Industrial sand filters are commonly used for removing suspended solids from the water using a single-size filtration media. The filtration process can be decided by adjusting the size of the filter sand. The ideal size of each granule usually varies from 0.35mm to 1.2mm.
Industrial sand filters can have graded support media layers or be directly installed over or on a distribution plate. This water treatment technique can also be combined with other filtration techniques such as activated carbon. Let’s help you understand more about Industrial Sand filters, their advantages, disadvantages, and how they actually work.
As the name suggests, sand filters are filled with sand, commonly used for different industries. The sand of different particles is stored in a sand filter, and the bottom of the sand filter contains porous double bottom – collector. The sand is often found in a mild-steel, plastic, or concrete housing.
Multi-media sand filtration are another industrial sand filter solution. It is performed to remove suspended solids of finer sizes. These filters usually have multiple layers of filter media, which gathers removed finer particles and solid loading. A typical multi-media sand filter has three layers of filling such as anthracite, gravel, and sand.
Industrial sand filters can filter particles down to 10 to 25 microns and achieve at least 5-micron filtration depending upon filter vessel sizing and arrangement. When water flows down the bed, it experienced different layers of filtration media. It is known as multi-media sand filters. Eventually, smaller particles are removed by each layer which provides accurate depth filtration and typically increases the filter capacity.
The various biological and physical processes can also be used in a sand filter that can remove more components. The particles will be collected in the upper layer of the sand filter. To prevent a clogged filter, the water filtration experts will backwash the filter in which extracted particles are flushed out so that the filters can be reused again.
Some custom industrial sand filter experts can support your project from start to end. Different industrial sand filters are used based on the properties of the process that needs water treatment. Following are the factors that can help in determining the size of industrial sand filters:
Below are some of the key advantages industrial sand filters offers:
Industrial sand filters offer many advantages; however, it has a few cons which one should consider:
As industrial sand filters extract turbidity from incoming water flow, the filter will show a high-pressure drop across the bed. Thus, it requires a backwash to clean the bed.
The backwash has to be performed once the pressure drop across the bed drops below a target threshold. A standard pressure drop ranges between 3 to 7 PSI, so it has to be considered before initiating a backwash.
A backwash should be performed each time the media reaches capacity which should be about once a week for a properly designed system.
The jagged edges of sand and media can become rounded over a long time, and thus, reduces the filtration ability after some years of service and need to be replaced.
A trained service technician from Water Professionals can help you re-load media, improve filter performance, and perform other necessary maintenance and troubleshooting on any make or model industrial sand filter.
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