use both together - simple vacuum filtration is done still under gravity. check your sizes as chemisttree says.
PS vacuum caused by nonflammable solvents will work (try water). Dichloromethane as solvent will work
well.
Use zinc oxide. the reaction of sulfur and zinc forms more stable znS. Pump your waste gas of H2S over znoxide surface. if conc too high then you need to bubble through solution of zinc (zinc chloride etc.)