The application of volumetric coagulation for preliminary fat industry waste treatment
Michel, M.M.(Szkola Glowna Gospodarstwa Wiejskiego, Warszawa (Poland). Katedra Budownictwa i Geodezji) | Orzeszko, A.(Szkola Glowna Gospodarstwa Wiejskiego, Warszawa (Poland). Katedra Chemii)
Fat industry waste contains excessive load of impurities such as greases, free fatty acids as well as sulfate ions. For their primary treatment, in this paper, ten coagulants were used. The first examination was the so-called Jar-Test, by means of which the most potent agents i.e. Zetag 7635, Magnasol 5389 and PIX-113, respectively, were selected. Then, the efficiency of these coagulants in waste treatment was studied. Three main parameters: COD, amounts of hexane extractive substances and (SO4)2- concentration were determinate. It was found that the aforementioned coagulants reduced the COD parameter, as well as the amounts of dispersive greases and free fatty acids significantly. Unfortunately, the problem of the removal of sulfates remains still unsolved
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