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Aerobic granular sludge taken from a sequencing batch reactor at steady state was used in this study. After aerated for 1 and 4 hours at high organic loading rate, the mixed liquid suspended solids (MLSS) concentration of granular sludge increased from 1.16 g/L to 1.48 g/L and 1.56 g/L, respectively, similar to the growth process of floc-like sludge and small granules. The number per milliliter mixed...
The use of aerobic granules in wastewater treatment can reduce the land area that is needed for the treatment of sewage. Until now granulation has been mainly studied using artificial wastewater. The possibility of forming aerobic granules on domestic sewage in a sequencing batch reactor was studied on three experimental stages. By controlling organic loading of influent and surface air upflow velocity,...
The cultivation of aerobic granular sludge used for simultaneous nitrification and denitrification (SND) in sequencing batch airlift reactor (SBAR) fed with synthetic municipal wastewater was investigated. The results showed that the aerobic granular sludge with the ability of simultaneous nitrification and denitrification could form in the reactor in a short time (35d) due to better shear force and...
Swimming bed combined with aerobic granular sludge as a novel technology for domestic sewage treatment was developed in this study, which was on the basis of the biofilm process and activated sludge process. The on-way variation of COD and NH4+-N was studied at different hydraulic retention time (HRT). The results show that the concentrations of COD and NH4+-N go down during the treatment flow, and...
Performances for the treatment of normal molasses wastewater between ABR (Anaerobic Baffled Reactor) and SBAR (Sequencing Batch Airlift Reactor) were discussed in this study. The continuous fermentative ABR contained four tanks of same size with the total effective volume of 34.60 L, and of 5.4 L to SBAR. With the COD of 8000 mg/L, much resource biogas were obtained, the COD removal efficiency was...
In this study, aerobic granular sludge was cultivated with the effluent of anaerobic baffled reactor (ABR) which degraded berberine wastewater. After 80-day operation, stable granules with sizes of 2-10 mm were obtained. With the granulation, the SVI value decreased from 120 to 20.34 mL/g. The granular sludge had an excellent settling ability with the settling velocity over 104 m/h. Aerobic granular...
A submerged membrane bioreactor (MBR) combined with aerobic granular sludge (AGS) was studied in this research, in order to enhance removal performance containing higher concentration of organic solids, nitrogen and phosphorus than conventional biological phosphorus removal process. Aerobic granular sludge technology offered a possibility of simultaneous COD, nitrogen and phosphate removal in one...
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