Bio-methane potential test (BMP) using inert gas sampling bags with macroalgae feedstock

where X1 = daily calculated headspace methane volume, X2 = daily measured volume of methane in gas bags, X3 = previous day headspace methane volume. An advantage of this approach is the volumetric measurement of gas produced directly from the gas bags, hence it does not require liquid displacement or pressure transducers. Results from a second set of freshly collected sample seaweed sample showed it was in agreement with published BMP values. All analysis were carried out without mineral supplementation.