Sizedependent calcium carbonate precipitation induced
1/2/2016#0183;#32;Further analysis of mineral in granules with different sizes by XRD showed that calcium existed in the form of calcium carbonate in aerobic granules and aragonite was the only detected mineral in aerobic granule with size bigger than 300 m as shown in Fig. 5. It also needs to be pointed out that XRD is unable to detect amorphous inorganic precipitates, so there is possibility that calcium carbonate