Method for further denitrogenation by using wood and rotten wood

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...

AI Technical Summary

Problems solved by technology

However, anammox microorganisms can only be active under high concentration conditions, and anammox microorganisms grow slowly, are difficult to cultivate, and their activity is easily inhibited

Therefore, in order to maintain the activity of anammox microorganisms, a high cost is required

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