The emissions from a rotary dryer processing distillers dried grains (DDG) with solubles at an ethanol plant needed treatment to comply with Environmental Protection Agency regulations, so the plant's operator turned to Pro-Environmental Inc., Rancho Cucamonga, Calif., for a regenerative thermal oxidizer (RTO) to do the job.
According to Pro-Environmental, the application presented three special challenges during the oxidizer design due to the nature of the exhaust. The exhaust:
- Varied constantly and had very low oxygen content.
- Had high moisture content with corrosive compounds.
- Had high required destruction efficiency.
The unit was installed and started up on schedule. Performance testing was conducted a few weeks after the equipment was fully operational, and the system met or exceeded EPA standards, according to Pro-Environmental.
Contact Pro-Environmental at (909) 989-3010 or www.pro-env.com.
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