In a series of effluent treatment gross of the ethanol by processes of precipitation with hydroxides of alkali metals and iron salts and sedimentau00c7u00c3o areas

摘要

This invenu00c7u00c3o refers to a series of effluent treatment in gross of the ethanol produced from sugarcane sugar.It combines chemical precipitation with acquisition rapid (2) of concentrated solutions of hydroxides of alkali metals (calcium hydroxide or sodium) (1); training instantu00c2nea clusters insolu00davBehold, carbonates and hydroxides of metals with organic particulate; sedimentau00c7u00c3o by zones of clusters which is insoluble (3); followed by precipitation by acquisition rapid (5) of iron salts in the formSu00d3lida like iron chloride or iron sulphate (4); training for 2 minutes of clusters of iron hydroxides; and sedimentau00c7u00c3o by areas of the precipitated iron (6).This treatment reduced the contamination of effluent in terms of organic matter, calcium, magnesium, sodium, potassium, phosphorus, nitrogen, volatile solids, and absorvu00c2ncias characteristics.There is the training of two kinds of precipitate with high content of organic matter, calcium, magnesium, potassium and phosphorus.