Respirator, measurement device and measuring method for measuring respiratory rate of biofilm

A respirator for measuring a respiratory rate of a biofilm, characterized in that, the respirator comprises a body (1), a carbon dioxide absorption tube (11) disposed in an interior of the body and at least one perforated partition (6) disposed in an interior of the body (1);

• the at least one perforated partition (6) divides the interior of the body (1) into an oxygen mass-transfer stir zone (8) and at least one biofilm reaction zone (3), the oxygen mass-transfer stir zone (8) is provided with a stirring device (7), the at least one biofilm reaction zone (3) is used for placing MBBR fillers (2);
• the carbon dioxide absorption tube (11) is provided with an air vent (10) and contains a solution, configured to absorb CO2 within the body (1);
• the at least one perforated partition (6) has a plurality of first holes and a second hole, the plurality of first holes is located at a middle portion and a lower portion of the at least one perforated partition (6) and defining a plurality of liquid-exchange channels (5), the second hole is located at an upper portion of the at least one perforated partition (6) and defining a gas-exchange channel (12), and the oxygen mass-transfer stir zone (8) is in communication with the at least one biofilm reaction zone (3) through the plurality of liquid-exchange channels (5) and the gas-exchange channel (12);
• a first opening and at least one second opening provided on the body, the first opening corresponds to the oxygen mass-transfer stir zone (8), the at least one second opening corresponds to the at least one biofilm reaction zone (3);
• and
• a headspace cap (9) coupled to the first opening and configured to seal the first opening, and at least one sealing cap (13) coupled to the at least one second opening and configured to seal the at least one second opening, and
• wherein the carbon dioxide absorption tube (11) is coupled to the headspace cap (9).