design calculation of slow sand filter

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Design of Water Filter for Third World Countries

Design of Water Filter for Third World Countries Louis Chan Marcus Chan Jingwen Wang ... Slow sand filter research 4.3 Slow Sand Filters ... Calculation of final design …

Sandfilter - 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:

Slow sand filter - Wikipedia

The water produced from an exemplary slow sand filter is of excellent quality with 90-99% bacterial cell count reduction. ... Slow sand filters, due to their simple design, may be created DIY. DIY-slow sand filters have been used in Afghanistan and other countries to aid the poor.


BASIC POOL CALCULATIONS . Step 1: Calculate Quantity of Water. Use the following formulas: Shape. Formula. ... Two (2) 3.1 square foot high rate sand filters . or. one 6.9 square foot high rate sand filter . OR. One 300 square foot cartridge filter . Step 4: Choosing the Right Filter .

17 Rapid filtration Luiz di Bernardo -

Rapid filtration 17.1 Introduction As explained in the previous chapter, filtration is the process whereby water is purified by passing it through a porous material (or medium). In rapid filtration sand is commonly used as the filter medium1 but the process is quite different from slow sand filtration.

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

pressure sand filter design calculations prices - YouTube

Aug 25, 2016· pressure sand filter design calculations prices ... differs from the Slow Sand Filter water treatment Water Filters or pressure design the sand filter for removal Tonka Water, Pressure Filters ...

Rapid vs slow filtration - Biosand filter

A flow of between 4 – 21 m/h can be expected from a rapid sand filter, which is somewhere between 20 and 50 times faster than the range of slow sand filtration. Flow rates are usually around 0.1 m/h but can increase up to 0.4 m/h.

Lecture 5: Filtration - الصفحات الشخصية

Most famous filters inwater treatment are Rapid Sand Filters. 8. 5. ... Calculations of filter backwash rate ... 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 = backwash ra e m3 m2., d 90 =sieve size that passes 90% by weight


Generally no need for further hydraulic calculations Maximum velocity in the manifolds and in laterals = .3 m/s Spacing between laterals = 1.5 m ... 2 Design Summary of a Slow Sand Filter Design parameters Recommended range of values. Have you read all our Tech Briefs?

Granular Media Filtration for Water Treatment Applications

1 Granular Media Filtration for Water Treatment Applications Terry Engelhardt Sales Development Manager – Drinking Water Hach Company The intent of this paper is to provide cursory information about filter design …

Chapter 8 Sand Filters - Brisbane

Draft Water Sensitive Urban Design Engineering Guidelines Sand Filters August 2005 8-1 Chapter 8 Sand Filters Sand Filters for Detention and Filtration of Stormwater Runoff

Filtration - KFUPM

¾Slow sand filtration −Single-medium −San size 0.2 to 0.4 mm −Filtration rates of 0.05 to 0.15 gal/min-ft2 −Cleaned manually (every 4 to 6 weeks) −Needs large area and manual labors −Has been replaced by rapid sand filter 34 Filtration in Water Treatment ¾Rapid Sand Filter −Preceded by coagulation, flocculation, and sedimentation

Slow Sand Filtration for Water Treatment -

• For slow sand filtration systems, site-specific pilot testing is necessary, unless a slow sand filter is already treating the same source water at another location, because understanding of these systems is insufficient to allow engineers to predict what filtered water turbidity an operating slow sand filter will attain. Piloting of these ...


DESIGN OF RAPID GRAVITY FILTER USING C PROGRAMMING AND AUTOCAD ... unnecessary calculation and hence saves time . (iv) LIST OF FIGURES: page no. (i). Details of filter unit 2 ... layer in a filter DESIGN STEPS FOR ESTIMATION OF SAND DEPTH :

Original:Slow sand filtration water treatment plants ...

Original:Slow sand filtration water treatment plants. From Appropedia. Jump to: navigation, search. ... DESIGN. Before embarking on a treated water supply project, it is essential to evaluate and define the level of organisation in the community. ... The slow sand filter proposed below differs from the conventional variable head slow filter in ...


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

An Introduction To Slow Sand Filtration - Solutions for Water

Types Of Sand Filter 5 1.4.The Basic Design Of Slow Sand Filters Figure 1.1. show the basic design principles used in a slow sand filter. Figure 1.1: The basic design of a slow sand filter.

SLOW SAND FILTRATION - University of Guelph

Slow sand filtration involves allowing irrigation water to slowly pass through a bed of sand or other porous material such as pumice, rockwool, etc for treatment. It uses both physical and ... Slow sand filters can be an effective means of controlling a wide variety of pathogen species.

Slow Sand Filtration | The Safe Water System | CDC

A slow sand filter is a sand filter adapted for use. Please note that although commonly referred to as the BioSand Filter, the BioSand Filter terminology is trademarked to one particular design, and this page encompasses all slow sand filters.

design calculations in small sand filter design - BINQ Mining

Dec 31, 2012· Stormwater Sand Filter Sizing and Design – Urban Drainage and …. Stormwater Sand Filter Sizing and Design …sand, or other fine media filter, has small pore spaces with slow flow … If the two calculations give significantly … »More detailed

Slow Sand Filtration | SSWM - Find tools for sustainable ...

Slow sand filtration is a type of centralised or semi-centralised water purification system. A well-designed and properly maintained slow sand filter effectively removes turbidity and pathogenic organisms through various biological, physical and chemical processes in a single treatment step.Only under the prevalence of a significantly high degree of turbidity or algae-contamination, pre ...

MIWR – GONU MWRI - GOSS Technical Guidelines for the ...

MIWR – GONU MWRI - GOSS Technical Guidelines for the Construction and Management of Slow Sand Filters A Manual for Field Staff and Practitioners

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 …

Stormwater Sand Filter Sizing and Design -

use of slow sand filters which require only an occasional cleaning. The challenge a designer of a stormwater filter faces is to find a design that will provide a sufficient flow-through rate to process most of the runoff events (Urbonas et al ., 1996a).

Selection of optimum filtration rates for sand filters

filter runs, which resulted from the rapid formation of a surface sediment layer, and deep penetration of the sediment into the sand. Since the slow aand filter was cleaned manually by periodic removal of the dirty surface sand layer, deep penetration and short filter runs could not be permitted.

Pressure Sand Filters - Bikon Water

Pressure Sand Filters : Technology ... referred to as backwashing Slow sand filters are cleaned less frequently by removal of the top layer of media. Filter Bed. ... Filter media selection (both size and type) may be the most important decision in a rapid sand filter design. Its selection is specific to each treatment plant and depends on the ...

wt Chapter 6 - School of Civil & Environmental Engineering ...

Design the number and size of filters and calculate the normal filtration rate. ... Slow sand filters slowly lose their performance as the ... SSF DESIGN Design a slow sand filter to treat a flow of 800 m3/day. ...