Heat Treatment and Anaerobic Digestion of Refuse
Alkaline heat treatment was evaluated as a pretreatment process for increasing the anaerobic digestibility of municipal refuse. The goal was an increased methane yield from refuse lignocellulose....

Anaerobic-Filter Pretreatment Kinetics
Pilot studies with synthetic and actual dairy wastewater showed that anaerobic-filter pretreatment at ambient temperature (20-24°C) was capable of reducing total BOD5...

Alkaline Ferrous and Sulfide Reduction of Chromium

Concrete Aggregate Requirements and Performance

Lime Use in Anaerobic Filters
The establishment and maintenance of conditions suitable for optimum biological metabolism plays a larger role in the success or failure of anaerobic reactors than other factors such as...

Rain Water Management for Low Land Rice Cultivation in India
In India, only a small portion of the total rainfall is utilized for crop production; the rest runs off. Nearly 2,500,000 ha of alkali soils of the Indo-Gangetic region (characterized...

Landfill Management for Double Alkali Sulfur Dioxide Scrubber Sludge
Based on the results of extensive laboratory tests on two different scrubber sludges from double alkali sulfur dioxide control systems and observations and measurements made at two different...

Durability of Concrete Construction — 50 Years of Progress
In 1925, many of the problems of concrete durability were recognized. It was also recognized that concrete that had endured for 2,000 yr existed. The need for recognizing the destructive...

Conversion of Organic Waste to Fuel Gas
The feasibility of a single-step process for the direct production of a synthetic natural gas from solid organic waste was investigated. Conversions were effected by injecting steam into...

Alkali — Silica Reaction: A Major Cause of Concrete Deterioration

Gas Transfer Kinetics of Pure Oxygen System
A mathematical model is described which determines the gas and liquid phase of oxygen, nitrogen, and carbon dioxide concentrations along with the variation in gas flow and pH in a completely...

Response of Anabaena to pH, Carbon, and Phosphorus
The objectives were to study the roles of carbon and phosphorus in cultural eutrophication, and to investigate the observation that blue-green algal blooms are frequently associated with...

Investigation of Deteriorated Concrete Arch Dam
Investigation of a 40-yr old concrete arch dam is described. Apparent normal weathering processes had caused deterioration to a point where repairs were necessary. Repairs were started...

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...

Precipitation of Iron in Aerated Ground Water
Efforts were made to determine the factors which govern the kinetics of iron precipitation so that a more rational approach could be applied to the engineering design of reaction basics...

1964 Irrigation and Drainage Research Conference: Summary Reports of Panel Discussions: Salinity and Alkali Problems
A report on the prevention of salinization of soils and research needs for salinity control....

Installation of Drain Tile for Subsurface Drainage
Soil Conservation Service provided technical assistance on installation of 24,059 mi of tile drains during 1959 fiscal year; tile used in surface drainage and current procedures in making...

Installation of Drain Tile for Subsurface Drainage
Soil Conservation Service provided technical assistance on installation of 24,059 mi of tile drains during 1959 fiscal year; tile used in surface drainage and current procedures in making...

Investigation of the Corrosive Behavior of Waters
An interpretation is given to specific corrosion results obtained in field and laboratory investigations. The complex mutual interaction of corrosion stimulating and inhibiting factors...

Water Quality in the Missouri River
Pollution study conducted from concern over river's potential as plankton producer following clarification expected from reservoir system; reservoir influences upon water...

 

 

 

 

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