Oxidation of Sulfide by O2: Catalysis and Inhibition
Reaction rates between sulfide and oxygen in the presence of extraneous substances were studied. Divalent metal ions and organic substances such as phenols and aldehydes were found to...

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...

Treatment of Refinery Waste by Physicochemical Processes
Treatment of a refinery waste was attempted by physicochemical processes to evaluate the feasibility of yielding high quality, reusable effluents. The combined use of iron coagulation...

Implications of Nitrogenous BOD in Treatment Plant Design
This paper is intended to describe the attitude of a major state regulatory agency in the practical application of concepts of water pollution control, particularly with respect to control...

Nitrogen Removal by Modified Activated Sludge Process
A modified activated sludge process called contact-stabilization-denitrification makes it possible to eliminate 80% to 90% of the incoming total nitrogen in addition to the usual BOD removal....

Photosynthesis and Oxygen Balance in Streams
The equation expressing the dissolved oxygen balance in a flowing stream is formulated to include a time-varying photosynthetic oxygen source. The solution to this equation is compared...

Analytic and Process Classification of Effluents
The residual organics in effluents are classified using analytic and process techniques for component identification. There are residual organics in biologically treated effluents that...

Sewage Treatment System Odors and Air Pollutants
The major air pollution problem associated with sewerage systems is odor. Sludge or screening incinerators may discharge particulate matter, incompletely combusted organic compounds, nitrogen...

Nitrogen Losses From Alkaline Water Impoundments
Results of an investigation of gaseous ammonia nitrogen losses from alkaline water impoundments are presented. A method of field measurement of these losses is described and a comparison...

Oxygen Transfer From Falling Water Droplets
Overall oxygen transfer coefficients are obtained for deaerated water droplets falling freely through the atmosphere with and without 50 ppm. of a synthetic detergent. Drop distances ranged...

Chemistry of N and Mn Cox Hollow Lake, Wis., Following Destratification
Concentrations and forms of nitrogen and manganese species were determined in Cox Hollow Lake, Wisconsin, after the lake was destratified by artificial aeration. Destratification of this...

Evaluation of Nitrification in Streams
A simplified procedure for evaluating nitrification progression in a stream is given. Data are presented for the Clinton River between Pontiac and Rochester, Mich, which shows rapid inorganic...

Ammonia Nitrogen Losses from Streams
Preliminary results of an investigation of gaseous ammonia nitrogen losses induced by surface turbulence in rivers and streams are presented and the potential significance of this method...

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....

Waste Disposal and the Future at Lake Tahoe
The extraordinary clarity of Lake Tahoe is threatened by the buildup of nitrogen and other nutrients reaching the lake from community wastes produced in the Tahoe Basin. Although waste...

Aerobic Metabolism of Potassium Cyanide
In activated sludge system, without mixed liquor suspended solids, in which CN served as only source of carbon and nitrogen, it was found that (1) more than 99% of CN was metabolized,...

Air Pollution Studies at University of California at Los Angeles: SED Report No. 10
Microwave methods of studying air pollution; investigation of noncatalytic afterburning and of exhaust scrubbing devices; systems for removing irritants from polluted air; pollution control...

 

 

 

 

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