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Frontiers of Chemical Science and Engineering

, Volume 10, Issue 4, pp 499–508 | Cite as

Microalgal bioremediation of food-processing industrial wastewater under mixotrophic conditions: Kinetics and scale-up approach

  • Suvidha Gupta
  • R. A. Pandey
  • Sanjay B. Pawar
Research Article

Abstract

The Chlorella microalgae were mixotrophically cultivated in an unsterilized and unfiltered raw food-processing industrial wastewater. Both inorganic carbon (CO2-air) and organic carbon (wastewater) were provided simultaneously for microalgae growth. The aim of the study is to find out the utilization rates of total organic carbon (TOC) and chemical oxygen demand (COD) under mixotrophic conditions for a given waste water. About 90% reduction in TOC and COD were obtained for all dilutions of wastewater. Over 60% of nitrate and 40% of phosphate were consumed by microalgae from concentrated raw wastewater. This study shows that microalgae can use both organic and inorganic sources of carbon in more or less quantity under mixotrophic conditions. The growth of microalgae in food-processing industrial wastewater with all studied dilution factors, viz. zero (raw), 1.6 (dilution A), and 5 (dilution B) suggests that the freshwater requirement could be reduced substantially (20%–60%). The degradation kinetics also suggests that the microalgae cultivation on a high COD wastewater is feasible and scalable.

Keywords

total organic carbon wastewater bioremediation kinetics mixotrophic cultivation 

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Copyright information

© Higher Education Press and Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  • Suvidha Gupta
    • 1
  • R. A. Pandey
    • 1
  • Sanjay B. Pawar
    • 1
  1. 1.Environmental Biotechnology DivisionCSIR–National Environmental Engineering Research Institute (NEERI)NagpurIndia

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