Waste degradation and gas production with enzymatic enhancement in anaerobic and aerobic landfill bioreactors

Enhanced performance of the aerobic landfill reactor by augmentation of manganese peroxidase

“…It can be concluded that the enzyme dose significantly increases the CO 2 production and the C + H/L ratio in partially stabilized waste. Similar CO 2 production co-relationships were observed by Hettiaratchi et al (2014).…”

“…Unlike in anaerobic conditions, it is not necessary to activate peroxidase enzymes using an oxidising agent under aerobic conditions as explained by Hettiaratchi et al (2014). MnP from Nematoloma frowardii purchased from Sigma-Aldrich Co. (Product #: 41563) was used for the experiments.…”

“…Of these peroxidases, LiP and MnP are described as true lignin degraders due to the high potential redox value (Jayasinghe et al, 2011). Also, Hettiaratchi et al (2014) demonstrated that MnP is a better enhancement agent than LiP. Although LiP is a true lignin degrader, it does not hydrolyse phenolic compounds, hence it has a lower potential to degrade lignin than MnP.…”

“…Other lignin degrading methods, such as photochemical strategies also has been studied recently (Nguyen et al, 2014), however, this paper only focuses on waste lignin degradation using fungi. Hettiaratchi et al (2014) have demonstrated that enzyme addition can increase the lignin degradation of landfilled waste under both anaerobic and aerobic conditions. The lignin degrading enzymes in general include an array of oxidases and peroxidases.…”

Minería de rellenos sanitarios como alternativa de gestión para residuos sólidos

“…Si se hace una explotación minera de los rellenos se evitarían todos estos costos (Calvallucci, 2009). Así, se evita la construcción de nuevos rellenos y el empleo de terrenos que podrían ser útiles para la agricultura o la ganadería; de allí la importancia de la minería en los rellenos sanitarios (Lopez et al, 2005;Hettiaratchi et al, 2014). De otra parte, una oportunidad de la utilización de la basura para generar energía es la comercialización de los bonos de carbono que se otorgan por la reducción de las emisiones de gases de efecto invernadero (bióxido de carbono, metano, óxido nitroso, entre otros).…”