System and method for automatically separating solid from liquid by self-thermal high-temperature aerobic digestion of mud

Abstract

The invention discloses a system and a method for automatically separating solid from liquid by mud self-thermal high-temperature aerobic digestion. The system comprises a mud discharging device, a mud aerobic digestion device, a solid-liquid two-phase spearing and solid concentrating device. The mud aerobic digestion device comprises three hydraulic separated independent function areas: an intrinsic cycle area, a complete mixing area and a high-temperature sterilizing area, for respectively processing the mud digestion and sterilizing. A mud exit system of the mud aerobic digestion device is provided with an air hoisting tube and the mud exits out from the bottom. The mud digestion of invention can acquire the effect that more than 40% of organic matter can be removed when the mud stays four days; the power consumption for removing one kilogram of organic matter is 1.4kW.h and killing the pathogenic agent in the mud meets the standard of 'found nothing'. The mud automatically separating and concentrating of the invention can acquire the effect that the SS capturing ratio in mud is higher than 99% and the solid-containing ratio of the concentrated mud is higher than 12%.

Description

Technical field [0001] The invention relates to a system and method for aerobic digestion of urban sludge and automatic separation and concentration of products by using a well-type sludge aerobic digestion reaction device, in particular to a well-type internal circulation sludge aerobic digestion reaction Device. Background technique [0002] Municipal sludge is a by-product produced during the biological treatment of municipal sewage. Microorganisms use the organic matter in the sewage as a substrate for metabolism, and the excess bacteria produced by self-proliferation and the solids produced by the separation of suspended substances in the sewage through physical and chemical effects (such as precipitation and flocculation) constitute urban sludge. Qualitatively speaking, urban sludge is an extremely complex heterogeneous body composed of organic debris, bacterial cells, inorganic particles, and colloids. As far as the nature of urban sludge in my country is concerned, the ...

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Problems solved by technology

The method of mechanical agitation in ATAD only promotes the mass transfer of sludge and oxygen, but does not effectively reflux the high-temperature digestion bacteria. To slowly degrade organic matter and slowly heat up the system;

[0026] ●N to NH in ATAD sludge products 4 + form, and the sludge product contains a large amount of protein and fat. The existence of monovalent cations and polymers has an adverse effect on the adsorption and bridging of coagulation, which affects the dehydration performance of the sludge product;

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