Comportamento de gotejadores submetidos aplicação de ferro solúvel, sólidos em suspensão e fitoplâncton

Carvalho, L.; Coelho, Rubens Duarte; Teixeira, Marconi Batista; Cunha, Fernando Nobre; Silva, N. F. da

doi:10.7127/rbai.v8n600265

Cited by 2 publications

(1 citation statement)

References 3 publications

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“…Corroborating these results, Carvalho et al (2014) evaluated the susceptibility of different dripper pipes to clogging due to the application of soluble iron, organic load and solids in suspension, and observed that two models of drippers showed increase in relative flow rate because of an imbalance in the membrane of compensation. Such imbalance may have occurred through the deposition of physical particles between the membrane or even the amount of chemical elements in the effluent, which may damage the membrane.…”

Section: Methodsmentioning

confidence: 99%

Performance of pressure-compensating emitters using treated sewage effluent for irrigation

Filho

Oliveira

Dalri

et al. 2016

Rev. bras. eng. agríc. ambient.

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A B S T R A C TThis study aimed to evaluate the flow variation of pressure-compensating emitters using treated sewage effluent (TSE). A drip irrigation system with four types of pressurecompensating emitters (G1 -Naan Dan Jain Model Top Drip, G2 -Naan Dan Jain Model Naan PC, G3 -Drip-Plan, G4 -Naan Dan Jain Model Naan Amnon) was installed with TSE from the sewage treatment station, filtered through a disc filter (120 mesh). Seven evaluations of flow rate of the drippers were performed (0, 100, 200, 300, 400, 500 and 600 h of operation) operating at 100 kPa. The experimental design was completely randomized in a 4 x 7 factorial arrangement (4 models and 7 times) with four replicates and Tukey test to compare the means. The relative flow rate (Qr), flow rate coefficient of variation (CVQ) and degree of clogging (DC) were determined. It was found that the models of emitters were not much susceptible to clogging during the operation of the system. The G4 model showed better performance compared with the others, presenting mean Qr of 99.92%, CVQ of 2.69% and DC of 1.19% at the end of the experiment. The results revealed that emitters are affected by the time of use of TSE.

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Section: Methodsmentioning

confidence: 99%

Performance of pressure-compensating emitters using treated sewage effluent for irrigation

Filho

Oliveira

Dalri

et al. 2016

Rev. bras. eng. agríc. ambient.

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Flow rate dynamics of pressure-compensating drippers under clogging effect

Pinto

Molle

Alves

et al. 2017

Rev. bras. eng. agríc. ambient.

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A B S T R A C TThe clogging dynamics of pressure-compensating drippers is still poorly addressed, and its understanding is quite important to control clogging. The aim of this study was to evaluate the flow performance of pressure-compensating drippers under clogging effect. Eight pressure-compensating emitters, model J-SC Jain PC-PLUS with nominal flow rate of 2.2 L h -1 were evaluated. The tests were run for 8 h d -1 for 4 weeks, a total of 160 h. Every 40 h, the concentration and granulometry of suspended particles were increased, by adding 125 mg L -1 of solids, composed of sand. The flow rate of the emitters was determined using a weight measurement system. Flow rate variations of the emitters did not follow a defined pattern. Clogging seems to occur randomly and abruptly. Sometimes the flow rate exceeded the nominal value (maximum relative flow rate of 182%) and other times it was lower than the nominal value (minimum relative flow rate of 0%). Dinâmica da vazão de gotejadores autocompensantes sob o efeito da obstrução R E S U M OA dinâmica da obstrução de emissores autocompensantes ainda é pouco conhecida, apesar de seu entendimento ser de fundamental importância para o controle da obstrução. O objetivo deste trabalho foi avaliar, em laboratório, o comportamento da vazão de gotejadores autocompensantes sob o efeito da obstrução. Avaliaram-se 8 emissores autocompensantes, modelo Jain J-SC PC-PLUS com vazão nominal de 2,2 L h -1 em ensaios com duração de 8 h d -1 , durante 4 semanas totalizando 160 h. A cada 40 h eram incrementadas a concentração e a granulometria de partículas, sendo adicionados 125 mg L -1 de sólidos, compostos por areia. A vazão dos emissores foi determinada por sistema de medição de massa. Verificou-se que as variações de vazão dos emissores não apresentaram padrão definido, ocorrendo de forma aleatória e em sua maioria de forma brusca, às vezes apresentando vazões superiores à vazão nominal (vazão máxima relativa de 182%); outras vezes, vazões inferiores (vazão mínima relativa de 0%).

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Comportamento de gotejadores submetidos aplicação de ferro solúvel, sólidos em suspensão e fitoplâncton

Cited by 2 publications

References 3 publications

Performance of pressure-compensating emitters using treated sewage effluent for irrigation

Performance of pressure-compensating emitters using treated sewage effluent for irrigation

Flow rate dynamics of pressure-compensating drippers under clogging effect

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