Abstract
Anaerobic digestion of organic matter with high moisture content has proven to be a suitable method for disposal of wet organic residuals with several advantages compared to other treatment technologies. This paper aimed at evaluating the theoretical and experimental biomethane potential of food processing residuals that are responsible for negative environmental impact, with exemplification for the potato processing waste. The biomethane potential is a useful parameter to assess the economic efficiency of anaerobic digestion processes as it can considerably influence the efficiency and the economic feasibility of the energy recovery technologies. Both experimental and theoretical biomethane potentials of potato waste in mesophilic anaerobic digestion as well as biodegradability of the substrate were estimated. Moreover, effects of microalgal extract addition on the digestion of potato waste were examined in an attempt to stimulate the anaerobic digestion. Cone model and a modified Gompertz model were used to predict the dynamics of biomethane production.
Highlights
Anaerobic digestion of organic matter with high moisture content has proven to be a suitable method for disposal of wet organic residuals with several advantages compared to other treatment technologies
Physicochemical analysis results of potato waste are summarized in table 1, where TS represents total solids, MC moisture content, and VS volatile solids
TBMP is an important parameter for providing essential information before developing biogas projects at industrial scale, allowing comparison between different feedstocks [22]
Summary
Anaerobic digestion of organic matter with high moisture content has proven to be a suitable method for disposal of wet organic residuals with several advantages compared to other treatment technologies. The biomethane potential is a useful parameter to assess the economic efficiency of anaerobic digestion processes as it can considerably influence the efficiency and the economic feasibility of the energy recovery technologies. Both experimental and theoretical biomethane potentials of potato waste in mesophilic anaerobic digestion as well as biodegradability of the substrate were estimated. Residual materials frequently have no utility and must be disposed of in such a manner that does not induce environmental pollution and public health concerns [2] Such residuals are rich in organic matter and have a high moisture content, that make them have a high perishability; their quick removal is mandatory [3]. Valorisation of food processing residuals for biogas production would be a proper option in reducing the amount of waste that needs to be collected and disposed of as well as in protecting ecosystem diversity and forest resource from degradation [12, 13]
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