Sewage disposal system

Abstract

The invention discloses a sewage disposal system. The sewage disposal system comprises a water pump, a second filtering unit and at least a first filtering unit, wherein the first filtering unit is gravity automatic backwashing filtering unit; the second filtering unit is biological filter unit; the gravity automatic backwashing filtering unit comprises a cavity having a water inlet, a sludge outlet and a water outlet, and a filtering plate; the water inlet and sludge outlet are located under the filtering plate; the water outlet is positioned above the filtering plate; one of the first filtering unit is in flow connection with the water pump through the water inlet, and in flow connection with the biological filter unit through the water outlet; and the filtering plate comprises a 2-5 mm thick filtering layer formed by bonding silica sand and / or film covered silica sand through binder and curing. The inventive system has good sewage disposal effect, and can be widely applied in sewage treatment field.

Description

technical field [0001] The invention relates to a sewage treatment system. Background technique [0002] With the improvement of people's awareness of environmental protection, there are more and more types of sewage treatment systems. The biological filter is a high-efficiency water treatment equipment, but in order to maintain the aerobic environment required for the survival of microorganisms on the surface of the filler in the biological filter, It is necessary to rely on blowers and other equipment to blow and aerate to increase the dissolved oxygen in the biofilter. Therefore, introducing a siphon device in the biofilter can realize automatic reoxygenation, which saves the energy consumption of relying on the power device to increase oxygen, but also due to the siphon effect , which reduces the filtration effect of the biofilter, so it is necessary to pre-treat the sewage through the filtration system before entering the biofilter. At present, the types of filtration ...

AI Technical Summary

Problems solved by technology

There are two forms of fiber filter material: fiber bundle and fiber ball. Both ends of the fiber bundle are fixed, and some fibers at the bound ends cannot be cleaned, resulting in rapid failure of the filter layer. It is necessary to stop production and replace the filter layer soon. When rinsing, the cleaning water cannot pass through the binding, and it is easy to form mud cores and cause ball formation. Finally, the filter layer has to be replaced for a short period of time. Once the central binding is loose, it will shed hair until it is completely scattered, and the fibers will enter the filter with water. It seriously affects the filtration quality; although the biofilm filter material has high filtration accuracy, the cost of the filter material is high, and it is not suitable for the filtration of general domestic sewage and lightly polluted water sources; granular filter materials include silica sand, white coal and ore, etc., silica sand Due to the wide range of sources and low cost, it is widely used. When using silica sand as a filter material, the current method is to naturally stack the silica sand in the gravity automatic backwash filter device to form a sand layer as the filter layer. Since the naturally stacked silica sand is loose structure, so only a certain thickness of accumulation can play a filtering role, so the sand layer is not easy to be washed clean during backwashing, and long-term use will easily cause sand layer pollution and blockage, and the water flow will be reduced. The silica sand needs to be removed for manual cleaning or replacement. Moreover, when the loose sand is filtered, the surface of the sand layer is easily loosened by water, which affects the filtration quality, and the phenomenon of sand leakage during backwashing is serious.

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