A treatment system and method for denitrification and carbon removal of late-age landfill leachate

Abstract

The invention provides a denitrification and decarbonizing treatment system and method of landfill leachate in a late period, and belongs to the field of wastewater treatment. The system comprises a denitrification reactor, a nitrosation reactor, an anaerobic ammonia oxidation reactor, a concentrating pool, an oxidization pool and two return-flow system. According to the system, the concentratingpool is arranged and used for intercepting nondegradable organic substances in water output through the anaerobic ammonia oxidation reactor; the nondegradable organic substances can be oxidized into degradable organic substances through the oxidization pool, so that a carbon source is supplied to the denitrification process; the return-flow system supplies a proper environment to microorganism, and wastewater can be treated with high efficiency and low consumption; with the adoption of the system for treating the landfill leachate in the late period, the high independence of the denitrification process on additional organic substances can be avoided, so that demands on the organic substances can be decreased, and the denitrification cost of the landfill leachate can be decreased.

Description

technical field [0001] The invention relates to the technical field of waste water treatment, in particular to a treatment system and method for denitrification and carbon removal of late-age landfill leachate. Background technique [0002] With the rapid increase in the amount of domestic waste in my country, the landfill capacity of many domestic waste landfills continues to expand, and the resulting amount of landfill leachate is also increasing. According to the material composition of landfill and the time of landfill, the water quality and quantity of landfill leachate also change greatly. Generally speaking, early landfill leachate is a type of wastewater containing high concentrations of ammonia nitrogen and organic matter, most of which are degradable organic matter, which can be treated by conventional biochemical treatment processes. However, with the prolongation of the landfill time, the organic matter in the wastewater is gradually dominated by non-degradable ...

AI Technical Summary

Problems solved by technology

Therefore, when it is applied to the treatment of old landfill leachate, especially high ammonia nitrogen (NH 4 + -N>1000mg / L) concentration of wastewater treatment, at least 100mg / L of nitrate will be produced, and the total nitrogen in the effluent is difficult to meet the standard

[0004] In addition, for the non-degradable organic matter in landfill leachate, it is generally processed through concentration, drying or incineration at present, and the cost is relatively high.

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