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Registro Completo |
Biblioteca(s): |
Embrapa Amazônia Oriental. |
Data corrente: |
26/03/2012 |
Data da última atualização: |
25/05/2017 |
Autoria: |
VASCONCELOS, S. S. |
Afiliação: |
STEEL SILVA VASCONCELOS, CPATU. |
Título: |
Moisture and nutrient constraints to ecosystem processes in a forest regrowth stand in Eastern Amazonia, Brazil. |
Ano de publicação: |
2006 |
Fonte/Imprenta: |
2006. |
Páginas: |
128 f. |
Idioma: |
Inglês |
Notas: |
Dissertation (Doctor of Philosophy) - University of Florida, Gainesville. |
Conteúdo: |
Changes in land-use and climate are likely to alter resource (e.g., moisture and nutrient) availability in tropical forest soils, but quantitative assessment of the role of resource constraints as regulators of ecosystem processes is rather limited. In this dissertation, moisture and nutrient availability were altered through dry-season irrigation and bi-weekly aboveground litter removal, respectively, to study how these resources control aboveground and belowground ecosystem processes in a forest regrowth stand in the Brazilian Amazon. Moisture availability strongly constrains soil respiration as indicated by the responses of soil carbon dioxide emissions to soil wet-up events and dry-season irrigation. Higher moisture availability in irrigated plots also increased leaf litter decomposition and slightly increased soil nitrous oxide and methane emissions, but did not alter monthly litterfall quantity and quality, and soil nitric oxide emission. Litter removal decreased carbon dioxide emissions and litterfall nitrogen concentration, but had no effects on litterfall quantity, and soil nitrogen oxides and methane emissions. Aboveground net primary productivity was constrained by moisture availability as indicated by the response of wood increment to interannual variation in dry season rainfall and to irrigation, suggesting decreased potential of carbon sequestration from forest regrowth under anticipated scenarios of reduced rainfall in Amazonia. |
Thesagro: |
Ecossistema; Floresta; Umidade. |
Thesaurus Nal: |
Amazonia. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/56447/1/vasconcelos-s.pdf
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Marc: |
LEADER 02013nam a2200181 a 4500 001 1920382 005 2017-05-25 008 2006 bl uuuu m 00u1 u #d 100 1 $aVASCONCELOS, S. S. 245 $aMoisture and nutrient constraints to ecosystem processes in a forest regrowth stand in Eastern Amazonia, Brazil. 260 $a2006.$c2006 300 $a128 f. 500 $aDissertation (Doctor of Philosophy) - University of Florida, Gainesville. 520 $aChanges in land-use and climate are likely to alter resource (e.g., moisture and nutrient) availability in tropical forest soils, but quantitative assessment of the role of resource constraints as regulators of ecosystem processes is rather limited. In this dissertation, moisture and nutrient availability were altered through dry-season irrigation and bi-weekly aboveground litter removal, respectively, to study how these resources control aboveground and belowground ecosystem processes in a forest regrowth stand in the Brazilian Amazon. Moisture availability strongly constrains soil respiration as indicated by the responses of soil carbon dioxide emissions to soil wet-up events and dry-season irrigation. Higher moisture availability in irrigated plots also increased leaf litter decomposition and slightly increased soil nitrous oxide and methane emissions, but did not alter monthly litterfall quantity and quality, and soil nitric oxide emission. Litter removal decreased carbon dioxide emissions and litterfall nitrogen concentration, but had no effects on litterfall quantity, and soil nitrogen oxides and methane emissions. Aboveground net primary productivity was constrained by moisture availability as indicated by the response of wood increment to interannual variation in dry season rainfall and to irrigation, suggesting decreased potential of carbon sequestration from forest regrowth under anticipated scenarios of reduced rainfall in Amazonia. 650 $aAmazonia 650 $aEcossistema 650 $aFloresta 650 $aUmidade
