A general agreement on commodity organization : A ‘GATT for primary commodities’

Having reponded to various crises since the Paris Sugar Convention 1864, the process of international commodity organization is now recognized as a positive means of securing expansion of world trade and of bringing about development in producing countries. But these objectives necessitate multi-dimensional measures. The supply-management techniques, hitherto the pivot of international commodity agreements, have proved to be inadequate. It is argued in this article that the trade and development objectives can be better achieved by the provision of varied measures; that a ‘GATT for primary commodities’ is among such measures; and that such an organization does not negate, but supplements, the existing system.     

Application of membrane bioreactor technology for wastewater treatment and reuse in the Mediterranean region: Focusing on removal efficiency of non-conventional pollutants

The Mediterranean Region is a semi-arid area whose land is facing serious erosion, causing adverse impacts on agriculture. To improve the water availability, researchers have proposed the reclamation and reuse of treated wastewater. In this paper, we report the main findings of 10 years of research on the efficiencies of a conventional activated sludge process and a submerged membrane bioreactor, with particular emphasis on the removal of non-conventional pollutants. The studies showed that the membrane bioreactor produced a virtually solids-free, high-quality permeate: most nutrients, heavy metals, and persistent organic pollutants were removed, and in particular, dioxins, furans, and polychlorinated biphenyls were typically present at concentrations below the detection limit. Moreover, the total coliforms count decreased by 4–5 log and Escherichia coli was absent from the membrane bioreactor permeate. These results, combined with the continuing reduction of the capital and operating costs for this approach, suggest that membrane bioreactors are an increasingly cost-effective technology to produce treated effluents that are suitable for reuse.