Abstract
Abstract Hydrogen sulfide (H2S) 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 H2S was removed from H2S loaded air. The optimum pH for this operation ranged from 6 to 7. The average specific uptake rate of H2S was obtained as 0.65 mmol S l−1 h−1 in a continuous up-flow. The moisture content was 65–90%, from bottom to top of the packed bed.
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