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Embrapa Amazônia Oriental (CPATU) |
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Registro Completo
Biblioteca(s): |
Embrapa Semiárido. |
Data corrente: |
29/05/2019 |
Data da última atualização: |
02/12/2019 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
B - 1 |
Autoria: |
AMORIM, M. C. C. de; SILVA, P. T. de S. e; BARBOSA, P. S.; MONTEFUSCO, N. E. |
Afiliação: |
Miriam Cleide Cavalcante de Amorim; PAULA TEREZA DE SOUZA E SILVA, CPATSA; Patricia Silva Barbosa; Nayara Evelyn Montefusco. |
Título: |
Anaerobic biodegradation of cassava wastewater under different temperatures and inoculums. |
Ano de publicação: |
2019 |
Fonte/Imprenta: |
Comunicata Scientiae, v. 10, n. 1, p. 65-76, 2019. |
DOI: |
10.14295/CS.v10i1.3009 |
Idioma: |
Inglês |
Conteúdo: |
The production of starch generates, as a by-product, the cassava wastewater (manipueira), which can be treated by anaerobic digestion to provide biogas and minimize its polluting potential. The most commonly utilized biomass in the anaerobic digestion is the anaerobic sludge. The literature presents, as an alternative to sludge, bovine manure and ruminal fluids, being scarce the studies with the cassava wastewater. This research evaluated the influence of temperature on the microbial ability of cattle and goat rumen in anaerobically biodegrading the manipueira in substitution to the anaerobic sludge. The cattle and goat rumen specific methanogenic activities (SMA) were compared with that of the anaerobic sludge. Subsequently, by using the inoculum which had the best SMA results, cassava wastewater biodegradability tests were performed, investigating the kinetics of the organic matter removal and methane production at 32 ° C and 39 ° C. The bovine rumen presented better results in the SMA (0,315 g COD-CH4 g VSS.d-1) and methane production (1,026 mL). The temperature of 32 °C did not influence the activity of bovine ruminal inoculum as the kinetics of the biodegradation of the manipueira did not differ for the evaluated temperatures (0.1799 d-1 at 32°C and 0.1781 d-1 at 39°C). Bovine rumen achieved glucose reduction of 76% and 80% and methane yield of 77% and 79% for the tests at 32°C and 39°C, respectively. It is inferred that this type of inoculum might be used in reactors of anaerobic digestion processes for the treatment of the cassava wastewater at the ambient temperature of the semiarid region. MenosThe production of starch generates, as a by-product, the cassava wastewater (manipueira), which can be treated by anaerobic digestion to provide biogas and minimize its polluting potential. The most commonly utilized biomass in the anaerobic digestion is the anaerobic sludge. The literature presents, as an alternative to sludge, bovine manure and ruminal fluids, being scarce the studies with the cassava wastewater. This research evaluated the influence of temperature on the microbial ability of cattle and goat rumen in anaerobically biodegrading the manipueira in substitution to the anaerobic sludge. The cattle and goat rumen specific methanogenic activities (SMA) were compared with that of the anaerobic sludge. Subsequently, by using the inoculum which had the best SMA results, cassava wastewater biodegradability tests were performed, investigating the kinetics of the organic matter removal and methane production at 32 ° C and 39 ° C. The bovine rumen presented better results in the SMA (0,315 g COD-CH4 g VSS.d-1) and methane production (1,026 mL). The temperature of 32 °C did not influence the activity of bovine ruminal inoculum as the kinetics of the biodegradation of the manipueira did not differ for the evaluated temperatures (0.1799 d-1 at 32°C and 0.1781 d-1 at 39°C). Bovine rumen achieved glucose reduction of 76% and 80% and methane yield of 77% and 79% for the tests at 32°C and 39°C, respectively. It is inferred that this type of inoculum might be used in reactors o... Mostrar Tudo |
Palavras-Chave: |
Águas residuais de mandioca; Resíduos de mandioca. |
Thesagro: |
Biodegradação; Mandioca; Rúmen. |
Thesaurus NAL: |
