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...

Oxygen Utilization in Bacterial-Protozoan Community
A mathematical model for nutrients, microorganism growth, and oxygen utilization is developed and compared with experimental results using a population consisting of a bacterium and a...

Chlorine Disinfection of Low Temperature Waters
This study evaluated chlorine disinfection of water at controlled temperatures of 0.5°C, 4°C, 8°C, 12°C, 16°C, and 20°C. Bacterial tests were made by the membrane filter technique. The...

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...

Virus Removal by Diatomaceous Earth Filtration
An investigation was made to determine the removal of bacteria viruses, T4 and MS2, by filtration through uncoated and polyelectrolyte coated diatomaceous earth (DE). Using a bench scale...

Protection of E. Coli in Montmorillonite in Seawater
Increasing pollution of marine estuaries from sewage outfalls has led to intensive research on the mechanisms of decline in enteric microorganisms in the sea. The purpose of this investigation...

Oxidation and Heave of Black Shale
Heave of floor slabs and lightly loaded structures founded on black, pyritic shales has been a severe engineering problem in several places in the world. The geochemical processes responsible...

Persistence of Virus and Bacteria in Seawater
At a temperature of 38–40° F bacterial survivals (Escherichia coli) were significantly enhanced in seawater deliberately polluted with small...

Bactericidal Properties of Chlorsulfamates
The low bactericidal potency of dichlorsulfamate and the apparent nonexistent bactericidal potency of monochlorsulfamate counter-indicate the use of sulfamate ion as a chlorine stabilizer...

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...

Kinetics of Chlorine Disinfection in an Ecosystem
Chlorination is one method of achieving dependable disinfection of waste pond effluents, but the presence of unicellular green algae in such effluents makes effective chlorination complex....

Effect of Calcium Bicarbonate on Disinfection by Halogens
The inorganic entities in water comprise a significant portion of chemicals in water and their effects upon the disinfection process should be fully evaluated. This investigation was undertaken...

Clean Water—An Environmental Challenge
In 1969 the Porter-Cologne Act in California broke through institutional constraints to link the environmental goals of society to the objectives of water pollution control technology....

Pneumatic Barrier and Beach Pollution
The feasibility of improving the bathing conditions of certain beaches by using pneumatic barriers both with and without chlorination was determined by an experimental system consisting...

Influence of Summer Use of a Mountain Watershed on Bacterial Water Quality

Metal Toxicity to Sewage Organisms
The Michaelis-Menten model of enzyme inhibition is a convenient method to measure toxicity and to give insights to toxic behavior in pure culture and simple substrate conditions. A linear...

Biokinetic Evaluation of BOD Concepts and Data
The current techniques for analyzing BOD test data are considered and their inadequacies are pointed out. The paper deals primarily with a consideration of the BOD test as a process and...

Destruction of Bacteria and Viruses in Seawater
Marine microbial predators destroy enteric bacteria in seawater. Viruses are destroyed by unknown marine microbial antagonists and by a toxic chemical component of the seawater. Viruses...

Diffusion of Sewage Effluent from Ocean Outfall
Full scale diffusion experiments were conducted during August and December 1968 to estimate coliform bacteria concentration patterns of sewage effluent from an ocean outfall located at...

Batch Adsorption Kinetics in Sewage—Activated Carbon
Batch adsorption experiments using a well-mixed system of secondary effluent domestic waste water and granular activated carbon were performed, and the rate of decay of organic contaminants...

 

 

 

 

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