Each component is described by an identical model, and the behavior of each component is a function of its physical properties only, i.e. physical dimensions, supply of substrates by flow from connected components and degree of mixing. There is a species of bacteria responsible for each major chemical reaction involved in the system. The bacteria are allowed to grow and establish themselves in layers where conditions are optimal for growth. Different species can also compete for substrate. With this mechanism, the system can automatically adjust the rates of chemical reactions as a function of time and space.
The following reactions are defined within the system:
