Denitrifying method for ammonia-containing waste water discharged in acrylic production process

A technology for production process and wastewater, applied in chemical instruments and methods, biological water/sewage treatment, water pollutants, etc., to achieve the effects of stable nitrification and denitrification, strong shock resistance, and rapid adaptation

Active Publication Date: 2013-10-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention discloses a method for denitrification of ammonia-containing wastewater produced in the production process of acrylic fiber, which uses the addition of denitrification microorganisms with similar growth conditions and a synchronous nitrification and denitrification process to solve the problem of discharge of ammonia nitrogen pollutants in acrylic fiber wastewater up to standard

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1 Ammonia-containing wastewater treatment in an acrylic fiber production plant

[0024] The wastewater produced by an acrylic fiber production plant undergoes SBR biochemical treatment and NH 3 - -N concentration is 185mg / L, COD concentration is 350mg / L, BOD concentration is less than 20mg / L, pH value is 7.8. The treated sewage cannot be discharged up to the standard. Adopt the method of the present invention, add " paracoccus denitrification DN-3 and Methylobacterium SDN-3 " and " Arthrobacter FDN-1 and Water's Flavobacterium FDN-2" two types of bacteria with a volume ratio of 2:1, dosing once every three days, each time the amount of bacteria added is 30% lower than the last time, and then according to the amount of sewage treated The 0.1% of the two types of bacterial cells of "Paracoccus denitrifica DN-3 and Methylobacterium SDN-3" and "Arthrobacter FDN-1 and Flavobacterium waterii FDN-2" with a volume ratio of 1:2 Dosing once every three days, each ti...

Embodiment 2

[0027] The waste water produced by an acrylic fiber production plant is treated by A / O process. NH in wastewater 3 - -N concentration is 285mg / L, COD concentration is 450mg / L, BOD concentration is less than 50mg / L, pH value is 8.2. The treated sewage cannot be discharged up to the standard. By adopting the method of the invention, the bacterial agent is added to the sewage treatment system. During the process of adding the bacterial agent, the temperature in the system is 25°C, the dissolved oxygen is 0.1~3.5mg / L, and the pH is 7.6-8.2. For the first time, two types of "Paracoccus denitrificans DN-3 and Methylobacterium SDN-3" and "Arthrobacter FDN-1 and Flavobacterium waterii FDN-2" were added to the sewage treatment system according to 0.3% of the treated sewage volume The bacterial agent with a ratio of 1:1 is added once every three days, and the amount of bacterial cells added is 35% lower than the previous dose. After two doses, the concentration of ammonia nitrogen i...

Embodiment 3

[0029] NH in wastewater from a dry-process acrylic fiber production plant 3 - -N concentration is 350mg / L, COD concentration is 480mg / L, BOD concentration is less than 50mg / L, pH value is 8.2. The treated sewage cannot be discharged up to the standard. By adopting the method of the invention, the bacterial agent is added to the sewage treatment system. During the process of adding bacterial agents, the temperature in the system is 25°C, the dissolved oxygen is 0.1~4.5mg / L, and the pH is 7.5-8.1. For the first time, two types of "Paracoccus denitrificans DN-3 and Methylobacterium SDN-3" and "Arthrobacter FDN-1 and Flavobacterium waterii FDN-2" were added to the sewage treatment system according to 0.8% of the treated sewage volume The proportion of bacteria is 3:1, and after three days, according to 0.5% of the amount of sewage treated, the "Paracoccus denitrification DN-3 and Methylobacterium SDN-3" and "Arthrobacter FDN-1 and Water Flavobacterium FDN-2" is a bacterial age...

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Abstract

The invention discloses a denitrifying method for ammonia-containing waste water discharged in an acrylic production process. The denitrifying method comprises the following step: adding a certain quantity of denitrifier in a sewage treatment system, wherein the treatment temperature of the ammonia nitrogen-containing sewage is 18-40 DEG C, the dissolved oxygen is 0.2-3mg/L, and the pH is 7.5-8.5. Heterotrophic bacteria is used for performing superiority combination to be used as an enhanced microorganism of the waste water treatment so as to remove the ammonia nitrogen, total nitrogen and CODcr in the one reactor, and the waste water treatment effect is good; and in combination with an efficient device, the denitrifying method realizes the standard discharge of the ammonia nitrogen and persistent organic pollutant in the waste water.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering sewage biological treatment, and in particular relates to a biological denitrification method for discharging ammonia-containing waste water in the acrylic fiber production process. Background technique [0002] A large number of highly toxic nitrogen-containing organic substances contained in the wastewater discharged from the acrylic fiber production process are gradually decomposed by various bacteria, and then the toxicity is degraded, but the final product is ammonia nitrogen, which makes the biochemical treatment of dry acrylic fiber wastewater more difficult. At present, the wastewater produced by the dry acrylic fiber production unit is mainly treated by the anaerobic-aerobic-biological activated carbon process. In the initial design of the sewage treatment plant of the dry acrylic fiber factory, the issue of ammonia nitrogen was not considered comprehensively, and the de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30C02F3/34C02F101/16
Inventor 高会杰张鹏李宝忠
Owner CHINA PETROLEUM & CHEM CORP
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