A process of reinforcing the denitrification efficiency of an anaerobic ammoxidation reactor by utilizing a spongy iron filler

A technology of anaerobic ammonium oxidation and sponge iron, applied in the direction of anaerobic digestion treatment, chemical instruments and methods, water pollutants, etc., to achieve the effect of simple operation process, full degradation, and promotion of bacterial growth

Inactive Publication Date: 2017-06-20
NORTHEAST DIANLI UNIVERSITY
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Problems solved by technology

As an anaerobic process, very low concentrations of DO lead to irreversible inhibition of its activity

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  • A process of reinforcing the denitrification efficiency of an anaerobic ammoxidation reactor by utilizing a spongy iron filler
  • A process of reinforcing the denitrification efficiency of an anaerobic ammoxidation reactor by utilizing a spongy iron filler
  • A process of reinforcing the denitrification efficiency of an anaerobic ammoxidation reactor by utilizing a spongy iron filler

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[0014] The process for strengthening the denitrification efficiency of anaerobic ammonium oxidation reactor with sponge iron filler of the present invention includes the following: the filler added to the anaerobic ammonium oxidation reactor is sponge iron with a particle size of 0.1-8mm and 30g-100g / L , improve the efficiency of anaerobic ammonium oxidation denitrification; sponge iron removes dissolved oxygen or / and oxidative substances brought in raw water through reduction, and is conducive to the conversion and removal of ammonia nitrogen, nitrite nitrogen and nitrate nitrogen, eliminating The inhibitory effect of dissolved oxygen and oxidizing substances on anammox bacteria; the divalent ferrous ions and ferric ions dissolved from the sponge iron can be used as trace elements to supply microorganisms to promote the physiological and biochemical reactions of microorganisms. The growth of ammonia oxidizing bacteria provides the necessary conditions, and at the same time, th...

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Abstract

A process of reinforcing the denitrification efficiency of an anaerobic ammoxidation reactor by utilizing a spongy iron filler is provided. The process is characterized in that spongy iron is added into the reactor to increase the anaerobic ammoxidation denitrification efficiency. Through reduction, the spongy iron can remove dissolved oxygen or other oxidizing compounds possibly brought by raw water, and can eliminate inhibiting functions of the dissolved oxygen and the oxidizing compounds on anaerobic ammonium oxidation bacteria. The spongy iron plays a role on conversion and removal among ammonia nitrogen, nitrate nitrogen and nitrite nitrogen, thus reducing the total nitrogen in discharged water. Divalent ferrous ions and ferric ions which are dissolved out through a reaction from the spongy iron can be adopted as trace elements and supplied to microorganisms to promote physiological and biochemical reactions of the microorganisms, and generated ferric hydroxide floc can be adopted as a flocculating agent to promote formation of anaerobic granular sludge, thus reinforcing ammoxidation and increasing the removing rate of the total nitrogen. The process can be used for denitrification of domestic wastewater and can be used for denitrification of various types of nitrogen-containing industrial wastewater.

Description

technical field [0001] The invention relates to the technical field of sewage and wastewater treatment, and relates to a technique for enhancing the denitrification performance of an anaerobic ammonium oxidation reactor with a sponge iron filler. Background technique [0002] Nitrogen is an important nutrient element and one of the main constituent substances of life. The valence state of nitrogen in nature is mainly NH 3 (-Ⅲ), N 2 (0), NO 3 - (+Ⅴ), NO 2 - (+Ⅲ), NO (+Ⅱ), N 2 O(+I) etc. Under the action of physics, chemistry and biology, the naturally occurring nitrogen transforms among these forms, forming a closed cycle, called the nitrogen cycle. However, with the beginning of the human industrial revolution, this balance was gradually broken, resulting in serious nitrogen pollution. Ammonia nitrogen, nitrite nitrogen and nitrate nitrogen are the main forms of nitrogen in water bodies. Various forms of nitrogen-containing compounds will cause serious nitrogen pol...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28C02F101/16
Inventor 杨世东陶文鑫姚丽强
Owner NORTHEAST DIANLI UNIVERSITY
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