Method for preparing composite ammonia nitrogen remover and application thereof

Abstract

The present invention provides a preparation method for remover for compound ammonia nitrogen, which is developed aiming at the defects of utilizing the biological method and the aeration stripping method to apply the treatment to the ammonia nitrogen in the sewage that the technological process is long and the removal rate is not high. The preparation method for remover for compound ammonia nitrogen comprises the following steps: first the mixture of the phosphates and the magnesium salts is remixed; wherein the mixing is carried out following the molar ratio ranging from 1.0:1.0 to 1.3:1.0 according to Mg2+:PO42- and the mixture is mixed with the water in a mass ratio of 1:9 so as to be dissolved into the solution, and then the solution containing ferrous acids which the acidity (calculated according to the content of HCl) ranges from 10% to 50%, the content of Fe3+ ranges from 0.05% to 5% and the content of Fe2+ ranges from 8% to 8% in is added in the solution and the homogeneous solution is obtained under the sufficient stirring. A liquid ammonia nitrogen treatment agent prepared according to the present invention has simple manufacturing technique, is beneficial to the transportation and adding, has very strong ability of removing the ammonia nitrogen, is suitable for removing the ammonia nitrogen in the industrial sewage and domestic sewage of various industries, in particular the printing and dyeing, chemical engineering, paper making industries, etc and simultaneously has the auxiliary effect of removing the phosphorus ions in the sewage and lower COD.

Description

technical field [0001] The invention relates to the field of ammonia nitrogen removal in water treatment, in particular to the composite technology of phosphate and magnesium salt, and the composite preparation and application of ferric acid. Background technique [0002] Excessive discharge of ammonia nitrogen in production and life into the water body leads to eutrophication of the water body, reducing the ornamental value of the water body, and the oxidation of ammonia nitrogen to nitrate and nitrite will also affect the health of aquatic organisms and humans. Therefore, wastewater denitrification treatment has received widespread attention. At present, the main denitrification methods include biological nitrification and denitrification, break point chlorination, gas stripping and ion exchange. Digested sludge dehydration fluid, landfill leachate, wastewater from catalyst production plants, meat processing plants, and synthetic ammonia chemical wastewater all have ammon...

AI Technical Summary

Problems solved by technology

[0010] The present invention is designed and developed for the problems of high cost and inconvenient post-treatment operation of the existing physicochemical ammonia nitrogen treatment technology under the condition that the existing new ammonia nitrogen treatment technology is immature.