Municipal activated sludge treatment catalyst body, sludge treatment system and sludge treatment method

Abstract

The invention discloses a municipal activated sludge treatment catalyst body, a sludge treatment system and a sludge treatment method, belonging to the technical field of municipal engineering sludgetreatment. The catalyst body takes a stainless steel material as a carrier; the surface of the stainless steel material is loaded with a noble metal oxide layer; noble metal oxides are solidified on the surface of the stainless steel material by sintering or sputtering; the structure of the stainless steel material is a circular, rectangular or polygonal tube body, and a plurality of through holesare formed in the wall the tube body; the noble metal oxides are any one or more of a platinum oxide, a rhodium oxide, a palladium oxide and an iridium oxide. The plurality of through holes are formed in the side wall of the catalyst body, so that a larger specific surface area can be obtained, the contact area between sludge and the catalyst body is enlarged, and the reaction time is further shortened; furthermore, the self weight of the catalyst body is further reduced, so that the speed, at which the catalyst body moves up and down as rolling over along with a mixture in a reactor, is accelerated, and the sludge treatment efficiency is increased.

Description

technical field [0001] The invention relates to the technical field of municipal engineering sludge treatment, in particular to a municipal activated sludge treatment catalytic body, a sludge treatment system and a sludge treatment method. Background technique [0002] At present, the activated sludge method is a treatment method commonly used in urban domestic sewage treatment plants, and it has a history of nearly a hundred years. A large amount of sludge will be generated during the activated sludge treatment process. The sewage treatment plant needs to concentrate, dehydrate and digest the generated sludge. The treated sludge needs to be landfilled, anaerobic digestion or Incineration disposal, such a cumbersome sludge treatment and disposal process requires very high costs as a support, which can account for 25% to 60% of the total operating costs of the entire sewage treatment plant, and the cost is very high, but the post-processing of the existing technology uses Th...

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Problems solved by technology

In the whole process of sludge anaerobic digestion, the rate of hydrolysis process is slow, which is the rate-limiting stage, resulting in the disadvantages of long residence time of sludge anaerobic digestion (generally more than 30 days) and low gas production.

[0006] The main reason for the high water content of the sludge after mechanical dehydration is that the biological cells and colloids in the sludge contain a large amount of "intracellular water" (accounting for 70% of the total water content) which cannot be fully squeezed out by the pressure of traditional mechanical dehydration. When the moisture content of the mud is between 60% and 65%, it is viscous, and the water molecules are wrapped by a layer of colloid. This area is called the "viscose phase area" of the sludge, which is the most difficult stage of sludge dehydration. The traditional mechanical dehydration method is difficult to further remove

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