Small integrated treatment device for domestic sewage, and sewage treatment method

Abstract

The invention provides a small integrated treatment device for domestic sewage. The characteristic that the removal efficiency of pollutants is reduced with the reduction of the concentration of the pollutants in the aerobic stage of a traditional activated sludge method is utilized, and the adsorption and enrichment effects of an aerobic-facultative percolation system on the pollutants are utilized, so a mode of combining the two processes is adopted to solve the problem of low treatment efficiency of the traditional activated sludge method on low-concentration wastewater is solved, the defect of large occupied area of the aerobic-facultative percolation system is also overcome, the load resistance of the system is improved, and the size of the integrated device is further reduced; and activated sludge generated in an anaerobic zone and an aerobic zone serves as one of nutrient sources of a biological membrane in the aerobic-facultative percolation system at the same time, and is decomposed and utilized by the biological membrane in the aerobic-facultative percolation system. The device reduces the sludge treatment cost and the management cost.

Description

technical field [0001] The invention relates to the technical field of domestic sewage treatment, in particular to a small integrated treatment device for domestic sewage treatment and a sewage treatment method. [0002] technical background [0003] The small-scale and equipment-based in-situ sewage treatment technology has been effectively developed at home and abroad because of its low comprehensive investment, short construction period, and local benefits. At present, the main process of the mainstream small integrated equipment in the domestic market is the traditional activated sludge process. [0004] The removal of phosphorus in the traditional activated sludge method is mainly to use the characteristics of anaerobic phosphorus-releasing and aerobic phosphorus-absorbing bacteria to absorb phosphorus in the activated sludge and remove it by sludge discharge. This method generally has low phosphorus removal efficiency. Secondly, because the small integrated equipment g...

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Problems solved by technology

This method generally has low phosphorus removal efficiency. Secondly, because the small integrated equipment generally has a small processing scale and project sites are generally scattered, it is generally difficult to have special personnel to manage and discharge sludge regularly, and generally seldom set up sludge concentration Pools and filter presses, the sludge is difficult to collect and treat effectively

[0005] The removal efficiency of pollutants in the aerobic stage of the traditional activated sludge process decreases as the concentration of pollutants decreases, that is, when the concentration of pollutants is high, its volume utilization rate is high and the treatment efficiency is high; When it is low, its volume utilization rate is low and the processing efficiency is low

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