The generated bioaerosol was sampled a the scheduled time
points by connecting a Biosampler (SKC Inc., USA) to the reactor,
containing 50 mL of a 0.6% NaCl solution added prior to sampling.
The exhaust gas sampling was carried out for 30 min to yield a
sample volume 70 L. After sampling, the volumes of the solutions
were measured to evaluate evaporative loss and the solutions were
kept in a thermostat-controlled cold box until measurement of
airborne bacteria or endotoxin. For the measurement of airborne