Photosynthetic microorganism-based supplementary illumination sewage purification treatment method

Abstract

The invention discloses a photosynthetic microorganism-based supplementary illumination sewage purification treatment method. The method comprises the steps: 1) regulating the pH value of sewage, and standing for precipitation; (2) conveying a supernatant into a facultative tank, carrying out facultative treatment through chemical energy heterotrophic mixed bacteria, and controlling the illumination intensity to be 7000 lx-10000 lx; (3) inputting the sewage into an aerobic tank, carrying out aerobic treatment by the aerobic tank, and controlling the illumination intensity to be 7000 lx-10000 lx; 4) inputting the sewage into a photoautotrophic tank, purifying the sewage through photoautotrophic mixed bacteria, and controlling the illumination intensity to be 7000 lx-10000 lx; 5) inputting the sewage into a sedimentation tank, standing the sewage, separating microbial floccules from the water body, and collecting the microbial floccules in the sediment for recycling; and 6) discharging the water treated by the sedimentation tank after the water quality reaches the standard. According to the photosynthetic microorganism-based supplementary illumination sewage purification treatment method, sewage pollutants are degraded by utilizing microbiota corresponding to the facultative tank, the aerobic tank and the photosynthetic autotrophic tank, and meanwhile, illumination is supplemented at night, so that microbial strains can perform photosynthesis at night or in cloudy and rainy days, and the sewage treatment effect is improved.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a photosynthetic microorganism-based supplementary light purification sewage treatment method. Background technique [0002] With the improvement of living standards, the economic development speed of my country's cities is relatively fast, and the amount of sewage generated by production and life in cities is also gradually increasing. In the annual sewage discharge in the country, only 10% of domestic sewage and 70% of industrial sewage are treated, and the effluent of about half of the industrial sewage treatment facilities does not meet the national discharge standards, and the rest of the untreated sewage is directly discharged into rivers and lakes As a result, my country's water environment has been seriously polluted and destroyed. [0003] At present, the traditional activated sludge method is widely used in the urban sewage treatment process in our country. How...

AI Technical Summary

Problems solved by technology

However, because the ammonia nitrogen index in urban sewage is significantly higher than the design value, the C-N ratio of urban sewage influent is unbalanced. The existing sewage treatment process cannot solve the problem of C-N ratio imbalance, which affects the sewage treatment efficiency and the sewage treatment effect is poor.