Composting of fish waste and its phytotoxicity effects

This work aimed to evaluate the composting of the mixture of residues from fish filleting, using sawdust as a structuring material as an alternative for stabilization, through physical-chemical analysis and phytotoxicity. The experiment was carried out in a composter 1.10 m long, 1.50 m wide, and 1....

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Bibliographic Details
Published in:Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering Toxic/hazardous substances & environmental engineering, 2021, Vol.56 (10), p.1051-1057
Main Authors: Valente, Beatriz Simões, Otto, Iliane Müller, Demarco, Carolina Faccio, Bunde, Dienifer Aline Braun, Ávila, Fernanda Dias, Guidoni, Lucas Lourenço Gastiglioni, Pieniz, Simone, Correa, Érico Kunde, Andreazza, Robson
Format: Article
Language:English
Subjects:
Carbon/nitrogen ratio
Chemical analysis
Compost
Composting
Composts
Decomposition
environmental contamination
Filleting
Fish
germination index
Microorganisms
Organic fertilizers
Phytotoxicity
Residues
Sawdust
Stirring
sustainability
Thermophilic microorganisms
toxicity
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Summary:This work aimed to evaluate the composting of the mixture of residues from fish filleting, using sawdust as a structuring material as an alternative for stabilization, through physical-chemical analysis and phytotoxicity. The experiment was carried out in a composter 1.10 m long, 1.50 m wide, and 1.20 m high and presenting 2.50 m in total height, which received the mixture of fish filleting wastes and sawdust in a5:3 ratio, respectively. The results demonstrated that composting in cells is an efficient alternative for the decomposition of the mixture of fish filleting and sawdust residues. The rapid decomposition of fish waste and the low C/N ratio harms the development of thermophilic microorganisms during the composting of the mixture of fish filleting and sawdust residues. The compaction of the sawdust layers and the absence of stirring in the composting method in cells collaborate for the compost to need a time greater than 60 days to be recommended as simple organic fertilizer. The biomass stirring is necessary so that sawdust can be considered a good structuring agent. The phytotoxicity test should be taken into account by the Normative Instruction n° 25/2009 as an indicator of compost maturity.
ISSN:1093-4529
1532-4117
DOI:10.1080/10934529.2021.1961541