1 AIT Asian Institute of Technology

Fluidized-bed anaerobic digestion

AuthorSubhakar, D.
Call NumberAIT SSPR no. ET-83-2
Subject(s)Fluidization
NoteA special study (3 credits) submitted in partial fulfillment of the requirement for the degree of Master of Engineering, School of Environment, Resources and Development
PublisherAsian Institute of Technology
AbstractFluidized bed anaerobic digestion is one of the recent developments in the stabilization of wastes. This is suitable for the treatment of low strength organic wastes anaerobically, at reduced temperatures, at short retention times and at high organic loading rates. Many parameters are identified to affect the performance of FBAR. They are temperature, pH, hydraulic retention time, organic loading rate, influent substrate concentration, support particle size, biofilm thickness, superficial fluid velocity etc. A mathematical model is developed using Monod kinetics and diffusional properties of the substrate into the biofilm to predict the substrate concentration in the FBAR. This model assumes that the biofilm is in steady state and thin. From this model it is concluded that RRT, particle size and the influent substrate concentration are the important parameters affecting the substrate utilization rate. This model is tested for a continuous FBAR and found to be fitting. Chicken waste is used as a feed in the FBAR. During the experiments made, it is found that nozzle type of distributor is suitable for chicken waste. Sand is used as support media. But steady state gas production could not be achieved within a reasonable period of time.
Year1983
TypeSpecial Study Project Report (SSPR)
SchoolSchool of Environment, Resources, and Development
DepartmentDepartment of Energy and Climate Change (Former title: Department of Energy, Environment, and Climate Change (DEECC))
Academic Program/FoSEnergy Technology (ET)
Chairperson(s)Bhattacharya, Sribas C.
Examination Committee(s)Prida Wibulswas ; Stahl, Gunter
Scholarship Donor(s)Government of Australia
DegreeSpecial Studies Project Report (M. Eng.) - Asian Institute of Technology, 1983


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