Influence of XXXX source on nutrient removal performance and physical-chemical characteristics of aerobic granular sludge.

@entity1568 @entity26 @entity598 @entity1507 @entity16764 @entity505 @entity3151
The impact of @entity505 source variation on the physical and chemical characteristics of aerobic granular sludge and its biological nutrient ( @entity1568 and @entity3151 ) removal performance was investigated. Two identical sequencing batch reactors, R1 and R2, were set up. Granular biomass was cultivated to maturity using @entity598 -based synthetic wastewater. After mature granules in both reactors with simultaneous chemical @entity26 demand (COD), @entity16764 and @entity3151 removal capability were achieved, the feed of R2 was changed to municipal wastewater and R1 was continued on synthetic feed as control. Biological @entity3151 removal was completely inhibited in R2 due to lack of readily biodegradable COD; however, the biomass maintained high @entity16764 and COD removal efficiencies. The disintegration of the granules in R2 occurred during the first two weeks after the change of feed, but it did not have significant impacts on settling properties of the sludge. Re-granulation of the biomass in R2 was then observed within 30 d after granules' disintegration when the biomass acclimated to the new substrate. The granular biomass in R1 and R2 maintained a Sludge Volume Index close to 60 and 47 mL g(-1), respectively, during the experimental period. It was concluded that changing the @entity505 source from readily biodegradable @entity598 to the more complex ones present in municipal wastewater did not have significant impacts on aerobic granular sludge characteristics; it particularly did not affect its settling properties. However, sufficient readily biodegradable @entity505 would have to be provided to maintain simultaneous biological @entity1507 and @entity3151 removal.
