Denitrogenation agent

Abstract

The invention discloses a denitrogenation agent. The denitrogenation agent is prepared from, by weight, 50-70 parts of main components, 20-40 parts of promoting components and 1-10 parts of auxiliary components. The main components are formed by mixing chlorite, hypochlorite and sym-closene salt according to the mass ratio of 1:1.5-2.5:1-5. The promoting components are formed by mixing manganese dioxide and ferric trichloride according to the mass ratio of 1:2-8, and the auxiliary components are soluble carbonate. The denitrogenation agent can effectively remove remaining ammonia and nitrogen in low-concentration ammonia and nitrogen wastewater, the removing efficiency is high, the using amount is small, raw materials of the denitrogenation agent are economical and easy to obtain, processing and preparing are easy, and cost is low.

Description

technical field [0001] The invention relates to a denitrification agent, which belongs to the field of sewage treatment. Background technique [0002] Ammonia nitrogen refers to the free ammonia (NH 3 ) and ammonium ions (NH 4 + ) in the form of nitrogen. The nitrogen content of animal organic matter is generally higher than that of vegetable organic matter. At the same time, nitrogen-containing organic matter in human and animal manure is very unstable and easily decomposed into ammonia. Therefore, the increased content of ammonia nitrogen in water refers to the combined ammonia in the form of ammonia or ammonium ions. Ammonia nitrogen is a nutrient in water, which can lead to eutrophication. It is the main oxygen-consuming pollutant in water and is poisonous to fish and some aquatic organisms. [0003] At present, the main methods for removing ammonia nitrogen are: physical method, chemical method and biological method. Physical methods include treatment technologie...

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Problems solved by technology

The treatment effect of the break point chlorination method in the actual treatment process cannot reach the theoretical treatment effect, and when the ammonia nitrogen concentration is reduced to a certain level, the ammonia nitrogen must be removed continuously, the dosage of the agent will be greatly increased, and the treatment cost will be greatly increased; The scope of application of the ion exchange method is limited, the requirements for the quality of the influent water are high, and the operation is complicated. The ammonia nitrogen content in the regenerated concentrated liquid is higher, the treatment is more difficult, and it is easy to cause secondary pollution; the ammonia stripping method is an effective treatment for high It is an effective method for ammonia nitrogen wastewater with high concentration, but after the current stripping technology removes ammonia nitrogen to a certain extent, it is difficult to continue to reduce the concentration of ammonia nitrogen, and it is always impossible to treat ammonia nitrogen up to the standard at one time; the biological treatment effect is higher, but the ammonia nitrogen in wastewater If the concentration is too high, it is not conducive to the conduct of biochemical treatment, and the stability of the biochemical system in actual operation is not high, often failing to meet the standards, and with the improvement of discharge standards, the effluent treated by biological treatment must reach new discharge The standard requires further expansion, and it is economically unbearable to carry out a large amount of civil construction and equipment matching for the removal of a small amount of ammonia nitrogen; while the chemical precipitation method (MAP) has a better removal effect on high-concentration ammonia nitrogen, when the ammonia nitrogen concentration When it drops to tens of milligrams per liter of water, it is difficult to continue to reduce the concentration of ammonia nitrogen in wastewater by adding chemicals

[0005] In summary, with the above-mentioned treatment technologies and methods, as the country increases the discharge limit of ammonia nitrogen concentration from 15mg / L to 8mg / L, the residual ammonia nitrogen value after these methods effectively treat ammonia nitrogen wastewater to a certain extent is often still higher than discharge requirements, and the concentration of residual ammonia nitrogen in this part is often small, it is not economically feasible to increase investment in the construction of advanced treatment processes for this part of residual ammonia nitrogen; in addition, many industrial wastewaters use physical and chemical methods to remove ammonia nitrogen. It may also be used for subsequent biochemical treatment, but this part of the residual ammonia nitrogen cannot be discharged directly, so it is necessary to develop a treatment agent that can quickly remove a small amount of residual ammonia nitrogen, and use the original treatment structure to efficiently carry out the deep treatment of ammonia nitrogen

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