Organic denitrifier and denitrification method for processing high concentration ammonia-nitrogen waste water

Abstract

The invention discloses an organic denitrifier for treating high concentration ammonia nitrogen wastewater and a denitrogenation method thereof; the organic denitrifier consists of 50%-80% of organic esters, 10%-50% of amines and 10%-50% of alkanes. 10-20ppm of the organic denitrifier is added into the high concentration ammonia nitrogen wastewater according to the proportion, and pH of the wastewater is adjusted with in the range of 9.0-10.4, then aeration is carried out for two hours; The organic denitrifier is only added into wastewater, ether in aeration tank or in aeration tower; the invention can be applied for eliminating high concentration inorganic ammonia nitrogen and organic nitrogen, especially for eliminating high concentration inorganic ammonia nitrogen. The concentration of the ammonia nitrogen wastewater can be reduced from 30000mg / L to below 0.5mg / L. The eliminating rate can reach 99.999%; and the required quantity of the denitrifier is small, the denitrogenation method can be applied simply.

Description

technical field [0001] The invention relates to the treatment of high-concentration ammonia-nitrogen wastewater discharged in the production processes of pharmacy, chemical industry, coking and oil refining, etc., and is also applicable to the treatment of high-concentration organic nitrogen. Background technique [0002] At present, the denitrification technologies used in the treatment of ammonia nitrogen wastewater at home and abroad mainly include biochemical method, stripping method, air stripping method, boiling ion exchange method and break point chlorination method and other methods and processes; The concentration is low, and generally cannot exceed 200mg / L. When the ammonia nitrogen is higher than 200-300mg / L, it will inhibit the growth and reproduction of bacteria. Therefore, this process is only suitable for low-concentration ammonia nitrogen wastewater with an ammonia nitrogen content of about 200mg / L. In addition, the biochemical treatment process project occu...

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Problems solved by technology

For example: the announcement number is CN1782025A, and the name is "a liquid organic denitrification agent and denitrification method that does not require separation of nitrogen slag." The denitrification agent described in the patent is mainly used in the separation of heavy distillate oil in petroleum refining. The principle of complexation of liquid organic matter under acidic conditions is used to remove basic nitrogen compounds in heavy distillate oil; the denitrification agent described in the patent with the announcement number CN1778707A and the name "Method for the Treatment of High Concentration Ammonia Nitrogen Wastewater" is also used in high concentration ammonia nitrogen Wastewater treatment, but it uses acidic and heated conditions to oxidize ammonia nitrogen, and its removal efficiency is also 70% for wastewater with ammonia nitrogen concentration below 10000mg / L, which can only be used as a pretreatment for high concentration ammonia nitrogen wastewater Treatment method; the patent of "a high-concentration ammonia nitrogen wastewater treatment method" described in CN1367147A is suitable for wastewater with an ammonia nitrogen concentration below 6000 mg / L. Aeration is carried out under alkaline conditions, and the amount of alkali is added twice. Then coagulate with flocculant, and then reach the standard after being filtered by the filter tank. This denitrification method is complicated in process and is not conducive to industrial promotion.