Physical decomposition method of activated sludge and device thereof

Abstract

The invention discloses a physical decomposition method of activated sludge and a device thereof; the physical decomposition method comprises the following steps: (1) feeding activated sludge into a sedimentation tank for sedimentation and concentration; (2) feeding activated sludge into a feed inlet of a physical decomposer after concentration; (3) boosting pressure to 10000-50000psi; (4) causing high pressure fluid to pass through the feed inlet in a vertical or suberect way; sucking activated sludge at the feed inlet out, shearing, decomposing and bringing to high speed airflow; (5) causing high pressure airflow with activated sludge particles to pass through a spray pore of 10-200 microns to be ejected to a reactor at sound velocity; (6) causing the ejected activated sludge jet flow in the reactor to collide with each other or to be sheared at high speed by brute force, further breaking, dispersing, and causing the particles to reach smaller particle size and narrower distribution. The device is provided with the feed inlet, a pressure device and a high shearing region; the back of the device is the reactor which is provided with the small spray pore. The invention does not add chemical substances in the activated sludge. VSS can be reduced by 17%, and COD can be increased by 5645mg / L.

Description

technical field [0001] The invention relates to an environmental protection process and equipment thereof, in particular to a physical decomposition method of activated sludge and the physical decomposition equipment of activated sludge used in the method. Background technique [0002] In order to meet people's requirements for clean water and a high-quality environment, sewage treatment in large cities has become an urgent task. However, in the prior art, the operation of sewage treatment plants in large cities uses activated wastewater to undergo biological treatment to achieve the effect of purifying water quality. This treatment method will produce a large amount of discarded activated sludge. More and more activated sludge has become a threat to the safe operation of sewage plants. With the continuous increase of large-scale sewage treatment plants in various countries, how to safely, flexibly and economically treat the sludge produced by sewage plants so that it will ...

AI Technical Summary

Problems solved by technology

Because it needs to add chemicals to the waste activated sludge to achieve the effect of sludge hydrolysis, it will increase the cost of drugs and the increase of impurities such as salts in the hydrolyzed sludge, causing troubles in the operation of wastewater treatment plants and The adverse effect of increasing chemical pollutants, etc., causes secondary pollution on the environment, and is often restricted in application, and this activated sludge containing chemical pollutants has problems such as being unable to carry out organic composting.

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