This database contains bibliographic descriptions of all Wageningen University PhD theses from 1920 onwards. It is updated on a daily basis by WUR Library.
Author abstracts and/or summaries are added to all descriptions. A link to the full text dissertation is added to the bibliographic description. In a few cases, no electronic version is available, mostly because of copyright issues.
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Abstract: Many industries, such as leather tanning, agro-food, fisheries, petroleum, petrochemical and textile dyeing industries generate highly polluted saline wastewater. It is estimated that approximately 5% of the globally generated wastewater is hypersaline (salinity above 3.5%). For example, it has been assessed that the petroleum industry alone already generates approximately 39.5 million m3 of wastewater per day. Because salts have a negative effect on microbial activity, biological treatment processes usually are not considered for such wastewaters. Such wastewater streams therefore are generally treated with physical-chemical processes. However, physical-chemical methods are energy intensive and require a lot of chemicals. Hence, there is a need to explore possibilities to replace them by more sustainable biological treatment methods. In particular anaerobic biological treatment should be considered because it: i) converts the organic pollutants in the wastewater into energy-rich biogas, consisting mainly of CH4 and CO2; ii) only requires a small amount of energy for operation; iii) produces a small amount of bio-solids requiring further disposal.
Abstract: This dissertation investigates the interactional effects of Dutch plant science experts' talk in different interaction settings: public meetings, expert board meetings and ethnographic interviews. The main research approach deployed is discursive psychology : a methodology that focuses not on what is said but on what is accomplished with talk. The central topic of all the talk analysed in this thesis is Phytophthora Infestans: a major plant disease in staple crops that helped bring about the Irish famine in the 19th century. Phytophthora is still a large problem. To fight Phytophthora, plant experts have been developing different technologies, some of which, such as genetic modification, are met with public controversy.
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