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Biomembrane denitrification method for nitrogen containing sewage

A biofilm and sewage technology, applied in the field of biofilm denitrification of nitrogenous sewage, can solve the problems of excessive dissolved oxygen and affecting the completeness of denitrification reaction, and achieve enhanced oxidation decomposition and nitrogen transformation and removal, impact resistance Strong capacity and good denitrification effect

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

AI Technical Summary

Problems solved by technology

However, the outlet of the aerobic tank is directly connected to the inlet of the anoxic tank, which may easily cause the dissolved oxygen in the anoxic tank to exceed the standard and affect the thoroughness of the denitrification reaction.

Method used

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  • Biomembrane denitrification method for nitrogen containing sewage
  • Biomembrane denitrification method for nitrogen containing sewage
  • Biomembrane denitrification method for nitrogen containing sewage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] 1. Film-hanging stage

[0040] (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 7.0-8.0, and the treatment temperature is 25-35 ℃, add glucose and potassium dihydrogen phosphate to adjust BOD in wastewater 5 :N:P=100:5:1.

[0041] (2) Fill the corresponding fillers in the hydrolytic acidification zone, aerobic zone and anaerobic zone, so that the volume of the fillers accounts for about 3 / 4 of the volume of each reaction zone, and the activated sludge is filled according to the sludge concentration of 5-10g / L. The mud is scattered into the packing in the three reaction zones. Fill the transition zone with sponge iron oxygen scavenger particles, the volume accounts for about 3 / 4 of the transition zone volume.

[0042] (3) Open the water inlet pipe, adjust the water inlet flow rate...

Embodiment 2

[0050] use figure 1 The shown biofilm denitrification reactor is used to treat the same nitrogen-containing sewage as in Example 1.

[0051] When starting the reactor, first run at a low flow rate, according to the flow rate of Hm / h, that is, control the sewage residence time to 60min. Detect the concentration of COD, total nitrogen and ammonia nitrogen in the effluent every 30 minutes; after 180 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 140 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 concentration of COD, to...

Embodiment 3

[0054] use figure 1 The shown reactor handles the same nitrogenous sewage as in Example 1. The difference is that microbial growth promoters are added in the film-hanging stage and the hydrolytic acidification area of ​​the sewage treatment stage. The microbial growth promoter involved can be prepared according to the methods described in CN201410585430.4 and CN201410585449.9, etc., and two types of nitrifying bacteria growth promoters are prepared according to the ratio and formula of the accelerator in Table 1, and the concentration of the accelerator is 0.5g / L.

[0055] Table 1 Formula and ratio of accelerator

[0056]

[0057] Add microbial growth promoter A at the stage of film formation, and the dosage is based on the accelerator concentration of 25mg / L in the sewage treatment system. After culturing, the membrane-hanging stage only takes 84 hours.

[0058] Add microbial growth promoter B in the film-hanging stage, and the dosage is based on the accelerator concen...

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Abstract

The invention discloses a biomembrane denitrification method for nitrogen containing sewage. A biomembrane denitrification reactor has the structure described as follows: a transversal plate (a), a vertical plate (b), a vertical plate (c) and a transversal plate (d) are arranged in a reactor, wherein the transversal plate (a) divides the reactor into an upper part and a lower part, wherein the lower part is a hydrolytic acidification zone and the upper part is an A / O zone. The A / O zone is divided into three parts by the vertical plate (b) and the vertical plate (c), wherein the three parts successively are an aerobic zone (O), a transition zone and an anaerobic zone (A). The lower end of the vertical plate (b) is sealedly connected to the transversal plate (a). A water passing gap is formed between the upper end and the top of the reactor. The upper end of the vertical plate (c) is sealedly connected to the top of the reactor. A water passing gap is formed between the lower end of the vertical plate (c) and the transversal plate (a). The left end of the transversal plate (d) is sealed connected to the bottom of the vertical plate (c), while the right end is connected to a wall of the reactor. The transition zone is filled with sponge iron deoxidant granules. In sewage treatment, sewage is fed from the bottom of the reactor, and successively passes through the hydrolytic acidification zone, the aerobic zone, the transition zone and the anaerobic zone, and is discharged from the upper part. In the reactor, biomembranes in the zones are cultured independently, so that the biomembranes having special functions can be cultured better. The reactor has high biomembrane forming speed and has good denitrification effect.

Description

technical field [0001] The invention belongs to the technical field of sewage biological treatment, and in particular relates to a biofilm denitrification method for nitrogenous 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] Among the biological denitrification processes, the A / O biological denitrification process has the advantages of small tank capacity, high denitrification efficiency, and convenient operation and management. When the traditional A / O reactor enters the anaerobic zone from the aerobic zone, part of the dissolved oxygen is often brought in, making t...

Claims

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Application Information

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IPC IPC(8): C02F3/30
Inventor 赵胜楠高会杰孙丹凤郭志华
Owner CHINA PETROLEUM & CHEM CORP
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