Device and method for intensifying deep phosphorus and nitrogen removal by intervening weak electric energy into artificial wetland based on pyrite filler

Abstract

The invention discloses a device and a method for intensifying deep phosphorus and nitrogen removal by intervening weak electric energy into an artificial wetland based on pyrite filler. The nitrogen and phosphorus removal efficiency of the constructed wetland can be enhanced by moderate direct current, but local over-acidity or over-alkalinity is easily caused in cathode and anode areas. The direct current and the pyrite are respectively arranged in the aerobic area and the anaerobic area which are naturally formed due to different depths of the artificial wetland, the phosphorus removal effect of the constructed wetland is enhanced through the oxidation process of the pyrite, and the oxidation utilization rate of the pyrite is enhanced through the change of the oxygen concentration and pH influenced by the anode and the cathode, and thus the dephosphorization efficiency is further enhanced. Meanwhile, the pyrite can moderately maintain the pH stability of the cathode and anode areas, so that the microbial activity is ensured. According to the invention, the pyrite is properly arranged in the weak electric energy intervention constructed wetland, so that the phosphorus removal can be further improved, the denitrification effect can be enhanced, and local acidification and alkalization caused by direct current can be eliminated to a certain extent.

Description

Technical field [0001] The present invention belongs to the field of environmental technology and water treatment, and more particularly to a stable weak electrical energy of a thironom ore filler to intervene in artificial wetland pH and to strengthen depth of phosphorus and nitrogen. Background technique [0002] With the rapid development of the chemical industry, the pollution of water resources available in my country is getting more serious, and too little water resources will greatly limit human social activities. The annual chemical park sewage treatment plant produces a large number of tail water, these tail water contains nutrients such as nitrogen, phosphorus, and is directly discharged to natural water. The deepening of such tail water is expected to increase its water quality from the primary A standard to the surface V water standard or more, thereby reused the reuse of tail water, which avoids emitting too much nitrogen phosphorus, and relieves a certain extent Wat...

AI Technical Summary

Problems solved by technology

[0005] People usually use limestone and other fillers to avoid local acidification caused by weak electric energy intervening in constructed wetlands, but these fillers do not help much in improving phosphorus and nitrogen removal in constructed wetlands

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