Cationic starch: Safe and economic harvesting flocculant for microalgal biomass and inhibiting E. coli growth

International Journal of Biological Macromolecules
Mehrez E El-NaggarGamila H Ali

Abstract

Cationized starch-based flocculation processes are the subject of increasing attention because of their non-toxicity, biodegradability and relatively low price synthesized. The study aimed to evaluate the flocculability of different cationic starches using different concentrations of glycidyltrimethylammonium chloride (GTAC) with different degree of substitution (DS) ranged from 0.13 to 0.57. Cationized starch were characterized using Fourier Transform Infrared (FTIR), scanning electron microscopy (SEM) and toxicity checked using experimental animal procedure. They were used in comparison with aluminum sulphate for harvesting microalgal biomass collected from high rate algal pond (HRAP) at Zenin wastewater treatment plant (WWTP), Giza, Egypt. Jar test showed that gradual increase of aluminum sulphate doses (50-400 mg/L) has reduced algal suspension consequently turbidity with accompanied pH decrease from 8.6 to 6.6. Cationic starch with low DS has shown efficiency as flocculants by reducing turbidity of algal suspension from 110 to ≈2 NTU by gradual increase from 10 to 60 mg/L without change in pH value. Fecal coliforms and E. coli were inhibited from 9.6 × 102 and 8.4 × 10 CFU/ml to non-detectable count. Cationic starch with h...Continue Reading

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Feb 24, 2016·International Journal of Biological Macromolecules·A HebeishMehrez E El-Naggar
Feb 26, 2016·International Journal of Biological Macromolecules·Yuting SuShanbai Xiong

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Citations

Dec 7, 2018·World Journal of Microbiology & Biotechnology·Yoshihiro OjimaMasahito Taya
Jun 20, 2020·International Journal of Biological Macromolecules·Supenya ChittapunKittiwut Kasemwong
Apr 4, 2021·International Journal of Biological Macromolecules·Mehrez E El-NaggarSaleh A Mohamed
Jul 16, 2021·Environmental Science and Pollution Research International·Xincheng JiangHuaili Zheng
Oct 30, 2021·Luminescence : the Journal of Biological and Chemical Luminescence·Mohamed H El-NewehyMehrez E El-Naggar
Nov 28, 2021·Luminescence : the Journal of Biological and Chemical Luminescence·Mehrez E El-NaggarS F Mansour

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