Removal of hydrogen sulfide by the compost biofilter with sludge of leather industry

摘要

Hydrogen sulfide (H sub(2)S) was efficiently removed from contaminated air by a pilot-scale compost biofilter. Sludge from the leather industry was inoculated into spent mushroom compost, mixed with grounded snail shell (GSS) (shell:compost, 1:5) which was used for buffering bed against pH decline, during the operation. More than 99% of H sub(2)S was removed from H sub(2)S loaded air. The optimum pH for this operation ranged from 6 to 7. The average specific uptake rate of H sub(2)S was obtained as 0.65 mmol S l super(-1) h super(-1) in a continuous up-flow. The moisture content was 65-90%, from bottom to top of the packed bed.