Granule Development in Anaerobic Baffled Reactors

Authors : Sinan UYANIK

Pages : 131-144

View : 17 | Download : 13

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :The mechanism of biomass granulation in anaerobic reactors has been widely studied in the hope that this could be helpful in manupulating the rate and extent of granule formation, particularly in wastewaters that show little intrinsic propensity to granulate insert ignore into journalissuearticles values(e.g. fat and oil containing effluents);. Similarly, in this study, sets of sludge samples were taken from Normal Fed Anaerobic Baffled Reactors insert ignore into journalissuearticles values(NFABRs); and Split-Fed Anaerobic Baffled Reactors insert ignore into journalissuearticles values(SFABRs); treating brewery and ice-cream wastewater in order to evaluate the development of granulation and compare the rate of compact granule formation in the reactors. The internal architecture of the granules and the role of extracellular polymers insert ignore into journalissuearticles values(ECPs); on granule formation were also investigated. SFABRs proved to be a potential anaerobic reactor configuration for granule formation. It was revealed that the ability of granule formation in SFABRs can even extend to complex wastewaters, i.e. fat-bearing wastewaters, in a considerably short time. The mechanism governing stratification of bacterial population in granules was explained. The internal architecture of the granules and the role of ECPs on granule formation were speculated on with the changes observed on SEM pictures. The findings confirmed that ECPs are central to the process of granulation. Based on the granular growth course, the granulation process is categorized into three phases: insert ignore into journalissuearticles values(i); initiation insert ignore into journalissuearticles values(ii); adaptation and maturation and insert ignore into journalissuearticles values(iii); granulation.
Keywords : Anaerobic baffled reactor ABR, Split fed anaerobic baffled reactor SFABR, Granule development, Extracellular polymers