RESUMO
The production of methanol from agricultural, forestry, livestock, poultry, and fishery waste via pyrolysis was investigated. Pyrolysis was conducted in a tube furnace at 450-500 °C. Sugarcane bagasse showed the methanol production (5.93 wt.%), followed by roots and sawdust with 4.36 and 4.22 wt.%, respectively. Animal waste offered the lowest content of methanol, as only 0.46, 0.80, and 0.61 wt.% were obtained from fishery, goat, and cow waste, respectively. It was also observed that the percentage of methanol increased with an increase in volatile compounds while the percentage of ethanol increased with the percentage of ash and fix carbon. The data indicate that, pyrolysis is a means for production of methanol and ethanol after further optimization of the process and sample treatment.
Assuntos
Biomassa , Etanol/síntese química , Incineração/métodos , Metanol/síntese química , Plantas/química , Eliminação de Resíduos/métodos , Esgotos/química , Resíduos Industriais/prevenção & controleRESUMO
Nine hundred and thirty three students of Dacca University were examined: mean haemoglobin levels were 80.5 per cent for men and 70.0 per cent for women. Five hundred and thirty three (57.3%) of the students had single or multiple intestinal parasitic infections, of which Ascaris lumbricoides (366), Entamoeba histolytica (113) and Trichuris trichiura (99) were the commonest. It is suggested that chronic nutritional deficiencies are compounded by these parasites, leading to low weights, and low haemoglobins.
