He Liu*, Jiasheng Shi , Xiaoyu Xu , Xinmin Zhan, Bo Fu, Yifei Li.                                             ▼全文下载

School  of   Environmental  and   Civil  Engineering,  Jiangnan  University,  214122  Wuxi,  China  Jiangsu  Key  Laboratory of Anaerobic Biotechnology,  214122  Wuxi,  China  School  of  Pharmaceutical Sciences,  Jiangnan  University,  214122 Wuxi,  China Civil Engineering, College of  Engineering and Informatics, National University of  Ireland, Galway, Ireland

ABSTRACT: This  study was conducted  to explore  the mechanism of dewaterability improvement of waste activated sludge by  the filamentous fungus Talaromyces flavus S1.When the fungal spores were inoculated to the sterilized sludge,  the sludge dewaterability was  significantly  improved  by  48.1% and the reasons can be attributed to sludge  pellet formation and degradation of extracellular polymeric  substances,  in particular  the  slime-EPS and  loosely-bound  EPS (LB-EPS). With  the  addition of  fungal mycelium into the either sterilized sludge or non-sterilized sludge, the values of CST decreased by 74.0% and 43.7%, respectively, suggesting the fungal mycelium can improve the sludge dewaterability. After conditioned by the mycelium, the sludge  cake  by the  diaphragm filter  press  was  thicker  and  showed  less water content than the control sludge. The results in this  study demonstrated  that the Talaromyces flavus S1 can  serve  as  an  environmentally  friendly biological dewatering agent and has a promising application potential in the future.

KEYWORDS: Waste activated sludge; Dewatering; Fungal spore; Fungal mycelium; EPS;

GRAPHIC ALABSTRACT：

JOURNAL: Bioresource Technology

SOURCE: Elsevierjournal

YEAR: 2017