Evaluation of the Nitrogen-Related Deoxygenation Process in a Polluted Water

Nitrogen and Phosphorus Movement in a Freshwater Tidal Wetland Receiving Sewage Effluent

Aquatic Macrophytes in White Lake, Michigan
Samples of plants were analyzed for carbon, hydrogen, nitrogen, potassium, and phosphorus. The findings reveal that the areal extent of the macrophytes approaches one-fifth of the lake...

Real Time Simulation of Nitrogen Cycle in an Estuary
A water quality model containing seven nitrogen storage variables appropriate to an aerobic, nitrogen limited, aquatic ecosystem is described. The model distinquishes between various organic...

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...

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...

Nitrogen Transformations in Land Treatment
The storage lagoon of a land treatment system functions as a dynamic biological reactor in which algae and bacteria can transform input nitrogen. A quantitative estimate of these nitrogen...

Role of Nitrogen in Activated Sludge Process
Study of the effect of nitrogen limitation on metabolic activities of activated sludge has been conducted by using a completely mixed continuous flow bench-scale activated sludge unit....

Let's Consider Land Treatment, Not Land Disposal
The regulations that control operation and design of land treatment systems are discussed. A solution to control ground water pollution must consider all potential impacts. Pretreatment,...

Nutrient Transformations in Mass Cultures of Marine Algae
Two mass cultures of marine algae were maintained for 24 continuous weeks on mixtures of secondarily treated wastewater and seawater. Nitrogen removal and algal growth were related to...

Fate of Nitrogen in Sewage Effluent Applied to Soil
Natural chemical and biological reactions will remove nitrogen from sewage effluent applied to soils if the wastewater is applied in a carefully managed treatment system. Only denitrification...

Nitrogen Isotopes and Water Quality Research

Nutrients and Aquatic Vegetation Effects
After eutrophication from natural and civilizational causes is explained, the term oligotrophication is defined as the (partial) reversal of the eutrophication process under the influence...

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...

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,...

NOx Emissions from Stationary Combustion Sources
The origin, effects, and abatement procedures for oxides of nitrogen emissions from stationary sources are examined. In assessing the most promising short-range methods for abating NOx...

Preliminary Model of Potomac Estuary Phytoplankton
The upper 40-mile reach of the Potomac Estuary is modeled by a nonlinear, time variable representation of phytoplankton dynamics. Nitrogen and phosphorous recycling is included. Sensitivity...

Effects of Iron on Activated Sludge Treatment
The importance of inorganic nutrients on activated sludge treatment has not been emphasized or studied extensively. Studies of the fundamentals of inorganic ions have been limited to nitrogen...

Carbon and Nitrogen as Regulators of Algal Growth
Continuous flow algal cultures were grown under three different growth conditions using secondary sewage treatment plant effluent as the growth medium. The only variable within each run...

Optimal Control of Nitrogen Losses from Land Disposal Areas
The land disposal alternative is not free from water pollution potential. Nitrogen losses from percolation and runoff may contaminate water supplies and contribute to the eutrophication...

 

 

 

 

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