Demonstration of Compliance Monitoring for the MACT I "Hard Piping" Option, 1999 Environmental Conference Proceedings

Douglas A. Barton & Ward T. Dickens

NCASI

Carla L. Gay

Buckeye Technologies, Inc.

Research Associate

The 1998 MACT I Rule provides an option for kraft mills to control condensate HAP emissions through the use of biological treatment systems. This paper presents data describing experience with estimation of the fraction of inlet HAPS biodegraded during treatment. The procedures conducted during the study are similar to those which would comprise the Initial Performance Test required under the hard-piping option as understood at the time of the study. Methanol degradation efficiencies are presented for three mills, with calculations made assuming two different mixing conditions. All data sets indicate that greater than 92 percent of the inlet methanol is biodegraded during secondary treatment. The corresponding ranges of wastewater treatment plant (WTP) operating conditions are presented as are engineering assessment methods for expanding the range of WTP parameter values within which the required HAP destruction is achieved.