Obstruction and uniformity in drip irrigation systems by applying treated wastewater

ABSTRACT The use of wastewater in agriculture is an alternative to control surface water pollution, and helps to promote the rational use of water. Therefore, the objective of this study was to evaluate the obstruction and uniformity of application of treated wastewater in drip irrigation systems. T...

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Published inRevista Ceres Vol. 64; no. 4; pp. 344 - 350
Main Authors Silva, Patrícia Ferreira da, Matos, Rigoberto Moreira de, Lima, Sabrina Cordeiro de, Dantas Neto, José, Lima, Vera Lúcia Antunes de
Format Journal Article
LanguageEnglish
Published Vicosa Universidade Federal de Viçosa-UFV, Revista Ceres 01.08.2017
Universidade Federal de Viçosa
Universidade Federal De Viçosa
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Summary:ABSTRACT The use of wastewater in agriculture is an alternative to control surface water pollution, and helps to promote the rational use of water. Therefore, the objective of this study was to evaluate the obstruction and uniformity of application of treated wastewater in drip irrigation systems. The study was conducted in a greenhouse at the Universidade Federal de Campina Grande. The treatments were composed by the factorial combination of two factors: three types of water (supply water-ABAST, effluent of a constructed wetland system -WETLAND and upflow of anaerobic reactor effluent followed by constructed wetland system -UASB + WETLAND), and two drip irrigation systems (surface and subsurface), set in a completely randomized design, with four replications. The results indicated that the pH, suspended solids, total iron and coliforms of the WETLAND and UASB + WETLAND treatments represented a severe risk of clogging of drippers; the flow of the emitters increased as the service pressure was increased; values of CUC and CUD in surface and subsurface drip were classified as excellent in ABAST and WETLAND treatments. The degree of clogging reduced as pressure under surface and subsurface drip was increased. RESUMO A utilização de águas residuárias na agricultura é uma alternativa para controle da poluição das águas superficiais, contribuindo para a promoção do uso racional da água. Assim, objetivou-se com o presente estudo avaliar a obstrução e uniformidade de de sistemas de irrigação por gotejamento aplicando-se água residuária tratada. A pesquisa foi conduzida em casa de vegetação na Universidade Federal de Campina Grande. Os tratamentos foram compostos pela combinação de dois fatores: três tipos de água (água de abastecimento-ABAST, efluente de sistema alagado construído-WETLAND e efluente de reator anaeróbio de fluxo ascendente seguido de sistema alagado construído-UASB+WETLAND), e dois sistemas de irrigação por gotejamento (superficial e subsuperficial), organizados em delineamento inteiramente casualizado, com quatro repetições, os fatores arranjados em esquema fatorial 3x2. Os resultados obtidos indicaram que as características pH, sólidos suspensos, ferro total e nível populacional de coliformes nos tratamentos WETLAND e UASB+WETLAND, representaram risco severo de entupimento de gotejadores; a vazão dos emissores aumentou com a elevação da pressão de serviço; os valores de CUC e CUD no gotejo superficial e subsuperficial foram classificados como excelentes nos tratamentos ABAST e WETLAND. O grau de entupimento reduziu com o aumento da pressão estudada no gotejo superficial e subsuperficial.
ISSN:0034-737X
2177-3491
0034-737X
2177-3491
DOI:10.1590/0034-737x201764040002