Details of talk
|Title||Modelling fermentation processes in the rumen|
|Presenter||Tammy Lynch (Massey University)|
|Author(s)||Dr Tammy Lynch|
|Session||Applied Mathematics/Industrial Mathematics|
Methane production from fermentation processes that occur in the rumen of animals such as cattle and sheep is one of the major sources of anthropogenic greenhouse gas emissions. Existing mathematical models that estimate this production are based largely on the calculation of hydrogen balances without considering the presence of methanogens, the microbes responsible for this production of methane. In this talk, we present a mechanistic mathematical model that depicts the interaction between the microbial populations in the rumen (glucose fermenters and methanogens), their feed substrates (glucose and hydrogen), and the end products of their fermentation processes (such as volatile fatty acids). Thermodynamic control of substrate concentrations on the rates of substrate metabolism and hydrogen and volatile fatty acid generation is included. This thermodynamic control allows for co-existence of microbes that use the same substrate but different fermentation pathways.