Fouling in Microirrigation Systems Applying Treated Wastewater Effluents

Dosoretz, Carlos G.; Tarchitzky, Jorge; Katz, Ilan; Kenig, E.; Chen, Yona

doi:10.1002/9781444328561.ch10

Cited by 10 publications

(3 citation statements)

References 63 publications

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“…The geometry of the channel promotes the dissipation of the turbulent kinetic energy due to the zigzag flow path. However, the labyrinth channel is narrow (cross-section of around 1 mm) and the flow is thus sensitive to clogging (Liu and Huang, 2009;Niu et al, 2013), which reduces irrigation uniformity (Dosoretz et al, 2010) and requires more frequent maintenance (e.g. cleaning, replacing irrigation lines).…”

Section: Introductionmentioning

confidence: 99%

Hydrodynamic effect on biofouling of milli-labyrinth channel and bacterial communities in drip irrigation systems fed with reclaimed wastewater

Lequette

Ait-Mouheb

Wéry

2020

Science of The Total Environment

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The clogging of drippers due to the development of biofilms reduces the benefits and is an obstacle to the implementation of drip irrigation technology. The geometry of the dripper channel has an impact on the flow behaviours and head loss. The objective of this study was to analyse the influence of hydrodynamic parameters of three types of drippers (flow rates of 1, 2 and 4 l.h -1 ) fed by reclaimed wastewater on biofilm development kinetics and on the bacterial community. Using optical coherence tomography, we demonstrated that the inlet of the drippers (mainly the first baffle) and vortex zones are the most sensitive area for biofouling. Drippers .

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Section: Introductionmentioning

confidence: 99%

Hydrodynamic effect on biofouling of milli-labyrinth channel and bacterial communities in drip irrigation systems fed with reclaimed wastewater

Lequette

Ait-Mouheb

Wéry

2020

Science of The Total Environment

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“…However, since plenty of microorganisms, nitrogen, phosphorous, and inorganic salt are present in RW, biofilms inevitably appear in the narrow flow path (0.5–1.2 mm) (Li et al ., 2006) of drip emitters, thus causing emitter clogging (Xiao et al ., 2020a). Emitter clogging can reduce irrigation uniformity and even leads to the scrapping of irrigation systems (Dosoretz et al ., 2010). So far, biofilm mitigation was mainly achieved by the periodical application of chemicals acids (e.g., chlorination) (Katz et al ., 2014; Song et al ., 2017).…”

Section: Introductionmentioning

confidence: 99%

Bacillus amyloliquefaciens application to prevent biofilms in reclaimed water microirrigation systems*

Wen

Xiao

Song

et al. 2020

Irrigation and Drainage

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Reclaimed water (RW) applied in drip irrigation systems could be a solution to cope with the challenges of limited freshwater resources. Biofilm growth in irrigation systems is an unavoidable issue when using RW. To date, strong chemical bactericides mostly dominate the commercial market in controlling biofilms. However, recently scientists have been concerned about their real efficacy and environmental risks. This study assesses a low‐concentration microbial antagonist (i.e., Bacillus amyloliquefaciens inoculums, BAI) intermittently injected into the systems to mitigate biofilm formation in three types of drip emitters using two kinds of treated RW. The results indicated that the application of BAI significantly (p < .05) mitigated the microbial biomass within biofilms when compared with the control groups (no‐BAI). In addition, BAI reduced the contents of extracellular polysaccharides and proteins of biofilms, which decreased the total biomass in BAI treatments by 44.9%–73.8%. Consequently, BAI effectively improved the emitter performances and increased the discharge variation rate by 31.9%–44.3%. These findings might provide a new perspective to control biofouling when applying RW in irrigation systems, with potential implications for sustainable water management in agricultural production.

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“…O sistema de irrigação por gotejamento é o mais aceito para o reúso de efluentes pelas agências regulamentadoras, pois limita o contato da água residuária com o público exposto e com a cultura. Apesar da elevada eficiência, a principal limitação desse sistema é a sensibilidade de obstrução dos emissores por contaminantes físicos, biológicos e químicos presentes nas águas (DOSORETZ et al, 2011). Devido a importância da qualidade da água no funcionamento de sistemas de irrigação localizados, Bucks, Nakayama e Gilbert (1979) Irriga, Botucatu, v. 22, n. 3, p. 575-590, julho-setembro, 2017 descreveram os componentes que podem ocasionar obstrução dos emissores e desenvolveram uma classificação quanto ao potencial de entupimento.…”

Section: Introductionunclassified

Desempenho Da Irrigação Por Gotejamento Com O Uso De Efluente De Laticínio Tratado Por Processo Biológico

