High Dryness Sewage Sludge Treatment Method

Abstract

The invention discloses a high-dryness sewage sludge treatment method. According to the method, an active gas generator introduces active gas into a spiral shaft, sewage sludge enters a spiral filtering apparatus, and in the front section of the spiral filtering apparatus, sewage sludge undergoes dehydration under the action of the gravity of sewage sludge; the spiral shaft rotates to drive sewage sludge to move forward, and in the rear section of the spiral filtering apparatus, sewage sludge is extruded between spiral blades and a spiral drum so as to realize spiral dehydration; sewage sludge having undergone spiral dehydration enters an oxidation drum and further undergoes full oxidation under the action of active gas; and sewage sludge from the oxidation drum enters an ultrahigh-voltage electro-osmosis dehydration apparatus and undergoes electro-osmosis and ultrahigh voltage coupled dehydration so as to obtain high-dryness sludge. The high-dryness sewage sludge treatment method provided by the invention has a wide application scope and low energy consumption, is beneficial for sludge reduction and enables treated sludge to have low water content.

Description

technical field [0001] The invention relates to the field of sewage sludge treatment, in particular to a high-dryness sewage sludge treatment method. Background technique [0002] As of 2015, the amount of sludge in my country has reached 40 million tons (80% moisture content), and it is expected to reach 60 million tons by 2020. If such a huge sludge cannot be properly resolved, it will have a significant impact on the environment and become a A big burden on people's production and life. Due to the high water content of sludge, difficult dehydration, rich in organic matter, easy to rot, and odorous; it contains pollutants such as pathogenic microorganisms and heavy metals, which makes the disposal and treatment of sludge very troublesome. [0003] According to my country's "Sludge Treatment and Disposal and Pollution Prevention and Control Technology Policy of Urban Sewage Treatment Plants", the treatment and disposal of urban sewage sludge must follow the principles of st...

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Problems solved by technology

[0008] In view of this, the present invention aims at the problems in the above-mentioned prior art that the moisture content of the dehydrated sludge is too high, there are many wearing parts, the energy consumption is large, and it is not conducive to the reduction, and provides a kind of High-dryness sewage sludge treatment system with low sludge volume, favorable sludge reduction and low sludge moisture content

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