Dennis W. Weeter

University of Tennessee at Knoxville

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Research Field

Variable Respiration in Aquatic Plant Communities

Journal of the Sanitary Engineering Division (1972)

Archie J. McDonnell Dennis W. Weeter

Test species for the study, which was run in continuous flow and batch type respirometers, included the aquatic macrophytes Potamogeton crispus and Elodea candensis. Consumption rates were found to be dependent on temperature, state of plant maturity, and the oxygen concentration of the test water. Uptake rates were best described by the linear relationship: R = β + αC. Values of β were observed to vary from 0.21 to 0.87 mg gm−1hr−1 with corresponding values of α ranging from 0.04 to 0.09 lgm−1hr−1. Consumption rates varied from 0.2 to 2.8 mg O2 gm dry weight per hr for dissolved oxygen concentrations of 0 to 18 mg per l. A methodology is presented to estimate primary productivity in aquatic ecosystems from observations of the diurnal variation of dissolved oxygen incorporating a variable community respiration rate.

Respirometer

Periphyton

Potamogeton crispus

Dry weight

10.1061/jsedai.0001394

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Citations (2)

A WATER QUALITY PREDICTION MODEL AND A WATER QUALITY SIMULATION PROGRAM FOR THE WABASH RIVER

Dennis W. Weeter

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Analysis of Regional Waste Treatment Systems

Journal of the Environmental Engineering Division (1976)

Dennis W. Weeter James G. Belardi

Numerous mathematical approaches have been taken toward solution of the regional wastewater treatment plant optimization problem. It is questioned whether seeking an optimum solution to this problem is justified, given cost uncertainties, environmental impact questions, and other considerations. The programming techniques involve a considerable amount of mathematical sophistication. Modification of these programs by planning agencies for some alteration to the system would be extremely difficult, if not impossible. Secondly, most of the techniques require long computational times, resulting in added coasts and inefficient use of the computer. Finally, the programs have various flaws when trying to apply their technique to an actual situation.

Sophistication

10.1061/jeegav.0000457

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Citations (7)

Assessing Nonpoint Water Quality for Small Streams

Journal of the Environmental Engineering Division (1978)

Michael E. Meadows Dennis W. Weeter James M. Green

The procedures and results of an assessment study of water quality in a small stream impacted only by nonpoint source pollution are presented. Also, considerations for the design of a small stream monitoring survey are discussed. A mathematical model for water quality in small streams was applied to the monitoring data and estimates of the nonpoint source water quality were obtained. An attempt was made to interpret the nonpoint quality in terms of land use.

10.1061/jeegav.0000837

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Citations (2)

The Impacts of the Resource Conservation and Recovery Act on Wood Fired Energy Systems

Environmental engineering (1980)

Hugh T. Carson Dennis W. Weeter

Resource Recovery

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Utilization of Dry Calcium Based Flue Gas Desulfurization Waste as a Hazardous Waste Fixation Agent

Journal of the Air Pollution Control Association (1981)

Dennis W. Weeter

Several designated hazardous wastes (metal plating waste, oil sludge, heavy metal processing sludge) were studied relative to potential detoxification using dry calcium based FGD sludges. The FGD waste was generated from a pilot scale system which utilized slurried lime, a spray drier, and a bag filter. Following detailed physical and chemical identification of the raw FGD and hazardous wastes, various mixtures were prepared and cured. In all cases, even with the organic sludge, a rigid structural material evolved due to the pozzolanic reactions occurring from the wetted dry FGD waste. Structural characteristics, physical character, and chemical leaching effects were evaluated. The solids were leached via both EPA-RCRA and ASTM proposed leaching procedures. In all cases, the hazardous constituents were retained and not leached. Finally, the feasibility of using dry FGD wastes as fixating materials is discussed.

10.1080/00022470.1981.10465271

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Citations (7)

Current waste-management practices and operations at Oak Ridge National Laboratory, 1982

B.M. Eisenhower T.W. Oakes J.H. Coobs Dennis W. Weeter

The need for efficient management of industrial chemical wastes, especially those considered hazardous or radioactive, is receiving increased attention in the United States. During the past five years, several federal laws have addressed the establishment of stronger programs for the control of hazardous and residual wastes. At a facility such as Oak Ridge National Laboratory (ORNL), an efficient waste management program is an absolute necessity to ensure protection of human health and compliance with regulatory requirements addressing the treatment and disposal of hazardous, nonhazardous, and radioactive wastes. This report highlights the major regulatory requirements under which the Laboratory must operate and their impact on ORNL facilities. Individual waste streams, estimates of quantities of waste, and current waste management operations are discussed.

National laboratory

10.2172/6832582

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Citations (1)

Production of ammonia in a packed-bed, anaerobic upflow (ANFLOW) bioreactor

Masters Thesis (1980)

D.C.M. Hines Dennis W. Weeter R.K. Genung

Anaerobic upflow (ANFLOW) bioreactors which use fixed films of microorganisms have been considered for alternative wastewater treatment systems. The advantages of this system are presented. The presence of ammonia in the effluent results in a high nitrogenous oxygen demand to receiving waters and is toxic to certain biota at low concentrations. The presence of ammonia in the effluents of wastewater treatment systems must be regulated. Effluent ammonia and ammonia production rates were monitored within the ANFLOW bioreactor as synthetic feed compositions and flow rates were varied. Correlations between influence organic nitrogen loadings and effluent ammonia concentrations were sought. Subsequent ammonia removal methods were proposed. It was demonstrated that ammonia can be easily nitrified with an aerobic upflow biological filter with only 5% of the volume of the ANFLOW bioreactor. Methane production was also measured.

Anaerobic filter

Ammonia production

Anammox

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Citations (2)

Dissolved Air Flotation: Theory and Practice

Katrina Roberts Dennis W. Weeter Roy O. Ball

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Hazardous waste fixation using dry flue gas desulfurization waste

Resources and Conservation (1982)

Dennis W. Weeter

10.1016/0166-3097(82)90069-4

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