Study on Properties of Aged Refuse Used as Daily Covering Material in Bioreactor Landfill Site
ZHANG Li-mei et al(Southwest Jiaotong University,Chengdu,Sichuan 610031)
[Objective] The study aimed to confirm the removal effect of aged refuse on pollutants in leachate.[Method] With the compost garbage that was in natural air dry after second fermentation in Deyang compost site as tested aged refuse,and the leachate generated in life domestic waste landfills of Changan,Chengdu City as tested leachate,the property of aged refuse with different particle size use as landfill covering material was studied by determination on the basic character of aged refuse and removal test on contaminant in leachate.[Result] The permeability coefficient K20 of aged refuse was mainly at 10-5 cm/s level,the K20 of aged refuse only with granularity of d10 mm was at 10-4 cm/s level.The pH of aged refuse was 8.41,showed weak alkaline.The removal effect of aged refuse with granularity of d1 mm on COD and NH+4-N was better than that of the other 3 granularities(d3,5,10 mm),and along with the increase of granularity,the removal rate of aged refuse on pollutants had the decline trend.The removal effect of aged refuse on NH+4-N was not as good as on that of COD.[Conclusion] The aged refuse could be used as a new type and replaced landfill covering material with good performance.
【CateGory Index】： X705