| 摘要 |
An apparatus for the determination of Biological oxygen demand (BOD) of a sample, comprises: (a) a digester, for receiving the sample 8; (b) a CO2 absorption unit 10, for removing CO2 produced during digestion; (c) a gas release valve arranged to release an oxygen containing gas through a liquid into the digester in response to a reduction in pressure in the digester; and (d) a gas flow measuring device 5, for measuring the flow of oxygen through the gas release valve. Absorption of CO2 by the CO2 absorption unit decreases the pressure within the digester, causing inflow of gas through the gas release valve which is measured by the gas flow measuring device to determine the BOD of the sample. A device for use with a gas flow measuring system having a gas release valve arranged to open and thereby release biogas into a liquid reservoir, comprises a housing defining a chamber and having an inlet and an outlet. The housing is submergible in the liquid reservoir, and the inlet is configured to receive the gas release valve and the outlet is arranged above the inlet and is configured for connection to a digester. |
