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Showing papers on "Hydraulic retention time published in 1979"


Journal ArticleDOI
TL;DR: In this article, an optical device for introducing light to the activated algae process was used which, based on theoretical consideration, significantly increases the efficiency of light utilization by algae cultures, and was found to be the predominant mechanism for phosphorus removal.

36 citations


Book ChapterDOI
01 Jan 1979
TL;DR: In this article, the influence of process flow scheme (one to twelve stage CSTR aeration tank), hydraulic residence time, recycle rate and sludge age is discussed in small and large treatment plants with high and low diurnal load variations respectively.
Abstract: Dynamic simulation of the activated sludge process is used to predict nitrification performance. The influence of process flow scheme (one to twelve stage CSTR aeration tank), hydraulic residence time, recycle rate and sludge age is discussed in small and large treatment plants with high and low diurnal load variations respectively. Ammonium load equilibration, recycle flow rate and variation of process configuration between contact stabilization, step feed and plug flow type processes are discussed as process control parameters. Results indicate trends for process preformance and should be applicable for a wide variety of process situations.

13 citations