Photosynthetic bacteria sewage treatment method

Abstract

The invention belongs to the field of water processing, and particularly relates to a photosynthetic bacteria sewage treatment method. The method includes the steps that firstly, heterotrophism culturing of photosynthetic bacteria is conducted for 2 days to 3 days so as to make the photosynthetic bacteria be in the logarithmic phase; 5% to 50% of the volume of the photosynthetic bacteria liquid is inoculated into a photoreactor with waste water for batch cultivation, wherein the initial concentration of the adopted waste water ranges from 3000 mg / L to 10000 mg / L; meanwhile, low-frequency low-intensity ultrasonic wave stimulation is applied on the photosynthetic bacteria in the photoreactor for a certain time; finally, the photosynthetic bacteria in the photoreactor is recycled after being cultured 81 hours to 120 hours in the photoreactor, thallus carotenoid is extracted, and meanwhile, the pollutant removal condition in the waste water is monitored. According to the photosynthetic bacteria sewage treatment method, the yield of the photosynthetic bacteria and the yield of carotenoid are increased through low-intensity ultrasonic wave irradiation, and efficient accumulation of the photosynthetic bacteria and the carotenoid and waste water processing can be conducted synchronously.

Description

technical field [0001] The invention belongs to the field of water treatment, in particular to a method for treating photosynthetic bacteria sewage. Background technique [0002] With the acceleration of my country's industrialization process and the rapid development of social economy, the discharge of industrial wastewater has increased year by year. A large amount of industrial wastewater is discharged into the environment, which will cause serious pollution to the water environment, and the task of wastewater treatment is arduous. [0003] The current wastewater treatment methods include activated sludge method and biofilm method. Among them, the activated sludge method is widely used in sewage treatment as a traditional biological sewage treatment method. However, the activated sludge method is prone to produce a large amount of excess sludge. These excess sludge are not only difficult to handle, but will increase the cost of treatment and disposal, and the accumulat...

AI Technical Summary

Problems solved by technology

However, the yield of photosynthetic bacteria in the traditional photosynthetic bacteria wastewater treatment process is low, which weakens the recovery value of photosynthetic bacteria as a source of carotenoid extraction

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