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Effluent composition prediction of a two-stage anaerobic digestion process: machine learning and stoichiometry techniques

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A Correction to this article was published on 07 January 2019

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Abstract

Computational self-adapting methods (Support Vector Machines, SVM) are compared with an analytical method in effluent composition prediction of a two-stage anaerobic digestion (AD) process. Experimental data for the AD of poultry manure were used. The analytical method considers the protein as the only source of ammonia production in AD after degradation. Total ammonia nitrogen (TAN), total solids (TS), chemical oxygen demand (COD), and total volatile solids (TVS) were measured in the influent and effluent of the process. The TAN concentration in the effluent was predicted, this being the most inhibiting and polluting compound in AD. Despite the limited data available, the SVM-based model outperformed the analytical method for the TAN prediction, achieving a relative average error of 15.2% against 43% for the analytical method. Moreover, SVM showed higher prediction accuracy in comparison with Artificial Neural Networks. This result reveals the future promise of SVM for prediction in non-linear and dynamic AD processes.

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Change history

  • 07 January 2019

    The original publication of this paper contains a mistake. Unfortunately, an author was inadvertently missed out, Constanza Arriagada had participated in the operation of the anaerobic digesters cited in the work and now as a PhD student, she is involved in the production of other publication

  • 07 January 2019

    The original publication of this paper contains a mistake. Unfortunately, an author was inadvertently missed out, Constanza Arriagada had participated in the operation of the anaerobic digesters cited in the work and now as a PhD student, she is involved in the production of other publication

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Acknowledgments

This research was conducted with the FONDECYT (Chile) No. 1140491, INNOVA (Chile) No. 12IDL2-13605, CONICYT-PCHA/Doctorado Nacional2016/21160226 and INNOVA (Chile) No 15VEIID-45613 grants.

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Correspondence to Marlene Roeckel.

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Responsible editor: Bingcai Pan

Appendix

Appendix

Table 3 Stoichiometric coefficients of amino acid fermentation determination of stoichiometric coefficients for protein degradation
Table 4 Experimental composition for a two-stage AD process influent and effluent. *Missing values correspond to the gray-hatched cells
Table 5 Variation of the organic loading rate (OLR), hydraulic retention time (HRT) throughout all the phases of operation in this study

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Alejo, L., Atkinson, J., Guzmán-Fierro, V. et al. Effluent composition prediction of a two-stage anaerobic digestion process: machine learning and stoichiometry techniques. Environ Sci Pollut Res 25, 21149–21163 (2018). https://doi.org/10.1007/s11356-018-2224-7

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  • DOI: https://doi.org/10.1007/s11356-018-2224-7

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