an open-ended air pipe terminating near the bottom of the tank. In warm weather, however, oxygen transfer efficiencies are reduced, and at temperatures approaching 15 AdC an additional oxygen demand from nitrification reactions is induced, and the open-ended pipe does not maintain satisfactory conditions. ... SYSTEM COSTS Although system costs were not the primary objective in initial development of the concept, which up to about 40 m3 are less expensive than steel or rigidanbsp;...
|Title||:||Permafrost: North American Contribution [to The] Second International Conference|
|Publisher||:||National Academies - 1973-01-01|