Biological slow filtration equipment suitable for small centralized water supply plant in mountainous area

Abstract

The invention relates to biological slow filtration equipment suitable for a small centralized water supply plant in a mountainous area. The equipment comprises a high level cistern, a slow filtration tank, a three-way water level regulator, a porous water distribution pipe and a rain cover, wherein the top of the slow filtration tank is provided with the rain cover, the slow filtration tank is internally fixedly provided with a support layer, a filter material layer is placed on the support layer, an overlying water area is above the filter material layer, the bottom of a water collecting area is connected to the water inlet of the three-way water level regulator through a water pipe, the water inlet of the three-way water level regulator is higher than a plane in which the top surface of the filter material layer is located, the ventilation port of the three-way water level regulator is upward, and the water outlet of the three-way water level regulator is connected to a clean water tank through a water pipe. The equipment has the beneficial effects that a certain overlying water layer can be maintained in the biological slow filtration tank through the arranged three-way water level regulator, thereby ensuring that a biological filtering membrane does not deteriorate or die; rain and other pollutants can be prevented from entering the slow filtration device and polluting water by the rain cover, and the illuminating effect is not influenced.

Description

technical field [0001] The invention relates to the technical field of biological slow filtration equipment, in particular to a biological slow filtration equipment suitable for small-scale centralized water supply plants in mountainous areas. Background technique [0002] The construction of water treatment structures in traditional conventional water treatment processes is complicated, operation and maintenance are difficult, and management personnel need to have a relatively high level of education, which is not suitable for the construction of water plants in rural areas. Biological slow filtration technology has the advantages of simple construction, local filter materials, low investment cost, and simple daily operation and maintenance. The bio-slow filtration water purification technology can purify the water of mountain streams, springs, and weir ponds (the turbidity should be lower than 20NTU), and then it can reach the sanitary standard of drinking water (GB 5749-2...

AI Technical Summary

Problems solved by technology

[0005] 1. Some brick-built slow filters and devices ignore the effect of the overlying water depth. Due to the untimely management of drinking water projects in rural areas, the biofilm on the surface of the filter material will eventually deteriorate or die due to water shortage. It will take a long time to restore the project operation. The continuous operation of the biological slow filter cannot be guaranteed

On the other hand, by manually adjusting the water level, it needs to be monitored around the clock, which increases the management cost;

[0006] 2. The microbial action of the slow filter device requires sufficient dissolved oxygen in the water. Many slow filter devices are airtight and do not have an oxygen suppression unit, so the oxygenation process of the water cannot be realized; and many bricks or devices do not maintain the slow filter device. Therefore, there is an urgent need for a non-airtight rain shield, which can not only ensure the light, but also prevent pollutants from entering the slow filter device;

[0007] 3. Lack of disinfection function;

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