[Cultivation of aerobic granules in a large pilot SBR with domestic sewage].

The cultivation of aerobic granules in a large pilot-scale SBR was investigated using domestic wastewater. After operation of 210 days, the granules with a diameter of 330 microm were successfully formed by seeding anaerobic digested sludge. Results showed that, during the first three months of operation under low organic load of influent, removal efficiencies of pollutants increased steadily including COD, NH(4+)-N, total nitrogen (TN) and total phosphorous (TP).

Formation, physical characteristics and microbial community structure of aerobic granules in a pilot-scale sequencing batch reactor for real wastewater treatment.

In this study, aerobic granular sludge was successfully developed in a pilot-scale sequencing batch reactor (SBR) installed on site to treat real wastewater using traditional activated sludge as inoculum. Compared with 1 or 2 months required by lab-scale reactor for aerobic granulation, it took about 400 days for activated sludge to transform into granule-dominant sludge in the pilot-scale SBR on site. Although the sludge in the reactor after 400-day operation was a mixture of flocs and granules with floc ratio ranged from 5 to 30%, sludge volume index with 5min settling (SVI5) always maintained at around 30mL/g.

[Cultivation of aerobic granules by a method of alternative feed loading].

The formation process and morphological and physicochemical properties of aerobic granules were examined in a SBR system by a method of alternative feed loading. The results showed that the aerobic granules could be quickly and effectively cultivated using the alternative feeding COD 400, 800, 1200 mg/L [feed loading 0.96, 1.

[Filamentous overgrowth in aerobic granules].

Filamentous overgrowth has been observed after aerobic granulation in shaking sequencing batch reactors (SSBR). The factors affecting the filamentous overgrowth in aerobic granules and its possible control methods were investigated. It was found that both the influent and sludge inoculation largely influenced the filamentous overgrowth in aerobic granules.

[Experimental investigation of high saline wastewater treatment using aerobic granules].

Complete aerobic granulation could be achieved in shaking sequencing batch reactors (SSBR) with saline wastewater respectively inoculated conventional activated sludge and anaerobic granules. Pretty good specific TOC removal rates could be achieved without inoculating the halo-bacteria at the start-up time. When the salinity was less than 10 g/L NaCl with the synthetic glucose-rich wastewater as substitute, the TOC removal efficiency was in the range of 70.