Alga-lysing bioreactor and dominant bacteria strain
PEI Hai-yan , HU Wen-rong , MU Rui-min , LI Xiao-cai
DOI:
Received May 30, 2006,Revised October 10, 2006, Accepted , Available online
Volume 19,2007,Pages 546-552
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Alga-lysing bacteria have been paid much attention to in recent years. In this study, the alga-lysing strain P05 which was isolated
from an immobilizing biosystem was immobilized by coke and elastic filler, forming two biological reactors. The removal e ciencies
of algae, NH4+-N and organic matter using the two reactors were studied. The results showed that strain P05 was an ideal algal-lysing
bacteria strain because it was easy to be immobilized by coke and elastic filler which are of cheap, low biodegradability and the simple
immobilization procedure. After 7 d filming, the biological film could be formed and the reactors were used to treat the eutrophic water.
These two reactors were of stability and high e ect with low cost and easy operation. The optimal hydraulic retention time of each
reactor was 4 h. The algae removal rates were 80.38% and 82.1% (in term of Chl-a) of coke reactor and filler reactor, respectively.
And that of NH4+-N were 52.3% and 52.7%. The removal rates of CODMn were 39.03% and 39.64%. The strain P05 was identified as
Bacillus sp. by PCR amplification of the 16S rRNA gene, BLAST analysis, and comparison with sequences in the GenBank nucleotide
database.
