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Raceway pond cultivation of a new Arthrospira ***-S1 in digested piggery wastewater treated by MBR and ozonation

International Journal of Agricultural and Biological Engineering 2017年第1期10卷 115-124页

作者： Liu Rui Yu Qiangqiang Guo Qingqing Zheng Wei Wang Genrong Chen Lujun Zhejiang Provincial Key Laboratory of Water Science and Technology Department of Environment in Yangtze Delta Region Institute of Tsinghua UniversityJiaxingZhejiang 314006China Nanhu Agricultural Economical Bureau JiaxingZhejiang 314000China School of Environment Tsinghua UniversityBeijing 100084China

A new Arthrospira strain named Arthrospira ***-S1 was isolated from a local digested piggery wastewater(DPW)storage pool in Jiaxing City,Zhejiang Province,*** possessed good stain resistance against contaminants in DPW,which was pretreated with a membrane bioreactor(MBR).The strain was identified as Arthrospira platensis(***)based on its morphological characteristics and the 16S rDNA sequencing *** effect of chrominance on growth of *** ZJWST-S1 was investigated in a field raceway pond filled with MBR effluent or MBR effluent decolorized with *** ozonation,the chrominance of MBR effluent was decreased from 700 mg Pt/L to 150 mg Pt/*** runs of cultivation showed that *** ZJWST-S1 grew faster in the ozone decolorized MBR effluent,the averaged biomass concentration being 0.907 g/L after 10 days of cultivation,close to that in a Zarrouk medium(0.969 g/L).By comparison,the biomass grew much slower in the non-decolorized MBR effluent(0.624 g/L).The pollutant removal was also benefited from the accelerative growth of *** ZJWST-S1 in the decolorized MBR *** all ammonium,61.2%of nitrate and 68.1%of phosphate were removed by the *** ZJWST-S1 in the decolorized MBR effluent,much higher than the corresponding values of almost all ammonium,25.4%of nitrate and 36.5%of phosphate in the MBR ***,the Arthrospira biomass harvested from the ozone decolorized MBR effluent after 10 d cultivation was with crude protein content of 59.1%±3.5%in dry algae *** content of Pb,As,Cd and Hg in biomass was also low enough to meet the Chinese Arthrospira Standard for Animal Feed(GB/T 17243-1998).This study showed that the new strain *** ZJWST-S1 possessed potential to be used for producing animal feed and simultaneous removal of nitrogen and phosphorus in DPW.

关键词： digested piggery wastewater(DPW) ozone decolorization Arthrospira platensis 16S rDNA nitrogen and phosphorus recovery

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