Abstract

RODRIGUEZ, Jenny; MANUNGA, Tatiana  and  CARDENAS, Cristian. EFFECT OF ORGANIC MATTER FRACTIONS ON THE PERFORMANCE OF A PULP AND PAPER MILL wASTEwATER TREATMENT SYSTEM. rev.udcaactual.divulg.cient. [online]. 2012, vol.15, n.2, pp.447-455. ISSN 0123-4226.

Slowly biodegradable organic matter represents the bulk of organic matter content of pulp and paper mill wastewater which can influence the performance of treatment systems. The organic matter fractionation is a useful tool that generates information for optimize treatment processes of wastewater. Organic matter fractionation study was carried out. Biodegradable soluble, biodegradable particulate, non- biodegradable soluble and non-biodegradable particulate fractions were identifies in effluents of primary clarifier, facultative aerated pond and sedimentation pond. Results of this study show that organic matter non-biodegradable/ total organic matter ratios of the influent were 69% while biodegradable fraction was 31%. Primary clarifier removed significantly the non-biodegradable fraction it was key for biological treatment. The biodegradable soluble fraction was mostly removed in facultative aerated pond (44% to 12%). The effluent was polished in the sedimentation pond, mainly particulate organic matter fraction. Only a small percentage of non-biodegradable organic matter was adsorbed by facultative aerated pond biomass, the fraction of this organic matter accounted for 19% in the influent and increased to 45% in the effluent.

Keywords : COD fractions; organic matter; particulate COD; soluble COD; paper mill wastewater.

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