Author/Authors :
Safari، E نويسنده Department of Civil Engineering, Queen’s University, Ellis Hall, 58 University Avenue, Kingston, Ontario, K7L 3N6, Canada , , Jalili Ghazizade، M نويسنده Graduate Faculty of Environment, University of Tehran, P.O.B.14155-6135, Tehran, Iran , , Shokouh، A نويسنده Department of Civil and Environmental Engineering, Amirkabir Technical University, Tehran, Iran , , Nabi Bidhendi، Gh. R. نويسنده ,
Abstract :
High strength fresh leachates generated at a new disposal trench, compost plant and
partially stabilized leachate of an older trench were characterized in terms of anaerobic degradation
at laboratory batch scale at 35o
C. Fresh leachate had extremely high COD of 66,710 – 89,501 mg/L
along with low pH of 4.1-5.9 in contrast to older and therefore partially stabilized leachate with a COD
of about 19,000 mg/L and higher pH of 8.4. Filtration of fresh leachate samples showed to have
considerable effect on continuation of degradation as for the unfiltered samples, degradation nearly
stopped after a slight reduction in COD. As a first attempt, it was shown that a considerably better
fit was achieved for COD variations of filtered fresh leachate samples using first order multistage
kinetic model based on which hydrolysis was found to have the smallest rate, therefore being the
rate limiting stage in anaerobic degradation process.
