How to measure the gas production of UASB
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The UASB used for experiments is about 3L in size, and it produces very little gas – how can this be measured?
Theoretically, for every 1 kg of COD removed, 0.35 m3 of pure methane gas can be produced (at 0°C and 1.013×105 Pa). The biogas produced is generally assumed to contain 65% methane.
Theoretically, that’s the case, but the gas production volume is an indicator of sludge activity and reactor efficiency, right? So how can the actual gas production volume be measured? It’s difficult to make measurements because the volume is small; I was wondering if there’s any simple way to do it? This post was last edited by sunny_1234119 on 2009-2-18 09:06.]
As stated on the second floor regarding theoretical calculations, as for how to determine this, one method is to install a rotameter. Secondly, the gas can be collected in a vacuumed container, its pressure measured, and from that the total volume calculated.