Sequencing batch leachate integrated carbon and nitrogen removal device and method based on electrochemistry

Abstract

The invention discloses a sequencing batch leachate integrated carbon and nitrogen removal device and method based on electrochemistry, and the device comprises a first carbon material electrode, a second carbon material electrode, a first metal oxide electrode and a second metal oxide electrode which can synchronously rotate along with a rotating shaft in the vertical direction. The axis direction of the rotating shaft is parallel to the water flow direction. An electromagnetic device capable of adsorbing magnetic iron compound particles and an aeration device capable of supplying oxygen are arranged at the bottom of the inner cavity, and a plurality of stirring devices are further arranged in the inner cavity. According to the sequencing batch leachate integrated carbon and nitrogen removal device and method, the heterogeneous electro-Fenton system and the electro-oxidation system are combined to form the sequencing batch leachate integrated carbon and nitrogen removal device and method, so that step-by-step targeted efficient removal of organic matters and ammonia nitrogen in the leachate can be realized, and the nitrogen removal defect of a single electro-Fenton system and the carbon removal defect of a single electro-oxidation system are made up. And meanwhile, the method has the advantages of small occupied area, strong in-situ retention of the catalyst, low generation risk of chlorine-containing by-products and the like.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and in particular relates to an electrochemical-based sequencing batch leachate integrated carbon and nitrogen removal device and a method thereof. Background technique [0002] At present, with the substantial growth of population and the rapid increase of consumption demand, the demand for domestic waste treatment is constantly increasing. At present, technologies such as landfill, incineration, and aerobic composting have become important means to effectively solve the problem of garbage siege. However, the process of domestic waste treatment will also be accompanied by certain secondary pollution problems, among which the pollution of leachate is one of the problems that cannot be ignored. Leachate usually contains high concentrations of organic matter, high concentrations of ammonia nitrogen and high concentrations of chloride ions, and belongs to a type of wastewater with high concentration...

AI Technical Summary

Problems solved by technology

Electro-Fenton is an advanced oxidation process based on traditional Fenton oxidation, which can generate Fenton reagent in situ, which has the advantages of no need for chemical dosage and high mineralization degree of organic matter, but the strong oxidizing substances produced in the electro-Fenton process ——Hydroxy radicals cannot effectively remove ammonia nitrogen, and there are denitrification defects

Electrooxidation is an electrochemical process closely related to the properties of the anode material and the characteristics of the sewage. In chlorine-containing wastewater, the chlorine ions in the wastewater can be converted into hypochlorous acid through the chlorine-analysis anode, and then chlorine can be added by using the breakpoint. According to the principle, the effective removal of ammonia nitrogen can be achieved, but the complete mineralization of organic matter cannot be achieved, there is a defect in carbon removal, and there is a risk of organic chloride production

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