Compound three-dimensional electrode reactor and application thereof in treatment of nitrogenous organic wastewater

Abstract

The invention belongs to the technical field of environmental engineering, and relates to a device for treating wastewater, in particular to a three-dimensional electrode reactor which can effectively degrade nitrogenous organic wastewater and a treating process thereof. The main electrodes of the reactor respectively consist of two copper-zinc alloy electrodes and a titanium-iridium-platinum steady-state anode; active carbon is filled between the main electrodes; a part of active carbon is made into insulated particles through coating polyvinyl alcohol gel; and the proportion of the insulated active carbon particles to conductive active carbon particles is between 1: 6 and 6: 1. After a certain voltage is applied, the cathode undergoes nitrate reduction reaction, and the anode oxidizes ammonia nitrogen into nitrogen and mineralizes or converts COD into a simple organic matter. The existence of the filler can effectively strengthen the current efficiency of the reactor, reduce the energy consumption and improve the mass transfer efficiency; and therefore, the invention provides wastewater denitrification device and process with high current efficiency, simple operation, and capabilities of efficiently removing nitrate, ammonia nitrogen and COD and keeping energy consumption at an acceptable level.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering, and specifically relates to a waste water treatment device, to be exact, a three-dimensional electrode reactor device and process capable of effectively degrading nitrogen-containing organic waste water, and its application in the treatment of nitrogen-containing organic waste water application. Background technique [0002] In recent years, with the gradual expansion of human production and living activities, the total amount of nitrogen discharged into the water body has continued to increase, resulting in eutrophication of the water body and the excessive reproduction of algae, which has seriously affected the aquatic ecosystem. , Excessive nitrite and nitrate also seriously threaten human health. In the face of increasingly serious water nitrogen pollution, it is of practical significance and value to strengthen and deepen the research on wastewater denitrification technolo...

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Problems solved by technology

[0006] The technical problem to be solved in the present invention is that the existing three-dimensional electrode electrochemical reactor has strong oxidizing ability but poor ability to reduce nitrate nitrogen, while the three-dimensional electrode-biofilm reactor has strong denitrification ability but is not good for ammonia nitrogen, COD To remove unsatisfactory defects, on the basis of the research on the three-dimensional electrode oxidation reactor, by introducing a new electrode pair, the copper-zinc alloy electrode is used as the cathode, and the DSA oxide-coated electrode—Ti / IrO 2 – The Pt electrode is used as the anode. While ensuring that the reactor has a good oxidation ability, it can also improve its removal effect on nitrate nitrogen, and develop a new type with high current efficiency, strong oxidation ability, good nitrogen removal performance, easy operation, and wide application range. Wide range of wastewater treatment devices and processes have positive significance for the treatment of nitrogenous organic wastewater

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