Autotrophic denitrification/nitration denitrification and dephosphorization method for recycling coupling iron through organic matter of domestic sewage

Abstract

The invention discloses an autotrophic denitrification / nitration denitrification and dephosphorization method for recycling coupling iron through organic matter of domestic sewage. The method is characterized by comprising the steps that the organic matter in the domestic sewage is sufficiently absorbed by activated carbon; substances containing iron are put into an oxygen deprivation pond, and nitrate nitrogen, nitrite nitrogen and phosphorus in the sewage are removed; the activated carbon after adsorption is added to a water heating kettle for water heating treatment; ammoniacal nitrogen inthe sewage is converted into nitrate nitrogen and nitrite nitrogen through nitrifying bacteria; the water outlet part flows back to the oxygen deprivation pond, nitrate nitrogen and nitrite nitrogen are removed in the iron autotrophic denitrification process, and the other enters a secondary sedimentation pond for sedimentation; the water and sludge are discharged separately, and finally the effect of recycling, denitrifying and dephosphorizing the organic matter in the domestic sewage is achieved. According to the method, the operation cost is low, an external carbon source does not need to be added, the organic matter, total nitrogen and total phosphorus in the domestic sewage are efficiently removed, and through a water heating method, the organic matter in the sewage can be recycled, carbonized and recycled.

Description

technical field [0001] The invention relates to a method for recycling organic matter in domestic sewage coupled with iron autotrophic denitrification / nitrification denitrification and phosphorus removal, belonging to the field of sewage treatment. Background technique [0002] With the continuous acceleration of urbanization in my country in recent years, while the urban population has increased, the discharge of domestic sewage has also increased rapidly. The types of domestic sewage are complex. If they are discharged into natural water bodies without treatment or if the treatment is not up to standard, it will directly cause harm to the human health of residents and the natural environment. In order to realize the sustainable development of the urban construction process and ensure the health and safety of residents, it is necessary to do a good job in the treatment of domestic sewage. The "Pollutant Discharge Standards for Urban Sewage Treatment Plants" (GB 18918-2002)...

AI Technical Summary

Problems solved by technology

However, in the actual use process, there is a problem of high regeneration cost of saturated activated carbon

Hydrothermal carbonization reaction is a typical exothermic process, which mainly reduces the content of O and H in raw materials through dehydration and decarboxylation reactions, but the specific reaction process is very complicated. At present, hydrothermal carbonization is accepted by most researchers. The process is mainly divided into the following stages: (1) The precursor is hydrolyzed into monomers, and the pH value of the system drops; (2) The monomers are dehydrated and the polymerization reaction is induced; (3) The aromatization reaction leads to the formation of the final product

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