期刊
BIOFOULING
卷 29, 期 9, 页码 1043-1055出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/08927014.2013.825901
关键词
Calgary Biofilm Device; Pleurotus ostreatus; biofilm; chromium toxicity; ultrastructure; wastewater treatment
资金
- Ministero dell'Istruzione dell'Universia e della Ricerca (MIUR) [2008P7K379]
The MBECTM-High Throughput Assay based on the Calgary Biofilm Device was used to produce and to characterize Pleurotus ostreatus biofilms. Hydroxyapatite coating of pegs was required to enable biofilm attachment; biofilm amounts and homogeneity of distribution were markedly improved upon removal of non-sessile biomass after 48h from inoculation. Scanning electron microscopy showed surface-associated and multi-layered growth stabilized by the presence of an extracellular matrix (ECM). Biofilms had higher contents of total sugars and ECM than their free-floating counterparts. Tolerance to Cr(VI) in the former was about twice that of the latter as inferred by the respective inhibitory concentrations (48.4 vs 24.1mM and 114.5 vs 61.0mM in 4- and 7-d-old cultures, respectively). Biofilms also displayed superior olive-mill wastewater (OMW) treatment efficiency along 5 consecutive batches leading to chemical oxygen demand and total phenol removals higher than 50 and 90%, respectively. Laccase activity peaks in biofilm cultures grown on OMW were significantly higher than those in free-floating cultures.
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