Removal of dyes from wastewater by growing fungal pellets in a semi-continuous mode

Tao Lu, Qilei Zhang, Shanjing Yao

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PDF(350 KB)
Front. Chem. Sci. Eng. ›› 2017, Vol. 11 ›› Issue (3) : 338-345. DOI: 10.1007/s11705-017-1644-0
RESEARCH ARTICLE

Removal of dyes from wastewater by growing fungal pellets in a semi-continuous mode

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Abstract

To increase the efficiency of dye removal from wastewater using mycelial pellets, a bubble column reactor with a simple structure was designed and efficiently used to remove dyes from solution containing dyes. The mycelial pellets were prepared by marine fungus Aspergillus niger ZJUBE-1. Eight dyes were tested as dye targets for the adsorption capacity of mycelial pellets and good removal results were obtained. Eriochrome black T was selected as a model dye for characterizing the adsorption processes in detail. The measurement results of Zeta potential and FT-IR analysis indicate that the electrostatic attraction may play a key role in the biosorption process. The bubble column reactor was utilized to study the batch dye-removal efficiency of mycelial pellets. A re-culture process between every two batches, which was under non-sterile condition, successfully enhanced the utilization of mycelium biomass. The dye removal rate is 96.4% after 12 h in the first batch and then decreases slowly in the following batches. This semi-continuous mode, which consists of commutative processes of dye-removal and re-culture, has some outstanding advantages, such as low power consumption, easy operation, high dye removal rate, and efficient biomass utilization.

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Keywords

dye / mycelial pellets / marine fungus / bubble column reactor / semi-continuous biosorption

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Tao Lu, Qilei Zhang, Shanjing Yao. Removal of dyes from wastewater by growing fungal pellets in a semi-continuous mode. Front. Chem. Sci. Eng., 2017, 11(3): 338‒345 https://doi.org/10.1007/s11705-017-1644-0

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Acknowledgements

The authors would like to thank the National Natural Science Foundation of China for the financial support (Grant No. 21376214).

RIGHTS & PERMISSIONS

2017 Higher Education Press and Springer-Verlag Berlin Heidelberg
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