Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 595 for “"pre-treatment"”.
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Development of new membranes for desalination pre-treatment
… 10 times cheaper than commercial membranes. Pre-treatment for desalination was chosen as an application for these new membranes, based on the fact that desalination is a growing technology, especially in areas where there is lack of fresh water and also because seawater contain wide variety …
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Development of a biomass gasification pre-treatment system
This project was focussed on drying and feeding timber-yard waste for a gasifier and the assessment of the feedstock drying on the gasifier performance. This required a thermodynamic model to be developed in order to assess the effect of drying as was highlighted in the literature survey. A heat …
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Volatile fatty acid production during thermophilic aerobic digestion pre-treatment
… application of thermophilic aerobic digestion pre-treatment as a method of producing volatile fatty acids (VFA) for potential use as a denitrification carbon source. In order to achieve this goal, volatile fatty acid production and nitrogen release were examined under two oxygenation states …
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Conventional and Advanced Thermal Hydrolysis in Sewage Sludge Pre-treatment
… those of autoclaves, reaching up to 200 ℃) and pressure (reaching up to 25 bar) in the absence of oxygen, holds promise as a technology for pre-treating sludge before anaerobic digestion (AD) to enhance biogas production. Operating at elevated temperatures, THP also offers sludge disinfection …
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Identification of Personality Characteristics in Pre-Treatment, Adolescent Substance Abusers
… checksum: f0e6a7087e955a6881f10779491b9884 (MD5) Previous issue date: 1978
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Acute hypoxia-induced diaphragm dysfunction is prevented by antioxidant pre-treatment
Diaphragm weakness is a strong predictor of poor outcome in patients. Acute hypoxia is a feature of respiratory conditions such as acute respiratory distress syndrome and ventilator-associated lung injury. However, the effects of acute hypoxia on the diaphragm are largely unknown despite the …
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Effects of Thermal Hydrolysis Pre-Treatment on Anaerobic Digestion of Sludge
… few years has led to the employment of various pre-treatment methods prior to anaerobic digestion to increase gas production. These pre-treatment methods alter the physical and chemical properties of sludge in order to make it more readily degradable by anaerobic digestion. The thermal …
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Advanced aerobic digestion to optimize pathogen reduction: Staged pre-treatment in aerobic digestion
… An approach of studying the effect of a pre-treatment step prior to digestion was developed following site visits to eight aerobic digestion facilities in Ontario. The experimental phases of this work evaluated the effect of aeration rate, temperature and retention time on pathogen …
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Automatic pre-treatment validation in radiotherapy by computer aided 3D-2D image alignment
… radiotherapy is the geometric verification of treatment delivery. This thesis extensively studied three-dimensional (31)) to two-dimensional (2D) image registration methods. The author has proposed two novel methods to register computerised tomography (CT) based volume image data acquired for …
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Assessment of pre-treatment technologies for bio-ethanol production using multi-objective optimisation
… which does not contain free sugars, but requires pre-treatment so as to promote access to polysaccharides for hydrolys is to sugars prior to fermentation to ethanol. Lignin present in bagasse prevents access to cellulose, thus lignin is often solubilised in a basic solution prior to hydrolysis. A …
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Ammonia leaching as a pre-treatment for the processing of oxidised PGM ores
… mineral processing technologies for the treatment of low grade oxidised PGM ores. The exposure of the ore to the atmosphere leads to the formation of an oxidation layer (consisting of base metal oxides) which inhibits the flotation process that requires a clean mineral surface to be …
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Pre-treatment Level of Opioid Use as a Predictor of Chronic Pain Rehabilitation Outcome
… current study examines the relationship between pre-treatment opioid use and treatment outcomes among 1,226 chronic pain patients who participated in a functional restoration program. Patients were divided into five categories based on self-reported pre-treatment level of opioid use. Patients …
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Twin screw extrusion pre-treatment of wheat straw for biofuel and lignin biorefinery applications
Pre-treatment of wheat straw(lignocellulosic) biomass is a crucial step as it has direct impact on the subsequent yield of enzymatic saccharification and alcohol fermentation processes in the production of biofuel. Twin screw extrusion is a highly feasible pretreatment method and has been received …
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My Identi T: Improving Mental Health Outcomes Through Group Support In Pre-Treatment Transgender Teens
… youth (TGY) are at an increased risk for depression, anxiety, and suicidality; delaying transition can worsen this. Nationally, gender programs have waitlists beyond a year. In conservative states, providers are fewer in number, and legislation may prohibit services. Thus, gender programs …
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Investigating the effects of pre-treatment of tropical seaweeds and freshwater macrophytes for bioenergy production
… investigating the effects of thermo-chemical pre-treatment on the hydrolysis of the aquatic plants, measured through the release of reducing sugars. Different acids/alkalis were used to investigate the effects of acid concentration, temperature, and residence time. Findings show that 1% HNO3 …
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Pre-treatment and anaerobic codigestion of waste activated sludge from a petrochemical wastewater treatment plant
During the aerobic treatment of wastewater, waste activated sludge (WAS) is generated which requires further treatment. The typical treatment method applied for treating the sludge is incineration. The National Environmental Management: Air Quality Act (NEM:AQA), promulgated in 2004, was amended in …
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Treatment of dairy wastewater using enzyme pre-treatment coupled with an expanded granular sludge bed reactor
… in the wastewater. This study investigates the treatment of dairy wastewater (DWW) using a biological pretreatment coupled with an anaerobic down-flow expanded granular sludge bed reactor (DEGBR). The DEGBR system, previously utilized in the treatment of PSW, showed satisfactory removal …
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Produced Water Treament Using DAF With a Mixture of Ionic Liquids and Organoclay as Pre-treatment Chemicals
… water generated from these numbers in terms of treatment for discharge and reuse in the environment. Produced water treatment is very essential to the society as it facilitates better oil recovery from the reservoir, improved environmental condition and aquatic life sustainability, and also …
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The pre-treatment and pyrolysis of biomass for the production of liquids for fuels and speciality chemicals
… of certain chemicals in the pyrolysis liquid by pre-treatment of the feedstock prior to pyrolysis. For a particular biomass feedstock the pyrolysis liquid yield is affected by the reactor process parameters. It has been found that, providing the other process parameters are restricted to the …
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