Please use this identifier to cite or link to this item: http://hdl.handle.net/10316/80334
Title: Co-composting of eggshell waste in self-heating reactors: monitoring and end product quality
Authors: Soares, Micaela A R 
Quina, Margarida M J 
Quinta-Ferreira, Rosa M 
Issue Date: Nov-2013
Volume: 148
Abstract: Industrial eggshell waste (ES) is classified as an animal by-product not intended to human consumption. For reducing pathogen spreading risk due to soil incorporation of ES, sanitation by composting is a pre-treatment option. This work aims to evaluate eggshell waste recycling in self-heating composting reactors and investigate ES effect on process evolution and end product quality. Potato peel, grass clippings and rice husks were the starting organic materials considered. The incorporation of 30% (w/w) ES in a composting mixture did not affect mixture biodegradability, nor its capacity to reach sanitizing temperatures. After 25 days of composting, ES addition caused a nitrogen loss of about 10 g N kg(-1) of initial volatile solids, thus reducing nitrogen nutritional potential of the finished compost. This study showed that a composting mixture with a significant proportion of ES (30% w/w) may be converted into calcium-rich marketable compost to neutralize soil acidity and/or calcium deficiencies.
URI: http://hdl.handle.net/10316/80334
ISSN: 1873-2976
DOI: 10.1016/j.biortech.2013.08.151
Rights: openAccess
Appears in Collections:I&D CIEPQPF - Artigos em Revistas Internacionais

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