The characterization and physical-chemical treatability of log pond waters Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/t435gh50t

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  • The treatability of waters from four log ponds in Oregon by physical and chemical treatment methods was investigated. Treatment processes included sand filtration, activated carbon contact and coagulation with aluminum sulfate. Preliminary studies were made at each log pond to determine the homogeneity of the pond water for sampling purposes and to examine the effects of storage time and type of timber stored on water quality. In general the waters throughout each pond were found to be of uniform character. The treatment of log pond water by activated carbon was found to be the most effective method studied. The ultimate capacity of the carbon employed was determined by adsorption isotherms and was found to range between 272 and 485 [superscript mg COD]/[subscript gram carbon]. The jar test procedure was employed to investigate the feasibility of coagulating log pond waters with aluminum sulfate. Alum concentrations ranging from 125 to 175 mg/1 were found to be effective in removing up to 96% of the suspended solids and 68% of the COD. Sand filtration appears to be impractical as a sole method of treating log pond waters. The concentration of lignin-like substances extracted from logs appears to be higher in ponds storing Douglas fir than in those storing ponderosa pine. This observation is primarily based upon the re- sults obtained from the nitroso test (PBI).
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