Evaluation of the effectiveness of immobilization of activated sludge on composite materials “polyethylene:polysaccharides”

The aim of this work is to study the immobilization ability of new composite materials based on polyethylene (PE) and polysaccharides (PS) in relation to the biocenosis of activated sludge (AS). The objects of the study were selected composite materials of the following composition: PE : pure microcellulose (MCc), PE : waste microcellulose (MCw), PE : starch (ST), at a ratio of components PE : PS = 70:30 wt.%. The objectives of the study were to determine the main morphological parameters of new composites (porosity, roughness, density), assessment of hydrochemical and hydrobiological state of AS (silt index, mass concentration of silt, species composition) until it locks into composites, assessment of the immobilization ability of the studied materials by biomass weight gain, monitoring of the state of AS after fixing. The tests found that the composite of structure of PE : MCc of has a density of 410 kg/m3 and a porosity of 60%, the roughness of 3.5; the composite of structure of PE : MCw has a density of 590 kg/m3 and a porosity of 40%, roughness of 2...