High-ammonia-nitrogen wastewater treatment method

Abstract

A high-ammonia-nitrogen wastewater treatment method adopts a mechanical grating groove, an oil separation tank, a regulating reservoir, a carbon source tank, efficient combined floatation, a CASS (Commanded Active Sonobuoy System) reactor, a Roots blower, a CASS reflux pump, a middle pond, an MBBR (Moving Bed Biofilm Reactor) contact oxidation pond, a secondary sedimentation tank, an alkali tank, a monitoring pool, an accident pool, a silt pool and a silt filter system. The high-ammonia-nitrogen wastewater treatment method adopts on-line pH (Potential of Hydrogen), COD (chemical oxygen demand), NH3-N (ammonia nitrogen),, MLSS (Mixed Liquor Suspended Solids), DO (Dissolved Oxygen) and ORP (Oxidation Reduction Potential) monitors and a liquid indicator as supplements. The treatment method mainly aims at pollutants including organics of NH3-N, TN, COD (BOD5) (Biochemical Oxygen Demand 5), SS (suspended solids) and oil type pollutants. The pretreatment on the oil type pollutants and the SS is conducted in a way of oil separation and floatation. The principle of removing the NH3-N by a biochemical method is that nitration and denitrification are conducted through a two-stage biochemical treatment process, the ammonia nitrogen is converted to nitrite nitrogen and nitrate nitrogen by the nitration, then a carbon source is supplied to conduct the denitrification so as to convert the nitrate nitrogen to nitrogen, and therefore, denitrification in a true sense is achieved. The high-ammonia-nitrogen wastewater treatment method can be applied to treatment of industrial wastewater containing methyl alcohol, synthesis ammonia, urea, ammonium nitrate, carbonic acid hydrogenous amine and the like.

Description

technical field [0001] The invention relates to a method for treating waste water, in particular to a method for treating high ammonia nitrogen waste water. Background technique [0002] The existing popular treatment method is to set up regulating pool + anoxic pool + aerobic pool (biological filter / contact oxidation) + monitoring pool to treat high ammonia nitrogen wastewater. Its disadvantages are as follows: first, the process of treating high ammonia nitrogen wastewater is immature, not resistant to impact load, operation control is difficult, and it is difficult to achieve the purpose of treatment; second, the wastewater contains a certain concentration of petroleum, which will affect the subsequent treatment without pretreatment. The treatment process has a fatal impact; third, the nitrification and denitrification effects of this method are not ideal, especially the low removal rate of TN. Contents of the invention [0003] The purpose of the present invention i...

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Problems solved by technology

Its disadvantages are as follows: first, the process of treating high ammonia nitrogen wastewater is immature, not resistant to impact load, operation control is difficult, and it is difficult to achieve the purpose of treatment; second, the wastewater contains a certain concentration of petroleum, which will affect the subsequent treatment without pretreatment. The treatment process has a fatal impact; third, the nitrification and denitrification effects of this method are not ideal, especially the low removal rate of TN

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