Resumo

ROMERO-YAM, Lourdes Alejandra et al. Microbial dynamics during composting of filter cake reactivated with chicken manure. Rev. Chapingo Ser.Hortic [online]. 2015, vol.21, n.1, pp.21-31. ISSN 2007-4034.  https://doi.org/10.5154/r.rchsh.2013.09.032.

Microbial dynamics, mineral and total nitrogen content were studied during the composting process of filter cake reactivated with chicken manure. Four substrates with different proportions of filter cake:chicken manure (10:0, 9:1, 7:3 and 5:5 v/v) were tested using 68 liters containers for 87 days. Temperature, total populations of bacteria, fungi, ligninolytic microorganisms, CO₂ evolution, total nitrogen, ammonium and nitrate content were the evaluated variables. The addition of chicken manure to stored filter cake increased the populations of bacteria, fungi and ligninolytic microorganisms, showing microbial populations of 9.9, 5.5 and 6.4 log units (ULog), respectively. Substrate 5:5 v/v showed a decrease in NH⁺₄-N (from 947 to 268 mg∙kg^-1) and an increase in NO^-₃-N (from 2.7 to 483 mg-∙kg¹) and in total nitrogen (3.4 to 4.7 %). This proportion of chicken manure and filter cake was better because it was biologically stable (compost) and had the highest content of total nitrogen.

Palavras-chave : Microbial ecology; lignocellulose; biotransformation of filter cake; compost.

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