Data/hora: 05/06/2024 11:02:59

Biblioteca(s): | Embrapa Clima Temperado; Embrapa Suínos e Aves.
Data corrente: | 10/11/2020
Data da última atualização: | 10/11/2020
Autoria: | SARDÁ, L. G.; HIGARASHI, M. M.; NICOLOSO, R. da S.; FALKOSKI, C.; RIBEIRO, S. M. S.; SILVEIRA, C. A. P.; SOARES, H. M.
Afiliação: | LUANA GOULART SARDÁ, UFSC; MARTHA MAYUMI HIGARASHI, CNPSA; RODRIGO DA SILVEIRA NICOLOSO, CNPSA; CAMILA FALKOSKI, UNC/Concórdia; STEPHANIE M. S. RIBEIRO, UNC/Concórdia; CARLOS AUGUSTO POSSER SILVEIRA, CPACT; HUGO MOREIRA SOARES, UFSC.
Título: | Effects of dicyandiamide and Mg/P on the global warming potential of swine slurry and sawdust cocomposting.
Ano de publicação: | 2020
Fonte/Imprenta: | Environmental Science and Pollution Research, v. 27, n. 24, p. 30405-30418, 2020.
DOI: | https://doi.org/10.1007/s11356-020-09244-8
Idioma: | Inglês
Conteúdo: | Abstract: Composting is an emerging strategy for swine slurry treatment; nonetheless, significant greenhouse gases (GHG) emissions may occur during this process.We carried out two separate assays with increasing doses of dicyandiamide (DCD; up to 1.1%w/w) as a nitrification inhibitor and solutions ofMgCl2 and H3PO4 (Mg/P; up to 0.09/0.06 mol kg&#8722;1) to promote struvite crystallization in order to assess their efficiencies as additives to decrease GHG emission during swine slurry cocomposting with sawdust (1:1v/v). We monitored the nitrous oxide (N2O-N), methane (CH4-C), and carbon dioxide (CO2-C) emissions and the ammonia (NH4 +-N) and nitrate/nitrite (NOx-N) concentrations in compost reactors (35 L) during the first 4?5 weeks of composting. DCD had no effect on CH4-C and CO2-C emissions but decreased N2O-N losses by up to 56% compared with control. However, DCD inactivation was favored by thermophilic conditions and N2O-N emissions increased to same levels of control after 13 days. Mg/P was effective to decrease N2O-N losses only at the highest dose, which also sustained higher [NH4 +-N] in the compost by the end of the assessment. Nonetheless, the use of 0.09/0.06 mol kg&#8722;1 of Mg/P also decreased CH4-C and CO2-C emissions compared with lower doses of Mg/P and unamended treatments. Overall, DCD and Mg/P amendments decreased the global warming potential (GWP) of swine slurry composting by up to 46 and 28%, respectively. The Mg/P application may be also interesting to increase the compost quality by increasing its NH4 +-N availability.
Palavras-Chave: | Cocompostagem; Cocomposting; Dicianodiamida; Gás de efeito estufa; Precipitação de estruvita; Struvite precipitation; Swine slurry; Swine waste.
Thesagro: | Aditivo; Dejeto; Suíno.
Thesaurus Nal: | Additives; Dicyandiamide; Greenhouse gas emissions; Greenhouse gases; Wastewater treatment.
Categoria do assunto: | --
Registro original: | Embrapa Suínos e Aves (CNPSA)

Exemplares:

CNPSA - (21970-1) - UPC - AP - DD -  -  -  - DIS
CPACT - (21665-1) - UPC - AP - DD -  -  -  - DIS