Removal of Volatile Organic Compounds at Extreme Shock-Loading Using a Scaled-Up Pilot Rotating Drum Biofilter

A pilot-scale rotating drum biofilter (RDB), which is a novel biofilter design that offers flexible flow-through configurations, was used to treat complex and variable volatile organic compound (VOC) emissions, including shock loadings, emanating from paint drying operations at an Army ammunition pl...

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Bibliographic Details
Published in:	Journal of the Air & Waste Management Association (1995) 2008-11, Vol.58 (11), p.1407-1414
Main Authors:	Sawvel, Russell A., Kim, Byung, Alvarez, Pedro J.J.
Format:	Article
Language:	eng
Subjects:	Acid rain Air Pollutants, Occupational - analysis Air Pollution - analysis Applied sciences Atmospheric pollution Bioelectric Energy Sources Biofiltration Biological and medical sciences Biotechnology Chemical engineering Chemical oxygen demand Clean Air Act-US Design and construction Efficiency Engineering research Environmental aspects Environmental impact Environmental science Equipment and supplies Exact sciences and technology Filters (Separation) Fundamental and applied biological sciences. Psychology Gas flow Gasoline - analysis General purification processes Hazardous air pollutants Industry Methods. Procedures. Technologies Others Pollution Pollution control Quality Control Reactors Temperature Trade secrets Various methods and equipments Vehicle Emissions - analysis VOCs Volatile organic compounds Wastewaters Water treatment and pollution
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Summary:	A pilot-scale rotating drum biofilter (RDB), which is a novel biofilter design that offers flexible flow-through configurations, was used to treat complex and variable volatile organic compound (VOC) emissions, including shock loadings, emanating from paint drying operations at an Army ammunition plant. The RDB was seeded with municipal wastewater activated sludge. Removal efficiencies up to 86% and an elimination capacity of 5.3 g chemical oxygen demand (COD) m −3 · hr −1 were achieved at a filter-medium contact time of 60 sec. Efficiency increased at higher temperatures that promote higher biological activity, and decreased at lower pH, which dropped down to pH 5.5 possibly as a result of carbon dioxide and volatile fatty acid production and ammonia consumption during VOC degradation. In comparison, other studies have shown that a bench-scale RDB could achieve a removal efficiency of 95% and elimination capacity of 331 g COD m −3 · hr −1 . Sustainable performance of the pilot-scale RDB was challenged by the intermittent nature of painting operations, which typically resulted in 3-day long shutdown periods when bacteria were not fed. This challenge was overcome by adding sucrose (2 g/L weekly) as an auxiliary substrate to sustain metabolic activity during shutdown periods.
ISSN:	1096-2247 2162-2906