Pretreatment method and device used for processing old household garbage leachate

Abstract

The invention discloses a pretreatment method used for processing old household garbage leachate. The pretreatment method comprises following steps: 1, old household garbage leachate is introduced into an ultraviolet-Fenton reactor, the pH value of the old household garbage leachate is adjusted to be lower than 7, a ferrous ion solution is introduced into the ultraviolet-Fenton reactor, and hydrogen peroxide is introduced into the ultraviolet-Fenton reactor; 2, the ultraviolet wave band in the ultraviolet-Fenton reactor is adjusted, oxidation reaction is carried out under ultraviolet lamp irradiation, and the ultraviolet lamp is coated with a reaction system liquid surface, after oxidation, water discharged from the ultraviolet-Fenton reactor is introduced into a flocculation sedimentationbasin, pH value is adjusted to be higher than 7, and an obtained solution is allowed to stand for precipitation; 4, a supernatant obtained in the flocculation sedimentation basin is introduced into amineralized refuse bioreactor, is subjected to primary filtering using a filter layer A, and is introduced into a nitration reaction layer for nitration and denitrification reaction, after processing, obtained discharged water is introduced into a filter layer B and is discharged. The invention also discloses a device using the pretreatment method. The method and the pretreatment method are capable of improving biodegradability of old household garbage leachate.

Description

technical field [0001] The invention relates to the field of landfill leachate treatment, in particular to a pretreatment method and device for aged domestic waste leachate. Background technique [0002] Garbage leachate is a kind of high-concentration and highly polluted organic wastewater produced in the sanitary landfill process of domestic garbage and industrial waste. years), the BOD5 / COD value is low, and the biochemical properties are reduced; the ammonia nitrogen concentration increases, the C / N ratio decreases, and the nutrient ratio is seriously out of balance, which seriously affects the effective operation of the leachate biochemical treatment system. [0003] The newly promulgated "Standards for Pollution Control of Domestic Garbage Landfill Sites" (GB16889-2008) puts forward strict discharge standards for the discharge water quality of landfill leachate, which poses challenges for the treatment of landfill leachate in old age, especially the denitrification tre...

AI Technical Summary

Problems solved by technology

The existing landfill leachate treatment process can treat conventional landfill leachate up to the standard discharge, but it is not suitable for the treatment of aging landfill leachate. Landfill leachate itself is a kind of refractory compound with complex components and strong toxicity. High-concentration organic wastewater has a significant toxic effect on microorganisms. Especially with the increase of "age", the proportion of refractory organic poisons contained in aging landfill leachate increases, resulting in a decrease in the biodegradability of leachate year by year, which is extremely difficult to treat

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