Reduction of ammonia and volatile organic compounds from food waste-composting facilities using a novel anti-clogging biofilter system |
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Authors: | Ryu Hee Wook Cho Kyung-Suk Lee Tae-Ho |
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Institution: | a Department of Chemical Engineering, Soongsil University, Seoul 156-743, Republic of Korea b Department of Environmental Science and Engineering, Ewha Womans University, Seoul 120-750, Republic of Korea c Biosaint Company, Ahnyangsi, Kyunggi-do 120-750, Republic of Korea |
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Abstract: | The performance of a pilot-scale anti-clogging biofilter system (ABS) was evaluated over a period of 125 days for treating ammonia and volatile organic compounds emitted from a full-scale food waste-composting facility. The pilot-scale ABS was designed to intermittently and automatically remove excess biomass using an agitator. When the pressure drop in the polyurethane filter bed was increased to a set point (50 mm H2O m−1), due to excess biomass acclimation, the agitator automatically worked by the differential pressure switch, without biofilter shutdown. A high removal efficiency (97-99%) was stably maintained for the 125 days after an acclimation period of 1 week, even thought the inlet gas concentrations fluctuated from 0.16 to 0.55 g m−3. Due the intermittent automatic agitation of the filter bed, the biomass concentration and pressure drop in the biofilter were maintained within the ranges of 1.1-2.0 g-DCW g PU−1 and below 50 mm H2O m−1, respectively. |
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Keywords: | Biofilter Anti-Clogging Agitation Ammonia Volatile organic compounds |
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