||Treatment of Aqueous Agricultural Wastes for Clean Water and for Microbial Protein Production.
Tsa, G. T. ;
||Iowa State Univ., Ames. Engineering Research Inst.
||ISU-ERI-AMES-99959 ;ISWRRI-33; DI-14-31-0001-3215; ERI-754-A ;OWRR-A-032-IA; 08661,; A-032-IA(6)
( Water pollution ;
Dairy products) ;
( Food processing ;
Water pollution) ;
( Industrial waste treatment ;
Food processing) ;
Biochemical oxygen demand ;
Water pollution control equipment ;
Waldhof aerators ;
Saccharomyces fragiles ;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
Cheese whey containing 35,000 ppm BOD is the most concentrated liquid waste that can be found in large quantities. It foams excessively when bubbled with gas. Cheese whey was successfully treated in a Waldhof aerator by Saccharomyces fragilis. This yeast can reduce about 85% of the BOD and produce single cell protein. A batch as well as a continuous growth process of this yeast was successfully developed. A fundamental study on the transient and steady state behavior of cell growth was also conducted. Through computer simulation, it was possible to predict growth pattern in batch and continuous processes. A sysmetical study on the working mechanisms of a Waldhof aerator was conducted. Foam fractionation of the yeast and other microbiological cells was also studied. Foam decay was found to follow a second-order rate pattern. A theoretical investigation was conducted on gas-liquid interfacial oxygen absorption. The effect of viable microbiological cells that consume the transferring solute on the rate of oxygen absorption was analyzed. (Author)