Journal Title
Title of Journal: Water Air Soil Pollut Focus
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Abbravation: Water, Air, & Soil Pollution: Focus
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Publisher
Springer Netherlands
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Authors: YuanCai Chen CheJen Lin HongLei Chen ShiYu Fu HuaiYu Zhan
Publish Date: 2009/09/30
Volume: 9, Issue: 3-4, Pages: 213-221
Abstract
This study investigated sludge granulation inoculated with various mixtures of aerobic and anaerobic sludge at low dissolved oxygen DO 03–06 mg/l or aerobic 25 mg/l conditions in four parallel flow reactor systems Formation of highdensity coupled granules was achieved in the reactor system inoculated with anaerobic and aerobic sludge seeds 11 mass ratio at low DO concentrations with a mean size of 25 mm after only 27 days of cultivation The highest ratio of protein PN to polysaccharide PS 33 was observed for the coupled sludge compared to granules cultivated under aerobic conditions The PN/PS ratio correlated well with high hydrophobicity low sludge volumetric index and compact granular structure Activity tests of the specific anaerobic and aerobic biomass confirmed that anaerobes and aerobes coexisted in the same coupled granule Based on the optical microscopic and SEM observations the process of coupled granule formation was proposed
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