Reservoir Metalimnion Oxygen Demands
Field data show that oxygen demanding substances, both biotic and abiotic, are concentrated in the metalimnions of stratified lakes and reservoirs. The result of this is that high rates...

Modeling Dissolved Oxygen in the Near-Field

Water Motions in Closed-End Residential Canal
Waterfront housing on closed-end canals is a frequently encountered mode of shoreline development in Florida and other States. Indications are that many of these canals at one time or...

Distributions of BOD and DO in Rivers and Lakes
The differential equations for horizontal distributions of biochemical oxygen demand (BOD) and dissolved oxygen (DO) are presented. In general, these equations cannot be solved. Therefore,...

Wastewater Storage-Simulation of Instream Effects
Simulations using computer models to predict the instream effects of storing wastewater during periods of low streamflow and releasing during periods of high streamflow indicate that instream...

Analysis of Oxygen Demand of Sediments

Analysis of Multiple Objectives in Water Quality
The needs for mathematical models that are susceptible to multiple objective functions in their noncommensurable format and units are presented. Several water quality objectives and goals,...

Effects of Shock Temperature on Biological Systems
The BOD, COD, and oxygen uptake data were used to evaluate equilibrium and shock temperature studies on 35°C and 50°C activated sludge systems. The BOD removals of 96% or greater were...

Optimization of Denitrification Process
A denitrification system composed of a completely stirred tank reactor (CSTR) followed in series with a plug flow reactor (PFR) was tested in order to minimize the disadvantages of each...

Oxygen Transfer at High Solids Concentrations
Oxygen transfer relationships have not been well defined for mixed liquors with high solids concentrations. This study evaluated the ability of a cage rotor to transfer oxygen in an operating...

Atmospheric Reaeration in a River Using Productivity Analysis
Two new methods for estimating the reaeration coefficient in rivers have been developed. The methods use measurements of dissolved oxygen and incident radiation with a solution to the...

Oxygen Depletion Model for Cayuga Lake
A one-dimensional oxygen depletion model was constructed for Cayuga Lake (upstate New York) for the period of summer stratification. A primary objective was to determine the relative importance...

Simulation of Water Quality in Tarawera River
The Tarawera River, New Zealand, receives effluent from two paper and pulp mills and exhibits a very high rate of deoxygenation. Attempts have been made to predict water quality in the...

Pitfalls in Parameter Estimation for Oxygen Transfer Data
A consideration of methods employed to estimate the overall oxygen transfer coefficient and dissolved oxygen saturation value from nonsteady-state aeration tests is presented. The importance...

Static Leaching Studies on Pulpwood Bark Residues
The National Council of the Paper Industry for Air and Stream Improvement, Inc. undertook a laboratory study to define the quantities of BOD5, COD,...

Consumers Water Quality Index
A water quality index based on physical, chemical, and biological parameters is proposed. The index is based on a geometric mean of transformed values of the parameters with a range of...

Critical Oxygen Deficit for Bank Outfall
A two-dimensional equation for the mass balance of dissolved oxygen (DO) is integrated numerically to obtain the distribution of oxygen deficit resulting from a bank outfall of BOD in...

Water Quality Models Using the Box-Jenkins Method
The Box-Jenkins method, a time-based technique for time series analysis, is shown to be successful in modeling chloride and dissolved oxygen data for the St. Clair River near Corunna,...

Dynamic Leaching Studies on Pulpwood Bark Results
Recent years have witnessed a growing concern by the pulp industry over the effect of bark disposal operations on receiving water quality. In these circumstances the National Council of...

Plant Performance Using Dissolved Oxygen Control
The Renton Sewage Treatment Plant offered a unique opportunity to obtain unbiased, comparative performance evaluation data for both automatic and manual dissolved oxygen control. The data...

 

 

 

 

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