خيارات البحث
النتائج 1 - 6 من 6
Overhauling health effects perspectives.
1988
Schwebach G.H. | Cafaro D. | Egan J. | Grimes M. | Michael G.
Impact of liquid wastes on surface and groundwater resources and their elimination through proper treatment and reuse
1991
Hartmann, L. (Karlsruhe Univ., Karlsruhe (Germany). Institute for Bioengineering and Technology of Wastewater)
A short historical review shows that treatment plants have been developed only after problems have occurred. The high diversity pollutants of totally different origins and natures, and chemical and biological characteristics require different tools. A good approach is to select one basic tool and try to integrate tools for other tasks within this main tool. The main tool will be in almost every case (for municipal wastewaters) an activated sludge plant surrounded by other elements of polishing or for the elimination of nitrogen, phosphorus, etc., according to the local situation. Some tasks like elimination of pathogens or eggs of intestinal worms, are automatically performed to a high degree in connection with the task of eliminating degradable organics. Special wastewaters with certain pollutants have to be treated at the place of their origins. For wastewater of agricultural production direct or indirect recycling should be favoured. For wastewater of industrial background containing toxicants, treatment must be economically included in the production process of the main product. Besides this, there appears a multitude of organics of unknown chemical composition and environmental significance. They should be permitted for public application only after lab tests have proved their degradability and the conditions of their degradation. Finally, one should always be aware that treatment plants have to be composed according to local conditions. Depending on the amount and composition of wastes, an integration of tool has to be found that not only meets the demands stemming from the wastewaters but also can be integrated into the existing economical and ecological frame
اظهر المزيد [+] اقل [-]Recovery of valuable nitrogen compounds from agricultural liquid wastes: potential possibilities, bottlenecks and future technological challenges
1998
Rulkens, W.H. | Klapwijk, A. | Willers, H.C. (Wageningen Agricultural University (WAU), Wageningen (Netherlands))
Aquaculture in warm brewery effluents: a way to upgrade the used waters, the waste-heat and by-products [fish culture, in Belgium with African catfish and European eel]
1993
Vriens, L. | Muylder, E. de (Seghers Engineering, Willebroek (Belgium)) | Eyben, D.
Anaerobic treatment of wastewater from yeast manufacturing in UASB Upflow Anaerobic Sludge Blanket factories at laboratory and pilot plant scale
1994
Vinas, M. | Martinez, J. | Borzacconi, L. | Hernandez, A. | Mallo, M. (Instituto de Ingenieria Quimica, Montevideo (Uruguay). Facultad de Ingenieria)
Biogas technology of livestock manure treatment for environment protection in Shanghai
1994
Wang Mengjie | Jin Yao
