黄曲霉产生的生物絮凝剂的絮凝行为及机制
Flocculation behavior and mechanism of bioflocculant produced by Aspergillus flavus.
作者信息
Aljuboori Ahmad H Rajab, Idris Azni, Al-Joubory Hamid Hussain Rijab, Uemura Yoshimitsu, Ibn Abubakar B S U
机构信息
Centre for Biofuel and Biochemical Research (CBBR), Universiti Teknologi PETRONAS, Bandar Seri Iskandar, 31750 Tronoh, Perak, Malaysia.
Department of Chemical and Environmental Engineering, Faculty of Engineering, University Putra Malaysia, Sri Serdang 43400, Selangor, Malaysia.
出版信息
J Environ Manage. 2015 Mar 1;150:466-471. doi: 10.1016/j.jenvman.2014.12.035. Epub 2015 Jan 2.
In this study, the flocculation behavior and mechanism of a cation-independent bioflocculant IH-7 produced by Aspergillus flavus were investigated. Results showed 91.6% was the lowest flocculating rate recorded by IH-7 (0.5 mg L(-1)) at pH range 4-8. Moreover, IH-7 showed better flocculation performance than polyaluminum chloride (PAC) at a wide range of flocculant concentration (0.06-25 mg L(-1)), temperature (5-45 °C) and salinity (10-60% w/w). The current study found that cation addition did not significantly enhance the flocculating rate and IH-7 is a positively charged bioflocculant. These findings suggest that charge neutralization is the main flocculation mechanism of IH-7 bioflocculant. IH-7 was significantly used to flocculate different types of suspended solids such as activated carbons, kaolin clays, soil solids and yeast cells.
在本研究中，对黄曲霉产生的一种非阳离子型生物絮凝剂IH-7的絮凝行为和机制进行了研究。结果表明，在pH值4-8范围内，IH-7（0.5 mg L(-1)）记录的最低絮凝率为91.6%。此外，在广泛的絮凝剂浓度（0.06-25 mg L(-1)）、温度（5-45°C）和盐度（10-60% w/w）范围内，IH-7表现出比聚合氯化铝（PAC）更好的絮凝性能。当前研究发现，添加阳离子不会显著提高絮凝率，且IH-7是一种带正电荷的生物絮凝剂。这些发现表明，电荷中和是IH-7生物絮凝剂的主要絮凝机制。IH-7被显著用于絮凝不同类型的悬浮固体，如活性炭、高岭土、土壤固体和酵母细胞。
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