Home composting using different ratios of bulking agent to food waste.

Autor: Guidoni LLC; NEPERS, Centro de Engenharias, Universidade Federal de Pelotas, Pelotas, RS, Brazil; PPGCAmb, Centro de Engenharias, Universidade Federal de Pelotas, Pelotas, RS, Brazil. Electronic address: lucaslcg@gmail.com., Marques RV; NEPERS, Centro de Engenharias, Universidade Federal de Pelotas, Pelotas, RS, Brazil., Moncks RB; NEPERS, Centro de Engenharias, Universidade Federal de Pelotas, Pelotas, RS, Brazil., Botelho FT; Departamento de Nutrição, Faculdade de Nutrição, Universidade Federal de Pelotas, Pelotas, RS, Brazil., da Paz MF; NEPERS, Centro de Engenharias, Universidade Federal de Pelotas, Pelotas, RS, Brazil., Corrêa LB; NEPERS, Centro de Engenharias, Universidade Federal de Pelotas, Pelotas, RS, Brazil; PPGCAmb, Centro de Engenharias, Universidade Federal de Pelotas, Pelotas, RS, Brazil., Corrêa ÉK; NEPERS, Centro de Engenharias, Universidade Federal de Pelotas, Pelotas, RS, Brazil; PPGCAmb, Centro de Engenharias, Universidade Federal de Pelotas, Pelotas, RS, Brazil.
Jazyk: angličtina
Zdroj: Journal of environmental management [J Environ Manage] 2018 Feb 01; Vol. 207, pp. 141-150. Date of Electronic Publication: 2017 Nov 20.
DOI: 10.1016/j.jenvman.2017.11.031
Abstrakt: The negative environmental impacts associated with home composting may be due to the absence of a defined operation criteria for the degradation process. In addition to the potentially low environmental impact in terms of energy and water usage, which is minimal to the manufacture of the composting unit and avoiding the processing and transportation of waste or byproduct, composting at home can also promote a reduction in the emission of unpleasant gases. The proportion of the food waste and bulking agents in the composting mixture may be decisive to fulfill good practices of waste stabilization. The aim of this study was to investigate how different ratios of bulking agent and organic household waste can affect the progress and outcome of the composting process. Three treatments, varying in the ratio of rice husk: raw fruit and vegetable leftovers (70:30, 50:50, 30:70; v:v) were used in a home composting system on a pilot scale. Results show that the proportion of starting materials used in the composting mixture influenced the degradation of organic matter, nitrogen dynamics of the process and its toxicity on germinating plants. The proportions with greater amounts of food waste had higher concentrations of mineral matter, higher peak temperature, and a better initial carbon-to-nitrogen ratio, while the proportion containing 70% of bulking agent lacked odors and leachate generation and showed a low nitrogen loss. A higher proportion of food waste presented better conditions for microbiological development and less time to obtain characteristics of matured composts. A higher proportion of bulking agents resulted in favorable conditions for household handling and less potential for environmental impacts.
(Copyright © 2017 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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