Saturation Kinetics for Preferential Nitrogen Uptake
Mathematical models of aquatic systems frequently represent phytoplankton growth dynamics in nutrient limited environments by saturation or Michaelis-Menton type kinetics. When nitrogen...

Biological Oxidation of Coke Plant Effluent
The purpose of this study was to address some of these issues by investigation of biological oxidation characteristics of specific coke plant ammonia still effluent. Specific objectives...

Sediment Oxygen Demand and Nutrient Release
Benthic oxygen demand rates in rivers ranged from 0.10 gm/m to 5.30 gm/sq m/day and were found to increase linearly with dissolved oxygen concentrations in the water overlying the sediment...

Biological Treatment of Synthetic Fuel Wastewater
A wastewater biological treatability study was performed with effluent from the Grand Forks Energy Technology Center slagging fixed-bed coal gasification process. It was found that ammonia...

Modeling Framework to Address AWT Decisions

Trace Organics Removal by Advanced Waste Treatment
The performance of an advanced waste treatment plant, Water Factory 21, located in Orange County, Calif., was investigated with respect to organics removal. The processes for treating...

Fixed-Growth Nitrification of Secondary Effluent
A downflow submerged-bed, fixed-growth nitrification process has been successfully applied to the effluents of an activated sludge process and an independent physical-chemical treatment...

Evaluation of EPA Recommended Treatment and Control Technology for Blast Furnace Wastewater
The EPA recommended technology for treating blast furnace wastewater, essentially suspended solids removal and recirculation, was evaluated and found to be inadequate to produce effluent...

Clinoptilolite Column Ammonia Removal Model
A simple model employing a linear driving force in the particle phase has been successfully employed to model ammonium removal from a synthetic wastewater by a column of clinoptilolite....

Direct Injection of Reclaimed Water Into an Aquifer
The changes in water quality that occur when reclaimed water is injected into a confined aquifer are being studied. The major objectives are: (1)To determine the quality changes; (2)to...

Kinetics of Bacterial Deactivation with Chlorine
A power function relating coliform bacteria deactivation to the product of the chlorine contact time, t, and the initial chlorine residual concentration, R, is applied to disinfection...

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...

Salt Removal Efficiencies on Land Disposal of Swine Waste
Swine waste aerobic lagoon effluent was sprinkled overland and the runoff water was collected. Both the waste effluent and the runoff water were analyzed for nitrate, ammonia, chloride,...

Ozone Effect on Nitrogenous Matter in Effluents
A study of the effect of ozone on various nitrogenous compounds found in effluents was undertaken using two systems: (1)Effluents after lime treatment; and (2)solutions of specific nitrogenous...

Nitrification Rate in Biological Processes
At least four reaction rate equations have been proposed to describe the process of nitrification. A more precise understanding of this reaction rate is needed to optimize the design of...

Removal of Lignin from Water by Precipitate Flotation
Flotation was effective for the removal of lignin from aqueous solution when alum (aluminum sulfate) was used as a precipitator and a cationic surface-active agent, such as a quarternary...

Improving Mercury (II) Removal by Activated Carbon
Research was performed to evaluate the effectiveness of mercury (II) removal from water by activated carbon with and without chemical aids. Batch tests, adsorption isotherms, and column...

Factors Affecting Ammonia Removal by Clinoptilolite
The effect of ammonium ion concentration, flow rate, and temperature on ammonium ion removal from solution by the selective ion exchange resin, clinoptilolite, were investigated. Columns...

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...

Nitrogen Transformation in Activated Sludge Treatment
In a full-scale activated sludge treatment plant treating nutrient deficient pulp mill waste, the supply of supplementary nitrogen was interrupted for a period of 25 days. This interruption...

 

 

 

 

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