Abstract
A mathematical biofilm model considering diffusion and decomposition of a single substrate was developed, and simplified approximate relationships between net removal rates and normalized biofilm parameters were obtained theoretically. Long term experiments on acetate treatment with methanogen attached biofilm reactors were carried out, and removal rates were analized by using the present model. Variations of biofilm parameters which specified treatment characteristics were represented as a function of the attached biomass. By using these parameters, treatment characteristics of methanogen attached biofilm reactors are simply and accurately evaluated.
