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Isolation and characterization of a strain with high microbial attachment in aerobic granular sludge

Journal of Environmental Sciences 2021年第8期33卷 194-203页

作者： Tingting Zhao Kai Qiao Lei Wang Wei Zhang Wei Meng Fan Liu Xu Gao Jianrong Zhu School of Environment Beijing Normal UniversityBeijing 100875China State Key Laboratory of Water Simulation Beijing 100875China R&D Centre of Aerobic Granule Technology Beijing 100875China

Aerobic granule is a special microbial aggregate associated with biofilm *** formation of aerobic granular sludge is primarily depending on its bacterial community and relevant microbiological *** this experiment,a strain with high microbial attachment was isolated from aerobic granular sludge,and the detailed characteristics were *** high attachment ability could reach 2.34(OD600 nm),while other low attachment values were only around 0.06-0.32,which indicated a big variation among the different *** strain exhibited a very special morphology with many fibric fingers under SEM observation.A distinctive behaviour was to form a spherical particle by themselves,which would be very beneficial for the formation and development of granular *** EPS measurement showed that its PN content was higher than low attachment bacteria,and 3 DEEM confirmed that there were some different *** on the 16 S rRNA analysis,it was identified to mostly belong to *** augmentation to particle sludge cultivation demonstrated that the strain could significantly promote the formation of aerobic ***,it was strongly suggested that it might be used as a good and potential model strain or chassis organism for the aerobic granular sludge formation and development.

关键词： Bacterial isolates microbial attachment Aerobic granular sludge Biofilm 16S rRNA

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Improving zinc recovery by thermoacidophilic archaeon Acidianus copahuensis using tetrathionate

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Transactions of Nonferrous Metals Society of China 2016年第11期26卷 3004-3014页

作者： Camila CASTRO Edgardo R.DONATI CINDEFI (CCT La Plata-CONICET UNLP) Facultad de Ciencias Exactas Universidad Nacional de La Plata (UNLP)

The attachment and bioleaching experiments were conducted to evaluate the zinc recovery from Hualilan ore by thethermoacidophilic archaeon Acidianus copahuensis. Cells of this species pregrown on tetrathionate showed higher capability ofattachment to the ore than cells pregrown on other energy sources and such attachment seemed to be mediated by the product ofextracellular polymeric substances. A. copahuensis achieved a successful bioleaching of the ore reaching 100% of zinc recoverywhen tetrathionate was added. Simultaneous addition of yeast extract and tetrathionate maintained the zinc extraction at higher *** dissolution kinetics was controlled by chemical reaction in cultures with the external addition of tetrathionate but by thediffusion through a product layer of jarosite in the other cultures.

关键词： bioleaching zinc tetrathionate microbial attachment Acidianus copahuensis thermophiles

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