Drip Units Operating With Dilute Landfill Leachate

Mesquita, Francisco de Oliveira; Alves, Silas Franco dos Reis; Batista, Rafael Oliveira; Dantas, Tarcísio Batista; Souza, Luíz Di

doi:10.1590/1983-21252016v29n119rc

Cited by 3 publications

(4 citation statements)

References 22 publications

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“…These results are in accordance with those found by Mesquita et al (2016b) Table 4. Mean values for FCV (%) for the factor dripper type for each level of time of application of the effluent and water, with the respective ASAE EP 405 classification (Asabe, 2003).…”

Section: Resultssupporting

confidence: 93%

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Flow rate variation and biological agents that obstruct drippers of swine effluent

et al. 2018

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Emitter clogging is the major problem of drip irrigation systems operating with wastewater. The objective of this study was to evaluate the alteration of the flow rate variation coefficient (FVC) and to identify the biological agents that cause obstruction in drip units operating with swine effluent and public water supply. The experiment was set up in a split-plot scheme, with the times of application of swine effluent and public water supply in the main plots and dripper types in the secondary parcels, evaluating times of FVC in the tertiary parcels, using a completely randomized design (CRD) with three repetitions. The FVC of the drip subunits was calculated on every 40 hours as well as the microscopic analysis of the biological agents of clogging, until 160 h. At the end of the tests, biofilm samples were collected in each drip unit to identify the groups of predominant bacteria. The results indicated that the FVC was effective in detecting the clogging of the emitters, evidencing that the construction characteristics and the times of application of swine effluent and of the public water supply interfere in this process. Microscopic analyzes of the biofilm indicated that the main biological agents that caused obstruction were algae, bacteria, fungi and protozoa.

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Section: Resultssupporting

confidence: 93%

“…Sci., Bom Jesus, v.9, n.2, p.125-132, Apr./Jun. 2018 emitters, there are several indicators of hydraulic performance, however the coefficient of variation of the flow is an indicator that has been used in several studies with wastewater (Silva et al, 2013;Batista et al, 2016;Mesquita et al, 2016b).…”

Section: Introductionmentioning

confidence: 99%

Flow rate variation and biological agents that obstruct drippers of swine effluent

et al. 2018

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“…The susceptibility to the clogging of emitters is a bottleneck that restricts the application and popularization of drip irrigation with wastewater. It is also strongly related to the formation of biofilms resulting from the interaction between physical, chemical and biological agents (Fernandes et al, 2014;Mesquita et al, 2016;Cunha et al, 2017;Silva et al, 2019). Biofouling formed on the emitter's internal devices is the main cause for clogging.…”

Section: Introductionmentioning

confidence: 99%

“…Two important impacts are usually occurred from the clogging of drip irrigation system emitters. They are changes in the design flow rate and the increase in the flow variation coefficient (Fernandes et al, 2014;Mesquita et al, 2016;Cunha et al, 2017), which directly interfere with water distribution uniformity. Through a simulation study, López-Mata et al (2010) proved that the increase in the uniformity of water distribution results in productivity increase of the corn crop.…”

Section: Introductionmentioning

confidence: 99%

June 2021

2021

Aust J Crop Sci

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The liquid residue called "produced water" from the exploitation of oil in the ground and sea is generated in large volumes and has significant polluting potential. In the Brazilian semiarid region, this liquid can be applied to the agricultural lands, if properly treated and applied to the soil by dripping. It is an alternative that can mitigate water scarcity and impacts on the environment. However, the vulnerability of drippers to clogging is a problem and can be mitigated with the dilution technique. The flow rate changes of drippers for the application of dilutions of produced water treated (PW) with underground water (UW) was analyzed. The experiment was conducted in a completely randomized split-split-plot design with three replications. Plots consisted of treatments (D1: 100% of UW, D2: 90% of UW and 10% PW, D3: 80% of UW and 20% of PW, D4: 70% of UW and 30% of PW and D5: 60% of UW and 40% of PW). The split-plots consisted of types of drippers (G1: 1.6 L h -1 , G2: -1.6 L h -1 , G3: 1.7 L h -1 ) and split-split-plots consisted of evaluation times (0, 40, 80, 120 and 160 h). Flow rate (D) and flow rate coefficient of variation (FCV) were taken every 40 hours untill 160 h. The results showed that the G3 emitter was the most resistant to clogging. The dilutions D2 and D3 provided the lowest losses in hydraulic performance in the drip units. The highest rates of clogging occurred in the G2 emitter operating in the D5 dilution.

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Hydraulic Performance of Drippers Applying Sanitary Landfill Leachate Diluted in Water

et al. 2018

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Drip irrigation with diluted sanitary landfill leachate favors the development of grasses on the landfill surface, however, the clogging of emitters of the irrigation systems is the major obstacle for this practice. The objective of this study was to select empirical models of the Christiansen's uniformity coefficient, distribution uniformity coefficient, and statistical uniformity coefficient of drip irrigation sets applying sanitary landfill leachate diluted in water as a function of time of operation, and quality of the effluent. An experiment was conducted in a completely randomized experimental design with three replicates, using a split-split plot arrangement, with operating pressures (70, 140, 210, and 280 kPa) in the plots, types of drippers (G1, 1.65 L h-1; G2, 2.0 L h-1; and G3, 4.0 L h-1) in the subplots, and operating time of the drip irrigation sets (0, 20, 40, 60, 80, 100, 120, 140, and 160 hours) in the sub-subplots. Data regarding hydraulic performance and effluent quality were acquired every 20 hours during 160 hours of operation and subjected to simple and multiple regression analyses. The G3 dripper operating at pressures of 70 and 140 kPa were the combinations that best attenuated biofilm clogging. The linear regression and square root were the models that best represented the reduction in the uniformity of the effluent application as a function of the operating time of the drip irrigation sets. The linear correlations denoted that calcium contents and total coliform population rates were the characteristics of the sanitary landfill leachate that most affected the drip clogging process.

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Drip Units Operating With Dilute Landfill Leachate

Cited by 3 publications

References 22 publications

Flow rate variation and biological agents that obstruct drippers of swine effluent

Flow rate variation and biological agents that obstruct drippers of swine effluent

June 2021

Hydraulic Performance of Drippers Applying Sanitary Landfill Leachate Diluted in Water

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