Granular sludge sewage treatment device capable of controlling diameter and density of granules

Abstract

The invention discloses a granular sludge sewage treatment device capable of controlling diameter and density of granules. The device comprises an inner barrel and an outer barrel which are concentric; an aeration device is arranged in an annular space between the inner barrel and the outer barrel; the aeration device is fixed on a pedestal through a supporting pile of the aeration device; the inner barrel wall of the inner barrel is connected with a cylindrical cyclone cylinder; the lower end of the cyclone cylinder is connected with a wall through pipe, the wall through pipe passes through the walls of the inner barrel and the outer barrel, and the side wall of the cyclone cylinder is provided with an overflow hole; and a water inlet funnel is fixed at the upper barrel port of the inner barrel, the water inlet funnel is connected with a spiral thin bent pipe, and the outlet of the thin bent pipe is tightly attached to the inside wall of the cyclone cylinder. On the basis of ensuring good outlet water quality, the device successfully realizes human control and selection of the diameter and the density of the aerobic sludge granules, and realizes proper solid-liquid separation; in addition, through the device, the initial granule forming speed is high, and the sludge load is balanced; the oxygenation efficiency is improved by gas-liquid separation; and the device has the advantages of energy conservation and high efficiency.

Description

technical field [0001] The invention belongs to the field of sewage treatment and relates to a sewage treatment device, in particular to a granular sludge sewage treatment device capable of controlling particle size and density. Background technique [0002] Since the aerobic granular sludge sewage treatment process was reported in the late 1990s, it has attracted more and more attention from environmental engineering scholars. Because aerobic granular sludge has strong load impact resistance and good sludge sedimentation effect, it can greatly shorten the sludge settling time, reduce the footprint of sewage treatment plants, and reduce project costs. It is known as the next generation of sewage treatment new technology. However, the long-term stability of aerobic granular sludge is the bottleneck that limits the popularization and application of this technology. The main reason is that the particle size of aerobic granular sludge is difficult to control during the cultiva...

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Problems solved by technology

[0005] Nowadays, the cyclone technology has been widely used in the primary treatment in the field of water treatment, such as the cyclone sedimentation tank, etc., but there is no report on the direct application of the biological treatment process.

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