期刊
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
卷 18, 期 12, 页码 -出版社
MDPI
DOI: 10.3390/ijerph18126348
关键词
biofilm; bioremediation; community structure; fungi; wastewater treatment
资金
- MANUNET III Programme
- Regione Toscana [MNET17/ENER-1143]
This study demonstrated that a microbial community dominated by fungi could be successfully maintained in a pilot-scale packed-bed reactor fed with tannery wastewater under non-sterile conditions. The reactor, inoculated with a pure culture of Aspergillus tubingensis and Quebracho tannin as sole carbon source during start-up, achieved significant removal of COD and DOC from the tannery wastewater. The evolution of the microbial consortium and its adaptation to the support media size were examined throughout the experiment.
This study demonstrated that a microbial community dominated by fungi can be selected and maintained in the long-term under non-sterile conditions, in a pilot-scale packed-bed reactor fed with tannery wastewater. During the start-up phase, the reactor, filled with 0.6 m(3) of polyurethane foam cubes, was inoculated with a pure culture of Aspergillus tubingensis and Quebracho tannin, a recalcitrant compound widely used by tannery industry, was used as sole carbon source in the feeding. During the start-up, fungi grew attached as biofilm in carriers that filled the packed-bed reactor. Subsequently, the reactor was tested for the removal of chemical oxygen demand (COD) from an exhaust tanning bath collected from tanneries. The entire experiment lasted 121 days and average removals of 29% and 23% of COD and dissolved organic carbon (DOC) from the tannins bath were achieved, respectively. The evolution of the microbial consortium (bacteria and fungi) was described through biomolecular analyses along the experiment and also developed as a function of the size of the support media.
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