Aerobic granular sludge is developed under aerobic conditions and mainly used for the aerobic degradation of organics and also for nitrogen removal under aerobic and anoxic conditions (liu et al, 2004 liu y, tay jh. Aerobic granular sludge: characterization, mechanism of granulation and application to wastewater treatment granules characteristics of aerobic granular sludge characterization, mechanism. [advances: granulation mechanism, characteristics and application of aerobic sludge granules] [article in chinese] granulation mechanism, characteristics and its microbial phase, influence of different environmental factors, granulation model and its application in treating the municipal and toxic industrial wastewater were discussed.
Aerobic granular sludge: characterization, mechanism of granulation and application to wastewater treatment 139 tay et al (2002) they determined the ic by measuring.
Previous investigations of aerobic granular systems have visualized the microbial community and aggregate structure during this start-up phase , and mathematical models have been developed to predict granule formation and growth (31, 36) while these studies provide some models for granule formation, there has been little work on understanding the details of the specific microbial aggregation mechanisms involved in the granulation process, which needs to be optimized for full-scale operation. Aerobic granular sludge can be classified as a type of self-immobilized microbial consortium, consisting mainly of aerobic and facultative bacteria and is distinct from anaerobic granular methanogenic sludge aerobic granular technology has been proposed as a promising technology for wastewater treatment, but is not yet established as a large-scale application. Aerobic granular activated sludge is a novel alternative for the treatment of wastewater and offers several operational and economic advantages over conventional floccular-sludge systems (9, 22. Aerobic granular sludge: characterization, mechanism of granulation and applic ation to wastewater treatment 141 reduces the gibbs free energy on the cell-surfaces and enhances the ability of.
For full-scale application of aerobic granular-sludge systems, the most likely strategy for the reactor start-up would be seeding with a conventional floccular sludge from the floccular seed, there is a transition period with the selection and eventual formation of granules. The characteristics of aerobic granules at steady state and the effects of starvation time on the stability of aerobic granules during characteristics and stability of aerobic granules cultivated with different starvation time authors authors and affiliations standard methods for the examination of water and wastewater, 20th edn.
Aerobic granules were cultivated in an internal-circulate sequencing batch reactor (sbr) fed with glucose as the sole carbon source as described by briefly, the reactor was fed with synthetic wastewater and operated sequentially in 6 h cycles, with 2 min of substrate filling, 355 min of aeration, 2 min of settling and 1 min of effluent withdraw. As aerobic granules have a unique structure and characteristics, it is hard to measure the reaction process inside the granules by conventional analytical methods or tools in recent years, several innovative methods and tools have been developed or tested for the characterization of aerobic granular sludge. The formation and characteristics of aerobic granules were investigated, and the following conclusions can be drawn: 1 aerobic granular sludge can be cultivated in an aerobic sbr by seeding anaerobic granules.
Aerobic granular sludge can be classified as a type of self-immobilized microbial consortium, consisting mainly of aerobic and facultative bacteria and is distinct from anaerobic granular. Aerobic granules are mainly used for the aerobic degradation of organics as well as nutrients removal under aerobic and anoxic conditions in sequencing batch reactor (sbr) [3 dw gao, l liu, h liang, wm wu, aerobic granular sludge: characterization, mechanism of granulation and application to wastewater treatment, crit rev biotechnol 31 (2011) 137 – 152 103109/073885512010497961 [taylor & francis online], [web of science ®] [google scholar]. Eps mainly consist of polysac- 21 cultivation and storage of aerobic granules charides (ps) and proteins (pn) in our previous work, eps played an important role in the binding of zn(ii) and co(ii) to aerobic gran- aerobic granules were cultivated in an internal-circulate ules [10.
Aerobic granules have been cultured mainly in sequenced batch reactors (sbr) under hydraulic selection pressure the factors influencing aerobic granulation, granulation mechanisms, microbial communities and the potential applications for the treatment of various wastewaters have been studied comprehensively on the laboratory-scale. Hence, granule size is an eminent factor in molding the physical performance and characteristics of aerobic granules the average diameter of inoculated anaerobic granules was about 11 mm. This review provides recent advances on aerobic biogranulation technology and application granulation mechanism, characteristics and its microbial phase, influence of different environmental factors, granulation model and its application in treating the municipal and toxic industrial wastewater were discussed.