Showing papers by "United States Environmental Protection Agency published in 1970"
3 citations
Patent•
13 May 1970TL;DR: In this paper, the authors present a procedure for removing 80% or more of the weight of the DIGESTER SUPERNATANT LIQUOR from the ConvENTIONAL SEWAGE SLUDGE DIGESTION PROCESS.
Abstract: PROCESS FOR REMOVAL OF 80 WEIGHT PERCENT OR MORE OF THE TOTAL PHOSPHORUS OF DIGESTER SUPERNATANT LIQUOR FROM THE CONVENTIONAL SEWAGE SLUDGE DIGESTION PROCESS COMPRISING HEATING THE DIGESTER SUPERNATANT LIQUOR FOR AT LEAST ABOUT 5 MINUTES AT A TEMPPERATURE IN THE RANGE OF FROM ABOUT 40* CENTIGRADE TO ABOUT 80* CENTIGRADE AT AMBIENT PRESSURE OR BELOW AMIBENT PRESSURE WHEN THE TEMPERATURE IS ABOUT 55* CENTIGRADE OR HIGHER AND IN THE RANGE OF FROM ABOUT 28 INCHES OF MERCURY (ABSOLUTE) OR BELOW WHEN THE TEMPERATURE IS BELOW ABOUT 55* CENTIGRADE; AND THEN SEPARTING PRECIPITED SOLIDS. THE PROCESS ALSO RESULTS IN SUBSTANTIAL REDUCTION OF TOTAL NITROGEN, CHEMICAL OXYGEN DEMAND AND BIOLOGICAL OXYGEN DEMAND OF THE DIGESTER SUPERNATANT LIQUOR.
1 citations
TL;DR: This manuscript presents a theoretical study of fluid dynamics in diseased lungs to describe fluid behavior and assist in the development of new techniques for targeted delivery of drugs.
Abstract: This manuscript presents a theoretical study of fluid dynamics in diseased lungs. The objective was to describe fluid behavior and assist in the development of new techniques for targeted delivery of drugs. Numerical simulations were conducted using FIDAP on the Cray T90 supercomputer. Two lung bifurcations with tumors in tracheobronchial airways were considered. Weibel [1] lung morphology and Hofmann et al. [2] breathing parameters were employed. It has been observed that the effects of tumor size, rather than breathing conditions, dominate localized flow patterns around a tumor.