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Waste and Biomass Valorization

, Volume 10, Issue 5, pp 1177–1189 | Cite as

Parametric Optimization of Biohydrogen Production from Potato Waste and Scale-Up Study Using Immobilized Anaerobic Mixed Sludge

  • Patrick T. Sekoai
  • Augustine O. Ayeni
  • Michael O. DaramolaEmail author
Original Paper

Abstract

Response surface methodology (RSM) using the central composite design (CCD) approach was used in the parametric optimization of biohydrogen production from potato waste and the scale-up study was investigated using immobilized anaerobic mixed sludge. A two-level-four-factor (24)-CCD obtained via a statistical software (STATISTICA 8 release 7) was used to generate 26 fermentation experiments. The experimental results were used to generate a second-order polynomial regression equation relating the biohydrogen production to the parameters considered (potato waste concentration, pH, temperature, and fermentation time). The optimum conditions for biohydrogen production were 39.56 g/L, 7.86, 37.87 °C and 82.58 h for potato waste concentration, pH, temperature, and fermentation time, respectively with a corresponding biohydrogen yield of 68.54 mL H2/g total volatile solids (TVS). A coefficient of determination (R2) of 0.99 was obtained by solving the polynomial regression equation. The obtained optimized conditions were further validated experimentally resulting in biohydrogen yield of 79.43 mL H2/g TVS, indicating a 15.9% biohydrogen increase. Scale-up conducted at the validated optimized conditions with the immobilized bacteria generated 298.11 mL H2/g TVS with maximum fraction of 56.38%. Therefore, these results demonstrate the potential of up-scaling biohydrogen production using immobilized bacteria which could be instrumental towards its large-scale production.

Keywords

Dark fermentation Biohydrogen Optimization Immobilization Potato waste 

Notes

Acknowledgement

The funding was provided by National Research Foundation - South Africa (Grant No. 95061).

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Copyright information

© Springer Science+Business Media B.V., part of Springer Nature 2017

Authors and Affiliations

  1. 1.Sustainable Energy & Environment Research Unit, Faculty of Engineering and the Built Environment, School of Chemical and Metallurgical EngineeringUniversity of the WitwatersrandJohannesburgSouth Africa
  2. 2.Department of Chemical Engineering, College of EngineeringCovenant UniversityOtaNigeria

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