White pitch deposits originated from the wood
extractives, synthetic polymers, and additives used in the
papermaking process, etc. may cause numerous problems to the
papermaking process and also degrade the product quality.
The timely analysis and characterization of white pitch
deposit is important for tracing the origin of the deposits....
With the incredible technological advancements that have come from the introduction of plastic many problems have arisen. Once plastics were created the value of items once they reached their end of life were lowered. Considering the majority of all plastics created are for packaging with single-use intentions people now dispose...
Black liquor gasification is one of the promising alternatives to
eliminate the drawbacks of the conventional recovery unit of the
kraft process. A numerical model has been developed to simulate an
industrial pilot scale entrained-flow gasifier currently operating at
Tampere, Finland. The objective of the model is to investigate the...
This publication compares composted and uncomposted manure; explains the composting process; describes equipment and strategies for composting; and lists uses, advantages, and drawbacks of compost. Discusses regulations, and briefly mentions methods for composting animal carcasses.
Household recycling is an important means by which social costs of solid waste
disposal may be reduced. These costs include energy and resource costs of collection
and disposal as well as environmental costs from emissions from landfills, incinerators,
and collection vehicles. In this thesis, a household production model is used...
Physical and chemical properties of wood (W) fiber (F)
pellets (P) and wood (W) shavings(S) were determined in the
laboratory prior to their use.
Laboratory results showed that WS were superior to WFP
except for moisture holding capacity on volume basis which is
one of the most essential properties of...
Large quantities of unused heavy oil and residual waste products from the petroleum refining industry were deposited in on-site landfills, pits, and lagoons, prior to the promulgation of regulations governing their disposal and technology development that would further utilize and/or recycle these materials.
Contacting petroleum products with sulfuric acid for...
The change in the oscillation frequency in the current of
an atmospheric helium glow discharge is a sensitive detector
for gas chromatography. The response of the detector is in
the femtomole and picomole range for nonane and decane. The
effluent of a capillary column is directed into a glow
discharge...
A novel technology for processing pulp slurries with high inorganic filler content and at high consistencies (solids content) is extrusion. The paper industry waste comprises of fibers mixed with inorganic filler content. Using extruders similar to food extruders and consistencies ranging from 30-45%, profiles can be extruded from this waste...
The purpose of this study was to examine Oregon State University students' self-reported knowledge, attitudes, and behavior about recycling. Students living in on-campus and off-campus organized living groups were mailed a four-page survey with questions about their recycling activities, their attitudes about recycling, their opinions of the effectiveness of the...
The coagulation of effluent from the kraft pulping and
papermaking process was investigated. The amount of material
coagulated from saline mixtures of the effluent is determined
as a function of time, salinity, kraft effluent
concentration, and mixture pH. Individual sources of salinity
include sea water and several different solutions of...
Plastic waste in the oceans is now recognized as a serious threat to marine life and a pollution problem with economic consequences for mariners and coastal states. Annex V of MARPOL, effective December 1988, is an international treaty which prohibits signatory nations from disposing of any plastic material into the...
This publication addresses factors that farmers must consider when planning an on-farm composting enterprise: the composting process and its impact on water quality, site selection, facility layout and design, composting methods, and managing water and leachate. The content pertains to small and medium-size on-farm composting enterprises that handle about 100...
A new technique is developed to recover elemental tellurium (Te) from cadmium telluride (CdTe) which is abundantly available in photovoltaic semiconductor waste. The method is based on microchannel fluid flow with the use of a supported liquid membrane (SLM) between the donor (feed) and acceptor (strip) channels. A predictive theoretical...
Algae have shown great potential as a source for renewable fuels. However, current production schemes have not been able to prove a sustainable energy return on investment due in part to the high costs of nutrient addition and the energy required for drying the biomass. Integrated algae-dairy production systems have...
In an era of human-induced climate change, there is increasing interest in encouraging people to reduce their carbon dioxide (carbon) emissions by adopting low-carbon behaviors, or behaviors that reduce a person’s use of fossil fuels. I designed the Campus Carbon Challenge as a research and outreach project to gain a...