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
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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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