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Method for cultivating anaerobic ammonium oxidation granular sludge

A technology of anaerobic ammonium oxidation and granular sludge, which is applied in anaerobic digestion treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the problems of low reactor volume load, single bacterial group structure, poor operation, etc. Stability and other issues, to achieve the effect of improving treatment efficiency, increasing biomass, and improving operation stability

Active Publication Date: 2010-09-15
江苏清材智能制造有限公司
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AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of low reactor volume load and low removal rate caused by low sludge concentration in the existing anaerobic ammonium oxidation reactor, as well as unstable operation caused by a single bacterial group structure, and provides a A kind of cultivation method of anaerobic ammonium oxidation granular sludge

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The anaerobic methanogenic granular sludge in an IC reactor for papermaking wastewater and the aerobic nitrification granular sludge in an airlift nitrification reactor for ammoniacal wastewater (ammonia nitrogen concentration 700mg / L) were mixed at a ratio of 1:1 The mass ratio is mixed evenly. Then the mixed granular sludge was inoculated into the upflow anaerobic reactor. The total volume of the reactor was 6.0L, and the volume of the reaction zone was 3.6L. The sedimentation zone was equipped with a three-phase separator. After inoculation, the sludge in the reactor was The sludge concentration was 23.2g SS / L. The concentration of ammonia nitrogen in the simulated wastewater is 200mg / L, the ratio of ammonia nitrogen to nitrite nitrogen is 1, and KHCO is added to the above wastewater 3 (0.05g / L, calculated as C), KH 2 PO 4 (0.006g / L, calculated as P), trace elements Fe 1.8mg / L, B 0.002mg / L, Mn 0.28mg / L, Cu 0.06mg / L, Co 0.10mg / L, Zn 0.10mg / L, Ni 0.05mg / L, Mo 0.10m...

Embodiment 2

[0025] The anaerobic methanogenic granular sludge in a UASB reactor for treating starch wastewater and the denitrification granular sludge in an upflow reactor for treating nitrate-containing wastewater (nitrate nitrogen concentration 280mg / L) were used in a ratio of 1:2 well mixed. The rest of the operation process is the same as that of Example 1, and after about 150 days of continuous cultivation, anaerobic ammonium oxidation granular sludge appears in the reactor.

Embodiment 3

[0027] The anaerobic methanogenic granular sludge in a UASB reactor for starch wastewater treatment, the aerobic nitrification granular sludge in an air-lift nitrification reactor for ammoniacal wastewater (ammonia nitrogen concentration 700mg / L), and the The denitrification granular sludge in the upflow reactor of the nitrate (nitrate nitrogen concentration: 280mg / L) wastewater is mixed evenly in the ratio of 1:0.5:2. The rest of the operation process is the same as that of Example 1, and after about 140 days of continuous cultivation, anaerobic ammonium oxidation granular sludge appears in the reactor. Continue to operate for 75 days, the total nitrogen removal rate of the reactor volume can be as high as 12.3kg / (m 3 .d).

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Abstract

The invention provides a method for cultivating anaerobic ammonium oxidation granular sludge. The method comprises the steps of: mixing and putting two or three kinds of anaerobic methanogenic granular sludge, nitrification aerobic granular sludge and hypoxia denitrification granular sludge into an upflow anaerobic reactor; pumping simulate waste water containing ammonia nitrogen and nitrite nitrogen to start; keeping the temperature of 25 to 35 DEG C in the reactor and the pH value of 7.5 to 8.0 without dissolved oxygen, and keeping hydraulic detention time of 8 to 24 hours; and stabilizing for a period of time to obtain the anaerobic ammonium oxidation granular sludge from the reactor. The invention has the advantages of having good hydraulic performance and microbial activity of the anaerobic ammonium oxidation granular sludge cultivated by the method, and greatly improving the operation effectiveness and the operation stability of the reactor.

Description

(1) Technical field [0001] The invention relates to a method for cultivating anaerobic ammonium oxidation granular sludge, belonging to the technical field of wastewater biological treatment. (2) Background technology [0002] According to the Bulletin on the State of the Environment in China, my country's ammonia nitrogen emissions reached 1.498 million tons in 2005, an increase of 12.6% over the previous year. Exceeding the standard of ammonia nitrogen in surface waters across the country is common, and eutrophication is very serious, leading to frequent occurrence of algal blooms in lakes and bays. The control of nitrogen pollution has become a major environmental protection issue that needs to be solved urgently. [0003] Under anaerobic conditions, the process of using anammox bacteria to convert nitrite and ammonia into nitrogen is called anammox. Anaerobic ammonium oxidation process is a new type of biological denitrification process favored by people. This process ...

Claims

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Application Information

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IPC IPC(8): C02F3/28C02F101/16
CPCY02E50/30
Inventor 金仁村马春阳广凤姬玉欣
Owner 江苏清材智能制造有限公司
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