Device for recovering nitrogen, phosphorus and organic matter resources in sewage

Abstract

The invention relates to the technical field of sewage treatment and resource recycling, in particular to a device for recovering nitrogen, phosphorus and organic matter resources in sewage. The device mainly comprises filter cloth, a biological film, a light source, a rotating shaft, a scraper, a curtain and an air storage tank, wherein the filter cloth is connected into a whole end to end and issupported by the rotating shaft; the filter cloth is distributed in a wave form in the horizontal direction, and the wave-shaped bottom is positioned in water; the scraper is correspondingly arrangedon the surface of the filter cloth; CO2 is injected into a closed space formed by the filter cloth and the curtain. The biological film is periodically soaked in water and exposed in air, so as to transfer the nitrogen, phosphorus and organic matters in the water into the biological film by utilizing the surface adsorption / absorption effect of the biological film in the water and by virtue of photosynthesis in air. By supplementing the light source and injecting the CO2, the photosynthetic efficiency of algae and the like in the biological film is enhanced and improved. Eutrophication causedby sewage is solved, resource recycling of the nitrogen, phosphorus and organic matters is realized, and the process is simple, stable, reliable and efficient in operation.

Description

technical field [0001] The invention relates to the technical field of sewage treatment and resource recycling, in particular to a device for recycling nitrogen, phosphorus and organic matter resources in sewage. Background technique [0002] With the increasing development and utilization of environmental resources by human beings, especially the large-scale development of industrial and agricultural production, and the "urbanization" phenomenon brought about by industrialization, the content of nutrients such as nitrogen and phosphorus in domestic sewage continues to increase and the discharge sites are increasingly concentrated. However, the existing processes of most municipal sewage treatment plants in my country cannot efficiently remove nitrogen and phosphorus, resulting in excessive nitrogen and phosphorus content in the effluent. These nitrogen, phosphorus and other nutrients are discharged into nearby lakes and rivers, which greatly increases the load of nutrients ...

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Problems solved by technology

However, there are many factors restricting its effective operation in the traditional A2 / O process, mainly as follows: 1. The distribution ratio of the amount of sludge in the anaerobic and anoxic sections affects the effect of nitrogen and phosphorus removal, and the amount of sludge in the anaerobic section is large The phosphorus release effect is good, but the denitrification effect is poor. On the contrary, the denitrification effect is good, but the phosphorus release effect is poor; second, in the anoxic stage, phosphorus release and denitrification process compete for carbon source. When the carbon source is insufficient, phosphorus release or Incomplete denitrification; Third, the growth of nitrifying bacteria requires a longer sludge age, but phosphorus is removed from the system mainly through the discharge of excess sludge, so a short sludge age is required to improve phosphorus removal efficiency

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