rapid sand filter design calculations

Rapid Sand Filtration

Standard design practice of Rapid Sand filter: Maximum length of lateral = not less than 60 times its diameter. Spacing of holes = 6 mm holes at 7.5 cm c/c or 13 at 15 c/c. C.S area of lateral = not less than 2 times area of perforations.

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FILTER DESIGN EXAMPLE

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

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Rapid Sand Filter

A design for a low cost filter using a plastic tank and pvc tubing Shop Print Workbench Community Log in Library Challenges ... Rapid Sand Filter Rapid Sand Filter / Loading ... Renderings Folder January 20th, 2015 Water Treatment Plant.dwg dwg Comments ...

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Optimum expansion of sand filters during backwash

Fig. 6. Iron removed from sand by physical abrasion test 117 Fig. 7. Head loss curves for run 3B, top 6 in. of filter media 132 Fig. 8. Variation of the ratio of effluent to influent iron with time 133 Fig. 9. Cumulative differential effluent iron vs. time, run 7 135

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Optimum expansion of sand filters during backwash

Fig. 6. Iron removed from sand by physical abrasion test 117 Fig. 7. Head loss curves for run 3B, top 6 in. of filter media 132 Fig. 8. Variation of the ratio of effluent to influent iron with time 133 Fig. 9. Cumulative differential effluent iron vs. time, run 7 135

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CHAPTER 5 WATER TREATMENT PLANT

78 During the long period of the filter use/run some of the raw water impurities and some products of biochemical degradation will have been carried into the sand-bed to a depth of some 0.3 to 0.5 m according to the grain size of the sand. To prevent cumulative

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FAQ (Frequently Asked Question): How do you calculate …

A practitioner''s knowledge base. A biosand filter (BSF) is an adaptation of the traditional slow sand filter, which has been used for community drinking water treatment for 200 years. FAQ (Frequently Asked Questions) How do you calculate the appropriate flow

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doee

Appendix I. Sand Filter Design Example # Assume inflow pipe diameter = 1 ft # Assume over the crown pipe cover = 2 ft # Final surface elevation above sand filter = 101 ft = 98 ft + 2 ft + 1 ft # Depth of filter layer: df-max = 3 feet df-min = 1.8 feet 2. Peak Discharge

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MODULE 3

The important design parameters of a slow sand filter are the depth of the filter bed, filter media size, the filtration rate, and the depth of the supernatant water level. As far as possible, these design parameters should be based on experience obtained from existing treatment plants that use a raw water source of similar quality.

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Selection of optimum filtration rates for sand filters

The early rapid sand filter systems were proprietary devices, the first one patented by I. W. Hyatt in 1884. A number of others were on the market in the mid 1890''s when 0. W. Fuller was retained by the Louisville Water Company to test the suitability of Kentucky.

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filter sand

FILTER DESIGN EXAMPLE

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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

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wt Chapter 6

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

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Design Examples

Rapid Sand Filter Design Problem: Design a rapid sand filter to treat 10 million litres of raw water per day allowing 0.5% of filtered water for backwashing. Half hour per day is used for bakwashing. Assume necessary data. Solution: Total filtered water = 10.05 x 24 x 10 6 = 0.42766 Ml / h

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Rapid sand filter design example.pdf | Filtration | Litre

Rapid Sand Filter Design Problem: Design a rapid sand filter to treat 10 million litres of raw water per day allowing 0.5% of filtered water for backwashing. Half hour per day is used for bakwashing. Assume necessary data. Solution: Total filtered water = 10.05 x 24 x ...

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PART 6

6-28 c. Dosing siphon height above sand beds: _____ feet If rapid sand gravity filters are to be installed, the area provided shall be: (based on 3.33 gpm/sq. ft. at …

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(PDF) Design and Construction of a Modified Rapid …

The basic elements of a slow sand filter are described, as are planning, design, and construction aspects, with special emphasis on maintenance. Some cost figures for systems in India and Colombia ...

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Multimedia (sand) Filtration Calculation

Multimedia (Sand) Filtration Calculator *recommended range of Filter Bed Speed is between 10m/h and 30m/h. Calculate A : Surface Area [m 2] : D : Diameter of Filter [m] : I''m interested

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WATER TREATMENT PLANT DESIGN2

Page 1 of 2 2. Design Criteria Description Unit Design Criteria Design Flow Max. Flow (5000 m3/day) (7500 m3/day) 1. Rapid Mixing - Time sec 1 to 3 2.17 1.45 - G - Value sec-1 500 to 700 612 1100 - GT 1328 1595 2. Flocculation Basin - Type Baffle Channel

filter sand

In this lesson, we will design a rapid sand filter and a clear well chamber. Once again, these calculations are similar to those used for flash mix, flocculation, and sedimentation basins. For the rapid sand filter, the most important dimension is the surface area.

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DESIGN OF RAPID SAND FILTER | CEPT

Dhvanee Janak Bhavsar 5076 DESIGN OF RAPID SAND FILTER Filtration is a vital process in the treatment of water in treatment plants. Removal of inorganic, as well as organic matter is aided by this method. A minimum of 2 units is mandatory in a treatment

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Design Criteria for Rapid Sand Filters

Design Criteria for Rapid Sand Filters Panel Discussion John R. Baylis Search for more papers by this author Herbert E. Hudson Jr. Search for more papers by this author Richard R. Kennedy Search for more papers by this author William W. Aultman Search for ...

