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Culture method of anaerobic ammonia oxidation granular sludge with blue iron ore core

An anaerobic ammonia oxidation and granular sludge technology, applied in chemical instruments and methods, water/sludge/sewage treatment, aerobic and anaerobic process treatment, etc., can solve the problem of poor settling performance, easy sludge loss, nitric acid Salt by-products affect the process compliance discharge and other problems, to achieve the effect of strengthening denitrification, increasing affinity, and improving total nitrogen removal rate

Active Publication Date: 2021-10-12
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the defects in the prior art that the anaerobic ammonium oxidation granular sludge has poor settling performance, the sludge is easy to lose, and the production of nitrate by-products affects the discharge of the process, thereby providing a blue Cultivation method of anaerobic ammonium oxidation granular sludge in iron ore core

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  • Culture method of anaerobic ammonia oxidation granular sludge with blue iron ore core
  • Culture method of anaerobic ammonia oxidation granular sludge with blue iron ore core
  • Culture method of anaerobic ammonia oxidation granular sludge with blue iron ore core

Examples

Experimental program
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Effect test

Embodiment 1

[0056] The present embodiment provides a method for cultivating anaerobic ammonium oxidation granular sludge with a blue iron core, and the specific steps are as follows:

[0057] Take an upflow anaerobic sludge bed reactor with an effective volume of 2.5L, the structure is as follows figure 1 As shown, add 180g·L in the reactor main body 6 -1 Granular activated carbon was used as a biological carrier, inoculated with anaerobic ammonium oxidation granular sludge, and the suspended solids concentration of the mixed liquid of anaerobic ammonium oxidation granular sludge was 2g L -1 , using simulated wastewater as influent, the reactor operates under the conditions of anaerobic, dark, temperature 35±1°C, hydraulic retention time 5.4h, and the reactor main body 6 is heated by water bath heating 4 .

[0058] The composition of the simulated wastewater is: ammonia nitrogen 50-210mg L -1 , Nitrite nitrogen 50-210mg·L -1 , phosphate 8-44mg·L -1 , KHCO 3 125mg·L -1 ,EDTA 5mg·L ...

Embodiment 2

[0068] The present embodiment provides a method for cultivating anaerobic ammonium oxidation granular sludge with a blue iron core, and the specific steps are as follows:

[0069] Take an upflow anaerobic sludge bed reactor with an effective volume of 2.5L, and inoculate the anammox granular sludge in the reactor main body 6, and the suspended solid concentration of the mixed liquid of the anammox granular sludge is 2g L -1 , using simulated wastewater as influent, the reactor operates under the conditions of anaerobic, dark, temperature 35±1°C, hydraulic retention time 5.4h, and the reactor main body 6 is heated by water bath heating 4 .

[0070] The composition of the simulated wastewater is: ammonia nitrogen 50-230mg L -1 , Nitrite nitrogen 50-230mg·L -1 , phosphate 6-49mg·L -1 , KHCO 3 125mg·L -1 ,EDTA 5mg·L -1 and trace elements Ⅰ 2mL·L -1 , Trace element II 1mL·L -1 , the solvent is water, wherein the composition of trace elements is the same as in Example 1.

...

experiment example

[0087] The granular sludge obtained in the embodiment of the present invention and the comparative example is tested for performance, including sedimentation performance, mechanical strength, particle size, bacterial load density, etc. The specific test methods and test results are as follows:

[0088] 1. Settling performance: The settling performance index of sludge is characterized by sludge volume index (SVI). Firstly, the concentration of mixed liquid suspended solids (MLSS) is measured by the standard gravimetric method, that is, a certain volume of complete muddy water mixture is dried at 105°C to constant weight, and the weighing value is divided by the volume of the mixed liquid to obtain MLSS, and then settle for 30 minutes The sludge sedimentation ratio (SV) was measured by the method, that is, the volume of the activated sludge after settling in a 1000 ml measuring cylinder for 30 minutes was SV30. The SVI value is the ratio of SV30 to MLSS.

[0089] 2. Mechanical ...

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Abstract

The invention belongs to the technical field of sewage treatment, and particularly relates to a culture method of anaerobic ammonia oxidation granular sludge with a blue iron ore core. According to the method, the characteristics of an anaerobic ammonium oxidation system are fully utilized, on one hand, anaerobic ammonium oxidation bacteria can enhance in-situ oxidation of zero-valent iron, increase the affinity of Fe < 2 + > and PO4 < 3->, promote nucleation and enhance nitrogen removal through the characteristic that the anaerobic ammonium oxidation bacteria can generate nitrate; on the other hand, the characteristic that the anaerobic ammonium oxidation bacteria secrete more extracellular polymeric substances than common bacteria is fully utilized, more ions can be adsorbed on cell walls, local supersaturation can be achieved more quickly, and nucleation is promoted. According to the method disclosed by the invention, by adjusting pH values in different stages and the concentration of phosphate radicals in inflow water, Fe < 2 + > generated by reducing nitrate with zero-valent iron in situ has stronger phosphate affinity than that generated by directly adding ferric salt, and an extracellular polymeric substance of anaerobic ammonia oxidizing bacteria has stronger adsorption characteristic on Fe < 2 + >, so that the formation of the blue iron ore core is ensured, the problems of nitrate by-product accumulation and sludge floating are effectively improved.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a method for cultivating anaerobic ammonium oxidation granular sludge with a cyanite core. Background technique [0002] Nitrogen and phosphorus are the basic elements of all life forms and are indispensable and important components of plants and animals. With the rapid improvement of the national economic level, excessive nitrogen and phosphorus discharges cause eutrophication of water bodies, seriously affecting the sustainable development of social economy. Therefore, before the sewage is discharged into the receiving water body, it is necessary to effectively remove the nitrogen and phosphorus elements in the sewage, control the concentration of the sewage discharged into the water body, and reduce the risk of water pollution and eutrophication. In recent years, the anaerobic ammonium oxidation process has developed rapidly as an effective biological den...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30C02F101/16
CPCC02F3/307C02F3/308C02F1/66C02F2209/06C02F2101/166C02F2101/16
Inventor 张莉王月萍郝仕伟孙清轩蓝爽豆全浩
Owner BEIJING UNIV OF TECH
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