Process Stability of Activated Sludge Processes
The completely mixed activated sludge process is examined from the viewpoint of process stability. A theoretical basis to determine the process stability is presented. The process stability...

Nutrient Releases from Anaerobic Sediments
Studies were conducted to assess the significance of sediment nutrient release under anaerobic conditions in White Lake. The average sediment nutrient release rates were 25.1 mg P/m²/day...

Variations in Nitrogen and Organics in Wastewaters
The primary and secondary effluents of three treatment plants were sampled to determined diurnal variations in the concentration and mass loading of ammonia, soluble COD, and soluble organic...

Virus Sampling in Wastewater - Field Experiences
Membrane adsorption, chemical precipitation, and soluble alginate filtration methodologies have been combined in the development of a relatively simple yet sensitive procedure for detecting...

Fate of Metals in Wastewater Discharge to Ocean
Trace metals with sewage and sludge particulates from the City of Los Angeles Hyperion Treatment Plant are found to mobilize to a great extent from solids to seawater in the ocean environment....

Removal of Heavy Metals from Industrial Effluents
Increasingly stringent effluent discharge requirements have spurred an interest in more effective and economical methods of removing heavy metals from industrial wastes. Increasing scarcity...

Migration of Subgrade Salts Damages Thin Pavements
In moisture deficient areas, soluble salts contained in road aggregates may be leached to the surface by evaporation gradients. The growth of salt crystals beneath the surfacing layer...

Phosphorus Uptake by Biological Slimes
Although much interest through the years has surrounded luxury uptake of phosphurus by activated sludge, critical attention has largely ignored this subject in favor of biological slimes...

Temperature Effects on Aerobic Digestion Kinetics
The effects of temperature upon the kinetics of waste activated sludge aerobic digestion in batch reactors were studied. Reactors were maintained at temperatures of 5°C, 10°C, 20°C, 30°C,...

Biomass Distribution and Kinetics of Baffled Lagoons
The quantity of attached biomass in a model anaerobic waste stabilization pond is affected by light penetration, hydraulic flow pattern, baffle configuration, and the submerged surface...

Estimation of Estuarine Marsh Productivity
The adsorptive and absorptive capabilities of tidal marshlands have been estimated using various techniques. Thus far, measuring that portion of organic matter (soluble and solid) representative...

Tracer Simulation of Soluble Waste Concentration
The transport of solute in rivers and estuaries can be described by a linear convective diffusion equation. Therefore, the principle of linear superposition can be applied to the dispersion...

Hydraulically Ventilated Underground Filter
A model filter was dosed intermittently at four rates with a soluble carbon-limited feed water. It was found that aerobic conditions could be maintained at organic and hydraulic sidewall...

Phosphate Release in Activated Sludge Process
The mechanisms of soluble phosphate uptake and release by the activated sludge process are the subject of considerable controversy. In this laboratory study, luxury uptake was clearly...

Phosphate Removal at Baltimore, Maryland
The removal of phosphate by activated sludge at Baltimore, Maryland, was a function of mixed liquor dissolved oxygen concentration, BOD loading, and soluble phosphorus loading. Plant research...

Time of Travel of Soluble Contaminats in Streams
Time of travel is measured in streams by introducing Rhodamine B dye and detecting its concentration at a downstream cross section by use of a fluorometer. The computation of the necessary...

Water Quality Changes in Elephant Butte Reservoir
Few investigations of changes in quality of water passing through a large storage reservoir, such as that presented herein, seem to have been made. In addition to the obvious blending...

Solubility of Atmospheric Oxygen in Water: Twenty-Ninth Progress Report of the Committee on Sanitary Engineering Research of the Sanitary Engineering Division
Group of researchers in England conducted experiments that showed significant differences from previously accepted saturation concentrations of gaseous oxygen dissolved in distilled water;...

Adsorption and Assimilation in Activated Sludge
Activated sludge is widely used for stabilization of sewage and industrial wastes; evidence is presented to show that soluble organic matter is removed from solution by assimilation while...

 

 

 

 

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