External circulation two-stage sludge anaerobic digestion system and application thereof

An anaerobic digestion system and anaerobic digestion technology, applied in the field of sludge resource treatment, can solve the problems that the anaerobic digestion process has not received attention, limit the advantages of anaerobic digestion technology, and the degree of sludge degradation is poor, and achieve a compact structure , high organic load and organic matter removal rate, and the effect of improving operation stability
CN102583934AInactive Publication Date: 2012-07-18盐城同济环科固体废物处理处置有限公司 +2
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
盐城同济环科固体废物处理处置有限公司
Publication Date
2012-07-18
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention belongs to the field of recycling treatment of sludge and relates to an external circulation two-stage sludge anaerobic digestion system and an application thereof. The system comprises a primary high-temperature anaerobic digestion reactor (1), a circulating reflux system (2), a secondary medium-temperature anaerobic digestion reactor (3), a methane pool (4), a sludge collecting pool (5), a sludge mixing pool (6) and a pretreatment device (7), wherein the circulating reflux system (2) is arranged between the pretreatment device (7) and the primary high-temperature anaerobic digestion reactor (1). The system organically combines the technologies of performing two-stage anaerobic digestion, hydrolyzing organic matters at a high temperature, performing circulating reflux and the like, combines a physical enhanced treatment technology with a microbiological treatment technology, really realizes high-efficiency utilization of organic substrates, can exert highest activity of bacteria in two sections, and improves the operational stability of the whole system.
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Description

technical field

[0001] The invention belongs to the field of sludge resource treatment, and relates to an anaerobic digestion system and its application. Background technique

[0002] my country has built a large number of sewage treatment plants. As of 2009, 1,792 urban sewage treatment plants have been built nationwide, with a treatment capacity of 99.04 million m 3 / d, the average operating load rate is 81.27%. While the construction and operation of these sewage treatment plants have played an important role in the reduction of urban pollution load, the amount of urban sludge, a by-product of the sewage treatment process, is also increasing day by day. At present, the annual production of wet sludge in the country is nearly 30 million tons (water content 80%), and the center of sludge treatment and disposal has shifted from simple landfill to resource-based land use. Before the sludge is used for land use, it is necessary to stabilize the sludge to recover a large amou...

Claims

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