Fecal Bacterial Kinetics in Stabilization Ponds
Fecal bacterial die-off is described by a first-order reaction assuming complete mixing, thus a series pond system is more efficient than a single pond of equal total volume. The death...

Environmental Control of Bilharzia Snails in Small Reservoirs
In tropical reservoirs certain snails which transmit schistosomiasis, a parasitic disease, may be controlled by engineering methods. This disease, also known as bilharzia, is a chronic,...

Transient Hydrothermal Analysis of Small Lakes
The element method is used to predict the transient, horizontal temperature distribution resulting from the discharge of a heated effluent into a body of water. The methods of heat transfer...

Transient Cooling Pond Behavior

Bacterial Dieoff in Ponds
Quantitative data have been obtained which demonstrate the effect of representative algal species on selected enteric bacteria. The data show that individual algal species exert little...

Treatment Efficiency of Waste Stabilization Ponds
A practical method is given for evaluating the influence of the hydraulics on waste water pond performance. The analysis is based on time-concentration data collected at the outlet for...

Reducing Pond Evaporation with Perlite Ore
Floating solid and granular materials appear to provide a practical means of reducing evaporation losses from open water surfaces. The increased efficiency of these materials over monomolecular...

Stilling Pond Storm Overflow Studies
A model stilling pond storm water overflow was tested with a side-wall siphon towards the upstream or downstream end. Light solids were retained in the pond and heavy solids moved to the...

Cooling Pond Temperature Versus Size and Water Loss
The primary cost item related to cooling ponds is land; therefore, the economic feasibility of a cooling pond system may be determined by a specific design area. As with any wet cooling...

Evaluation of Some Stabilization Ponds in India
Because of favorable climatic conditions in India and simplicity of construction and operation, engineered waste stabilization ponds are successfully competing with conventional processes...

Disinfection of Algal Laden waters
With more prevalent algal problems in surface waters and the increased use of wastewater stabilization ponds, the need for additional information on how algae affect the process of water...

Sewerage and Sewage Treatment: State-of-the-Art Abstracts
Abstracts of 13 ongoing research projects are given. The summaries consider activated sludge effluent, clarification processes, ecology in waste stabilization ponds, wastewater treatment...

Design Principles of Waste Stabilization Ponds
Waste stabilization ponds will be more effectively employed as pollution control systems if suitable design formula and corresponding design parameters are made available to design engineers....

Sulfide Production in Waste Stabilization Ponds
This investigation deals with the production and release of hydrogen sulfide from waste stabilization ponds, and required design modifications, resulting from increased sulfate or hydrogen...

Loading Rates on Waste Stabilization Ponds
Pond performance is affected by temperature, solar radiation, and wind-speed; therefore, facultative pond design should reflect the influence of local climatological conditions. Ponds...

Viral Pollution of Shellfish in Estuary Waters
Enteroviruses appear in oysters following pollution of estuary waters by waste-treatment plant effluents. Primary treatment, with or without chlorination, and stabilization pond effluents...

Survival of S. Typhi in Sewage Oxidation Ponds
Tests indicate that Salmonella typhi survive for longer periods in anaerobic than in facultative lagoons. Laboratory tests on the survival of Salmonella typhi were made in several columns,...

An Oxidation Pond as a Tertiary Treatment Device
Tertiary treatment is becoming necessary to effect greater removal of BOD, solids, and coliform organisms from the effluents of conventional secondary wastewater treatment facilities....

Evaluation of Two Aerated Lagoons
Field studies of two aerated lagoons treating domestic sewage over a 2-yr period yielded 63% BOD reduction with 1.7 days aeration and 78% BOD reduction with 7.1 days aeration. The use...

Estimating Forced Evaporation from Cooling Ponds
Forced evaporation from cooling ponds can be estimated with reasonable accuracy from readily available information. The only data needed are the amount of heat added by the plant, and...

 

 

 

 

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