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Abstract

Two different porous ceramic carriers with immobilized activated sludge comprised a stationary filling of the reactors. Municipal wastewater was treated at hydraulic retention times from 15 to 70 min and internal circulation capacity of 20, 40 and 60 drn':h'. Depending on hydraulic retention time, the sludge yield ranged from 0.138 to 0.066 g TSS·g COD·' in reactor I and from 0.175 to 0.107 g TSS·g COD·' in reactor li. An increase in volumetric loading rate and internal circulation capacity caused a reduction in sludge yield. A decrease in the sludge yield corresponded to an increase in the ratio of endogenous to substrate respiration by the immobilized biomass
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Authors and Affiliations

Magdalena Zielińska
Irena Wojnowska-Baryła

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