Aerobic Waste Treatment Research Articles

Ester synthesis by Zoogloea ramigera 115 grown in the presence of ethanol.

The ester ethyl butyrate is produced by Zoogloea ramigera 115, a bacterium isolated from an aerobic waste treatment plant, when ethanol is present in culture media. The cells appear to produce butyric acid which is then esterified with residual ethanol in the culture medium.

Ester Synthesis by Zoogloea ramigera 115 Grown in the Presence of Ethanol

The ester ethyl butyrate is produced by Zoogloea ramigera 115, a bacterium isolated from an aerobic waste treatment plant, when ethanol is present in culture media. The cells appear to produce butyric acid which is then esterified with residual ethanol in the culture medium.

"Loading velocity" in aerobic biological waste treatment systems.

"Loading velocity" in aerobic biological waste treatment systems.

Physical rate processes in aerobic biological waste treatment

Physical rate processes in aerobic biological waste treatment

Use of residence time distributions for design of aerobic waste treatment units

Abstract This paper deals with a relatively new design method which may be useful for waste treatment installations. A residence time distribution (RTD) for the vessel or tank under consideration and an expression for degree of conversion or removal as a function of time are needed to employ this method.

Nematodes in an Aerobic Waste Treatment Plant

The objective of this study was to evaluate aerobic waste treatment plants as breeding sites for nematodes and to locate the unit processes and operations favorable for such breeding. The Urbana‐ Champaign (Illinois) Sanitary District waste treatment plant was chosen for this study. This plant uses the two processes, trickling‐filter and activated‐ sludge units, to treat the same domestic waste. This arrangement made possible a comparative evaluation of these two processes as nematode breeding sites. Furthermore, previous studies of the origin of the nematode population found in the Boneyard‐Saline Branch Drainage System were of assistance in estimating the relative contribution of nematodes discharged by the treatment plant. The nematode population at various locations within the treatment plant was monitored weekly from September 1962 to mid‐ September 1963.