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

Abstract

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.

Karakteristik dan Potensi Enzimatis Bakteri Asal Tanah Sampah Dapur dan Kotoran Ternak sebagai Kandidat Agen Biodegradasi Sampah Organik

“…Pertambahan populasi penduduk menyebabkan produksi sampah organik terus meningkat dan mengakibatkan penumpukkan. Namun, sampah organik umumnya dikumpulkan di tempat pembuangan akhir dan dibiarkan terdekomposisi secara alami sehingga kehilangan potensi untuk didaur ulang (Chiarelotto et al, 2018). Pengomposan berpotensi sebagai alternatif yang dapat dilakukkan untuk mendaur ulang sampah organik.…”

<i>In situ</i> analysis of a composting plant located in São Paulo city: fungal ecology in different composting phases

“…Composting or bio-stabilization is a controlled aerobic biological process that leads to the production of the compound which results from the decomposition and humification of a mixture of organic materials waste under conditions as presence of oxygen and balance between the chemical elements of matter, by the action of microorganisms and the biodegradable waste materials are aerobically digested at a stabilized organic fraction that can be recycled for agricultural uses. It is estimated that the total process can take from 90 to 120 days (Ankidawa & Nwodo, 2012;Chiarelotto, Bottin, Spicker, Chiarelotto, & Bortoli, 2018).…”