Macan¹,

Gomes²,

Rossi³

et al. 2017

R_I

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DESEMPENHO DA IRRIGAÇÃO POR GOTEJAMENTO COM O USO DE EFLUENTE DE LATICÍNIO TRATADO POR PROCESSO BIOLÓGICO NATALIA PRADO FORTUNA MACAN1; TAMARA MARIA GOMES2; FABRÍCIO ROSSI3 E GIOVANA TOMMASO4 1Eng. de Biossistemas, Mestranda em Engenharia Agrícola, FEAGRI/UNICAMP, Av. Cândido Rondon, 501 - Cidade Universitária, Campinas - SP, 13083-875, Brasil. E-mail: npfortuna@gmail.com2Eng. de Biossistemas, Profa. Doutora no Depto. de Engenharia de Biossistemas, FZEA/USP, Pirassununga-SP, R. Duque de Caxias, 225 - Campus Fernando Costa, Pirassununga - SP, 13635-900 Brasil. E-mail: tamaragomes@usp.br3Eng. de Biossistemas, Prof. Doutor, Depto. de Engenharia de Biossistemas, FZEA/USP, Pirassununga-SP, Brasil. E-mail: fabricio.rossi@usp.br. 4Eng. de Alimentos, Profa. Doutora, Depto. de Engenharia de Alimentos, FZEA/USP, Pirassununga-SP, Brasil. E-mail: tommaso@usp.br 1 RESUMO Os laticínios geram efluentes que podem ser reaproveitados na irrigação. No entanto, o efeito desses efluentes nos sistemas de irrigação ainda é pouco estudado. Assim, os objetivos desse trabalho foram caracterizar o efluente de laticínio tratado por processos biológicos, classifica-lo quanto ao potencial de entupimento de emissores e avaliar a uniformidade do sistema de irrigação por gotejamento por meio da determinação dos coeficientes de uniformidade de distribuição (CUD), de Christiansen (CUC) e estatístico (CUE). O delineamento experimental foi em blocos casualizados, em esquema fatorial 3 x 3, com quatro repetições e avaliações dos coeficientes ao longo do tempo. Os tratamentos foram constituídos de três fontes de água: água de abastecimento (AB); efluente de laticínio tratado por sistema anaeróbio (EAN) e por sistema aeróbio (EA); e por três lâminas de irrigação, 50% (W1), 100% (W2) e 150% (W3) da evapotranspiração da cultura da beterraba. Após 40 horas de funcionamento, CUD, CUC e CUE foram classificados como “Excelente”, com valores superiores a 96%. As diferentes lâminas aplicadas não influenciaram nos coeficientes. Entretanto, ao longo do tempo, as três fontes de água utilizadas ocasionaram diminuição do CUD, CUC e CUE, sendo que a maior redução foi encontrada nas parcelas que utilizaram efluente anaeróbio. Palavras-chave: água residuária, reúso, coeficiente de uniformidade, gotejador, tratamento anaeróbio e aeróbio. MACAN, N. P. F.; GOMES, T. M.; ROSSI, F.; TOMMASO, G.PERFORMANCE OF DRIP IRRIGATION SYSTEM USING DAIRY EFFLUENT TREATED BY BIOLOGICAL PROCESS 2 ABSTRACT The dairy industry produces effluents that can be reused on irrigation. However, the effect of these effluents on the irrigation systems is still little studied. Thus, the goals of this work were to characterize the dairy effluent treated by biological processes, classify it for its potential to cause emitter clogging, and evaluate the drip irrigation system uniformity by determination of emission uniformity coefficient (EUC), Christiansen coefficient (CUC), and Statistical uniformity coefficient (SUC). The experimental design was performed in randomized blocks, with a 3 x 3 factorial design, four replications, and coefficients evaluation over the time. The treatments consisted of three types of water: freshwater (AB), dairy effluent treated by anaerobic processes (EAN), and effluent treated by aerobic processes (EA) at three irrigation depths – 50% (W1), 100% (W2), and 150% (W3) – of the estimated table beet evapotranspiration. After 40 hours of irrigation, EUC, CUC e SUC were classified as excellent, with values greater than 96%. The different irrigation depths did not affect the uniformity coefficients. However, the use of the three water sources led to EUC, CUC and SUC reduction over time, and the largest reduction was found on plots that used anaerobic effluent. Keywords: agro-industry, uniformity coefficient, emitter, reuse, anaerobic and aerobic treatment.

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Fouling in Microirrigation Systems Applying Treated Wastewater Effluents

Cited by 10 publications

References 63 publications

Hydrodynamic effect on biofouling of milli-labyrinth channel and bacterial communities in drip irrigation systems fed with reclaimed wastewater

Hydrodynamic effect on biofouling of milli-labyrinth channel and bacterial communities in drip irrigation systems fed with reclaimed wastewater

Bacillus amyloliquefaciens application to prevent biofilms in reclaimed water microirrigation systems*

Desempenho Da Irrigação Por Gotejamento Com O Uso De Efluente De Laticínio Tratado Por Processo Biológico

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