Method for performing electrolytic treatment on high-concentration ammonia nitrogen wastewater by using three-dimensional electrodes

Abstract

The invention discloses a method for performing electrolytic treatment on high-concentration ammonia nitrogen wastewater by using three-dimensional electrodes. The method comprises the following steps: (1) treating the high-concentration ammonia nitrogen wastewater by using a three-dimensional electrode electrolysis device; (2) enabling effluent water treated by the three-dimensional electrode electrolysis device to enter a flocculation reaction tank, adding chemicals for flocculation reaction treatment, and adding sodium hydroxide to regulate the pH of the wastewater to 8-9, wherein the reaction treatment time is 10-30 minutes; (3) enabling effluent water after the flocculation reaction treatment to enter a vertical flow reaction sedimentation tank for sedimentation treatment, wherein the sedimentation reaction time is 60-180 minutes; (4) enabling effluent water after the sedimentation treatment to enter a clean water tank. According to the method, by virtue of characteristics of high electrolytic current efficiency, big specific surface area, strong oxidative degradation ability and the like of the three-dimensional electrodes, the purpose of simply, efficiently and rapidly degrading the high-concentration ammonia nitrogen is achieved, and the wastewater reaches the discharge standard.

Description

technical field [0001] The invention belongs to the field of wastewater treatment, and in particular relates to a method for electrolytically treating high-concentration ammonia nitrogen wastewater by using a three-dimensional electrode. Background technique [0002] Ammonia nitrogen is a nutrient in the water body, which can lead to eutrophication of the water body, causing a large number of aquatic plants such as aquatic plants and blue-green algae to multiply, excessively consuming dissolved oxygen in the water, forcing fish and other aquatic organisms to die due to lack of oxygen, and ammonia nitrogen wastewater is harmful to fish and Some aquatic organisms are also toxic. In addition, when the sewage containing a small amount of ammonia nitrogen is reused in industry, it has a corrosive effect on certain metals, especially copper, and can also promote the reproduction of microorganisms in water pipelines and water equipment, forming biofouling, and blocking pipelines an...

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Problems solved by technology

The chemical precipitation method has a good removal effect and can form a compound fertilizer magnesium ammonium phosphate, but the treatment cost is high, and it is easy to cause secondary pollution of residual phosphorus; the stripping method is a commonly used physical and chemical denitrification technology at present, but there is frequent fouling of the stripping tower, low temperature The removal efficiency of ammonia nitrogen is low at the same time, and the secondary pollution of the stripping gas is a problem; the denitrification efficiency of the breakpoint chlorine method is high, but the by-products chloramine and chlorinated organic matter are likely to cause secondary pollution; the purification efficiency of the catalytic oxidation method is high, but the catalyst It is easy to be lost, and the equipment is easy to corrode; the traditional biological method is only suitable for treating low-concentration ammonia nitrogen wastewater, and must be pretreated before treating high-concentration ammonia nitrogen wastewater

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