Pilot study of impulse drying industrial sludge

Article Abstract:

Impulse drying was successfully used to remove water from industrial sludge produced by two paper mills in Georgia. Impulse drying involves initiating contact between a hot roll under pressure and a moving sheet of pressed sludge. The contact converts water at the sludge-roll interface to steam and the resulting pressure expresses a part of the water from the sludge in liquid form. The process uses about 60 KWH of energy per ton of dry solids, thereby providing an cheap energy-efficient means of increasing sludge solids.

Comment:

Impulse drying is successfully used to remove water from industrial sludge produced by two paper mills in Georgia

United States, Manufacturing processes, Science & research, Paper & Allied Products, Paper Manufacturing, Solid Waste Collection, Industrial Solid Waste, Paper industry, Industrial solid wastes, Article

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Tracing the efficiency of secondary treatment systems

Article Abstract:

Radioactive oleic acid was used to develop a method for the mapping of a secondary treatment system's three-dimensional performance. Water-column biodegradation was an important factor in lowering oleic acid levels, but sorption to solids may be the most important removal pathway. Additionally, the method was applied to describe the performance of activated sludge treatment systems and aerated stabilization basin system.

All Other Miscellaneous Chemical Product and Preparation Manufacturing, Chemical preparations, not elsewhere classified, Oleic Acid, Research

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In-situ measurement of local biodegradation during secondary treatment: application to bleached pulp mill chloroorganics

Article Abstract:

A technique for determining chemical-specific in-situ biodegradation in secondary systems is applied to organochlorine residues from bleached Kraft pulp mills. Results demonstrate that only 15% of the chlorinated effluent, called AOX or adsorbable organic halides, biodegrades. Most of the AOX and chloroorganics reduction were also found to take place very early in the treatment system.

Analysis, Measurement, Organic compounds

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