Composting of household organic waste: effect on control parameters and final compound quality

Maico Chiarelotto, Willian Chucchi Bottin, Cristian Eduardo Spicker, Savio Silva Duarte, Marilete Chiarelotto, Marlene Magnoni Bortoli

Resumo


It is estimated that 51% of Brazilian urban solid waste is composed of organic material, which
has a high recyclability potential via alternative processes. One means of optimization and recycling this
fraction would be the popularization of household composting and the dissemination of means of attaining it.
The current study objective, therefore, was to evaluate control characters of the household organic residue
composting process, test final organic compound product quality and investigate the feasibility of conducting
such processes in urban dwellings. Organic residues were collected for three days, distributed over a week,
in 20 residences of the urban area of Marmeleiro municipality, Paraná State, southern Brazil. A compost heap
was set up with an initial mass of 137.21 kg of organic material. During the degradation process, temperature,
dry mass, volume, pH, electrical conductivity, phytotoxicity, volatile solids, total organic carbon exothermic
accumulation, and loss of organic matter were measured. At the end of the process, the CTC, CTC:COT, total
nitrogen and C:N ratio were also determined. Throughout the composting process it was recorded that the
germination index went from 45.27 to 109.43, as the material changed from being dominated by phytotoxic
compounds to phytostimulants. In addition, organic compound CTC increased from 27.2 to 57.8, showing
organic material degradation occurred in only 37 days. The experimental analysis of the degradation process,
has shown that treatment of urban organic waste in compost heaps is both viable and safe under domestic
circumstances.

Palavras-chave


Degradação aeróbia. Tratamento. Resíduos sólidos urbanos.

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DOI: http://dx.doi.org/10.18227/1982-8470ragro.v12i4.5126

Direitos autorais 2018 REVISTA AGRO@MBIENTE ON-LINE

Revista Agroambiente On-line ISSN 1982-8470 (online), www.agroambiente.ufrr.br. E-mail: agroambiente@ufrr.br. Licença Creative Commons
Este obra está licenciado com uma Licença Creative Commons Atribuição-SemDerivações-SemDerivados 3.0 Brasil.