A short-distance nitrification-denitrification biomembrane denitrogenation method for nitrogen containing sewage

A short-range nitrification and biofilm technology, which is applied in the field of short-range nitrification and denitrification biofilm denitrification, can solve the problems of large area and achieve fast film formation and good denitrification effect

Active Publication Date: 2017-04-05
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the device is dealing with low C / N and high-concentration ammonia-nitrogen wastewater with small molecular organic matter, the multi-functional pool is not aerated. It is used as a hydrolysis acidification pool. There is no stirring in the pool. The sewage enters from the upper part and exits from the upper part. The bottom will always be The remaining part of the sewage cannot be processed later, and the device occupies a large area

Method used

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  • A short-distance nitrification-denitrification biomembrane denitrogenation method for nitrogen containing sewage
  • A short-distance nitrification-denitrification biomembrane denitrogenation method for nitrogen containing sewage
  • A short-distance nitrification-denitrification biomembrane denitrogenation method for nitrogen containing sewage

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Experimental program
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Effect test

Embodiment 1

[0040] 1. Film-hanging stage

[0041] (1) Dilute the nitrogenous sewage to be treated twice with domestic sewage. After dilution, the concentration of ammonia nitrogen in the sewage is 250mg / L, the concentration of COD is 400mg / L, the pH value of the sewage is controlled to be 7.5-8.5, and the treatment temperature is 30-35 ℃, add glucose and potassium dihydrogen phosphate to adjust BOD in wastewater 5 :N:P=100:5:1.

[0042] (2) Fill the corresponding fillers in the hydrolytic acidification zone, aerobic zone and anaerobic zone, so that the volume of the fillers accounts for 3 / 4 of the volume of each reaction zone, and the activated sludge is filled according to the sludge concentration of 5-10g / L Sprinkle it into the filler in the three reaction zones. Palladium-copper loaded activated carbon catalyst particles are loaded in the transition zone, and the volume accounts for about 3 / 4 of the volume of the transition zone.

[0043] (3) Open the water inlet pipe, adjust the wa...

Embodiment 2

[0051] use figure 1 The shown biofilm denitrification reactor is used to treat the same nitrogen-containing sewage as in Example 1.

[0052] When starting the reactor, first use the low flow rate to operate, according to the flow rate of H m / h, that is, control the residence time of sewage to 60min. Detect the concentration of COD, total nitrogen and ammonia nitrogen in the effluent every 30 minutes; after 150 minutes, the concentration of COD in the effluent <150mg / L, the concentration of ammonia nitrogen <80mg / L, and the concentration of total nitrogen <100mg / L are relatively stable, and then increase the flow rate to 6 / 5Hm / h, detect the concentration of COD, total nitrogen and ammonia nitrogen in the effluent every 20 minutes; after 80 minutes, the concentration of COD in the effluent <70mg / L, the concentration of ammonia nitrogen <40mg / L, the concentration of total nitrogen <50mg / L and relatively stable , increase the flow rate to 3 / 2Hm / h again, and detect the concentrati...

Embodiment 3

[0055] use figure 1 The shown reactor handles the same nitrogenous sewage as in Example 1. The difference is that the nitrous bacteria growth promoter is added in the hydrolytic acidification area of ​​the film-hanging stage and the sewage treatment stage. The nitrous bacteria growth accelerator involved can be prepared according to the methods described in CN201410585655.X, CN201410585481.7, etc., and two types of nitrifying bacteria growth accelerators are prepared according to the ratio and formula of the accelerator in Table 1, and the concentration of the accelerator is Both are 0.5g / L.

[0056] Table 1 Formula and ratio of accelerator

[0057]

[0058] Add nitrous bacteria growth promoter A in the film forming stage, and the dosage is based on the accelerator concentration of 25mg / L in the sewage treatment system. After culturing, the film-hanging stage only needs 70h.

[0059] Add nitrous bacteria growth accelerator B in the film-hanging stage, and the dosage is ...

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Abstract

A short-distance nitrification-denitrification biomembrane denitrogenation method for nitrogen containing sewage is disclosed. A biomembrane reactor having the following structure is adopted, wherein a cross plate a, a vertical plate b, a vertical plate c and a cross plate d are disposed in the reactor, the cross plate a separates the reactor into an upper part and a lower part, the lower part is a hydrolysis acidifying zone and the upper part is an A/O zone; the A/O zone is divided into three parts which are an aerobic zone O, a transition zone and an anaerobic zone A in order through the vertical plate b and the vertical plate c, the lower end of the vertical plate b is hermetically connected to the cross plate a, a water opening is between the upper end of the vertical plate b and the top of the reactor, the upper end of the vertical plate c is hermetically connected to the top of the reactor, a water opening is between the lower end of the vertical plate c and the cross plate a, the left end of the cross plate d is hermetically connected to the bottom of the vertical plate c, the right end of the cross plate d is hermetically connected to the wall of the reactor, and the transition zone is filled with palladium-copper loaded activated carbon catalyst particles. During sewage treatment, water is fed from the bottom of the reactor, passes through the hydrolysis acidifying zone, the aerobic zone, the transition zone and the anaerobic zone in order and discharged from the upper part. Biomembranes in each zone of the reactor are cultured separately, biomembranes with specific performance can be formed, film hanging is rapid and denitrogenation effects are good.

Description

technical field [0001] The invention belongs to the technical field of sewage biological treatment, and in particular relates to a short-range nitrification and denitrification biofilm denitrification method for nitrogen-containing sewage. Background technique [0002] In recent years, with the rapid development of my country's urbanization, my country's water environment pollution and water eutrophication have become more and more serious. More and more seriously hinder the development of our national economy. Nitrogen is the main pollutant that causes eutrophication in water bodies, and it is particularly important to control the total nitrogen content in discharged sewage. [0003] The traditional denitrification treatment process is full nitrification and denitrification biological denitrification, that is, under the action of nitrosifying bacteria, ammonia nitrogen is oxidized into nitrite nitrogen, and then under the action of nitrifying bacteria, nitrite nitrogen is o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F101/16
Inventor 赵胜楠高会杰孙丹凤郭志华
Owner CHINA PETROLEUM & CHEM CORP
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