Device for enriching and recycling organic carbon in municipal sewage and method for applying device

Abstract

The invention relates to a device for enriching and recycling organic carbon in municipal sewage and a method for applying the device. The device comprises an enriching system, a separating system and a recycling system which are sequentially fittingly connected with one another by pipelines. The enriching system comprises a grate, an organic carbon enriching tank and an organic concentration tank which are sequentially fittingly connected with one another; activated sludge and combined chemical agents are arranged in the organic carbon enriching tank; the municipal sewage sequentially flows through the grate, the organic carbon enriching tank and the organic concentration tank and then flows into the separating system via the corresponding pipeline; the separating system comprises a secondary sedimentation tank and a sludge concentration tank; the recycling system comprises an anaerobic digestion fermenting tank and a combined heat and power generation device; heat energy and electric energy of methane generated after the municipal sewage is treated by the anaerobic digestion fermenting tank can be utilized by the aid of the combined heat and power generation device. The device for enriching and recycling the organic carbon in the municipal sewage and the method have the advantages that the device is simple in structure and reasonable in design, energy consumption can be effectively reduced, adsorption removal effects of the organic carbon can be improved, the sewage recycling cost can be saved, the energy utilization rate can be effectively increased, and the like.

Description

technical field [0001] The invention relates to the technical field of urban sewage treatment, in particular to a device for enriching and reusing organic carbon in urban sewage and a method for using the same. Background technique [0002] At present, most of the urban sewage treatment in our country adopts the traditional activated sludge technology. Although it has the advantages of stable operation and good effluent quality, with the continuous deepening of the understanding of urban sewage treatment technology and the new requirements for energy saving and consumption reduction of sewage treatment plants It is pointed out that the disadvantages of traditional wastewater treatment technology are gradually emerging. In order to achieve the goal of COD reduction, organic carbon in wastewater is oxidized into carbon dioxide under aerobic conditions. Since this process needs to provide a large amount of oxygen, it consumes a lot of energy. The organic carbon contained in ur...

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Problems solved by technology

However, due to the quality of wastewater, the sludge in urban sewage treatment plants in my country usually has a high moisture content and low organic matter components, which directly limits the application of sludge anaerobic digestion.

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