Energy-saving process for treating high ammonia nitrogen waste water

Abstract

In the invention discloses an energy-saving treatment method of high strength ammonia wastewater, which comprises procedures of pre-processing, short-cut nitrification, micro-electrolysis and after-treatment. The method is characterized in that firstly wastewater is preprocessed to transform Kjeldahl nitrogen into amino nitrogen, then the wastewater enters a main body of the process to be processed. In a short-cut nitrification tank, the amino nitrogen in the wastewater is nitrated and controlled to a nitrite nitrogen stage, then a micro-electrolysis reactor is employed to replace anaerobic denitrification or ammonoxidation process to be denitrified, the nitrite nitrogen and organic pollutants in the wastewater are highly effectively degraded and are further subsequently processed by employing biological method and physicochemical oxidation method, and outlet water of the wastewater reaches standards. The method makes full use of water quality of raw water, the additional medicament consumption is saved, the process flow is shortened, and the process operation is simplified. Compared with the conventional denitrification process, the denitrification rate is increased, the total nitrogen removal rate reaches 60%-75%, and the treatment effect of degrading hardly degradable organics is remarkably increased. The treatment cost of wastewater per ton by employing novel method can be reduced by 30-50%.

Description

technical field [0001] The invention relates to a wastewater denitrification treatment method, in particular to an energy-saving and efficient treatment method for high-ammonia-nitrogen wastewater. Background technique [0002] There have been many literature reports on the research in the field of iron-carbon micro-electrolysis technology. However, these reports are mainly aimed at the degradation of refractory organic matter by micro-electrolysis, and micro-electrolysis is applied to the treatment process of nitrogen-containing wastewater as a means of denitrification, especially for denitrification pretreatment of high-ammonia nitrogen wastewater. It has not been reported in other periodicals and magazines. When the traditional process is used to treat high-ammonia-nitrogen wastewater, the ammonia-nitrogen pretreatment must be carried out first. The usual method is to add a large amount of alkali and hot steam to blow off the ammonia-nitrogen, which greatly increases the...

AI Technical Summary

Problems solved by technology

It solves the problems of low denitrification rate, difficult COD degradation, difficult effluent standard and high treatment cost in the treatment of high ammonia nitrogen wastewater

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