Crude glycerin in co-composting with laying hen manure reduces N losses
Orrico Junior, Marco Antonio Previdelli; Orrico, Ana Carolina Amorim; Fava, Aldo Felipe; Sunada, Natália da Silva; Schwingel, Alice Watte; Garcia, Rodrigo Garófallo; Borquis, Rusbel Raul Aspilcueta.
Sci. agric.;
75(5): 361-367, Sept.-Oct.2018. tab, graf
Artigo
em Inglês
| VETINDEX
| ID: vti-731199
Resumo
The composting of laying hen manure is an efficient way of treating waste and producing an organic fertilizer with excellent characteristics; however, the high N losses reduce its concentration in the resulting fertilizer. Associating this residue with crude glycerin (CG) promotes a better C:N ratio and contributes to higher N retention during composting, with improvements in solids reduction and production of organic fertilizer with higher concentration of this nutrient. We carried out this research considering the hypothesis that adding CG a byproduct of biodiesel production to laying hen waste composting provides better N retention in the fertilizer generated. Increasing CG doses (0, 3, 6, 9, and 12 % in relation to the fresh mass in the windrows) were added to the laying hen manure with windrows composted for 70 days. A reduction by 100 % in total and thermotolerant coliforms occurred at all levels of CG addition. The maximum reductions in total (TS) and volatile (VS) solids were 64 and 76 %, respectively, and occurred with the addition of 6 % CG. The windrows that did not receive CG had higher N losses during the process (32 %) while the highest N concentration in the compost was 5 % at 6 % CG. We identified that adding 6 % CG to the laying hen manure in co-composting increases the reductions in TS and VS and provides higher N retention, which improves the quality of the organic fertilizer.(AU)
Biblioteca responsável:
BR68.1
Localização: BR68.1
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