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Filtering by: Creator Grabe, Don F. Remove constraint Creator: Grabe, Don F. Decade 1960-1969 Remove constraint Decade: 1960-1969

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  • The effect of selected insecticides upon biochemical oxidation

    Creator:
    Norris, Francis Warren, Jr.
    Abstract:
    A study to determine the effect of certain synthetic organic insecticides on the Biochemical Oxygen Demand (BOD) Test was performed. BOD tests on a standard glucose-glutamic acid substrate were conducted while in the presence of dieldrin, dichlorodiphenyltrichloroethane (DDT), or diazinon. From the BOD data, the following parameters were obtained: 1....
    Resource Type:
    Masters Thesis
    Full Text:
    Typed by Marion F. Palmateer ACKNOWLEDGMENTS The writer wishes to express his appreciation to the

  • Kinetics of biological contact beds

    Creator:
    Seaders, John
    Abstract:
    The influence of media size upon the effective removal of organic waste from a liquid substrate was studied by the use of three experimental trickling filters under a set of uniform operating conditions. The range of experiments involved hydraulic loadings of increasing magnitude and of constant organic strength. The trickling...
    Resource Type:
    Masters Thesis
    Full Text:
    levels. (20, 21, 22) EQUIPMENT AND METHODS Equipment Three trickling f ilter of 5.8 -inch diameter

  • Aircraft washrack wastes : their characteristics and treatment

    Creator:
    Evans, David Roland
    Abstract:
    Oils, greases, and grit which collect on an aircraft during flight are removed on the U. S. Air Force washracks using an alkaline, water-base cleaner. Waste-flows from these washracks may include in addition to free oils, emulsified oils, and alkaline, water-base cleaners several other constituents such as acid skin brightners,...
    Resource Type:
    Masters Thesis
    Full Text:
    ; Major Ream and Don Hill, Portland base engineering office for their very important help in getting the

  • An investigation of alternative means of achieving water quality objectives

    Creator:
    Kerri, Kenneth Donald
    Abstract:
    Storage of water for water quality control is one of the alternative means of achieving water quality objectives. Authorities in the field of water quality management disagree regarding the use of precious water for the dilution of wastes. The costs of achieving water quality objectives by treatment of wastes at...
    Resource Type:
    Dissertation
    Full Text:
    ? ;:'_ I /'I 2e, 1/IO11 , %---...,--_, dd wbn3 ! ó1191)09 7381 1 dd . vw f 39 ? 0/al l aJl39

  • An evaluation of variables affecting the virus removal capabilities of the coagulation-filtration process

    Creator:
    Chapman, Robert Lyle
    Abstract:
    The capabilities of the coagulation-filtration process for virus removal were evaluated by constructing and operating a one step, 2 gpm coagulation-filtration pilot plant. Multi-media filters were used without pre-coagulation and sedimentation. A T2 bacteriophage was used as the indicator organism. The plant was operated under a variety of conditions in...
    Resource Type:
    Masters Thesis
    Full Text:
    Redacted for Privacy Dean of Graduate School Date thesis is presented /t/»/ Typed by Marion F

  • The effect of elevated pressure on the activated sludge process

    Creator:
    Godsil, Patrick James
    Abstract:
    A study of the effect of elevated pressure on the activated sludge waste treatment process is presented. The method of study involved a comparison of two laboratory, batch type, activated sludge units. One unit was operated at atmospheric pressure as a base control and the other operated at elevated pressures...
    Resource Type:
    Masters Thesis
    Full Text:
    . Control and test aeration chambers Figure 3. Experimental Apparatus. f L ple lí t 4-7 - o

  • Contact time and reaction rates for trickling filters

    Creator:
    Roach, Michael Dan
    Abstract:
    Three deep experimental filters were used to evaluate the influence of the physical factors of media size, depth of filter, and organic and hydraulic loading on contact time and the rate of removal of organic material by the biological growth on the filters. A further correlation was made between contact...
    Resource Type:
    Masters Thesis
    Full Text:
    filters - laboratory units. Figure 2. Typical sample ports for filter units. Ja °4I f te

  • The fate of specific organisms in a receiving stream

    Creator:
    Henshaw, Thomas Lamond
    Abstract:
    One of the major items in any program of municipal sanitation is the double problem of water supply and waste water disposal. Since streams are the general source of water supply and also the final receptacle for sewage, this dual use of the stream often leads to complications. Sewage and...
    Resource Type:
    Masters Thesis
    Full Text:
    except for the total f //,4 i, / trp3 counts, which were obtained using the standard pour -plate

  • The effects of clipping on the vigor of big game browse plants and related studies in the Arizona chaparrel

    Creator:
    Neff, Don J.
    Abstract:
    A five-year clipping experiment was conducted to determine maximum sustained utilization levels for three big game browse plant species in central Arizona. The three species were mountain-mahogany (Cercocarpus breviflorus) and desert ceanothus (Ceanothus Greggii) in the chaparral type, and cliff-rose (Cowania mexicana var. Stensburiana) in the pinyon-juniper type. Experimental treatments...
    Resource Type:
    Dissertation
    Full Text:
    plants and related studies in the Arizona chaparral AN ABSTRACT OF THE THESIS OF Don Johnson Neff for

  • The effect of gibberellic acid on the growth, metabolic products and antineoplastic alkaloids of Catharanthus roseus (L.) G. Don

    Creator:
    Masoud, Asaad Nashed
    Abstract:
    In view of the stimulant effects of gibberellic acid on plant growth, and its interesting modifications of various metabolic products, it was decided to determine whether this growth regulator would induce a favorable effect on total alkaloid production, especially on the antineoplastic alkaloids, of Catharanthus roseus (L.) G. Don (Vinca...
    Resource Type:
    Dissertation
    Full Text:
    : Genus: Alstonieae Catharanthinae Catharanthus G. Don Section 1. Lochnera (Reichb. f. ) Pick