Please use this identifier to cite or link to this item: https://hdl.handle.net/11681/4258
Title: Laboratory and pilot plant evaluation of intermittent loading on small-scale extended aeration biological systems
Authors: United States. Assistant Secretary of the Army (R & D)
Environmental Effects Laboratory (U.S.)
Mahloch, Jerome L.
Averett, Daniel E.
Headstream, Marcia.
Keywords: Aeration
Biological properties
Mathematical models
Recreational facilities
Wastewater treatment
Sewage
Water purification
Water treatment
Recreation areas
Publisher: Environmental Effects Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: Technical report (U.S. Army Engineer Waterways Experiment Station) ; Y-77-4.
Description: Technical Report
Abstract: The U.S. Army Corps of Engineers is responsible for designing, constructing, and operating wastewater treatment systems for its recreational areas. The use of these areas by 391 million visitors in 1976 emphasizes the importance and significance of this responsibility. Reducing or eliminating the discharge of organic matter and suspended solids from recreational areas to receiving streams or lakes is of paramount importance in the protection of the environment and the maintenance of acceptable water quality. The importance attached to the production of a stable, high-quality effluent increases the priority to define the performance of a biological treatment system under intermittent loading conditions. The approach used in this study involved development of a mathematical model to predict the performance of a completely mixed activated sludge system under intermittent loading conditions, defined for this study as time-dependent hydraulic and organic loadings. The model was verified first with laboratory data from a bench-scale extended aeration system and then with field data from a prototype extended aeration package treatment plant. Parameters used in developing the study included effluent quality, dissolved oxygen uptake, and other performance indicators related to biomass response to intermittent loading conditions. Results of the laboratory phase of this study indicate that an extended aeration activated sludge system will generally perform satisfactorily under intermittent loading conditions. Biological evaluation of the laboratory systems subjected to intermittent loadings indicated that the animal populations within the reactor were chiefly responsible for the fluctuations in the performance of the system. Evaluation of the pilot system demonstrated that intermittent loadings would produce a failure in the solids handling system due to the hydraulic overload. Appendix A presents the mathematical model developed by this study. Appendix B describes the analytical test procedures, and Appendix C presents the raw data. NOTE: This.pdf file is large. Allow your browser several minutes to download the file.
URI: http://hdl.handle.net/11681/4258
Appears in Collections:Documents

Files in This Item:
File Description SizeFormat 
TR-Y-77-4.pdf29.39 MBAdobe PDFThumbnail
View/Open