Category Contaminant transport (1D)
Publisher  CertainTech, Inc. 
Platform DOS
Status Commercial
Description BIO1D is a 1D finite difference model for simulation of biodegradation and sorption of a degradable hydrocarbon. Main features: advective and dispersive transport of substrate and oxygen; aerobic and anaerobic biodegradation; first-order decay; Linear, Freundlich, and Langmuir adsorption isotherms for substrate and oxygen; and Dirichlet, Neumann or Cauchy boundary condition modified to include an optional first-order decay. Aerobic biodegradation is simulated using modified Monod functions, and anaerobic biodegradation is represented using Michaelis-Menten kinetics. The resulting two coupled equations are approximated using finite differences, where the nonlinearities are treated using Newton-Raphson numerical procedure. It is assumed that the microbial mass is constant at the observed background density. The code is extensively verified using analytical solutions and numerical results from other studies. A preprocessor enables the user to prepare input data interactively. The user may run cases with different biodegradation and adsorption options, and compare results on screen. Cumulative mass balance charts are also displayed to show the contribution of the processes considered.
Cost US Dollars 250
Data formats supported None stated
Supplier in United States of America  CertainTech, Inc. 
Supplier in United States of America  International Ground Water Modeling Center 
Supplier in United States of America  Scientific Software Group 

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