Hydrothermal and anaerobic ammonia oxidation combined multi-phase multi-stage biomass sludge treatment system and hydrothermal and anaerobic ammonia oxidation combined multi-phase multi-stage biomass sludge treatment method

Abstract

The invention discloses a hydrothermal and anaerobic ammonia oxidation combined multi-phase multi-stage biomass sludge treatment system and a hydrothermal and anaerobic ammonia oxidation combined multi-phase multi-stage biomass sludge treatment method. The system comprises a thermal hydrolysis reactor, a heat exchanger, a hydrolysis acid production reactor, an anaerobic methane production-nitrogenremoval reactor, an aerobic reactor and a granular sludge separation and enrichment device, wherein the thermal hydrolysis reactor is communicated with the heat exchanger, the hydrolysis acid production reactor is communicated with the anaerobic methane production-nitrogen removal reactor, the anaerobic methane production-nitrogen removal reactor is respectively communicated with the heat exchanger and the granular sludge separation and enrichment device, the liquid inlet end of the aerobic reactor is communicated with the heat exchanger, and the liquid outlet end of the aerobic reactor is communicated with the anaerobic methane production-nitrogen removal reactor. According to the invention, based on the difficulty in comprehensive sludge treatment and tail end discharge in the prior art, combined anaerobic and ammonia oxidation treatment is performed after sludge is subjected to hydrothermal enhanced hydrolysis, so that carbon source self-supply, comprehensive capacity and emissionreduction are achieved by utilizing the advantages of the hydrothermal enhanced hydrolysis technology.

Description

technical field [0001] The invention relates to the technical field of sludge recycling and advanced treatment, in particular to a multi-phase and multi-stage biomass sludge treatment system and method combined with hydrothermal anaerobic ammonium oxidation, which realizes sludge reduction and resource treatment at the same time, Solve the problem of its filtrate discharge. Background technique [0002] In recent years, the pretreatment method of "hydrothermal / thermal hydrolysis" can greatly improve the fluidity of sludge, improve its anaerobic digestion performance, and dehydration performance. Therefore, it has been widely recognized and applied. Sludge hydrothermal / thermal Hydrolysis combined with anaerobic digestion has become the mainstream technology in the sludge treatment industry. [0003] However, after hydrothermal treatment, most of the organic matter in the sludge is dissolved and hydrolyzed, and the hydrothermal sludge filtrate contains a relatively high conce...

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Problems solved by technology

[0004] If the digestive juice is treated separately, most of the organic matter in this part of the digestive juice is refractory, and it is difficult to be biodegraded

[0005] In the current existing technology, the treatment objects for the denitrification treatment of biomass solid waste only consider various sewage such as the final digestion filtrate, rather than the sludge treatment itself; The treatment process is that the sludge is firstly treated, and the wastewater after the sludge is treated, and then the wastewater is denitrified. In this way, the single item is treated step by step. The conventional process will cause a waste of steps, not only a waste of chemicals, and also increases processing time

[0006] And the existing traditional denitrification process such as A 2 / O process often has the problems of insufficient carbon source, high cost of adding a large amount of inorganic carbon source and poor denitrification effect when treating sludge digested liquid, and its low carbon-nitrogen ratio is also very unfavorable for biological denitrification

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