Resumo

CARRILLO-SANCEN, Gabriela et al. The aeration rate in the aerobic degradation of the organic fraction of municipal solid waste. Rev. Mex. Cienc. Agríc [online]. 2021, vol.12, n.7, pp.1149-1159.  Epub 22-Mar-2022. ISSN 2007-0934.  https://doi.org/10.29312/remexca.v12i7.2760.

Microbial and enzymatic kinetics are important factors during the aerobic degradation of the organic fraction of municipal solid waste, these depend mainly on the incubation temperature and aeration rates. The objective of this research was to evaluate the process of aerobic degradation, by multiple variables and their combination to understand the interactions between aeration rates in aerobic degradation and their responses. Aeration rates were set at 0.032, 0.064, 0.125, 0.251 and 0.392 L of moist air kg-1 min-1 at 35 °C with inoculum. Microbial activity was evaluated indirectly by means of respirometry, that is, CO2 production and O2 consumption. Extracellular enzymatic activities (ie., pectinases, cellulases, xylanases and proteases) were quantified by releasing the reducing sugars. The different tests were carried out at the Metropolitan Autonomous University, Iztapalapa Unit in September 2019. Finding a strong positive relationship between xylanase and pectinase enzymatic activity and dry weight loss, along with increased cellulase and xylanase activities at higher aeration rates.

Palavras-chave : enzymatic activities; respirometry; aeration rate.

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