Rotary electro-osmotic sludge dewatering system and method for oxidative degradation of organic matters

Abstract

The invention relates to a rotary electro-osmotic sludge dewatering system for oxidative degradation of organic matters, the rotary electro-osmotic sludge dewatering system comprises an automatic reverse pole type constant-voltage constant-current power supply, a speed-adjustable electric drive device, a cathode rotating rod and a cylindrical electro-osmotic reactor, wherein an anode cylinder is arranged in the electro-osmotic reactor. The automatic reverse pole type constant-voltage constant-current power supply is respectively connected with the cathode rotating rod and the anode cylinder through wires; a medicine injection installation long hole is formed at the top of the electro-osmotic reactor and the anode cylinder; a spray type medicine spraying device is arranged in the medicine injection installation long hole; and a mud inlet and a mud outlet are formed at the bottom of the electro-osmotic reactor. The invention also discloses a dehydration method of the rotary electro-osmotic sludge dewatering system for oxidative degradation of the organic matters. According to the invention, a rotary electro-osmotic oxidation organic matter dehydration technology is adopted, so that the water content of sludge can be greatly reduced, the corrosion degree of the anode cylinder is greatly reduced, a medicament and the sludge are uniformly mixed, and the dehydration efficiency is greatly improved. The process of loading mud and taking out mud cakes is also convenient and quick.

Description

technical field [0001] The invention belongs to the technical field of sludge dewatering treatment, and in particular relates to a rotary electroosmotic sludge dewatering system and method for oxidative degradation of organic matter. Background technique [0002] Sludge is the product of sewage treatment, which consists of organic debris, bacterial cells, inorganic particles, colloids, etc. and complex heterogeneous bodies. With the rapid development of China's economy, urban sludge, oily sludge and medical sludge are also increasing. If they are not treated and disposed of in a standardized manner, they will cause secondary pollution to the ecological environment, and may cause harm to the health of animals, plants and people. Negative Effects. Studies have shown that deep dehydration of sludge can reduce the difficulty of its disposal, and can turn waste into treasure and reuse it. [0003] At present, most of my country's sewage treatment plants use mechanical dehydrati...

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Problems solved by technology

This process adds a large amount of inorganic conditioner, and the filtrate after treatment is strongly acidic. In the actual application process, the equipment is corroded, the process is complicated, and it is difficult to realize

[0006] As a new deep dewatering technology, electro-osmosis technology has begun to be applied to sludge dewatering. However, the traditional electro-osmosis technology still has many shortcomings: (1) When electro-osmosis dehydration technology is used alone, the anode of the sludge is seriously dried, and the mud cake Cracks appear, the contact area between the mud cake and the anode plate decreases, and the sludge dehydration effect becomes worse; (2) The electroosmotic anode plate is severely corroded; (3) The moisture distribution of the anode and cathode of the mud cake is uneven, the moisture content of the anode is low, and the cathode The moisture content is high, and the moisture content differs by 10%-20%

The sludge is dewatered to 75%-80% by mechanical pressure filtration, followed by coupled dehydration by electroosmosis and mechanical pressure filtration. Alternate pressure changes can reduce the moisture content of sludge to less than 50%, but the process is complicated and requires repeated application Pressure, the cathode plate needs a vacuum suction cup, which is easy to damage the equipment, and the sludge has a large difference in acidity and alkalinity, so it is impossible to directly carry out subsequent sludge disposal

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