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| Performance evaluation of a biofilter treating hydrogen sulfide waste gas with high load in intermittent mode under low temperature |
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Abstract Performance of biological removal of hydrogen sulfide waste gas in a biofilter packed with the mixtures of chicken manure and polyethylene (PE) was investigated under low temperature. The experiment was carried out in intermittent mode. The removal efficiencies were 100%, 100%, 100% and 65% with inlet concentration of 3000 mg/m3 and the EBRT of 38s, 32s, 23s and 13 s respectively. The elimination capacity reached to 812g/(m3·h) with inlet load of 528g/(m3·h). Under the condition of low temperature from 9℃ to 16.5℃, H2S removal efficiency achieved 100% with inlet concentration of 50~3000mg/m3 and EBRT of 38s, 32s and 23s. At EBRT of 13s, the removal efficiency could reach to 62%~88%. The results showed that a good performance of the biofilter was obtained with high inlet load and gas velocity under low temperature.
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Received: 10 October 2011
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