Recycling of poor quality urban wastewater by drip irrigation systems

Capra, Antonina; Scicolone, B.

doi:10.1016/j.jclepro.2006.07.032

Cited by 162 publications

(94 citation statements)

References 17 publications

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“…Table 3. Follow-up analysis of the interaction dripper x time for the relative flow rate of the four models of drippers subjected to the use of treated sewage effluent as irrigation water In the wastewater tanks, there is a great variety of phytoplankton and zooplankton, algae and bacteria that can agglomerate with solid particles suspended in the water and also with the mucilage (Capra & Scicolone, 2007), causing problems in the flow rate of the dripper pipes. It is probable that the presence of solids, chemical substances (such as iron and sodium) and microorganisms may have interfered with the membrane of compensation of the drippers, consequently leading to alteration in flow rate.…”

Section: Resultsmentioning

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: Resultsmentioning

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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“…In a biochemical study in Italy, Capra and Scicolone ( 2007 ) found that the use of wastewater with a TSS greater than 50 mg/L did not permit optimal emission uniformity to be achieved. Correlations of biofi lm biomass and discharge reduction after 360 h irrigation were computed that suggested that phospholipid fatty acids (PFLAs) provided the best correlation coeffi cient.…”

Section: Irrigation Equipmentmentioning

confidence: 97%

Global Experiences on Wastewater Irrigation: Challenges and Prospects

Valipour

Singh

2016

Water Science and Technology Library

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The need for irrigated agriculture is growing day by day and the largest water withdrawals from renewable water resources are for irrigation. In addition, the available water resources are decreasing and we need to use non-conventional water resources for irrigation due to looming water crisis (Raschid-Sally and Jayakody, Drivers and characteristics of wastewater agriculture in developing countries: results from a global assessment. International Water Management Institute, Colombo, 35p, (IWMI Research Report 127), 2008). However, the volume of treating and using wastewater is limited due to the lack of adequate data and knowledge and/or negative effects of improper wastewater management (i.e. use of untreated wastewater). A comprehensive evaluation of what has been done is necessary in order to explore wastewater irrigation and to avoid trial-and-error policies. Although a study of wastewater irrigation from crops, soil, groundwater, health, irrigation equipments, modern technologies, and other environmental aspects is useful, management studies in comparison with other aspects can help lead to more reliable and more extensive fi ndings and fi nally a better decision on using wastewater for irrigation. The chapter presents challenges and prospects that may help decision making for the use of wastewater in irrigation.

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“…Com isto, o consumo de água é reduzido quando comparado a outros sistemas de irrigação. Quando bem manejada, permite uma eficiência maior de aplicação de água em consequência de um controle melhor da lâmina aplicada, menores perdas por evaporação e, praticamente, nenhuma perda por percolação e escoamento superficial mas para a realização de um manejo eficiente de água é necessário que a uniformidade de aplicação de água pelos emissores seja a maior possível (Faria et al, 2004;Capra & Scicolone, 2007).…”

Section: Introductionunclassified

Efeito da aplicação de vácuo no desempenho de diferentes modelos de gotejadores sob duas condições de textura de solo

Coelho

Júnior²,

Mendoza

et al. 2013

Rev. bras. eng. agríc. ambient.

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RESUMONa irrigação localizada com gotejadores posicionados de modo subsuperficial há o risco potencial de partículas de solo serem succionadas através do orifício de saída de água, em virtude da ocorrência de vácuo podendo resultar no entupimento dos mesmos. Objetivou-se, com este trabalho, avaliar o efeito da aplicação de vácuo no desempenho de diferentes modelos de gotejadores sob duas condições de textura de solo e posicionados de modo subsuperficial. Os tratamentos consistiram da aplicação dos níveis de sucção de -10, -15, -20 e -40 kPa, em solos de textura arenosa e argilosa, em 23 modelos de gotejadores usados com mais de 1 ano de funcionamento. O desempenho dos emissores no gotejamento subsuperficial foi influenciado pela textura do solo. De modo geral, em 80% dos emissores o vácuo de -40 kPa proporcionou obstrução nos emissores e redução da vazão, em ambas as texturas de solo. A maior redução de uniformidade de aplicação de água ocorreu com o modelo Irrimon Irridrip Plus 2,5 L h -1 na condição de solo arenoso e aplicação de 40 kPa de sucção. Palavras-chave: gotejamento subsuperficial, obstrução, redução de vazãoEffect of vacuum on the performance of different models of drippers under two conditions of soil texture ABSTRACT In drip irrigation with emitters positioned subsurfacely there is the potential risk of soil particles being suctioned through the water outlet port, due to the occurrence of vacuum which may result in clogging of drippers. The objective of this study was to evaluate the effect of vacuum on the performance of different models of subsurface positioned drippers under two conditions of soil texture. The treatments consisted of applying suction levels of -10, -15, -20 and -40 kPa in sandy and clayey soils in 23 models of used drippers with more than 1 year of operation. The performance of the subsurface drip emitters was influenced by soil texture. Overall, in 80% of drippers , -40 kPa vacuum caused the obstruction of emitter and reduced flow in both soils. The largest reduction of uniformity of water application was observed in model Irrimon Irridrip Plus 2.5 L h -1 in sandy soil and application of 40 kPa suction.

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Recycling of poor quality urban wastewater by drip irrigation systems

Cited by 162 publications

References 17 publications

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

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

Global Experiences on Wastewater Irrigation: Challenges and Prospects

Efeito da aplicação de vácuo no desempenho de diferentes modelos de gotejadores sob duas condições de textura de solo

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