EFEITO DE DISTINTAS PRESSÕES DE SERVIÇO NA DETERMINAÇÃO DA VAZÃO EM SISTEMAS DE IRRIGAÇÃO POR GOTEJAMENTO OPERANDO COM EFLUENTE DO PROCESSAMENTO DA CASTANHA DE CAJU

Authors

  • Ketson Bruno Silva UFERSA
  • Rafael Oliveira Batista UFERSA
  • Simone Keily Silva UFERSA
  • Nildo Silva Dias UFERSA
  • Monalisa Soares Costa UFERSA

DOI:

https://doi.org/10.30969/acsa.v8i4.240

Keywords:

água residuária, emissores, entupimento, volume

Abstract

O presente trabalho objetivou analisar o efeito de distintas pressões de serviço na determinação da vazão de efluente em sistemas de irrigação por gotejamento operando com água residuária gerada no processamento da castanha de caju. O experimento foi montado em esquema de parcelas subsubdivididas, tendo nas parcelas as pressões de serviço (70, 140, 210 e 280 kPa), nas subparcelas os modelos de gotejadores (G1, G2 e G3) e nas subsubparcelas os períodos das avaliações (0, 20, 40, 60, 80, 100, 120, 140 e 160 horas), no delineamento inteiramente casualizado com três repetições. A vazão das unidades de irrigação, bem como as características físico-química e microbiológica do efluente foram determinadas a cada 20 h até completar o tempo de operação de160 h. Os resultados indicaram que a água residuária da castanha de caju representa risco de obstrução de gotejadores em relação às características pH, cálcio, magnésio, manganês, sólidos suspensos e coliformes totais; a formação de biofilme resultante da interação entre os agentes físico, químico e biológico propiciou entupimento parcial dos gotejadores e, consequentemente, redução na uniformidade de aplicação de efluente das unidades de irrigação; e as unidades de irrigação que funcionaram na pressão de serviço P1 (70 kPa) apresentaram maior nível de entupimento de gotejadores em relação as demais, em função da menor velocidade de escoamento de efluente no interior dos emissores.

Author Biography

  • Ketson Bruno Silva, UFERSA
    Mestre em Irrigação e Drenagem, formado pela Universidade Federal Rural do Semi-Árido (2012); Engenheiro Agrônomo, formado pela Universidade Federal Rural do Semi-Árido (2009).

References

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Published

2012-12-05

Issue

Vol. 8 No. 4 (2012)

Section

Original Articles / Artigos de Pesquisa

License

Termo de cessão de direitos autorais da Revista Agropecuária Científica no Semiárido:

Esta é uma revista de acesso livre, onde, utiliza o termo de cessão seguindo a lei nº 9.610/1998, que altera, atualiza e consolida a legislação sobre direitos autorais no Brasil.

Autores que publicam na Revista Agropecuária Científica no Semiárido(ACSA) concordam com os seguintes termos:O(s) autor(es) doravante designado(s) CEDENTE, por meio desta, cede e transfere, de forma gratuita, a propriedade dos direitos autorais relativos à OBRA à Revista Agropecuária Científica no Semiárido(ACSA), representada pelo CSTR/UFCG, estabelecida no Campus de Patos-PB doravante designada CESSIONÁRIA, nas condições descritas a seguir:

O CEDENTE declara que é (são) autor(es) e titular(es) da propriedade dos direitos autorais da OBRA submetida;

O CEDENTE declara que a OBRA não infringe direitos autorais e/ou outros direitos de propriedade de terceiros, que a divulgação de imagens (caso as mesmas existam) foi autorizada e que assume integral responsabilidade moral e/ou patrimonial, pelo seu conteúdo, perante terceiros;

O CEDENTE cede e transfere todos os direitos autorais relativos à OBRA à CESSIONÁRIA, especialmente os direitos de edição, de publicação, de tradução para outro idioma e de reprodução por qualquer processo ou técnica através da assinatura deste termo impresso que deverá ser submetido via correios ao endereço informado no início deste documento;

A CESSIONÁRIA passa a ser proprietária exclusiva dos direitos referentes à OBRA, sendo vedada qualquer reprodução, total ou parcial, em qualquer outro meio de divulgação, impresso ou eletrônico, sem que haja prévia autorização escrita por parte da CESSIONÁRIA.