Respirometric evaluation of the biodegradability of confectionary wastewaters

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Abstract
Confectionary effluents are typical examples of strong wastes of biodegradable nature, quite suitable for respirometric analysis. Three different confectionary effluents bave been subjected to a treatability-oriented characterization, mainly by means of respirometric methods, yielding meaningful results on COD fractionation and significant kinetic coefficients. Experimental values have been tested by a multi-component mathematical model using the endogenous decay approach and hydrolysis rate constants corresponding to the slowly biodegradable COD fractions have been evaluated using curve fitting.

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