STUDY ON DIURNAL VARIATION OF METHANE EMISSION FROM DOMESTIC REFUSE LANDFILL

In this paper, the daily variation of CH4 emission in the sealing area of the saddle landfill in Luhe District of Nanjing City was analyzed by static box method, and the possible changes of CH4 were analyzed. The results showed that the variation range of CH4 was 1.9-119.7mg / m3 and the flux range was - 20.6-52.6mg / (m2h) during the whole observation period. The peak of CH4 concentration in different sampling points is different, the peak concentration difference is large, and the diurnal variation of CH4 emission in landfill is random. Stable landfill CH4 emissions are not integral, continuous emissions, but local intermittent emissions, CH4 emissions shorter duration, most of the time in a non-discharge state, the discharge area is random, and the discharge area small. The results show that there is no significant correlation between the CH4 emission landfill and the temperature and humidity at the time of the stable landfill.