Optimization of Cobalt Nanoparticles for Biogas Enhancement from Green Algae Using Response Surface Methodology

Authors

  • Asad A. Zaidi
    Affiliation
    Department of Mechanical Engineering, Faculty of Engineering Sciences and Technology, Hamdard University, 74600 Karachi, Hakim Mohammed Said Road, Pakistan
    College of Power and Energy Engineering, Harbin Engineering University, 150001 Harbin, P.O.B. 150001, China
  • Sohaib Z. Khan
    Affiliation
    Department of Mechanical Engineering, Faculty of Engineering, Islamic University of Madinah, 41411 Madinah, P. O.B. 170, Saudi Arabia
  • Muhammad Nihal Naseer
    Affiliation
    Department of Engineering Science, PN Engineering College, National University of Sciences and Technology, 75350 Karachi, P.O.B. 75350, Pakistan
    Department of Mechanical Engineering, College of Engineering, Seoul National University, 08826 Seoul, P.O.B. 08826, Republic of Korea
  • Hamad Almohammadi
    Affiliation
    Department of Chemical Engineering, Faculty of Engineering, Islamic University of Madinah, 42351 Madinah, P.O.B. 170, Saudi Arabia
  • Muhammad Asif
    Affiliation
    Department of Engineering Science, PN Engineering College, National University of Sciences and Technology, 75350 Karachi, P.O.B. 75350, Pakistan
  • Yasmin Abdul Wahab
    Affiliation
    Nanotechnology & Catalysis Research Centre, Universiti Malaya, 50603 Kuala Lumpur, P.O.B. 50603, Malaysia
  • Mohammad Aminul Islam
    Affiliation
    Department of Electrical Engineering, Faculty of Engineering, Universiti Malaya, 50603 Kuala Lumpur, P.O.B. 50603, Malaysia
  • Mohd Rafie Johan
    Affiliation
    Nanotechnology & Catalysis Research Centre, Universiti Malaya, 50603 Kuala Lumpur, P.O.B. 50603, Malaysia
  • Hanim Hussin
    Affiliation
    School of Electrical Engineering, College of Engineering, Universiti Teknologi MARA, 40450 Shah Alam, Selangor, P.O.B. 40450, Malaysia
https://doi.org/10.3311/PPch.20375

Abstract

Organic matter may be converted to energy through various methods, but the most preferable one is the Anaerobic Digestion (AD), specifically for biogas production. In sustainable bioenergy production, it can undoubtedly be called one of the most widely used methods from the various feedstock. Over the past years, algae waste has become an increasingly acute environmental problem but luckily it can be used as feedstock to produce bioenergy. In order to improve the energy productivity of green algae, this study is focused on the introduction of cobalt (Co) nanoparticles (NPs) in the AD process. The concentration of Co NPs was optimized using response surface methodology (RSM). Mesophilic temperature range (25–45 °C), initial pH (5–9) and Co NPs dosage (0.5–2 mg/L) were selected as the independent variables for RSM. The results indicated that at optimized values (Co NPs concentration = 1 mg/L, initial pH = 7, and digestion temperature = 35 °C) produced the highest biogas yield of 298 ml. An experiment was carried out at optimized conditions to explore the effect on biogas production. The results showed that Co NPs had a positive influence on biogas yield. The low concentrations achieved higher biogas production as compared to higher ones. A maximum biogas yield of 678 mL is achieved by Co NPs (1 mg/L). AD performance was further evaluated by the modified Gompertz model. Different kinetic parameters were calculated. The values of the performance indicators confirmed that the mathematical model fitted well with experimental data.

Keywords:

Anaerobic Digestion, biogas, cobalt nanoparticles, mathematical kinetic models

Citation data from Crossref and Scopus

Published Online

2023-02-01

How to Cite

Zaidi, A. A., Khan, S. Z., Naseer, M. N., Almohammadi , H., Asif, M., Abdul Wahab, Y. “Optimization of Cobalt Nanoparticles for Biogas Enhancement from Green Algae Using Response Surface Methodology”, Periodica Polytechnica Chemical Engineering, 67(1), pp. 116–126, 2023. https://doi.org/10.3311/PPch.20375

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