Year: 2011
Type: article
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 (50ºC).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/(m 3 .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 mgO 2 /(L.min) and 0.16 mgO 2 /(L.min) under thermophilic and mesophilic conditions, respectively.
Institutions: Sahand University of Technology, Tarbiat Modares University
Language: English
Subfield: Waste Management and Disposal
Field: Environmental Science
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2187967385