Suchergebnisse

One of the striking developments in Mexican historiogra phy since 1925 is the burgeoning of the field of history of ideas or intellectual history. The movement began with Jose Ortega y Gasset & more recently the impetus has come from the influence of Jose Gaos; this study is concerned with Leopoldo Zea, one of the students of Gaos & a philosopher of rank. It analyzes a characteris tic theme in Zea's writings--the modernization of Latin Amer societies without the loss of their cultural identity--& then considers methodological problems in the history of ideas pointed up by these works. IPSA.

ABSTRACTLlangefni WwTW receives discharge from the rural town of Llangefni and the local industrial estate and to date this is the first and only BNR plant in Wales. The consents from March 2003 included a reduction in ammonia (NH4_N) to 1.5 mg/l, suspended solids to 20 mg/l (SS) and Biological Oxygen Demand (BOD) to 7 mg/l and included a new Phosphate (PO4_P) standard of 2 mg/l. The process selected to meet the new consents was Biological Nutrient Removal (BNR) and was unusual as it was for a small, rural wastewater treatment plant that receives about 26% of its flow from an industrial estate.During commissioning, the plant produced an average phosphate concentration of 1.0 mg/l and an ammonia concentration of 0.7 mg/l. It was confirmed that to achieve consistent phosphate removal a BOD:P ratio greater than 20:1 is required along with a high VFA (Volatile Fatty Acids) concentration of 200–300 mg/l.