Method for further denitrogenation by using wood and rotten wood

A technology for decaying wood and wood, applied in the field of anammox bacteria to achieve denitrification of sewage, can solve the problems of slow growth of anammox microorganisms, inhibition of activity, high cost, etc., to improve the activity and reproduction speed, and reduce costs. , the effect of saving manpower and material resources

Inactive Publication Date: 2014-03-26
WUHAN BIHU ENVIRONMENTAL ENG DESIGN
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Problems solved by technology

However, anammox microorganisms can only be active under high concentration conditions, and anammox microorganisms grow slowly, are difficult...

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  • Method for further denitrogenation by using wood and rotten wood
  • Method for further denitrogenation by using wood and rotten wood
  • Method for further denitrogenation by using wood and rotten wood

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Embodiment Construction

[0023] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0024] Please refer to figure 1 , The embodiment of the present invention provides a method for one-step denitrification using wood and decayed wood, which is used for sewage treatment. The method for utilizing wood to carry out one-step denitrification comprises the following steps:

[0025] Step S1, soaking the rotten wood with a hydrochloric acid solution with a concentration of 9-10% for 20-30 hours, so that the hydrochloric acid solution corrodes the rotten wood to form a plurality of microscopic pores that are convenient for bacterial growth; then, remove the rotten wood, and water Rinse off residual hydrochloric acid solution on decayed wood.

[0026] In order to avoid the residual hydrochloric acid solution attached to the de...

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Abstract

The present invention discloses a method for further denitrogenation by using wood and rotten wood. The method comprises: S1, continuously soaking rotten wood for 20-30 h by using a hydrochloric acid solution with a concentration of 9-10%, taking the rotten wood out, and rinsing; S3, placing the rotten wood into an anaerobic ammonium oxidation base inorganic salt solution to soak for 28-32 days; and S5, placing the rotten wood in a denitrogenation tank to carry out bacterial culture, maintaining the temperature in the denitrogenation tank at 20-30 DEG C, maintaining the oxygen concentration and the like of 5-8 mg/L, discharging sewage into the denitrogenation tank, and gradually growing the microbial flora on the rotten wood, wherein one-step denitrogenation can be achieved when the proportion of delta-Proteobacteria achieves more than 50%. According to the present invention, the rotten wood is adopted to create the nature parasitism environment for the anaerobic bacteria, and the survivability and the propagation speed of the bacteria are improved; and any chemical or organic substances are not required to be added during the denitrogenation process, aeration is not required, and the bacteria in the sewage are directly utilized to carry out back-bite decontamination, such that raw material consumption is reduced, and manpower and resources are saved so as to reduce cost.

Description

technical field [0001] The invention relates to a method for cultivating anaerobic ammonium oxidizing bacteria with wood as the raw material of the main culture source to achieve denitrification of sewage, in particular to a method for one-step denitrification using wood and decayed wood. Background technique [0002] There are a lot of nitrogen-containing pollutants in modern industrial and domestic sewage, which can easily lead to eutrophication of water bodies and seriously endanger the environment. Currently, the most commonly used denitrification technology is nitrification and denitrification. Nitrification and denitrification denitrification technology requires a higher aeration rate to meet the reaction of ammonia oxygen conversion to nitrate, and when the organic matter content is low, an additional organic carbon source needs to be added to ensure denitrification efficiency. Therefore, the operating cost of the denitrification process is high and the energy consum...

Claims

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Application Information

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IPC IPC(8): C02F3/34C02F3/28
Inventor 蔡琼华陈亮星
Owner WUHAN BIHU ENVIRONMENTAL ENG DESIGN
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