Powerless-aeration biological filtering bed

Abstract

The invention provides a powerless-aeration biological filtering bed, which is applied to an urban domestic sewage discharging port and is used for increasing dissolved oxygen in discharged domestic sewage and promoting degradation of pollutants in sewage. The powerless-aeration biological filtering bed comprises a vertical sewage containing pipe and a biological filtering bed, wherein water enters from the bottom part of the vertical sewage containing pipe and is discharged from the top part of the vertical sewage containing pipe; the biological filtering bed consists of more than two layers of pallets with uniform water-permeable holes in the bottom parts. By virtue of the pressure of a sewage discharging pipeline, sewage enters from the bottom part of the vertical sewage containing pipe and flows into the biological filtering bed from the top part of the vertical sewage containing pipe after being collected. The powerless-aeration biological filtering bed provided by the invention has the advantages that the shape is matched with the environment of the sewage discharging port, the size can be adjustd according to the flow rate of sewage of the sewage discharging port, power is not needed for driving, the aeration efficiency is high, and the powerless-aeration biological filtering bed can be combined with other water-environment restoration technologies can be achieved.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to an ecological filter bed which can effectively improve the dissolved oxygen in the outlet water of urban domestic sewage without power. Background technique [0002] With the rapid development of my country's economy, my country's water environment problems have become increasingly prominent, and urban and rural water environments have encountered unprecedented threats. If a survey shows that more than 90% of the rural water ecology in the Yangtze River Delta region has lost its basic functions, urban and rural rivers have been severely degraded due to pollution and ecosystems, and the water quality of the rivers has basically fallen into Class V or worse. Nutritization, lack of oxygen in the water body, turning black and smelly, resulting in a severe environmental and ecological situation. Urban and rural domestic sewage is one of the main pollution...

AI Technical Summary

Problems solved by technology

There are many aeration methods now, such as compressed air diffusion method, low-speed surface aeration method, etc., but these methods require power, and the application and maintenance costs are high. The height difference of the pool automatically aerates the device without power aeration. For example, the Chinese utility model patent CN202625913U discloses a "zigzag"-shaped multi-layer water passing board to increase the water flow rate by using the water inlet and the water tank drop. It is a device that is in contact with air to achieve the purpose of aeration, but the application range of this device is limited, and it can only be used under the condition that there is a direct drop between the water inlet and the reservoir. It is suitable for use under the conditions of small space and high environmental restrictions

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