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Sustainability 2015, 7(5), 6033-6045; doi:10.3390/su7056033

Assessment of Gardening Wastes as a Co-Substrate for Diapers Degradation by the Fungus Pleurotus ostreatus

1
Departamento de Energía, Universidad Autónoma Metropolitana Unidad Azcapotzalco, Avenida San Pablo No 180, Col. Reynosa Tamaulipas, Delegación Azcapotzalco, Distrito Federal C.P. 02200, Mexico
2
Instituto de Ingeniería, Universidad Autónoma de Baja California Campus Mexicali, Calle de la normal s/n y Boulevard Benito Juárez, Col. Insurgentes Este, Mexicali, Baja California C.P. 21280, Mexico
3
Sociedad Mexicana de Ciencia y Tecnología Aplicada a Residuos Sólidos, A. C., Av. Cuauhtémoc 403, Col. Roma Norte, Delegación Cuauhtémoc, Distrito Federal C.P. 06700, Mexico
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Academic Editor: Vincenzo Torretta
Received: 18 March 2015 / Revised: 1 May 2015 / Accepted: 8 May 2015 / Published: 15 May 2015
(This article belongs to the Special Issue Sustainability of Resources)
View Full-Text   |   Download PDF [1212 KB, uploaded 15 May 2015]   |  

Abstract

Waste with high biomass content generated in cities in developing countries is sent to landfills or open dumps. This research aims to degrade biomass content in urban waste through cultivation, at pilot scale, of the edible mushroom Pleurotus ostreatus. First, the number of diapers used by one baby per week was measured with a survey in day care facilities. Then, cellulose content of diapers was assessed. Finally, cultivation of P. ostreatus was carried out using as substrate a mixture of diapers with gardening waste, a co-substrate readily available at urban settings. The factors assessed were strain of P. ostreatus (grey BPR-81, white BPR-5), conditioning of the substrate (diapers with and without plastic) and co-substrate (wheat straw, grass, and withered leaves). Results show that diapers are a valuable source of biomass, as generation of diapers with urine is 15.3 kg/child/month and they contain 50.2% by weight of cellulose. The highest reductions in dry weight and volume (>64%) of substrates was achieved with the substrate diaper without plastic and co-substrate wheat straw. Although diapers with plastic and grass and leaves showed lower degradation, they achieved efficiencies that make them suitable as a co-substrate (>40%), considering that their biomass is currently confined in landfills. View Full-Text
Keywords: biomass; biodegradation; cellulose; biological efficiency biomass; biodegradation; cellulose; biological efficiency
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Espinosa-Valdemar, R.M.; Vázquez-Morillas, A.; Ojeda-Benítez, S.; Arango-Escorcia, G.; Cabrera-Elizalde, S.; Quecholac-Piña, X.; Velasco-Pérez, M.; Sotelo-Navarro, P.X. Assessment of Gardening Wastes as a Co-Substrate for Diapers Degradation by the Fungus Pleurotus ostreatus. Sustainability 2015, 7, 6033-6045.

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