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Disc filters are water filters with stacked discs that catch impurities as water flows over them. They are used for watering plants and removing metallic impurities from water. Plants are more sensitive to impurities than people, and the filter needs regular cleaning to prevent buildup. Large models can be used for metallurgical material, and the discs spin to collect and dry the material.
A disc filter is a special type of water filter that includes a cartridge in the form of many discs stacked on top of each other and the discs are capable of removing impurities from the water. This causes water to pass over the discs and small grooves carved into the discs catch any impurities. Disc filter units are mainly used for watering plants, but very large models have also been used by metallurgists to remove metallic impurities from water. Cleaning a stationary stack of discs can be difficult, so the disc filters can be loosened, allowing the discs to move and operators to clean impurities from the filter.
There are many types of water filters, all made for a specific purpose, which is to capture impurities in a certain way. A disk filter features a filter that looks like a column of disks stacked on top of each other. Each disc has small grooves which are made to catch impurities as the water flows over the discs.
While people can be adversely affected by bacteria in water, naturally occurring impurities in water generally don’t affect them much unless those impurities are found in high concentrations. Plants, however, are not as resistant to even low levels of impurities such as sodium, sulfate and chloride, because the impurities directly harm the plant or change the potential hydrogen (pH) levels of the soil. If the pH of the soil becomes too alkaline or too acidic, it could stunt a plant’s growth or kill it.
The discs on a disc filter are made to have a constant deposit of impurities, so the filter will need to be cleaned on a regular basis. Failure to clean this filter will cause it to fill up and impurities that would have been caught will flow past the filled grooves and remain in the water. To help clean the discs, the filter can usually be loosened to allow the discs to rotate and move. This allows operators to clean everything away from the filter without having to completely disassemble it.
Watering plants is the primary use of a disc filter, but it can also be used to clean water filled with metallurgical material. The discs of this filter are much larger than those of the irrigation models. With this filter the discs spin and collect the material; the material then clumps at the sides so it’s easier to lift. The discs spin until they are above a drying area, where the disc is usually treated with heat to help the material dry. Once dry, the material breaks down, either by itself or with help, and is disposed of.
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