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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.

Industrial wastewater treatment by dissolved air flotation and sedimentation

Carolan, R. P. January 2001 (has links)
No description available.

Effluent from the ensilage of grass as a source of nutrients for the pig

Patterson, D. C. January 1980 (has links)
No description available.

Organics in the lower Fox River system selected acidic compounds /

Groose, James E. January 1982 (has links)
Thesis (M.S.)--University of Wisconsin-Madison, 1982. / eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (p. 208-225).

Implementation of a novel pigment recovery process for a paper mill

Jortama, P. (Pirjo) 19 December 2003 (has links)
Abstract The objective of this study is to demonstrate an ecological and economic recovery process, which was developed and implemented at Stora Enso Oyj Fine Paper Oulu mill during the period 2000 to 2002. The ECO plant recovers the material called ECO pigment from the effluent treatment sludge and it can be used as a filler in multicoated fine paper production for art printing purposes. The ECO plant process consists of the following process stages. First, there is a separating phase for the recoverable material from fibres and other rejects, which is done with a wire washer. Then the fractionating of the recoverable material is performed with two-stage centrifugal cleaners. Chemical treatment with peracetic acid is used as a preservative and to increase the brightness of the ECO pigment a little. Then the recoverable material is stored in the pigment storage area and dosed to the paper machines as a filler. The rejects from the ECO plant are thickened in belt filter presses and then transferred to the bark storage area, where they are mixed with bark and combusted in a solid fuel boiler. The majority of the particles of the recovered ECO pigment were less than 45 μm; this size of particle accounted for 96.4% (on average) according to the studies made between June and December 2002. The use of ECO pigment is not found to cause more web defect problems on the base paper than before, according to the studies of the number of total web defects with the achieved particle size distribution and because the microbe content has been controlled. There are three sources from which the ash content of the base paper is composed after the start-up of the ECO plant, i.e. the broke, the virgin filler and ECO pigment. Therefore the use of ECO pigment partly decreases the need to use virgin filler. The ECO pigment was tested in the coating colour in pilot tests, and based on these results it could be used in the coating colour. The dry solid content of the ECO pigment has to be increased from the present level for the coating application.

An investigation into the biodegradation of synthetic polymer dispersions employing a model system based on polyvinyl acetate

Hesketh, Andrew J. January 2000 (has links)
No description available.

The use of stochastic simulation to investigate trends in the water quality of the River Clyde catchment area

McAlpine, Janette Donald January 1999 (has links)
No description available.

The impact of chemically assisted sedimentation on downstream treatment processes

Lees, E. J. January 2001 (has links)
No description available.

Biogeochemistry of polychlorinated biphenyls (PCBs) in estuarine sediments

Edgar, Petrena Joyce January 2001 (has links)
No description available.

The removal of heavy metal ions and organics from aqueous solutions using a reticulated vitreous carbon cathode cell

Ponce de Leon Albarran, Carlos January 1994 (has links)
No description available.

Heavy metal tolerance, uptake and accumulation in populations of Typha latifolia L. and Phragmites australis (Cav.) trin ex. streudel

Ye, Zhi Hong January 1995 (has links)
No description available.

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