1. ERDC Knowledge Core
  2. Pre - Engineer Research and Development Center (ERDC)
  3. Environmental Effects Laboratory - (9/20/1974 - 4/16/1978)
  4. Publication
  5. Technical Report
Please use this identifier to cite or link to this item: https://hdl.handle.net/11681/4258
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dc.contributor.authorMahloch, Jerome L.en_US
dc.contributor.authorAverett, Daniel E.en_US
dc.contributor.authorHeadstream, Marcia.en_US
dc.creatorEnvironmental Effects Laboratory (U.S. Army Engineer Waterways Experiment Station)en_US
dc.date.accessioned2016-03-16T17:10:27Zen_US
dc.date.available2016-03-16T17:10:27Zen_US
dc.date.issued1977-09en_US
dc.identifier.govdocTechnical Report Y-77-4en_US
dc.identifier.urihttp://hdl.handle.net/11681/4258en_US
dc.descriptionTechnical Reporten_US
dc.description.abstractThe 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.en_US
dc.description.sponsorshipUnited States. Office of the Assistant Secretary of the Army for Acquisition, Logistics, and Technologyen_US
dc.description.tableofcontentsPREFACE...................2 CONVERSION FACTORS, METRIC (SI) TO U. S. CUSTOMARY AND U. S. CUSTOMARY TO METRIC ( SI) UNITS OF MEASUREMENT...................4 PART I : INTRODUCTION...................5 Background...................5 Purpose...................7 Technical Approach...................7 PART II: LITERATURE REVIEW...................9 Activated Sludge...................9 Extended Aeration...................11 Shock Loading Studies...................13 PART III: MODEL DEVELOPMENT...................17 PART IV : EXTENDED AERATION SYSTEMS...................19 Experimental Laboratory Extended Aeration System...................19 Pilot Plant Extended Aeration System...................24 PART V: RESULTS AND DISCUSSION...................30 Laboratory Extended Aeration System: Phase 1...................30 Laboratory Extended Aeration System: Phase 2...................41 Extended Aeration Pilot Plant...................43 PART VI : CONCLUSIONS AND RECOMMENDATIONS...................50 Conclusions...................50 Recommendations...................50 REFERENCES...................52 TABLES 1- 16 APPENDIX A: ASMODEL DESCRIPTION...................A1 Model Tasks...................A1 Program Input and Execution (Task 1 )...................A1 Program Operation...................A3 TABLES Al and A2 APPENDIX B: ANALYTICAL TEST PROCEDURES...................B1 APPENDIX C : RAW DATA...................C1 TABLES Cl-Cl8en_US
dc.format.extent100 pages/28.7 MBsen_US
dc.format.mediumPDFen_US
dc.language.isoen_USen_US
dc.publisherU.S. Army Engineer Waterways Experiment Stationen_US
dc.relationhttp://acwc.sdp.sirsi.net/client/en_US/search/asset/1041170en_US
dc.relation.ispartofseriesTechnical Report (Environmental Effects Laboratory (U.S. Army Engineer Waterways Experiment Station)) ; no. Y-77-4en_US
dc.rightsApproved for public release; distribution is unlimiteden_US
dc.sourceThe ERDC Library created this digital resource using one or more of the following: Zeta TS-0995, Zeutcehl OS 12000, HP HD Pro 42-in. map scanner, Epson flatbeden_US
dc.subjectAerationen_US
dc.subjectBiological propertiesen_US
dc.subjectMathematical modelsen_US
dc.subjectRecreational facilitiesen_US
dc.subjectWastewater treatmenten_US
dc.subjectSewageen_US
dc.subjectWater purificationen_US
dc.subjectWater treatmenten_US
dc.subjectRecreation areasen_US
dc.titleLaboratory and pilot plant evaluation of intermittent loading on small-scale extended aeration biological systemsen_US
dc.typeReporten_US
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