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Showing 1 to 20 of 293 for “"Oxygen demand"”.
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Sediment Oxygen Demand Kinetics
Hypolimnetic oxygen diffusers increase sediment oxygen demand (SOD) and, if not accounted for in design, can further exacerbate anoxic conditions. A study using extracted sediment cores, that included both field and laboratory experiments, was performed to investigate SOD kinetics in Carvin's Cove …
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Measurement of sediment oxygen demand in a created urban wetland
Studies were conducted to determine the sediment oxygen demand (SOD) of a created urban wetland, the cause of differences between SOD methods, and the effect of temperature on the rate of exertion of SOD. <i>In situ</i>, laboratory tank, and laboratory core methods were employed to measure the SOD. …
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The effect of agitation on the biochemical oxygen demand sewage
… what effect agitation had upon the biochemical oxygen demand of sewage. In order to determine the effect of agitation, the composition of the sewage, the seed source, the temperature and the dilutions were held constant.
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Manual and Automated Measurement of the Chemical Oxygen Demand (COD) of Wastewaters
… in the United Kingdom and the usefulness of oxygen demand tests to measure the organic pollution is outlined. Because oxyeen demand tests are arbitary the relative merits and shortcomings of the commonly used tests are discussed, as are some new techniques for measuring organic pollution.The …
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A Probabilistic Analysis of Dissolved Oxygen-Biochemical Oxygen Demand Relationship in Streams
Made available in DSpace on 2014-12-08T23:57:08Z (GMT). No. of bitstreams: 1 6901374.pdf: 5253573 bytes, checksum: 7904012f6d198abd64683c7d8be5e73e (MD5) Previous issue date: 1968
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Correlation of biochemical oxygen demand with oxidation-reduction potential of settled sewage
… between the O-R potential and the biochemical oxygen demand of settled sewage. The source of the samples was the effluent end of the primary clarifier at the V.P.I. Sewage Disposal Plant. The investigation consisted essentially of performing the standard biochemical oxygen demand determination …
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Manometric determination of the biochemical oxygen demand of sulfite paper mill wastes
… determined by manometric measurement of the free oxygen utilized. In either case, the B.O.D. determination requires at least 24 hours. Since the free oxygen involved in the B.O.D. of a waste is utilized in metabolic processes of various microorganisms present, an increase in the number of …
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Biochemical oxygen demand reduction of semi-chemical neutral sulfite waste by heat hydrolysis
… (2) if pH, dilution and the addition of oxygen were factors that affected the reduction of B.O.D. These factors were determined by adjusting the raw liquor to the desired concentration and cooking the liquor in a closed container until certain conditions were obtained, namely, that of …
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Statistical Evaluation of Rapid Biochemical Oxygen Demand Test for Monitoring Municipal Wastewater Quality
… wastewater quality include the 5-day biochemical oxygen demand (BOD5) and carbonaceous BOD (CBOD5). This thesis presents an alternative wastewater quality test that requires much less time to achieve valid results. This research addresses the precision and statistical validity of an alternative …
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Seasonal variability of sediment oxygen demand and biogeochemistry on the Namibian inner shelf
… is one of the main areas of formation of low oxygen water (LOW) in the Benguela upwelling system. Local biogeochemical remineralization of organic matter mostly related to the primary production in surface waters (Chapman and Shannon, 1985) is thought to drive seasonal variability in sediment …
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Role of sediment oxygen demand on the oxygen balance in the North Shore Channel of Chicago
When dissolved oxygen (DO) levels fall below a certain point, fish and wildlife are at risk. While many factors contribute directly to the oxygen sink, sediment oxygen demand (SOD) is suspected of being a significant factor along slower-moving channels with substantial organic sediment …
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A laboratory study of reduction of the biochemical oxygen demand of synthetic sewage by Zoogloea ramigera
In order to improve the design and to control satisfactorily the operation of the modern sewage disposal and industrial waste treatment plants, a great deal of work remains to be done by competent sanitary engineers, biologists, and chemists. It is the general belief that the stabilization of …
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A model-based approach for the development of a bioelectrochemical sensor for biochemical oxygen demand in wastewater
… remote sensors, and as sensors for biochemical oxygen demand or volatile fatty acids. After introducing bioelectrochemical systems and the basic principles and mechanisms of their operation, this thesis will focus on a model-based approach to developing a sensor based on a microbial electrolysis …
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Development of sediment oxygen demand predictive model by characterization of oxygen mass transfer at sediment-water interface
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2026-12-01
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Application of the manometric technique to a study of the biochemical oxygen demand of a neutralized acid waste
The purpose of this investigation was to use the manometric method to determine the effect of the following variables on the B.O.D. values of a neutralized acid industrial waste: pH, type of seed, age of seed, adapted seed, dilution water, and dilution. In order to determine the effect of each …
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An evaluation of biochemical oxygen demand of organic wastes by measurement of carbon dioxide evolution from aerated activated sludge
The object of this research investigation was to establish whether or not a correlation exists between bottle B.O.D. and CO₂ liberated from a highly aerobic sewage-sludge mixture. The first part of the project consisted of reducing the number of variables in the operation to a minimum. To this end, …
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Effects of arbutamine stress testing compared to treadmill exercise stress testing on electrocardiographic responses of ischemia and myocardial oxygen demand
… ETT, however, it did this at a lower myocardial demand with a greater tendency for arrhythmias. These findings suggest a possible difference in receptor stimulation. The Similarities to exercise in the response variables measured in this study offer arbutamine as an alternative mode of stressing …
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