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Modified water treatment residual as flocculant for Microcystis aeruginosa removal and water purification

  • H.-Q. Wang
  • L.-Y. ZhangEmail author
  • X.-M. Fang
  • A.-N. Zhang
Short Communication

Abstract

Based on previous research, muriatic modification parameters (including the volume of hydrochloric acid, modification temperature and reaction time) were optimized by L9 (33) orthogonal design using the removal efficiency of unicellular M. aeruginosa as an index. The results showed that the optimized modification conditions consisted of a hydrochloric acid volume of 4 mL, a modification temperature of 200 °C and a reaction time of 3 h. Under the above conditions, the removal rate for unicellular and colonial M. aeruginosa was 89.26 and 75.53%, respectively. In addition, the flocculation process caused no cell damage, and the cells remained intact after use of the modified water treatment residuals (WTRs) flocculant. TP and TN in water were reduced by 63.37 and 19.03%, respectively. Therefore, the modified WTR flocculant was a technically viable method to remove unicellular and colonial M. aeruginosa.

Keywords

Water treatment residual Flocculant Microcystis aeruginosa removal Water purification Orthogonal design 

Notes

Acknowledgements

This work was kindly supported by the National Science-Technology Support Plan Projects of China (2012BAJ21B06), the National Natural Science Foundation of China (51108447; 51208485), the China Postdoctoral Science special Foundation (201104499), the Key Science and Technology Project of Henan Province of China (152102210296) and the Key Scientific Research Foundation of the Higher Education Institutions of Henan Province, China (16A610006).

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Copyright information

© Islamic Azad University (IAU) 2017

Authors and Affiliations

  • H.-Q. Wang
    • 1
  • L.-Y. Zhang
    • 2
    Email author
  • X.-M. Fang
    • 3
  • A.-N. Zhang
    • 3
  1. 1.School of Environmental and Safety EngineeringUniversity of South ChinaHengyangChina
  2. 2.Chinese Research Academy of Environmental SciencesBeijingChina
  3. 3.School of Municipal and Environmental EngineeringHenan University of Urban ConstructionPingdingshanChina

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