6533b7cffe1ef96bd1258602

RESEARCH PRODUCT

Effect of extended famine conditions on aerobic granular sludge stability in the treatment of brewery wastewater

Santo Fabio CorsinoAlessandro Di BiaseTanner R. DevlinGiulio MunzMichele TorregrossaJan A. Oleszkiewicz

subject

Environmental Engineering0208 environmental biotechnologySewageBioengineering02 engineering and technologyBiological Oxygen Demand AnalysisWastewater010501 environmental sciencesWaste Disposal Fluid01 natural sciencesIndustrial wastewater treatmentBioreactorsExtracellular polymeric substanceBioreactorFood IndustryWaste Management and Disposal0105 earth and related environmental sciencesBiological Oxygen Demand AnalysisSettore ICAR/03 - Ingegneria Sanitaria-AmbientaleBacteriaSewageRenewable Energy Sustainability and the Environmentbusiness.industryChemistryGranule (cell biology)Environmental engineeringGeneral MedicinePulp and paper industryAerobiosisCarbon020801 environmental engineeringWastewaterExtracellular polymeric substances Feast/famine Aerobic granular sludge Industrial wastewater StabilityFaminebusiness

description

Results obtained from three aerobic granular sludge reactors treating brewery wastewater are presented. Reactors were operated for 60 d days in each of the two periods under different cycle duration: (Period I) short 6 h cycle, and (Period II) long 12 h cycle. Organic loading rates (OLR) varying from 0.7 kg COD m-3 d-1 to 4.1 kg COD m-3 d-1 were tested. During Period I, granules successfully developed in all reactors, however, results revealed that the feast and famine periods were not balanced and the granular structure deteriorated and became irregular. During Period II at decreased 12 h cycle time, granules were observed to develop again with superior structural stability compared to the short 6 h cycle time, suggesting that a longer starvation phase enhanced production of proteinaceous EPS. Overall, the extended famine conditions encouraged granule stability, likely because long starvation period favours bacteria capable of storage of energy compounds.

yearjournalcountryeditionlanguage
2017-02-01Bioresource Technology
https://doi.org/10.1016/j.biortech.2016.12.026