| 초록 |
Packaging Corporation of America(PCA) operates a mill in Tomahawk, Wisconsin that presently uses a large anaerobic lagoon system to treat its wastewater. Concern has arisen, primarily on the part of the EPA, regarding introduction of methanol containing condensate into the treatment system, specifically anaerobic digester. The concern centers on the anaerobic biodegradability of methanol and by-products and potential stripping from the system. More than 99% of methamol existing in condensate was biodegraded during anaerobic digestion. By products from methanol degradation such as acetaldehyde and methyl ethyl ketone were degraded completely in 32 hours. Since the PCA anaerobic anaerobic digester has the detention time of 5 days, condensate by-products are thought to be completely biodegraded. |