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PART 6

6-28 c. Dosing siphon height above sand beds: _____ feet If rapid sand gravity filters are to be installed, the area provided shall be: (based on 3.33 gpm/sq. ft. at …

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Rapid Sand Filtration | SSWM

Operation of a rapid sand filter consists of flow control, regular backwashing and cleaning. The period between backwashes depends on the quality of the influent water and normally lies between 24 – 72 hours (UNEP 1998).The cleaning process requires an interruption of the purification process of 5 - 10 minutes per filter bed.

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Optimum expansion of sand filters during backwash

Fig. 6. Iron removed from sand by physical abrasion test 117 Fig. 7. Head loss curves for run 3B, top 6 in. of filter media 132 Fig. 8. Variation of the ratio of effluent to influent iron with time 133 Fig. 9. Cumulative differential effluent iron vs. time, run 7 135

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Selection of optimum filtration rates for sand filters

The early rapid sand filter systems were proprietary devices, the first one patented by I. W. Hyatt in 1884. A number of others were on the market in the mid 1890''s when 0. W. Fuller was retained by the Louisville Water Company to test the suitability of Kentucky.

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Chapter 26 Gradation Design of Sand and Gravel Filters

26–6 (210-vi–NEH, October 1994) Chapter 26 Gradation Design of Sand and Gravel Filters Part 633 National Engineering Handbook Table 26–13 Data for designed filter band 26–29 Table 26–14 Design filter band data for example 26–6 soil 26–34 Table 26B–1 …

filter sand

Pressure sand filter is the first unit process in any treatment. It is used to remove suspended solids from raw water. Recommended velocity for filtration is 10 m/hr to 30 m/hr. Calculation for pressure filter design. Pressure sand filter is the first unit process in any

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Selection of optimum filtration rates for sand filters

The early rapid sand filter systems were proprietary devices, the first one patented by I. W. Hyatt in 1884. A number of others were on the market in the mid 1890''s when 0. W. Fuller was retained by the Louisville Water Company to test the suitability of Kentucky.

Get price

FAQ (Frequently Asked Question): How do you calculate …

A practitioner''s knowledge base. A biosand filter (BSF) is an adaptation of the traditional slow sand filter, which has been used for community drinking water treatment for 200 years. FAQ (Frequently Asked Questions) How do you calculate the appropriate flow

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Pressure Sand Filter Calculator | WE

Pressure sand filter is the first unit process in any treatment. It is used to remove suspended solids from raw water. Recommended velocity for filtration is 10 m/hr to 30 m/hr. Calculation for pressure filter design. Pressure sand filter is the first unit process in any

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WATER TREATMENT PLANT OPERATION (RAPID SAND FILTER)

c/ 2 5 0 80 WA WATER MANAGEMENT PROJECT WATER TREATMENT PLANT OPERATION (RAPID SAND FILTER) ATRAININGXJOB MANUAL ; •;:''*. BY VERE WILLIAMS ./»B0KA'':''wH¥ ASSISTAM". A JOINT-VENTURE PROJECT OF THE GOVERNMENTS

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WATER TREATMENT PLANT DESIGN2

Page 1 of 2 2. Design Criteria Description Unit Design Criteria Design Flow Max. Flow (5000 m3/day) (7500 m3/day) 1. Rapid Mixing - Time sec 1 to 3 2.17 1.45 - G - Value sec-1 500 to 700 612 1100 - GT 1328 1595 2. Flocculation Basin - Type Baffle Channel

filter sand

VOL. 26, NO. 4] RAPID-SAND FILTERS 447 In plants of over 100 m.g.d. capacity the desirable size of unit is determined by the economics of the wash-water system, rather than by any question of flexibility or number of operators. It is probable that no filter unit

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Design Criteria for Rapid Sand Filters

Design Criteria for Rapid Sand Filters Panel Discussion John R. Baylis Search for more papers by this author Herbert E. Hudson Jr. Search for more papers by this author Richard R. Kennedy Search for more papers by this author William W. Aultman Search for ...

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CIVL 1101 Introduction to Filtration 1/15

Rapid Sand Filtration Filtration Type Application Rate m/hr gal/ft2-day Slow Sand 0.04 to 0.4 340 to 3400 Rapid Sand 0.4 to 3.1 3400 to 26,000 In rapid sand filtration much higher application velocities are used Filtration occurs through the depth of the

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Lecture 5: Filtration

Calculations of filter backwash rate The backwash flow rate is calculated using the following equations: 90 0.5 90 33.7 1135.69 0.0408 d G d v b n d3 2 90 s g G n Where, bk ht 3/ 2 d b v b design 1.3v v b 3 m

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Design Examples

Rapid Sand Filter Design Problem: Design a rapid sand filter to treat 10 million litres of raw water per day allowing 0.5% of filtered water for backwashing. Half hour per day is used for bakwashing. Assume necessary data. Solution: Total filtered water = 10.05 x 24 x 10 6 = 0.42766 Ml / h

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Chapter 26 Gradation Design of Sand and Gravel Filters

26–6 (210-vi–NEH, October 1994) Chapter 26 Gradation Design of Sand and Gravel Filters Part 633 National Engineering Handbook Table 26–13 Data for designed filter band 26–29 Table 26–14 Design filter band data for example 26–6 soil 26–34 Table 26B–1 …

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PART 6

6-28 c. Dosing siphon height above sand beds: _____ feet If rapid sand gravity filters are to be installed, the area provided shall be: (based on 3.33 gpm/sq. ft. at the peak flow rate) Peak flow rate* gal./min.

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(PDF) Step-by-step design and calculations for water …

To design a rapid sand filtration tank: Q avg. = 0.694 m 3 /s = 2,498.4 m 3 /h Using the flow of the filter: Q filter =7 m 3 /h/m 2, [9,21] Area of the filter bed ...

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