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• ### Multimedia (sand) Filtration Calculation Lenntech

The above multi-media filtration calculator calculates the diameter of a round multi-media filter (MMF) based on the filter bed speed as input. For industrial water filtration purposes vertical filter bed speeds (ideal service flows) varying between 10 m/h and 25 m/h are used depending on the quality of the to be treated water. The higher the total suspended solids (TSS indicated in mg/l

• ### How to Select the Correct Filter Size for Your

25/8/2006· All filters have gallon per minute design rating and turnover rate. For example: A 24 feet (7.3 m) round above ground pool has approx 13,500 gallons (51,103.1 L). A Hayward S166T Sand Filter has a 10hr turnover rate of 18,000 gallons (68,137.4 L) and would work well with this pool.

• ### Pressure Sand Filter Calculator WE Water Engineer

Calculation for pressure filter design. Pressure sand filter is the first unit process in any treatment. It is used to remove suspended solids from raw water. Filter is designed based on velocity consideration. Recommended velocity for filtration is 10 m/hr to 30 m/hr. If we select velocity less than 10 m/hr, channeling will happen and velocity higher than 30 m/hr will lead to high

• ### Sand Filter Design Example doee

Appendix I. Sand Filter Design Example I.1 Sand Filter Design Example Data Required: Peak Discharge Calculation for Bypass Flow The District of Columbia uses the 15-year storm (with t c = 5 minutes) for post-development runoff. Using the Rational Method: Q CIAp15 = Where: Qp15 = bypass peak flow (cfs) C = runoff coefficient = 1.0 I = rainfall intensity = 7.56 in/hr A = drainage area = 0.23

• ### Sand Filter Design Example Stormwatercenter.net

This example describes in detail the design of a sand filter to treat stormwater runoff from the Brown Civic Center (Figure 1). The filter must meet the following design criteria: Provide Recharge; Treat the Water Quality Volume; Site Specific Data: Existing ground elevation at BMP location is 22.0 feet, mean sea level. Soil boring observations reveal that the seasonally high water table is at

• ### FILTER DESIGN EXAMPLE suatiksu.org

USA Rapid Sand Filter Design Inputs Design a rapid sand filter to treat Q= 20000 m3/d Allowing filtered water for backwashing: Q_BW= 2% Time used for bakwashing per day = t_BW= 0.50 hours Assume the rate of filtration = 10 m/h Number of Filters 2.00 Length/ Width of Filters= 1.30 Depth of Sand Media= 1.00 m . Solution: Total filtered water = 20 000 x 1 .02 x 24 / (24 * (24 -.5 ))A 868 m3/h

• ### wt Chapter 6 WordPress

A city is to install rapid sand filters downstream of the clarifiers. The design loading rate is selected to be 160 m3/(m2 d). The design capacity of the water works is 0.35 m3/s. The maximum surface per filter is limited to 50 m2. Design the number and size of filters and calculate the

• ### Chapter 26 Gradation Design of Sand and Gravel Filters

Chapter 26 Gradation Design of Sand and Gravel Filters Part 633 National Engineering Handbook 633.2600 Purpose Chapter 26 presents criteria for determining the grain-size distribution (gradation) of sand and gravel filters needed to prevent internal erosion or piping of soil in embankments or foundations of hydraulic structures.

• ### Sand Filter Design Example doee

Appendix I. Sand Filter Design Example I.1 Sand Filter Design Example Data Required: Peak Discharge Calculation for Bypass Flow The District of Columbia uses the 15-year storm (with t c = 5 minutes) for post-development runoff. Using the Rational Method: Q CIAp15 = Where: Qp15 = bypass peak flow (cfs) C = runoff coefficient = 1.0 I = rainfall intensity = 7.56 in/hr A = drainage area = 0.23

• ### Filter Sizing for Swimming Pools| Pool & Spa News

1/1/2002· The example we’ve been using refers to characteristics of a sand filter. It’s important to note that both DE and cartridge filters have notably lower filter rates. (Typically, high-rate sand models filter water at a rate of 20 gpm per square foot, DE models work at 2 gpm/sq. ft. and cartridge units at 1 gpm/sq. ft.) Nevertheless, the

• ### FILTER DESIGN EXAMPLE suatiksu.org

USA Rapid Sand Filter Design Inputs Design a rapid sand filter to treat Q= 20000 m3/d Allowing filtered water for backwashing: Q_BW= 2% Time used for bakwashing per day = t_BW= 0.50 hours Assume the rate of filtration = 10 m/h Number of Filters 2.00 Length/ Width of Filters= 1.30 Depth of Sand Media= 1.00 m . Solution: Total filtered water = 20 000 x 1 .02 x 24 / (24 * (24 -.5 ))A 868 m3/h

• ### Sand Filters Lenntech

Sand Filtration by means of a sandfilter. Depending on the type of water, suspended solids concentration, oil and grease, COD/ BOD, iron contents, sand filters are sized differently, but the basic design data to clarify natural waters are the following:

• ### Spreadsheet Slow sand filter design Brookepedia

This spreadsheet allows the design of slow sand filters. This water treatment technology does not require expensive equipment or chemicals (coagulants, polymers, limestone, etc...) and can be used in small communities and villages. All calculations and rates are following the Brazilian Standard NBR 12216/92. The spreadsheet is in Portuguese and

• ### Manual of Design for Slow Sand Filtration

1.4 Hydraulic Conductivities for Slow Sand Filters 19 1.5 Summary of Designs of Slow Sand Filters in Europe as Reported by Hazen, With Units Adjusted to Fit Those Used in This Manual 21 1.6 Design Criteria for Slow Sand Filters for Rural Water Supplies 26 2.1 Present and Projected Flow Data for Village of 100 Mile House, BC 35

• ### Lecture 5: Filtration

A dual media filter is composed of 0.30 m anthracite (mean particle size 0.20mm) that is placed over a 0.60 m layer of sand (mean particle size 0.70mm) with a filtration rate of 9.78 m/h.

• ### Sand Filter an overview ScienceDirect Topics

In graded sand filters the bed depth typically comprises 0.7 m of 0.6–1.18 mm fine sand (effective size 0.75 mm), 0.1 m of 1.18–2.8 mm coarse sand, 0.1 m of 2.36–4.75 mm fine gravel and 0.15 m of 6.7–13.2 mm coarse gravel. For applications requiring a finer sand the two upper layers are changed to 0.7 m of 0.5–1.0 mm sand (effective size 0.55 mm) and 0.1 m of 1.0–2.0 mm coarse sand

• ### Chapter 26 Gradation Design of Sand and Gravel Filters

Chapter 26 Gradation Design of Sand and Gravel Filters Part 633 National Engineering Handbook 633.2600 Purpose Chapter 26 presents criteria for determining the grain-size distribution (gradation) of sand and gravel filters needed to prevent internal erosion or piping of soil in embankments or foundations of hydraulic structures.

• ### Filter Press Sizing Calculations Automatic Filter Press

Filter Press Sizing Calculations The attached graphs and data sheets are for your use in estimating filter press sizing and chemical dosing requirements. All calculations used in preparing this material are based on the following: Cake dry solids: 30% by weight Cake density: 75#/ft³ Ferric chloride dose: 5% by weight Ferric []