Sewage Treatment Plant Slow Sand Filter

Product Details
Customization: Available
Type: Quartz Sand
Usage: Environmental Protection, Chemical Industry, Water Treatment
Manufacturer/Factory & Trading Company

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  • Sewage Treatment Plant Slow Sand Filter
  • Sewage Treatment Plant Slow Sand Filter
  • Sewage Treatment Plant Slow Sand Filter
  • Sewage Treatment Plant Slow Sand Filter
  • Sewage Treatment Plant Slow Sand Filter
  • Sewage Treatment Plant Slow Sand Filter
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Basic Info.

Model NO.
YLD-MF-1600
Motive Force
Pressure
Style
Vertical
Performance
Efficient Filtration
Certification
CE, BV
Quality Authentication
ISO9001:2008
Working Temperature
5-40centigrade
Material for Filtration Tank
Stainless Steel/ Carbon Steel
Material for Face Piping
Stainless Steel or PVC
Input Power
2~20kw
Power Supply
AC380V 35A 50Hz
Inlet and Outlet
2.5 Inch(Dn65mm)
Flow Tate
20 T/H
Tank Diameter
1600mm
Working Pressure
1.0MPa
Transport Package
Plywood Case Into Container
Specification
CE, ISO
Trademark
YLD
Origin
Jiangyin, Jiangsu, China
HS Code
8421219990
Production Capacity
5000 Sets/Year

Product Description

Sewage Treatment Plant Slow Sand Filter

A slow sand filter consists basically of the following components:
  Housing
  Water layer
  Filter bed
  Drainage system
  Flow control
 
Housing
 
Filters can be constructed in tanks with non-reactive surfaces such as plastic or fiberglass lined galvanized tanks, poly or concrete tanks of various sizes from 44gal drums (205 litres) up to 100,000 litre tanks. It may be advantageous to construct 2 smaller SSF units rather than one large unit so one can be shut down periodically for cleaning or repairs. Table 1 presents the volume of water filtered in a 24 hour period by filters of varying size. The capacity of the filter is determined by the surface area of the filter top and not the overall volume of the filter. Consideration must be made of the flow rate to be used when determining tank size (see Managing the SSF below).
 
Water layer
 
The water layer above the filter bed provides the head to push water through the filter bed. It is convenient as a water storage zone and provides an effective temperature buffer to stabilize the filter and protect the biological activity occurring in the top layers of filter bed. A minimum depth of .5 m up to 1.5 m is most commonly used. Research in Australia suggests that this water layer should be maintained at a constant depth by the use of a small pump from an overflow tank or from the filtered water reservoir. This is particularly important if nutrient solution or recycled water is introduced into the filter in pulses and not continuously. The filter should never stand with an exposed dry top layer, or stagnant water which would accumulate only if the filter outlet was closed at the bottom. Continuous filtering assists in the development and maintenance of a healthy filter.
 
Filter bed
 
The filter bed consists of a uniform fine particle sand mixture as specified (see Sand Specifications). The most critical design feature of the SSF is using a correct sand or alternative media. The filter bed is built to a depth of 1-1.5 m (or more) with a minimum of .8m on smaller filters. This depth of sand will allow for losses which will occur if the top portion of the sand is removed when particulate matter and algae is cleaned from the top of the sand.
 Sewage Treatment Plant Slow Sand Filter
Sand Specifications
 
Sand is characterized by the diameter of the individual sand grains (eg 0.15-.35 mm) and the effective size of the composite sand, the ES or d10. d10 is defined as the sieve size in mm that permits passage of 10% by weight of the sand. The uniformity coefficient (UC) of a sand is defined as d60/d10.
Sand needs to be of a fine grade ( 0.15-.35 mm is recommended), uniform (the UC should always be less than 3 and preferably less than 2), and be washed free of loam, clay, and organic matter. Fine particles will quickly clog the filters and frequent cleaning will be required. A sand that is not uniform will also settle in volume, reducing the porosity and slowing the passage of water. Sand manufacturers should be able to supply or blend sand to these specifications.
 Sewage Treatment Plant Slow Sand Filter
Drainage system
 
A gravel drainage system is provided at the bottom of the filter to prevent movement of the fine sand into the filter outlet. In European specifications this has consisted of 3 graded layers, 2-8mm,8-16mm,16-32mm. The use of a geo-textile fabric may be considered to support the sand as an alternative to some gravel layers. The bottom layer of gravel supports perforated drainage pipes which may simply bisect the filter or in a large filter form a network of connecting pipes across the base. The use of granulated rockwool as an alternative media to sand can reduce the requirement for the gravel drainage system and thus reduce the depth of the filter. A fine screen over the outlet would still be recommended to prevent rockwool granules from passing into the outflow.
 
Flow control
 
A regulating tap should be connected to the filter outlet to control the flow rate. On large filters a flow meter is sometimes installed for use in monitoring the flow rate. The flow rate is specified in terms of litres/hour per unit area of the surface of the filter ( m2). The flow rate through the filter is less than gravitational fall. Keeping the water level above the filter bed constant assists in maintaining an even flow. The flow rate will drop off with the build-up of material on the surface of the filter bed. An open clear pipe (poly tube) fixed to the exterior of the filter can be used to monitor head loss.


Technical parameters:
TPYE TANK SIZE
(mm)
TOTAL HIGH
(mm)
FLOW RATE
(m3/hr)
INLET AND OUTLET
(mm)
QUARTZ SAND
 (t)
YLD-MF-500 500*1500 2350 2 DN32 0.39
YLD-MF- 600 600*1500 2380 2-3 DN32 0.56
YLD-MF- 700 700*1500 2400 4 DN40 0.76
YLD-MF- 800 800*1500 2400 5 DN40 1
YLD-MF- 900 900*1500 2500 6 DN50 1.3
YLD-MF- 1000 1000*1500 2600 8 DN50 1.6
YLD-MF- 1200 1200*1500 2700 11 DN65 2.3
YLD-MF- 1400 1400*1500 2800 15 DN65 3
YLD-MF- 1500 1500*1500 2850 18 DN65 3.5
YLD-MF- 1600 1600*1500 2900 20 DN80 4
YLD-MF- 1800 1800*1500
1800*1800
3000 25 DN80 5
YLD-MF- 2000 2000*1500 3100 30 DN100 6
YLD-MF- 2200 2200*1500 3180 38 DN100 7.5
YLD-MF- 2400 2400*1500 3330 45 DN100 9
YLD-MF- 2500 2500*1500 3380 50 DN100 9.7
YLD-MF- 2600 2600*1500 3430 55 DN125 10
YLD-MF- 2800 2800*1500 3530 60 DN125 12.5
YLD-MF- 3000 3000*1500 3630 70-80 DN125 14
YLD-MF- 3200 3200*1500 3730 80~100 DN150 16
Product:
 
Sewage Treatment Plant Slow Sand Filter
Sewage Treatment Plant Slow Sand FilterSewage Treatment Plant Slow Sand Filter

Our services:

We provide 24 hours online customer service.

Any inquiry about water treatment system, please feel free to contact me for further details!

Contact information:
Mobile phone: +86 13585066069
 

 
Website: http://yldwater.en.made-in-china.com
Official website: yldwater.en.made-in-china.com
Guarantee period:1 year
After-sale service:800-827-87-226

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