|
Iranian Journal of Environmental Health, Science and Engineering
Iranian Association of Environmental Health (IAEH)
ISSN: 1735-1979
Vol. 8, No. 1, 2011, pp. 3-14
|
Bioline Code: se11001
Full paper language: English
Document type: Research Article
Document available free of charge
|
|
Iranian Journal of Environmental Health, Science and Engineering, Vol. 8, No. 1, 2011, pp. 3-14
en |
Aerobic Thermophilic Treatment of Landfill Leachate in a Moving-Bed Biofilm Bioreactor
Hajipour, A.; Moghadam, N.; Nosrati, M. & Shojaosadati, S.A.
Abstract
In the present study the landfill leachate obtained from Tabriz Landfill site was first treated in a suspended growth activated sludge bioreactor which then was turned to a moving-bed biofilm bioreactor under thermophilic conditions (50° C). The average Soluble Chemical Oxygen Demand (SCOD) removal ranged from 70% to 62% as Organic Loading Rate (OLR) increased from 0.454 to 4.678 kgCOD/(m3.d). Hydraulic Retention Time (HRT) values were set to 12, 14, 16.8, and 21 h. The recycle ratio of biomass ranged from 1 to 1.5. The total biomass concentration was in the range of 2600-3100 mg/L of which 60-65 percent was in the form of biofilm. It was COD removal efficiency was 5% to 10% higher in moving-bed biofilm operation compared to suspended growth one at the same OLR and HRT. Respirometry experiments revealed that readily biodegradable organic compounds accounted for 5.7% and 5.2% of substrate under thermophilic and mesophilic conditions, respectively. The maximum resulting oxygen uptake rates were 0.21 mgO2/(L.min) and 0.16 mgO2/(L.min) under thermophilic and mesophilic conditions, respectively.
Keywords
Landfill leachate; Thermophilic; Aerobic; Moving bed biofilm bioreactor
|
|
© Copyright 2011- Iranian Journal of Environmemtal Health, Science and Engineering Alternative site location: http://diglib.tums.ac.ir/pub/
|
|