Patent Document ID: 10113194
Application ID: 14919694
Patent Flag: 1

Claim One:
1. A method comprising: (a) evaluating suitability of a test C1-containing substrate obtained from an industrial process for use in a biological conversion process comprising: (b) providing a gas testing unit, comprising: (i) a first bioreactor stage for evaluating the performance of a reference C1-containing substrate; (ii) a second bioreactor stage for evaluating the performance of the test C1-containing substrate; (iii) an analytical section configured for analysis of both gaseous and liquid products of the first and second bioreactors; wherein the gas testing unit is capable of being housed within a container having a volume of less than about 6 m 3 and transportable to multiple locations; (c) feeding the reference C1-containing substrate to the first bioreactor of the gas testing unit containing a first culture of a C1-fixing microorganism the first bioreactor operated at a set of target operating conditions; (d) feeding the test C1-containing substrate obtained from the industrial process to the second bioreactor of the gas testing unit containing a second culture of the C1-fixing microorganism, the second bioreactor operated at the same set of target conditions as the first bioreactor; (e) analyzing both gaseous and liquid products of the first and second bioreactors employing the analytical section of the gas testing unit to determine the performance of the first and second bioreactors; and (f) comparing the performance of the first bioreactor, relative to the performance of the second bioreactor to determine the suitability of the test C1-containing substrate obtained from the industrial source for use in a biological conversion process; the process characterized in that it is carried out at a site of the industrial process.