Since the early 1970s, air pollution control regulations have required many businesses to install emission control systems to destroy volatile organic compounds (VOCs) and/or hazardous air pollutants (HAPs), or face fines. With recent emphasis by President Obama on climate change and State of California's attempt to reduce emissions of greenhouse gases, such as carbon dioxide, there is growing interest in applying bacteria-based technologies, such as biofiltration, for treatment of odors, VOCs and HAPs. While thermal oxidizers have been widely used in the past to treat such emissions, in recent years, with the increasing price of natural gas and concerns about carbon footprint, biological treatment has emerged as an effective, economical strategy to meet the regulations.
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