Fig. 5From: Enhancement of using combined packing materials on the removal of mixed sulfur compounds in a biotrickling filter and analysis of microbial communitiesSchematic diagram of the biotrickling filters (1) H2S cylinder, (2) mixing chamber, (3) syringe pump, (4) air compressor, (5 and 6) gas flowmeter, (7) NaOH dosing pump, (8 and 9) nutrient tank, (10 and 11) pH probe, (12 and 13) peristaltic pump, (14–19) filter material sampling portsBack to article page