Treating method for ammonia-containing wastewater
A treatment method and technology of sewage treatment plants, applied in special compound water treatment, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as no effect, improve effluent water quality, and strengthen synergy , the effect of increasing the denitrification rate
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Embodiment 1
[0025] During the catalyst production process of an oil refinery, a waste water containing refractory organic matter and ammonia nitrogen will be produced. The water quality characteristics are: pH9.2, COD 900mg / L, BOD 100mg / L, ammonia nitrogen 137mg / L. During the long-term operation of the system, the ammonia nitrogen removal effect is poor, resulting in a total nitrogen concentration of up to 152mg / L, the SVI of the activated sludge is greater than 200mL / g, and the sedimentation performance is poor.
[0026]Treat according to the method of the present invention, adjust the sludge concentration of the treatment system to be 1000mg / L. According to the accelerator concentration in the treatment system is 1.0mg / L, the growth accelerator M1 is added, and the DO in the system is controlled to be about 3.0mg / L at the initial stage. When the ammonia nitrogen removal rate is greater than 50%, add liquid bacterial suspension A to the system every day according to 0.008% of the volume ...
Embodiment 2
[0028] Treat the same waste water as in Example 1, and adjust the sludge concentration of the treatment system to be 1500 mg / L. Add microbial growth promoter M2 according to the concentration of accelerator in the treatment system at 1.0mg / L, and control the DO in the system at about 2.5mg / L at the initial stage. When the ammonia nitrogen removal rate is greater than 70%, add liquid bacterial suspension B to the system every day at 0.005% of the volume of wastewater treated per hour, and add microbial growth promoters according to the accelerator concentration in the reaction system at 0.5mg / L N2, while controlling DO at about 1.5mg / L. When the removal rate of ammonia nitrogen is greater than 85%, DO is controlled at about 0.4mg / L and administered for 13 days. The sewage treatment temperature is 25°C and the pH is 8.5. The SVI in the detection system is less than 200mL / g. After one month of operation, the concentration of ammonia nitrogen in the effluent after analysis and t...
Embodiment 3
[0030] A chemical wastewater containing refractory organic pollutants, the water quality characteristics are: COD is about 2000mg / L, BOD is about 450mg / L, ammonia nitrogen is about 150mg / L, and pH is 8.7. After using the conventional activated sludge treatment process, the COD of the effluent is still as high as 300mg / L, the ammonia nitrogen is still as high as 200mg / L, and the total nitrogen is as high as 250mg / L.
[0031] Treat according to the method of the present invention, and adjust the sludge concentration of the treatment system to be 2000mg / L. Add microbial growth promoter M3 according to the concentration of accelerator in the treatment system at 0.8mg / L, and control the DO in the system at about 2.0mg / L at the initial stage. When the removal rate of ammonia nitrogen is greater than 60%, add liquid bacterial suspension C to the system every day according to 0.008% of the volume of wastewater treated per hour, and add microbial growth promoter according to the accele...
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