How social enterprises can contribute to the Sustainable Development Goals (SDGs) – A conceptual framework

In the recent 2015 report by Social Enterprise UK - Think Global Trade Social - it is argued that social enterprises have an important role to play in the achievement of the UN’s new Sustainable Development Goals (SDGs). However, with 17 SDGs and no less than 169 associated targets, understanding how social enterprises can contribute to the achievement of these goals remains challenging. Particularly given the diversity of social enterprise models that exist globally. This chapter contributes towards addressing this problem by introducing a framework for conceptualising how social enterprises can contribute to the SDGs, illustrated with global examples. The chapter begins by reviewing what has been written about social enterprises and the SDGs. This is followed by the development and presentation of the conceptual framework. Finally, conclusions and areas for future research on social enterprises and the SDGs are identified

Etude des sollicitations et des mouvements tourbillonnaires autour des colonnes d'une plate forme océanique sous l'action de courants alternés

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Forty years with the phosphate industry

Paper read before The Fertiliser Society, London (GB), 26 Apr 1995Available from British Library Document Supply Centre- DSC:6700.2(362) / BLDSC - British Library Document Supply CentreSIGLEGBUnited Kingdo

Phosphorus:Reserves, production, and applications

The demand of phosphate fertilizers is growing as a result of a rising population, changing human diets resulting in the increasing (meat) consumption per capita, and an expansion in the production of biofuels. Besides the fertilizer industry, there is a steady growth of using phosphorus compounds in the chemical industry for applications in, e.g., soft drinks, pharmaceuticals, and flame retardants. To meet this growth, it is important to know if the P reserves are sufficient and what kind of processes are used to produce such phosphorus compounds. Reserves are not equally spread around the world, with three-quarters located in Morocco and The Western Sahara. Prices can be volatile, as shown in 2008 with an eightfold price increase. Moreover, the estimated time till depletion of phosphate rock differs substantially between several studies. Therefore, phosphate rock was added on the critical material list of the European Commission. An important aspect for the processing of phosphate rock is the quality of the rock, which is dependent on the ore type (sedimentary or igneous), level of radioactivity, and hazardous metal contents. The main intermediary compounds for phosphorus products are phosphoric acid and white phosphorus. About 95% of the phosphoric acid is made via the wet process: acidulation of phosphate rock to create wet phosphoric acid and the main by-products phosphogypsum and hydrogen fluoride. The purity and thus the reusability of phosphogypsum are dependent on the type of digestion process. However, at the moment, reusing phosphogypsum is not a common practice. Wet phosphoric acid can be purified via several processes. The most common processes are extraction and precipitation. Via extraction, wet phosphoric acid can be purified up to phosphoric acid comparable to that produced with the thermal process. Separation of specific compounds can be done through precipitation. Additionally, cationic impurities can be removed via precipitation, but the product will then be changed into a phosphate salt, which is unfavorable for its use in industrial applications

Conceptions of Social Enterprise in Europe: A Comparative Perspective with the United States

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