|
Abstract : |
A new sanitary landfill was proposed to be constructed to receive the municipal solid waste generated in the city of Tehran with a capacity of about 7000 tons per day. Fresh leachate was characterized to have high organic content BOD5 of about 30,000 mg L-1 and TOC of about 25900 mg L-1. The clayey soil proposed to be used as bottom liner material for the landfill is characterized as being saline. An attempt was made to preliminarily assess the compatibility of the local soil with leachate in terms of possible changes in unsaturated hydraulic conductivity of liner material. Soil samples were compacted and placed in a column to be tested for compatibility in accordance with EPA Method 9100 of SW846 test method series. The results of the experiment indicated that even in presence of fresh leachate being employed to the columns at a head of 15 cm for 10 days, a very limited infiltration to the compacted soil occurred. As a preliminary assessment, it could be concluded that the local clayey soil can potentially be used as bottom liner material in terms of very limited changes in its hydraulic conductivity when subject to leachate mounding. Further research is required with additional samples. , A new sanitary landfill was proposed to be constructed to receive the municipal solid waste generated in the city of Tehran with a capacity of about 7000 tons per day. Fresh leachate was characterized to have high organic content BOD5 of about 30,000 mg L-1 and TOC of about 25900 mg L-1. The clayey soil proposed to be used as bottom liner material for the landfill is characterized as being saline. An attempt was made to preliminarily assess the compatibility of the local soil with leachate in terms of possible changes in unsaturated hydraulic conductivity of liner material. Soil samples were compacted and placed in a column to be tested for compatibility in accordance with EPA Method 9100 of SW846 test method series. The results of the experiment indicated that even in presence of fresh leachate being employed to the columns at a head of 15 cm for 10 days, a very limited infiltration to the compacted soil occurred. As a preliminary assessment, it could be concluded that the local clayey soil can potentially be used as bottom liner material in terms of very limited changes in its hydraulic conductivity when subject to leachate mounding. Further research is required with additional samples., |
