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Device and method for realizing single-stage self-cultivation denitrification of city sewage by inhibiting nitrobacteria

A technology for autotrophic denitrification of urban sewage, applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve high operating costs, unstable operation, large footprint, etc. problems, to achieve the effect of saving operating costs, reducing floor space, and reducing the amount of residual sludge

Active Publication Date: 2013-03-13
黑龙江翰恒环保科技有限公司
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Problems solved by technology

[0003] The present invention aims to solve the technical problems of the existing single-stage short-range nitrification / ANAMMOX denitrification process, such as difficult start-up, unstable operation, easy conversion to full-process nitrification, large floor area, and high operating costs; Device and method for realizing single-stage autotrophic denitrification of urban sewage

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  • Device and method for realizing single-stage self-cultivation denitrification of city sewage by inhibiting nitrobacteria
  • Device and method for realizing single-stage self-cultivation denitrification of city sewage by inhibiting nitrobacteria

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specific Embodiment approach 1

[0018] Specific implementation mode one: combine figure 1 To illustrate, in this embodiment, the device for inhibiting nitric acid bacteria to realize single-stage autotrophic denitrification of urban sewage includes a water inlet tank 1, an inlet pump 2, a DO measuring instrument 3, a DO probe 4, a pH measuring instrument 5, a pH probe 6, Main reaction cylinder 7, external circulation conduit 8, external circulation pump 10, mud discharge pipe 11, sampling port 12 and water inlet pipe 13, several sampling ports 12 are arranged on the side wall of main reaction cylinder 7, the water outlet of water inlet tank 1 is connected with The water inlet of the water inlet pipe 13 is communicated with the water inlet pump 2, and the water outlet of the water inlet pipe 13 is located directly above the main reaction cylinder 7, and the DO probe 4 and the pH probe 6 are arranged in the main reaction cylinder 7, and the DO probe 4 is connected with the DO measuring instrument 3 , the outle...

specific Embodiment approach 2

[0019] Specific implementation mode two: combination figure 1 To illustrate, the difference between this embodiment and the first embodiment is that the external circulation conduits 8 are arranged in a "J" shape or an "S" shape. Other compositions and connections are the same as in the first embodiment.

specific Embodiment approach 3

[0020] Specific embodiment three: In this embodiment, the method for suppressing nitric acid bacteria to realize the single-stage autotrophic denitrification of urban sewage is realized through the following steps:

[0021] Step 1: According to mlss=3g / L~4g / L, add anammox sludge into the main reaction cylinder 7, then feed in the nutrient solution, open the external circulation pump 9 at the same time, and control the reaction temperature at 25~30°C , hang a film on the inner wall surface of the external circulation catheter, replace the nutrient solution 2 to 3 times a day, and the NH in the nutrient solution 4 + -N is 60mg / L, NO 2 - -N is 80mg / L, alkalinity (as CaCO 3 meter) is 500mg / L, PO 4 3- -P is 10mg / L, and after 30 days of acclimatization, add the inoculation amount to the main reaction cylinder 7 and be 3g / L nitrous acid bacteria, and at the same time, the nutrient solution is gradually replaced by urban sewage at a rate of 5% increase in urban sewage every day. ...

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Abstract

The invention relates to a device and a method for realizing single-stage self-cultivation denitrification of city sewage by inhibiting nitrobacteria, relates to a device and a method for sewage treatment, and is used for solving the technical problems of difficult starting, unstable operation, easiness in whole nitration conversion, large floor area, high operation cost and the like existing in the existing single-stage partial nitrification / anaerobic ammonia oxidation process. The water outlet of a water inlet tank and the water inlet of a water inlet pipe are communicated with each other by a water inlet pump, the water outlet of the water inlet pipe is positioned right above a main reaction cylinder, the outlet of an outer circulation guide pipe is communicated with the inlet in the upper part of the main reaction cylinder, an outer circulating pump is installed on the outer circulation guide pipe, and fillers are fixed on the inner wall of the outer circulation guide pipe. The method comprises the steps of culturing a biofilm firstly, then introducing the city sewage into the main reaction cylinder, and conducting single-stage partial nitrification / anaerobic ammonia oxidation for self-cultivation denitrification. According to the device and the method, the occupying area is small, the management is simple and convenient, the treatment efficiency is high, the sewage is subjected to denitrification without aeration, a large amount of operation cost is saved, and nitrobacteria can be inhibited rapidly and effectively by a method of adding sulfide in a grading manner.

Description

technical field [0001] The invention relates to a sewage treatment device and method; specifically, the device and method for inhibiting nitric acid bacteria to realize single-stage autotrophic denitrification of urban sewage. Background technique [0002] The existing single-stage short-cut nitrification / ANAMMOX denitrification process is difficult to start. In the single-stage short-cut nitrification / anammox denitrification process, due to the presence of oxygen in the system, nitric acid bacteria will compete with anammox bacteria for substrate nitrite, which makes the system very easy to change to full nitrification. Based on this, scholars at home and abroad have proposed a variety of control methods for the inhibition of nitric acid bacteria, such as the control system DO, temperature, pH, nitrogen load, free ammonia and free nitrite, etc. When treating wastewater with high ammonia nitrogen, the method of limiting oxygen is usually used to inhibit the growth of nitric...

Claims

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Application Information

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IPC IPC(8): C02F3/34C02F3/30
Inventor 高大文卢健聪孙学影梁红
Owner 黑龙江翰恒环保科技有限公司
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