Wet gas scrubber

biological

The prin­ci­ple of bi­o­log­i­cal ex­haust gas clean­ing is based on mi­croor­gan­isms con­vert­ing the con­tents of ex­haust gas into harm­less prod­ucts. As the process al­ways has to take place in a more aque­ous phase than is avail­able in the mi­croor­gan­isms' habi­tat, the mi­croor­gan­isms are ei­ther grown in a film of mois­ture on a sub­strate or sus­pended in an aque­ous so­lu­tion. The mi­croor­gan­isms are aer­o­bic bac­te­ria that ox­i­dise the con­tents when oxy­gen is pre­sent. The degra­da­tion per­for­mance of the mi­cro-or­gan­isms is highly de­pen­dent on the en­vi­ron­men­tal con­di­tions: not only must enough oxy­gen and nu­tri­ents be avail­able, but the tem­per­a­ture, pH and mois­ture lev­els also have a key role to play. Un­like a bio-fil­ter, the ad­van­tage of a bio-scrub­ber is that it can con­trol mi­cro­bi­o­log­i­cal con­t­a­m­i­na­tion on the ex­change sur­face and keep this at a suf­fi­ciently low level.