Effects of average velocity on the growth and surface topography of biofilms attached to the reclaimed wastewater drip irrigation system laterals

Li, Gui Bing; Li, Yun Kai; Xu, Ting; Liu, Yao Ze; Jin, Hui; Pei, Yang; Yan, Da Zhuang; Ren, Shuai; Tian, Zhi Fang

doi:10.1007/s00271-011-0266-4

Cited by 57 publications

(28 citation statements)

References 27 publications

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“…Their results partially conform to the fi ndings of this study. It was shown that the suspended particles in reclaimed water are fl occulent and porous [39]. The uniformity of distribution of these pores was reported to be increasing with the size of the solids.…”

Section: Particles In Watermentioning

confidence: 99%

Emitter clogging in a reclaimed water irrigation scheme with controlled suspended load

Oliver¹,

Pezzaniti²,

Hewa³

2014

Int. J. SDP

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Emitter clogging in drip irrigation system is a very common problem when used with reclaimed water. The suspended solids from treated water are the major elements of clogging mechanism. Coupled with bacterial biofi lms, these particulates can reduce the fl ow of emitters by creating barriers in the fl ow path. This experimental study reports the performance of three types of pressure compensated emitters in a drip irrigation system. Reclaimed water with a sediment load of 10 mg/l was supplied in the system throughout the experiment. Four ranges of particle sizes (0-45, 45-90, 90-150, and 150-300 µm) were used during 770 h of intermittent irrigation. Low fl ow emitters (<2 l/h) were found to be clogged quicker than those with higher fl ow rates. Though fl ushing of the system did not help in discharge recovery of the partially clogged emitters, it helped regain the lateral fl ow. The interior geometry of biofi lms was found to be built only by the smaller particles. Larger particles (>50 µm) only appeared around the perimeters of matured biofi lms making the surface topography very coarse and undulating.

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Section: Particles In Watermentioning

confidence: 99%

Emitter clogging in a reclaimed water irrigation scheme with controlled suspended load

Oliver¹,

Pezzaniti²,

Hewa³

2014

Int. J. SDP

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“…However, drip irrigation systems show high susceptibility to emitter clogging (Liu & Huang, 2009;Li et al, 2011; when wastewater is applied (Dazhuang et al, 2009;Yan et al, 2009;Batista et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Biological treatment of drippers clogged by the use of treated domestic wastewater

Costa

Batista

Vale

et al. 2016

Rev. bras. eng. agríc. ambient.

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A B S T R A C TThis study aimed to recover the flow rate of clogged drippers with different doses and permanence times of the product MaxBio. The experiment was conducted in a completely randomized design in split-split-plot scheme, where the plots corresponded to product doses (80, 160, 240 and 320 mg L -1 ), subplots to the applied treatments (T1 -without biological treatment, T2 -1 st application of the product, and T3 -2 nd application of the product) and in sub-subplots the types of emitters (Plastro Hydrodrip Super, Netafim Tiran and Netafim PCJ-CNJ), with three replicates. The four irrigation units operated with treated domestic wastewater for 400 h in order to clog the emitters. After applying the product MaxBio, the flow rate of the drippers and the relative flow rate reduction were determined to express the unclogging levels. There was significant effect of T2 and T3 on the recovery of the flow rate of the drippers, while for the reduction of relative flow rate, the doses of the product did not show statistical difference regarding the types of drippers.Tratamento biológico de gotejadores obstruídos pelo uso de efluente doméstico tratado R E S U M O Objetivou-se, neste trabalho, recuperar a vazão de gotejadores obstruídos com diferentes dosagens e tempos de permanência do produto MaxBio. O experimento foi montado no delineamento inteiramente casualizado em esquema de parcelas subsubdivididas tendo, nas parcelas, as doses do produto (80, 160, 240 e 320 mg L -1 ), nas subparcelas, os tratamentos aplicados (T1 -sem tratamento biológico; T2 -1ª aplicação do produto e T3 -2ª aplicação do produto) e, nas subsubparcelas, os tipos de gotejadores (Plastro Hydrodrip Super, Netafim Tiran e Netafim PCJ-CNJ), em três repetições. As quatro unidades de irrigação operaram com água residuária doméstica tratada, durante 400 h proporcionando a obstrução dos gotejadores. Após aplicação do produto MaxBio a vazão dos gotejadores e a redução da vazão relativa foram determinadas para expressar os níveis de desobstrução. Na recuperação da vazão dos gotejadores houve efeito significativo dos tratamentos T2 e T3 enquanto para a redução da vazão relativa às doses do produto não apresentaram diferença estatística em relação aos tipos de gotejadores.

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“…One of the problems that the drip irrigation system offers is the possibility of clogging of emitters in the field, due to the low flow drippers (0.6 to 3.5 L h -1 ), necessary for the economic viability of the system, which is one of the biggest impediments to applications and popularization of this technology (Li et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

“…Hydraulic factors can also contribute in the process of clogging in the field like the inlet pressure, the flow and the speed of water circulation within the system (Capra & Scicolone, 2007;Li et al, 2012;Silva et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Methodology for Dimensioning of a Center Pivot Irrigation System Operating With Dripper Type Emitter

et al. 2017

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ABSTRACT:In Brazil, the conventional center pivot is widely used for irrigation of agricultural crops and its use has grown continuously. However, when improperly managed, it facilitates the development of diseases in all parts of the plant, with a direct effect on productivity, besides favoring losses of water by evaporation. The drip may be an alternative, since it minimizes the losses and does not wet the aerial parts of the plants, thereby reducing the incidence of diseases. A new system called localized mobile drip irrigation (IRGMO) is being developed in an attempt to combine the practicality and rusticity of the center pivot with the efficiency and water savings of the dripping irrigation systems. This fusion system is the central pivot with drip irrigation system for water distribution in the soil surface. This study aims to present a calculation methodology for the design of IRGMO system and compare it with conventional systems. It is concluded that this methodology allows the design of the IRGMO and that this new technology allows a savings of approximately 99% in a number of drip tubes compared to the conventional system with fixed drip irrigation lines in the field.

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Effects of average velocity on the growth and surface topography of biofilms attached to the reclaimed wastewater drip irrigation system laterals

Cited by 57 publications

References 27 publications

Emitter clogging in a reclaimed water irrigation scheme with controlled suspended load

Emitter clogging in a reclaimed water irrigation scheme with controlled suspended load

Biological treatment of drippers clogged by the use of treated domestic wastewater

Methodology for Dimensioning of a Center Pivot Irrigation System Operating With Dripper Type Emitter

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