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DIRECT EVAPORATION FROM THE WASTE BODY AND ITS INFLUENCE ON LEACHATE GENERATION IN LANDFILLS IN ARID AREAS

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Author(s): M.A.ABDOLI | HANS GUNTER RAMKE | HOSSEIN GHIASINEJAD

Journal: Journal of Applied Sciences in Environmental Sanitation
ISSN 0126-2807

Volume: 4;
Issue: 3;
Start page: 245;
Date: 2009;
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Keywords: Water balance | direct evaporation | evaporation pan

ABSTRACT
Direct Evaporation from Waste is one of the dominant phenomena for landfill leachate production and compost management in arid and semi-arid regions. In this article a newly established test is performed to determine a correlation between pan evaporation and waste surface evaporation. A container with diameter of 120 centimeter and height of 60 centimeter is used for determining the evaporation in field conditions in Kahrizak Landfill in Tehran based on the container weight loss. A class A evaporation pan is also installed in the vicinity to determine evaporation from water surface. A correlation could be seen in the results and also a certain diminishing by time pattern in evaporation from the waste is also observed. A governing equation is also provided to calculate direct evaporation from waste using pan evaporation values. The correlation shows with acceptable precision with 0.5 mm day-1 error. A comparison also made with the previous researches in Germany shows higher values for maximum evaporation per day (8 mm day-1 instead of 5 mm day-1) and higher maximum possible values for evaporation (180 mm instead of 20 mm). The Current research shows that the evaporation can have a significant impact on the amount of leachate produced in the landfills in arid areas and implementing the current tool will lead to more efficient design of leachate treatment in landfills or better decision making for operation of landfills.

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