aerobic-anaerobic interface

aerobic-anaerobic interface

[e′rōb·ik ′an·ə‚rōb·ik ′in·tər‚fās]
(civil engineering)
That point in bacterial action in the body of a sewage sludge or compost heap where both aerobic and anaerobic microorganisms participate, and the decomposition of the material goes no further.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.