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Shortcut nitrification-anaerobic ammonia oxidation technology for efficiently treating low-carbon and high-ammonia-nitrogen wastewater

An anaerobic ammonia oxidation and short-range nitrification technology, which is applied in the field of sewage treatment, can solve the problems of low carbon and high ammonia nitrogen wastewater and other problems, and achieve the effects of low treatment cost, complete denitrification and controllable process.

Active Publication Date: 2020-01-24
NANJING HIGH TECH UNIV BIOLOGICAL TECH RES INST CO LTD +1
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a short-range nitrification-anammox process for efficiently treating low-carbon and high-ammonia-nitrogen wastewater in order to solve the problem of low-carbon and high-ammonia-nitrogen wastewater treated by existing biological technologies. The problem

Method used

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  • Shortcut nitrification-anaerobic ammonia oxidation technology for efficiently treating low-carbon and high-ammonia-nitrogen wastewater
  • Shortcut nitrification-anaerobic ammonia oxidation technology for efficiently treating low-carbon and high-ammonia-nitrogen wastewater
  • Shortcut nitrification-anaerobic ammonia oxidation technology for efficiently treating low-carbon and high-ammonia-nitrogen wastewater

Examples

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Effect test

Embodiment 1

[0040] like figure 1 As shown, it is a schematic flow chart of the sewage treatment process for treating low-carbon high-ammonia-nitrogen wastewater in this embodiment. First, the low-carbon and high-ammonia-nitrogen wastewater enters the anammox zone for anammox, and then enters the short-cut nitrification zone 1-4 in turn through the overflow method. A part of the ammonia nitrogen in the wastewater will be converted into nitrite nitrogen in the facultative zone because of the short-cut nitrification The conditions of zones 1-4 are different, and the nitrite nitrogen in the short-range nitrification zone 4 will be higher, which is harmful to the microorganisms in the water body. Therefore, part of the short-range nitrification zone 4 is returned to the short-range nitrification zone 1, and the other part of the wastewater is returned to the anammox. Zone re-reacts until the ratio of nitrite nitrogen to ammonia nitrogen in the short-range nitrification zone 4 is roughly 1.0, a...

Embodiment 2

[0050] The treatment device is the same as in Example 1, wherein the packing density in the anaerobic ammonium oxidation zone is 0.985g / cm 3 , the filling rate is 30%; the packing density of each short-range nitrification zone is 0.978g / cm 3 , the filling rate is 20%; the packing density in the nitrification zone is 0.97g / cm 3 , fill rate 30%. Control the dissolved oxygen concentration in the anaerobic ammonium oxidation zone to 0.1mg / L, the dissolved oxygen concentration in the short-cut nitrification zone 1 to 0.3mg / L, the dissolved oxygen concentration in the short-cut nitrification zone 2 to 0.5mg / L, and the dissolved oxygen concentration in the short-cut nitrification zone 3 The dissolved oxygen concentration in the short-cut nitrification zone 4 is 1.0mg / L, and the dissolved oxygen concentration in the nitrification zone is 3.0mg / L.

[0051] The anaerobic ammonium oxidation zone, each short-range nitrification zone, and the nitrification zone are inoculated with activa...

Embodiment 3

[0058] The treatment device is the same as in Example 1, wherein the packing density in the anaerobic ammonium oxidation zone is 0.99g / cm 3 , the filling rate is 30%; the packing density of each short-range nitrification zone is 0.98g / cm 3 , the filling rate is 20%; the packing density in the nitrification zone is 0.99g / cm 3 , fill rate 30%. Control the dissolved oxygen concentration in the anammox zone to 0.01mg / L, the dissolved oxygen concentration in the short-cut nitrification zone 1 to 0.3mg / L, the dissolved oxygen concentration in the short-cut nitrification zone 2 to 0.4mg / L, and the dissolved oxygen concentration in the short-cut nitrification zone 3 The dissolved oxygen concentration in the short-cut nitrification zone 4 is 0.7mg / L, and the dissolved oxygen concentration in the nitrification zone is 2mg / L.

[0059] The anaerobic ammonium oxidation zone, each short-range nitrification zone, and the nitrification zone are inoculated with activated sludge, and the slud...

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Abstract

The invention discloses a shortcut nitrification-anaerobic ammonia oxidation technology for efficiently treating low-carbon and high-ammonia-nitrogen wastewater. The technology comprises the followingsteps: the low-carbon and high-ammonia-nitrogen wastewater to be treated is introduced into an anaerobic ammonia oxidation zone and undergoes an anaerobic ammonia oxidation reaction, the reaction effluent sequentially enters a group of at least three shortcut nitrification zones, which are connected in sequence, in an overflow mode, and undergoes short-cut nitrification reaction, one part of reaction wastewater in the last shortcut nitrification zone flows back to the anaerobic ammonia oxidation zone, and reacts again, and the remaining water flows back to the first shortcut nitrification zone, and reacts again until a mass / concentration ratio of nitrous acid nitrogen to ammonia nitrogen in the reaction wastewater in the last shortcut nitrification zone is 1.0-1.5, and finally the wastewater reaching reaction standards enters a nitrification zone in an overflow mode, and undergoes further carbon and nitrogen removal. When the efficient denitrification technology is used for treating the low-carbon and high-ammonia-nitrogen wastewater, the carbon-nitrogen ratio of the wastewater is less than 2, a carbon source does not need to be added, the aeration demand is extremely low, the treatment cost is extremely low, and the sewage treatment cost of enterprises can be greatly reduced.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and in particular relates to a short-range nitrification-anammox process for efficiently treating low-carbon, high-ammonia-nitrogen wastewater. Background technique [0002] With the development of social economy, the types of wastewater are increasing day by day, and the impact on the environment is becoming more and more serious. Among them, there is a type of wastewater with low COD but high ammonia nitrogen content, and general processes cannot treat this type of wastewater at low cost. If it is directly discharged, it will cause eutrophication of the water body and excessive growth of algae, which not only reduces the ornamental value of the water body, but also causes the death of aquatic organisms due to hypoxia. Some algae protein toxins can also poison people through the food chain, seriously endangering human and biological survival. Therefore, how to economically and effectively treat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30C02F101/38
CPCC02F3/302C02F2101/38C02F2305/06
Inventor 佟毅应汉杰刘桂文朱杰陈勇李义李凡孙振江王大伟
Owner NANJING HIGH TECH UNIV BIOLOGICAL TECH RES INST CO LTD
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