Abstract
Using SBR to study the influence of light time on the effluent quality of the symbiotic system of symbiotic bacteria and algae, so as to get the appropriate operating parameters. In the artificial sewage treatment as the goal, then mixed with two sink pool algae and sewage treatment plant activated sludge system, start algae inter-growth, when HRT was 9h, and the temperature is (25±1)°C and pH is about 7, the same water and other parameters are fixed. The change of illumination time, examine the effluent quality and sludge properties, so as to obtain the sewage treatment effect of optimized illumination time. The results showed that when the illumination time was 8 hours, the removal efficiency of total nitrogen, total phosphorus and COD was best, and the activity of SBR was better. Considering the light time is 8 hours, the dark state of the domestic sewage treatment is better for 4 hours.
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