Investigación transdisciplinaria e investigación-acción participativa

Anaerobic digestion is the most widely process used for the stabilisation of wastewater treatment sludge. Organic matter is transformed into CH4 and CO2 by the action of different bacteria groups. The main advantages are the reduction of the volume of waste sludge and the production of methane gas that can be utilized as energy supply for the process. During anaerobic digestion of activated sludge from enhanced biological phosphorus removal process (EBPR-process), most of the phosphorus eliminated during the water treatment, as well as that from cellular lysis, is released. So that,...

La historia de Joy Adamson sobre un cachorro de leona en transición entre el cautiverio en el que se cría y la temible vida salvaje a la que regresa captura las habilidades tanto de los humanos como de los animales para cruzar la brecha aparentemente insuperable entre dos mundos radicalmente diferentes. Especialmente ahora, en un momento en que la santidad de la naturaleza y sus habitantes se ve cada vez más amenazada por el desarrollo humano y el desastre natural, el extraordinario relato de Adamson es un idilio al que volver una y otra vez. Ilustrado con las mismas hermosas y evocadoras...

Ocho días de navegación recoriendo río arriba el bajo y medio Orinoco en un bote de goma, acampando donde diera la noche en sus orillas o arenosas islas y explorando uno de los ríos más largos, caudalosos, limpios y solitarios del planeta.

Discusses the history of the U.S. Bureau of Reclamation's operation and management of the Colorado River on behalf of the Secretary of the Interior from 1979 through 2008. Details the political, legal, institutional, and other instruments developed to address pressing issues faced by Colorado River Basin water users and managers. Reflective of its era, the 2008 volume has an increased focus on coordinated operations of the river in both the Upper and Lower Basins, on environmental matters, on the relationship with Mexico, and on Native American water settlements.