Treatment method of high-salt degradation-resistant wastewater
A treatment method and a refractory technology, which is applied in the field of high-salt refractory wastewater treatment, can solve the problems of large-scale treatment, and achieve the effects of promoting the formation of aggregate structure, improving physical and chemical properties, and improving salt tolerance
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Embodiment 1
[0020] The high-salt refractory wastewater produced by a chemical plant has a salt content of 2.5wt%, a COD of 2000mg / L, a total nitrogen of 300mg / L, a B / C ratio of 0.16, a treatment temperature of 25-30°C, and a pH of 7.0 -7.5, the dissolved oxygen concentration is 2.0-3.0mg / L. During the long-term operation of the system, the removal rate of COD and total nitrogen became significantly worse, and the effluent could not meet the standard.
[0021] Using the treatment method of the present invention, 0.8% of the waste water treatment volume is added to the system every day according to 0.8% of the wastewater treatment volume 1#-8# bacterial agent in Example 1 of CN201510737425.5, and propylene glycol is added at the same time, and the dosage is 0.8 mg / L. After running for 10 days, the treatment effect is shown in Table 1.
[0022] Table 1
[0023]
Embodiment 2
[0025] The high-salt refractory wastewater produced by a chemical plant has a salt content of 5.0wt%, a COD of 1000mg / L, a total nitrogen of 300mg / L, and a B / C ratio of 0.12. The treatment temperature is 25-30°C, the pH is 7.0-7.5, and the dissolved oxygen is 2-3mg / L. During the long-term operation of the system, the removal rate of COD and total nitrogen became significantly worse, and the effluent could not meet the standard.
[0026] Using the treatment method of the present invention, 5% of the wastewater treatment volume is added to the system every day according to the 8# bacterial agent in CN201510737425.5 Example 1, and propylene glycol is added at the same time, and the dosage is 1.0mg / L. After 10 days of operation, it was tested that the effluent COD was lower than 60mg / L, and the total nitrogen was lower than 30mg / L.
Embodiment 3
[0028] The high-salt refractory wastewater produced by a chemical plant has a salt content of 1.5wt%, a COD of 5000mg / L, a total nitrogen of 500mg / L, and a B / C ratio of 0.19. The treatment temperature is 25-30°C, the pH is 7.0-7.5, and the dissolved oxygen is 2-3mg / L. During the long-term operation of the system, the removal rate of COD and total nitrogen became significantly worse, and the effluent could not meet the standard.
[0029] Using the treatment method of the present invention, 0.5% of the waste water treatment volume is added to the system every day according to 0.5% of the wastewater treatment volume 1# bacterial agent in Example 1 of CN201510737425.5, and propylene glycol is added at the same time, and the dosage is 0.5mg / L. After 10 days of operation, it was tested that the effluent COD was lower than 60mg / L, and the total nitrogen was lower than 30mg / L.
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