Enhanced Sludge Dewatering Performance by a Novel Bioflocculant Conditioning

Abstract:

The characterization and use in sludge dewatering of a novel bioflocculant M-C11 produced by Klebsiella pneumoniae was investigated. The purified M-C11 was composed of 91.20% sugar, 4.61% protein and 3.91% nucleic acids (w/w). Fourier transform infrared (FT-IR) spectroscopy of purified M-C11 confirmed the presence of carboxyl, hydroxyl, methoxyl and amino groups. The sludge resistance to filtration (SRF) decreased remarkably from 11.64×10¹² m/kg to 4.66×10¹² m/kg under the optimum conditions (pH=6, 3 mL bioflocculant and 4 mL CaCl₂ dosage), after being conditioned with bioflocculant M-C11, which was more efficient than inorganic flocculants. Results showed that M-C11 could serve as a substitute for chemical conditioners and a promising alternative to the sludge treatment industries.

• Periodical: Applied Mechanics and Materials (Volumes 448-453)
• Pages: 659-664
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.448-453.659
• Online since: October 2013
• Authors: Jie Wei Liu, Jun Wei Ma*, Yan Zhong Liu, Ya Yang
• Keywords: Bioflocculant, Dewatering Performance, Klebsiella Pneumonia, Sludge Conditioning

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