Solar aerobic granular sludge sewage treatment plant

Abstract

The invention provides a solar aerobic granular sludge / sewage treatment device which comprises a reactor, a water inlet system, an aeration system, a water drainage system and a PLC control system, wherein the bottom of the inside of the reactor is provided with an aeration disc, the center of the aeration disc is fixedly provided with a bearing, the bearing is provided with a screw fitting with the bearing, the screw is running by a motor, and a spiral pore plate is fixedly arranged on the screw. According to the invention, the spiral pore plate changes the characteristics of a water flow in the reactor by rotating, and a vortex flow is formed behind a pore, so that the increasing of the collision rate among granules is facilitated, and the initial-stage formation speed of aerobic granular sludge is greatly accelerated, therefore, a system is running stably, the efficiency of sewage treatment is increased, and a purpose of saving energy is achieved.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a solar aerobic granular sludge sewage treatment device. Background technique [0002] As a new sewage biological treatment technology, aerobic granular sludge is more suitable for the development of less land occupation, integrated and ecological sewage treatment process than the traditional activated sludge method, and it has high sewage treatment efficiency and sludge settlement performance. It has good advantages and has broad application prospects, but the start-up and operation stages of the system, that is, the particle formation and stability maintenance stages, are sensitive to changes in environmental conditions, such as water temperature, dissolved oxygen and water flow conditions in the reaction device, which require strong hydraulic shear. cutting effect is formed. In the prior art, a columnar reactor with a large aspect ratio is widely used to increase the shear for...

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Problems solved by technology

In the prior art, a columnar reactor with a large aspect ratio is widely used to increase the shear force of the particles along the column height direction, which may easily lead to low water treatment efficiency, and is affected by the weight of the sewage in the reactor, and the aeration at the bottom of the device The ascending flow rate of the gas gradually decreases, and the mixing of the gas and water is insufficient, so that the upper particles are subjected to little hydraulic shearing effect, and the particles are difficult to form in the initial stage of the reaction. Divergent growth, difficult to maintain a dense structure, resulting in unstable system operation

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