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Method for activating anaerobic ammonia oxidation sludge under low-temperature condition by using ultrasonic waves

A technology of anaerobic ammonia oxidation and low temperature conditions, applied in anaerobic digestion treatment and other directions, can solve the problems of high technical requirements, complex operation process, long onset time, etc., to achieve simple operation method, easy parameter control, quick effect. Effect

Inactive Publication Date: 2014-10-08
HANGZHOU NORMAL UNIVERSITY
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Problems solved by technology

Although these technologies can improve the denitrification performance of anammox bacteria to a certain extent, there are certain disadvantages in these methods, such as long onset time, complicated operation process, and high technical requirements for operation.

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  • Method for activating anaerobic ammonia oxidation sludge under low-temperature condition by using ultrasonic waves

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Experimental program
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Embodiment 1

[0017] step:

[0018] 1) The operating status of the reactor before sludge activation

[0019] The two sets of UASB reactors have the same configuration and an effective volume of 1.0L. The inoculated sludge is anaerobic ammonium oxidation granular sludge matured in the laboratory, and the VSS (volatile suspended solids) of the inoculated sludge is 8.20g L -1 , placed in the laboratory (without temperature control facility) at the same time, real-time record the temperature change in the reactor, control the influent pH value to 8.0±0.5, divide the reactor into two groups: test group (R U ) and the control group (R C ), to treat nitrogen-containing wastewater.

[0020] The composition of nitrogen-containing simulated wastewater is: (NH 4 ) 2 SO 4 210mgL -1 , NaNO 2 210mgL -1 , KH 2 PO 4 10mgL -1 , CaCl 2 2H 2 O5.6mgL -1 , MgSO 4 ·7H 2 O300mgL -1 ,KHCO 3 1250mgL -1 , 1.25ml each of trace element concentrate solution Ⅰ and Ⅱ -1 . Among them, the composition ...

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Abstract

The invention provides a method for activating anaerobic ammonia oxidation sludge under a low-temperature condition by using ultrasonic waves. The low-temperature condition indicates that the running temperature of an anaerobic ammonia oxidation reactor is below 30 DEG C. The method comprises the following steps: adding the anaerobic ammonia oxidation sludge to be activated into a reaction container, and performing water bath ultrasonic treatment, wherein the water bath temperature is 31-35 DEG C, and the ultrasonic conditions are that the frequency is 20 kHz, the intensity is 0.7-0.9w / cm<2>, and the time is 1.7-2.0 minutes; and after the ultrasonic treatment, obtaining the activated anaerobic ammonia oxidation sludge. By adopting the method for applying ultrasonic waves to the anaerobic ammonia oxidation sludge, the denitrification performance of anaerobic ammonium oxidation bacteria with poor denitrification performance at the low-temperature condition can be improved; and as proved by testing, the method has the advantages of easiness in operation, quick response, wide application range and the like.

Description

technical field [0001] The invention relates to a method for activating anaerobic ammonium oxidation sludge under low temperature conditions by using ultrasonic waves. Background technique [0002] Anaerobic ammonium oxidation is a new biological denitrification process, which can oxidize ammonia nitrogen to nitrogen gas under anaerobic conditions using nitrite as an electron acceptor, and realize the simultaneous removal of two nitrogen pollutants. Compared with traditional biological The denitrification process, anaerobic ammonium oxidation, has the advantages of good denitrification effect, low energy consumption, no need to add organic carbon source, low operating cost, etc., and has broad prospects for industrial application. However, anammox bacteria are sensitive to environmental conditions, and the optimum temperature is 30-35°C. If the temperature is too low, its denitrification performance will decrease. However, due to seasonal changes or differences in geographi...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28
Inventor 金仁村郭琼俞津津陈辉姬玉欣张正哲王慧中
Owner HANGZHOU NORMAL UNIVERSITY