No description available.

No description available.

To replace nonrenewable materials, glass, plastics and metals, at the market the production of the environmental friendly material paper needs to increase numerously. An increased paper production leads to an enlarged wastewater flow at the paper mill and thereby higher surface load in the biologicalwastewater plant. Higher surface load in turn, leads to lower efficiency and higher emissions. To be able to increase the capacity of the paper production, the wastewater flow to the biological wastewater treatment needs to be decreased. In this thesis, the wastewater at Skärblacka mill has been studied to identify how to increase the production without increasing the flow of wastewater to the biological wastewater treatment. Different wastewater has been studied to identify sufficient clean wastewater flows that today are directed to the biological wastewater treatment. The outcome of this thesis is that up to 600 m3/h wastewater could be removed from the biological wastewater treatment due to sufficiently high purity. This outcome is primarily based on measurements of the emission parameters, Total Organic Carbon, Suspended Solids, Total Phosphorus and Total Nitrogen and the calculation of PEC/PNEC, environmental assessment, for the chemicals in the wastewater. The unload of up to 600 m3/h will contribute to an increased efficiency in the biological wastewater treatment and thereby lower emissions. Increased efficiency and lower levels of emissions will in turn contribute to a possibility to increase the paper production at Skärblacka mill without interfering withenvironmental demands.

No description available.

Typescript. / Bibliography: leaves 163-174. / xiv, 174 l illus., maps, graphs, tables

The New River Estuary is a large mesotidal estuary connected to Foveaux Strait by way of an inlet, and has two principle rivers (the Oreti and the Waihopai) flowing into it. The purposes of this study have been to describe the sediment distribution within the estuary; investigate the sediment source-sink relationships.; to calculate whether on a net basis sediment is being deposited in or eroded from the New River Estuary, and to investigate some of the influences on the sediment dynamics of this estuary. Textural analysis of the sediment indicated that there are three sedimentary environments within the estuary, and each is distinguishable due to the relative mix of fine sand. It was shown that Foveaux Strait is a dominant source of medium-fine sand. The Oreti River and the channels of the main estuary body are also important sources of these sediments. Medium-fine sand is transferred into the estuary and very fine sand is transferred out of the estuary and onto the continental shelf. Aerial photographs indicated that estuarine morphology was stable over a 31 year period (from 1947 to 1978). However a network of scour rods indicated that the intertidal sediment surface was spatially and temporally dynamic. It was calculated that on a net basis sediment was deposited in the estuary over a five month period. An important influence on the sedimentation of the New River Estuary has been the reduction of the tidal com partment by 25%, due to the reclamation of 12.2 km2.

Thesis (Ph. D. - Geology)--University of Arizona. / Part of illustrative material fold. in pocket. Bibliography: leaves 243-249.

Thesis (Ph.D.)--McMaster University (Canada), 1991. / Source: Dissertation Abstracts International, Volume: 54-02, Section: B, page: 0705.

Thesis (Ph. D.)--University of Texas at Austin, 2007. / Vita. Includes bibliographical references.

Thesis (Ph. D.)--University of Adelaide, Dept. of Geology and Geophysics, 1988. / Typescript (Photocopy). Includes bibliographical references (leaves [181]-206).