Biodegradability; Cassava; Methane; Methane production. |
Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/197823/1/manipueira-comunicata.pdf
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Marc: |
LEADER 02450naa a2200277 a 4500 001 2109392 005 2019-12-02 008 2019 bl uuuu u00u1 u #d 024 7 $a10.14295/CS.v10i1.3009$2DOI 100 1 $aAMORIM, M. C. C. de 245 $aAnaerobic biodegradation of cassava wastewater under different temperatures and inoculums.$h[electronic resource] 260 $c2019 520 $aThe production of starch generates, as a by-product, the cassava wastewater (manipueira), which can be treated by anaerobic digestion to provide biogas and minimize its polluting potential. The most commonly utilized biomass in the anaerobic digestion is the anaerobic sludge. The literature presents, as an alternative to sludge, bovine manure and ruminal fluids, being scarce the studies with the cassava wastewater. This research evaluated the influence of temperature on the microbial ability of cattle and goat rumen in anaerobically biodegrading the manipueira in substitution to the anaerobic sludge. The cattle and goat rumen specific methanogenic activities (SMA) were compared with that of the anaerobic sludge. Subsequently, by using the inoculum which had the best SMA results, cassava wastewater biodegradability tests were performed, investigating the kinetics of the organic matter removal and methane production at 32 ° C and 39 ° C. The bovine rumen presented better results in the SMA (0,315 g COD-CH4 g VSS.d-1) and methane production (1,026 mL). The temperature of 32 °C did not influence the activity of bovine ruminal inoculum as the kinetics of the biodegradation of the manipueira did not differ for the evaluated temperatures (0.1799 d-1 at 32°C and 0.1781 d-1 at 39°C). Bovine rumen achieved glucose reduction of 76% and 80% and methane yield of 77% and 79% for the tests at 32°C and 39°C, respectively. It is inferred that this type of inoculum might be used in reactors of anaerobic digestion processes for the treatment of the cassava wastewater at the ambient temperature of the semiarid region. 650 $aBiodegradability 650 $aCassava 650 $aMethane 650 $aMethane production 650 $aBiodegradação 650 $aMandioca 650 $aRúmen 653 $aÁguas residuais de mandioca 653 $aResíduos de mandioca 700 1 $aSILVA, P. T. de S. e 700 1 $aBARBOSA, P. S. 700 1 $aMONTEFUSCO, N. E. 773 $tComunicata Scientiae$gv. 10, n. 1, p. 65-76, 2019.
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Registro original: |
Embrapa Semiárido (CPATSA) |
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Fechar
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Registro completo
Biblioteca(s): |
Catálogo Coletivo de Periódicos Embrapa; Embrapa Amazônia Oriental. |
Identificador: |
503 |
Data corrente: |
09/05/2002 |
Data da última atualização: |
12/05/2015 |
Código do título: |
0901372 |
ISSN: |
0100-1922 |
Código CCN: |
003459-2 |
Título e Subtítulo: |
ANAIS DA BIBLIOTECA NACIONAL |
Título alternativo: |
ANAES DA BIBLIOTHECA NACIONAL |
Entidade: |
Biblioteca Nacional do Rio de Janeiro |
Local de publicação: |
Rio De Janeiro, RJ |
Periodicidade: |
Anual |
Inicio de publicação: |
1876 |
Coleções da unidade: |
Embrapa Amazônia Oriental 1883 11; 1884/85 12; 1886 14(1-2); 1887/88 15(1/2); 1889/90 16(1-2); 1891/92 17; 1896 18; 1898 20; 1899 21; 1900 22; 1901 23; 1903 25; 1904 26; 1905 27; 1906 28; 1907 29; 1908 30; 1909 31; 1910 32; 1911 33; 1912 34; 1913 35; 1914 36; 1915 37; 1916 38; 1917 39; 1918 40; 1919 41; 1920 42; 1924 46; 1925 47; 1927 49; 1928 50; 1929 51; 1930 52; 1931 53; 1932 54; 1933 55; 1934 56; 1935 57; 1936 58; 1937 59; 1938 60; 1948 66, 67; 1949 68; 1950 69, 70; 1951 71, 72; 1953 74; 1954 73; 1955 75; 1956 76; 1957 77; 1958 78; 1959 79; 1960 80; 1962 82; 1963 83; 1964 84; 1965 85; 1966 86; 1967 87; 1968 88; 1969 89; 1970 90; 1971 91; 1972 92(3,6-8); 1973 93; 1974 94; 1975 95(1-2); 1976 96; 1977 97; 1978 98; 1980 100; 1981 101; 1982 102; 1983 103; 1985 105; 1986 106; 1987 107; 1988 108; 1989 109; 1990 110; 1991 111; 1992 112; 1993 113; 1994 114 Classificação: 981.05A6 |
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