Treatment method for denitrogenation of waste water

Abstract

The invention discloses a handling method about microwave waste water denitrogenation, containing three steps of waster water preconditioning, microwave denitrogenation processing and gas collectiong. Waste water preconditioning is used to adjust and stabilize the water quality of waste water, adjusting waste water's pH value above 10; domestic sewage is not adjusted pH. Microwave denitrogenation can make the ammonia nitrogen in waste water escaped with form of ammonia gas at the action of microwave, reaching denitrogenation effect. Gas collectiong processing is collecting the alkaline air escaped in the microwave processing, avoiding air pollution. This method has the advantages of high ammonia nitrogen removement effect, short processing time, low operation cost, small equipment volume and high automation degree. This method is the same with the waste water containing high concentration ammonia nitrogen, such as coking waste water, garbage infiltration liquid, chemical fertilizers, agricultural chemicals waste water some pharmacy waste water and so on, also adapted for denitrification processing of domestic sewage.

Description

technical field [0001] The invention belongs to waste water treatment technology, in particular to a waste water denitrification treatment method. technical background [0002] Due to the development of industry and agriculture, the rapid increase of population and urbanization, a large amount of domestic sewage and industrial wastewater containing ammonia nitrogen are discharged into natural water bodies, resulting in eutrophication of water bodies, resulting in excessive algae reproduction and algal blooms. The state regards nitrogen and phosphorus pollution control as an important content of regional environmental pollution control in the medium and long-term scientific and technological development plan. In the treatment of some high-concentration ammonia nitrogen wastewater, such as coking wastewater and landfill leachate, it is still very difficult to discharge ammonia nitrogen up to the standard. Therefore, it is very important to develop efficient and economical was...

AI Technical Summary

Problems solved by technology

[0005] (1) The equipment used by the ammonia distillation method is huge, the amount of steam consumed is large, and the operating cost is high. Moreover, when the ammonia nitrogen concentration is not too high, such as less than 1000mg / L, this method is very uneconomical for treating wastewater

[0006] (2) Various A / O methods and improved biological treatment methods require long hydraulic retention time (about 30 hours), large reflux ratio, high investment and operating costs, and complicated operation control

[0007] (3) The A / O method requires that the wastewater has a relatively coordinated nutrient ratio. When the concentration of organic matter is very low, the A / O process requires an additional carbon source, which increases the processing load.

[0008] (4) When the wastewater is refractory and toxic organic wastewater, the normal growth of microorganisms is inhibited, the biochemical treatment is difficult, and the denitrification effect is correspondingly affected