High organic nitrogen concentration wastewater treatment

Abstract

The invention relates to a high organic nitrogen concentration wastewater treatment. The high organic nitrogen concentration wastewater treatment comprises performing ozonation to remove and convert apart of organic nitrogen and organic matters, and through an ozone destruction tank, removing ozone residue in water to reduce damage of ozone to microorganisms; through anaerobic treatment, removingorganic nitrogen and organic matters in converted water and meanwhile performing denitrification reaction on nitrate nitrogen brought back by reflux to thoroughly eliminate nitrogen in the water; through a packing type MBR (membrane bioreactor) unit, thoroughly decomposing the organic matters, converting a major part of ammonia nitrogen through nitrification into nitrate nitrogen and nitrite nitrogen, performing ammonization reaction on a small part of the organic nitrogen, and meanwhile, forming an anaerobic environment inside packing biomembranes for denitrification reaction to further reduce ammonia in discharged water. The high organic nitrogen concentration wastewater treatment is practical and effective, can effectively remove nitrogen, COD (chemical oxygen demand) and the like in high organic nitrogen concentration wastewater and achieves up-to-standard discharge of the wastewater, thereby achieving high environmental benefits and a broad application prospect.

Description

technical field [0001] The invention relates to a treatment method for high organic nitrogen wastewater, more specifically a treatment process including three-step treatment units of ozone oxidation, anoxic and packed MBR, and provides a reliable method for the discharge of nitrogen in high organic nitrogen wastewater up to the standard Approach. Background technique [0002] At present, the artificially damaged nitrogen cycle has had a serious impact on human life. People have more and more stringent requirements on the control of nitrogen content in sewage. Nitrogen exists in many forms in water. According to the compound form, it can be divided into organic nitrogen, ammonia nitrogen and nitrate nitrogen. Among them, organic nitrogen is a main form of nitrogen in production and life, and it is difficult to remove it efficiently. [0003] The commonly used organic nitrogen removal methods are: biological treatment, chemical method and physical method. The ammonificatio...

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Problems solved by technology

In addition, some studies have tried to use algae and plant methods to remove organic nitrogen in water, but this method is limited to low-concentration organic nitrogen wastewater

There are also studies using chemical oxidation to remove organic nitrogen in water, and the removal rate of chemical oxidation can only reach about 50%; there are also studies using physical adsorption and physical sedimentation to remove organic nitrogen in water, but physical methods have not finally eliminated Nitrogen is converted to nitrogen gas, but still exists in the waste liquid or slag in the form of organic nitrogen or inorganic nitrogen

Each method has its one-sidedness, and it cannot treat organic nitrogen wastewater with a high concentration to meet the current discharge requirements for nitrogen.

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