Dual Roles of Clay Contents on Landfill Leachate Treatment and their Soils Carbon Sequestration

Abstract

To verify hypothesis on dual roles of clay contents on landfill leachate treatment and their soils
carbon sequestration was carried out by split plot design. The water samples were collected from two
sources which were landfill leachate (LFL) and tap water (blank). Two sets of indoor incubation of soils
saturated at 1, 2, 4, 8 and 16 weeks of prolonged aging periods. The results and conclusion found that
(a) Treatment of the landfill leachate –C occurs since the first week and complete in 4 weeks of the
experiment; (b) The appropriate ratio of clay contents to coarse sand was 3:1 because it made balance
amount will be both an electron acceptor and macropores to promote the organic carbon degradation of
facultative anaerobes processes, soil aggregate granulation and humus formation; and (c) Applied
soil carbon sequestration system had the potential both the organic degradation and soil carbon sequestration furthermore this system is low cost, therefore, application of wastewater treatment system
should be to be used to solve leachate problems in Thailand