NOVELTY - Denitriding and restraining methane discharge for garbage percolate comprises loading garbage percolate in nitration reactor, and inoculating nitration fungicide; starting aeration system; depositing and separating water from mud, reflowing sludge to nitration tank, reflowing nitration percolate to in situ denitrification reactor, conducting in situ denitriding and decarbonizing treatment; and controlling recharge amount of nitration percolate and nitrogen load and using denitrification reaction for replacing methane reaction for restraining methane generation and discharge.    USE - Method for denitriding and restraining methane discharge for garbage percolate, particularly for treating refuse landfill and percolate integrally.    ADVANTAGE - The off-site nitration is used for fast transforming the ammonia nitrogen in percolate into nitrate nitrogen and returning percolate to garbage landfill body. The landfill body is used as bioreactor for having the in situ denitrification reaction for denitriding and restraining methane generation. The process takes the organic matter in the field garbage as carbon source for speeding up the stabilization process for garbage. The convention combines the ectopic nitrification and the in situ denitrification technology for realizing the high effect denitriding and the methane discharge restraining effect of the percolate. The life rubbish landfill can be stabilized fast. The method has low consumption and high effect.    DETAILED DESCRIPTION - Denitriding and restraining methane discharge for garbage percolate, comprises:    (A) adjusting the pH of garbage percolate at pH of 7.8-8.2, where the carbon/nitrogen (C/N) value of which is lower than 3, loading the garbage percolate in nitration reactor, and inoculating highly effective nitration fungicide (CGMCC No. 2824) in a volume ratio of garbage percolate of 1/1000;    (B) starting the aeration system, controlling the DO at 0.5-2 mg/L, and when the ammonia nitrogen concentration is lower than 15 mg/L, discharging the water;    (C) guiding the water to depositing tank and separating the water from mud, reflowing the sludge to nitration tank, reflowing the upper clean liquid, particularly the nitration percolate to the in situ denitrification reactor, using the rich carbon source, microorganism and anaerobic environment in the reactor for in situ denitriding and decarbonizing treatment; and    (D) controlling the recharge amount of nitration percolate and nitrogen load for greater than 10.45 gT0N/(tTS.day), and using the denitrification reaction for replacing the methane reaction for restraining methane generation and discharge.    DESCRIPTION OF DRAWING(S) - The drawing is a schematic view of a method for denitriding and restraining methane discharge (Drawing includes non-English language text).