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Article: Treatment of mixed hydrogen sulfide and organic vapors in a rock medium biofilter
- Article from:
- Water Environment Research
- Article date:
- July 1, 2001
- Author:
CopyrightCopyright Water Environment Federation Jul/Aug 2001. Provided by ProQuest LLC. (Hide copyright information)
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ABSTRACT: A pilot-scale biofilter was operated at a publicly owned treatment works to remove hydrogen sulfide and a mixture of volatile organic compounds (VOCs) from waste gas streams. Lava rock was used for the medium, which averaged pH 4 during the study. The study itself was conducted in three phases. The bed volume was 9.8, 6.5, and 3.3 m^sup 3^ in phases 1, 2, and 3, respectively, while the flowrate was approximately 17 m^sup 3^/min throughout the study. The removal efficiency of hydrogen sulfide was consistently greater than 90% for all three phases and, despite low-pH conditions, weighted average VOC removal was greater than 70%. The lava rock provided a hospitable environment for ...