Optimization of Methane Production from Macroalgae Feedstock using Multivariate Technique under Mesophilic and Thermophilic Conditions
Keywords:
Biomethane, macroalgae, regression, optimization, quadraticAbstract
A multivariate technique was used to optimize methane production from anaerobic digestion of macroalgae under mesophilic and thermophilic conditions. To evaluate the effects and interaction of three reaction variables: COD, VFA, and ammonia on methane production, their data recorded in a time order were subjected to fit and multiple regression analysis, which generated a second order quadratic polynomial equation used to predict the optimized methane production. The ANOVA results showed the developed model for the mesophilic (p< 0.003) and thermophilic (p< 0.000) reactors are significant. Their R2 values of 0.97 and 0.99 suggest it was suitable for interpreting the experimental data set and adjusted R2 of (0.91 and 0.97) indicates good regression models. The interaction terms for mesophilic and thermophilic reactors, has a positive influence on methane production compared to other terms. The model predicted the optimal reactors conditions, derived as X1: COD = 6.6 g L-1, X2: VFAs = 2.8 g L-1, X3: Ammonia = 1.3 g L-1 for the mesophilic reactor, and X1: COD = 6.7 g L-1, X2: VFAs = 2.5 g L-1, X3: Ammonia = 1.1 g L-1 for the thermophilic reactor.
References
. A.-A. Issah, T. Kabera, and F. Kemausuor, “Biogas optimisation processes and effluent quality: A review,” Biomass and Bioenergy, vol. 133, p. 105449, 2020.
. N. Yan, B. Ren, B. Wu, D. Bao, X. Zhang, and J. Wang, “Multi-objective optimization of biomass to biomethane system,” Green Energy Environ., vol. 1, no. 2, pp. 156–165, 2016.
. Y. Jiang, C. Banks, Y. Zhang, S. Heaven, and P. Longhurst, “Quantifying the percentage of methane formation via acetoclastic and syntrophic acetate oxidation pathways in anaerobic digesters,” Waste Manag., vol. 71, pp. 749–756, 2018.
. C. Abendroth et al., “Shedding light on biogas: Phototrophic biofilms in anaerobic digesters hold potential for improved biogas production,” Syst. Appl. Microbiol., vol. 43, no. 1, p. 126024, 2020.
. R. Rajkumar, Z. Yaakob, and M. S. Takriff, “Potential of micro and macro algae for biofuel production: a brief review,” Bioresources, vol. 9, no. 1, pp. 1606–1633, 2014.
. S.-K. Kim and K. Chojnacka, Marine algae extracts: processes, products, and applications. John Wiley & Sons, 2015.
. C. S. Jones and S. P. Mayfield, “Algae biofuels: versatility for the future of bioenergy,” Curr. Opin. Biotechnol., vol. 23, no. 3, pp. 346–351, 2012.
. E. B. G. Kana, J. K. Oloke, A. Lateef, and M. O. Adesiyan, “Modeling and optimization of biogas production on saw dust and other co-substrates using artificial neural network and genetic algorithm,” Renew. energy, vol. 46, pp. 276–281, 2012.
. M. E. Montingelli, K. Y. Benyounis, B. Quilty, J. Stokes, and A. G. Olabi, “Optimisation of biogas production from the macroalgae Laminaria sp. at different periods of harvesting in Ireland,” Appl. Energy, vol. 177, pp. 671–682, 2016.
. Edward Membere, “The feasibility of using brown seaweed, Laminaria digitata as feedstock for generating bioenergy and biomaterials,” Newcastle University Unpon Tyne, United Kingdoom, 2018.
. W. E. Federation and A. P. H. Association, “Standard methods for the examination of water and wastewater,” Am. Public Heal. Assoc. Washington, DC, USA, 2005.
. M. Edward, S. Edwards, U. Egwu, and P. Sallis, “Bio-methane potential test (BMP) using inert gas sampling bags with macroalgae feedstock,” Biomass and Bioenergy, 2015.
. D. McGeeney, “Pratical Statistics workshop III.,” 2015.
. M. E. Montingelli, K. Y. Benyounis, B. Quilty, J. Stokes, and A. G. Olabi, “Influence of mechanical pretreatment and organic concentration of Irish brown seaweed for methane production,” Energy, vol. 118, pp. 1079–1089, 2017.
. G. K. Kafle and L. Chen, “Comparison on batch anaerobic digestion of five different livestock manures and prediction of biochemical methane potential (BMP) using different statistical models,” Waste Manag., vol. 48, pp. 492–502, 2016.
. Y. Mu, H.-Q. Yu, and G. Wang, “A kinetic approach to anaerobic hydrogen-producing process,” Water Res., vol. 41, no. 5, pp. 1152–1160, 2007.
. M. E. Montingelli, S. Tedesco, and A. G. Olabi, “Biogas production from algal biomass: A review,” Renew. Sustain. Energy Rev., vol. 43, pp. 961–972, 2015.
. B. Trisakti, M. Irvan, and M. Turmuzi, “Effect of temperature on methanogenesis stage of two-stage anaerobic digestion of palm oil mill effluent (POME) into biogas,” in IOP Conference Series: Materials Science and Engineering, 2017, vol. 206, no. 1, p. 12027.
. K. Paritosh, S. K. Kushwaha, M. Yadav, N. Pareek, A. Chawade, and V. Vivekanand, “Food waste to energy: an overview of sustainable approaches for food waste management and nutrient recycling,” Biomed Res. Int., vol. 2017, 2017.
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