Method for culturing microbial flora for purifying waste water

Abstract

The invention discloses a method for culturing a microbial flora for purifying waste water, which comprises the following steps: A, filtering, settling and concentrating active sludge, adding coking wastewater at the temperature of below 33 DEG C, adding nutrients, proteins and microbial growth hormone at the same time, aerating for 3 to 5 days under a constant-temperature condition, settling, discharging supernatant, adding glucose solution and domesticating according to the operation mode of a batch reactor activated sludge process; B, at the end of domestication, screening cocci, bacilli and spirilla, placing into containers for low-temperature storage respectively, injecting 10 percent glucose solution into the containers for repair, and taking the bacterial strains out 24 hours later for mixing; and C, performing aerobic and anaerobic culture of the mixed bacterial strains, and adding a stabilizer and strain protective agent. For common active sludge, the method can reduce the phenol, cyanogens, COD and ammonia nitrogen content of coking wastewater more effectively and reduce sludge discharge obviously.

Description

technical field [0001] The invention relates to a method for cultivating microbial flora, in particular to a method for cultivating microbial flora used in wastewater purification treatment. Background technique [0002] Coking wastewater is formed by the escape and condensation of coal gas during the high-temperature dry distillation process. The pollutants in it are of various types and complex components, which are extremely harmful and difficult to deal with. Due to the advantages of large processing capacity, high purification rate, low cost, and no secondary pollution, microbial treatment of wastewater has been widely used in the field of sewage treatment. However, there are many problems in the general microbial treatment: (1) When the concentration of ammonia nitrogen in the wastewater is high, especially when there is free ammonia, the microbial adsorption performance will decrease, resulting in NO in the wastewater. 2 - accumulation. (2) Microorganisms have poor...

AI Technical Summary

Problems solved by technology

However, there are many problems in the general microbial treatment: (1) When the concentration of ammonia nitrogen in the wastewater is high, especially when there is free ammonia, the microbial adsorption performance will decrease, resulting in NO in the wastewater. 2 - accumulation

(2) Microorganisms have poor impact resistance, and are susceptible to the impact of toxic organic substances in wastewater to poison the enzyme system, which leads to the loss of activity of the enzyme system and ultimately leads to a decline in the treatment effect

Mixing the screened different high-efficiency strains in order to achieve synergy and give full play to their respective advantages. Although it is theoretically feasible, the process is complicated and the cost is high in actual operation.

Images