Unpowered siphonic decant method and device

Abstract

The invention discloses an unpowered siphonic decant method and a device, wherein the device mainly comprises an exhaust valve (1), a vent pipe (2), an upper siphon (3), a flexible hose (4), a limit support (5), a lower siphon (6), a buoy (7), a siphon flow generation switch (8), an obturation switch (9) and a lowest liquid level switch (10); when a sewage treatment plant adopts a sequencing batch activated sludge process technology, a decanter is needed to decant the supernatant in a reaction tank; the unpowered siphonic decant method and the device decant mainly by depending on the gravity and the siphon principle; a section of U-shaped pipe, which is lower than a water outlet, is designed at the bottom of the lower siphon pipe; water in the U-shaped pipe can not be discharged all the time so as to play the role of sealing; and the invention has no power consumption, low initial investment and operating cost as well as strong applicability.

Description

technical field [0001] The invention provides a drainage method and equipment for sewage treatment, which is mainly applicable to the drainage equipment in the process flow of the CASS, ICEAS, DAT-IAT method and the like of the SBR process. It belongs to the technical field of sewage treatment. Background technique [0002] The main pollutants of urban sewage are organic matter, so biochemical methods are mostly used at home and abroad. In the biochemical method, there are two major categories of activated sludge method and biological filter. The vast majority. There are many forms of activated sludge process, and the most widely used are three types: traditional activated sludge process, oxidation ditch, and SBR process, among which oxidation ditch and SBR process have become the preferred processes for small and medium-sized sewage treatment plants in China. [0003] Decanter is the most commonly used key equipment in sewage treatment processes such as CASS method, SBR ...

AI Technical Summary

Problems solved by technology

The existing siphon decanter has poor control of the siphon measures, and the sealing of the underwater part is not very tight, resulting in the inability to form a siphon. At the same time, due to design reasons, it is impossible to ensure uniform decanting, and there is no effective way to control the decanting volume.

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