[Influence of flocculant bacterium on characteristics of aerobic granular sludge].
The aerobic granular sludge was cultivated by adding flocculant bacteria in sequencing batch airlift reactor (SBAR), the physical-chemical properties and biodegradation effect of granules were studied so as to investigate the influence of flocculant bacterium on characteristics of aerobic granular sludge. The results showed that flocculant bacterium could prompt granulation process, the aerobic granules could be successfully cultivated when the dose of flocculants was between 0-20 mL/L. The optimum dose was 10 mL/L, in this case the formation of aerobic granules needed 35d which was faster than that of 42 d in blank experiment, and SVI was around 40 mL/g, settling velocity reached 35.82 m/h, the COD, NH4+ -N,TP removal rate of mature granular sludge were 97.14%, 84.49% and 87.59% respectively. While no granules formed when the dose of flocculants was 30 mL/L, some white flocs existed in SBAR.
Song
Zhi-wei
ZW
School of Resource and Environmental Engineering, Heilongjiang Institute of Science and Technology, Harbin 150027, China. szwcyp@tom.com
Tong
Long-yan
LY
Pan
Yue-jun
YJ
Ren
Nan-qi
NQ
D000332:Aerobiosis; D001419:Bacteria / Q000254:growth & development / Q000378:metabolism*; D001673:Biodegradation, Environmental; D019149:Bioreactors / Q000382:microbiology*; D005427:Flocculation; D009930:Organic Chemicals / Q000302:isolation & purification / Q000378:metabolism; D012722:Sewage / Q000382:microbiology*; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification / Q000378:metabolism
D009930:Organic Chemicals; D012722:Sewage; D014874:Water Pollutants, Chemical