A method for cultivating anaerobic ammonium oxidation granular sludge resistant to low doses of fulvic acid

An anammox and granular sludge technology, applied in anaerobic digestion treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the problem of anammox bacterial activity reduction and unstable denitrification performance and other problems, to achieve the effect of saving the amount of inoculum, resisting the impact of unfavorable conditions, and having a large particle size

Active Publication Date: 2022-03-22
BEIJING UNIV OF TECH
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Problems solved by technology

Therefore, when the anammox process is used to denitrify wastewater containing fulvic acid, the activity of anammox bacteria may decrease, resulting in unstable denitrification performance.

Method used

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  • A method for cultivating anaerobic ammonium oxidation granular sludge resistant to low doses of fulvic acid
  • A method for cultivating anaerobic ammonium oxidation granular sludge resistant to low doses of fulvic acid

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Embodiment 1

[0023] Take an upflow anaerobic sludge bed reactor with an effective volume of 2.5 L (such as figure 1 ), add 180g·L -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 , with simulated wastewater as influent, the reactor operates under the conditions of anaerobic, dark, temperature of 35±1°C, influent PH of 7.5±0.1, and hydraulic retention time of 4.9h. The composition of simulated wastewater is: ammonia nitrogen 50~200mg·L -1 , nitrite nitrogen 50~200mg·L -1 , KHCO 3 125mg·L-1 ,KH 2 PO 4 54mg·L -1 ,FeSO 4 ·7H 2 O 9mg·L -1 ,EDTA5mg·L -1 and trace elements Ⅰ 2mL·L -1 , Trace element II 1mL·L -1 , the solvent is water.

[0024] The trace element I composition: NaCl 500mg·L -1 ,KCl 700mg·L -1 ,CaCl 2 2H 2 O 700mg·L -1 ,MgSO 4 ·7H 2 O 500mg·L -1 .

[0025] The trace e...

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Abstract

The invention provides a cultivation method for fulvic acid anaerobic granular sludge resistant to low doses: using an upflow anaerobic sludge bed reactor, using anammox granular sludge as inoculated sludge, adding granular Activated carbon is used as the internal filler, and the simulated wastewater is used as the influent. After a period of enrichment and cultivation, fulvic acid is added to the reactor for low-dose fulvic acid-resistant cultivation. By gradually increasing the concentration of fulvic acid in the early stage, and then through appropriate The recovery period of the denitrification performance and the mode of rapidly increasing the concentration of fulvic acid in the later stage complete the cultivation of anammox granular sludge that tolerates low doses of fulvic acid; the method of the present invention can utilize a small amount of inoculated anammox granular sludge The quick start of the anaerobic ammonium oxidation process is realized, and the cultivated anaerobic ammonium oxidation granular sludge has a good ability to tolerate fulvic acid, and the granular sludge has excellent properties and high activity.

Description

technical field [0001] The invention relates to a method for cultivating anaerobic ammonium oxidation granular sludge, in particular to a method for cultivating anaerobic ammonium oxidation granular sludge tolerant to low doses of fulvic acid. Background technique [0002] The anaerobic ammonium oxidation process is a green, efficient and promising new biological denitrification process. Under anaerobic conditions, nitrite is used as an electron acceptor to directly oxidize ammonia nitrogen into nitrogen. Compared with the traditional biological denitrification process, the anaerobic ammonia oxidation process can reduce 60% of the aeration rate, 100% of the organic carbon source and 90% of the sludge volume. Problems such as difficult denitrification of wastewater and high energy consumption have brought dawn. However, anammox bacteria are autotrophic bacteria with slow proliferation and are extremely sensitive to the external environment, especially organic matter. [000...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/28C02F101/16
CPCC02F3/2806C02F3/2846C02F2003/003C02F2101/16C02F2101/166
Inventor 张莉王月萍郝仕伟郝就笑孙清轩
Owner BEIJING UNIV OF TECH
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