Tratamento de esgoto sanitário em sistemas alagados construídos cultivados com lírio-amarelo

Prata, Renata C. C.; Matos, Antônio Teixeira de; Cecon, Paulo Roberto; Monaco, Paola Alfonsa Vieira Lo; Pimenta, Leonardo A.

doi:10.1590/s0100-69162013000600007

Cited by 20 publications

(16 citation statements)

References 21 publications

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“…It is believed that this difference in regrowth capacity is related to the redox behavior (Eh) of the porous medium, since the HSF-CW 2i, also cultivated with Tifton 85, did not present the same problem of regrowth. In the HSF-CWs, the Eh varies along the length and depth of the system, increasing from the input to output, and decreasing from the surface to the bottom (Kadlec & Wallace, 2008;Matos et al, 2010;Prata et al, 2013). Thus, it is believed that reversing the flow direction resulted in increased Eh in the first two thirds of the HSF-CW 2i, by virtue of SWW being applied to the third 3 (new affluent application position).…”

Section: Resultsmentioning

confidence: 99%

“…Horizontal subsurface flow constructed wetland systems (HSF-CWs), used in the treatment of wastewater, have advantages such as reduced cost and simplicity of operation, low mechanization demand, low maintenance requirement and good rates of efficiency (Fia, Matos, Fia, Borges, & Teixeira, 2012;Prata, Matos, Cecon, Lo Monaco, & Pimenta, 2013;Zhang et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

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<b>Effect of reversal of the flow direction on hydrodynamic characteristics and plants cultivated in constructed wetland systems

2016

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ABSTRACT. The objective of the present study was to evaluate the effect of reversal of the flow direction, when used the surface flow as an operating criteria, on hydrodynamic characteristics and plants grown in horizontal subsurface-flow constructed wetland systems (HSF-CWs). For this purpose, six HSFCWs were used: two non-cultivated (HSF-CWs 1 and 4), two cultivated with Tifton 85 grass (Cynodon spp.) (HSF-CWs 2 and 5) and two cultivated with Alternanthera (Alternanthera philoxeroides) (HSF-CWs 3 and 6). It was made a reversal in the flow direction of the HSF-CWs 1, 2 and 3. The reversal of the wastewater flow direction was performed when the superficial flow of the wastewater applied (SF) reached 50% of the length of the HSF-CWs. There was a single reversal for each system, on different dates. Reversing the flow direction promoted distinction on the dry matter yield of Tifton 85 grass. This was not observed in HSF-CWs cultivated with Alternanthera. The reversal of the wastewater flow direction promoted, in principle, the extinction of the SF advance in the HSF-CWs, but did not prevent its return. Waiting for the SF to reach 50% of the length was not the best criterion for reversing the flow direction.Keywords: clogging, wastewater treatment.Efeito da inversão no sentido do escoamento nas características hidrodinâmicas e nas plantas cultivadas em sistemas alagados construídos RESUMO. Neste trabalho, objetivou-se avaliar o efeito da inversão no sentido do escoamento, quando utilizado o escoamento superficial como critério operacional, nas características hidrodinâmicas e nas plantas cultivadas em sistemas alagados construídos de escoamento horizontal subsuperficial (SACs-EHSS), submetidos à inversão no sentido do escoamento. Para isso, foram utilizados seis SACs-EHSS: dois não cultivados (SACs-EHSS 1 e 4), dois cultivados com capim-tifton 85 (Cynodon spp.) (SACs-EHSS 2 e 5) e dois cultivados com alternantera (Alternanthera philoxeroides) (SACs-EHSS 3 e 6). Os SACs-EHSS 1, 2 e 3 foram submetidos à inversão no sentido do escoamento da água residuária, realizada quando se observou que o escoamento superficial da água residuária em tratamento (ES) alcançou 50% do comprimento do SAC-EHSS. Fez-se uma única inversão em cada sistema, em datas distintas. A inversão no sentido do escoamento promoveu distinção na produtividade do tifton 85. Não foi possível observar essa mesma distinção para a alternantera. A inversão no sentido do escoamento da água residuária promoveu, a princípio, a extinção do ES nos SACs-EHSS, embora não tenha evitado seu reaparecimento. Considera-se que a espera pelo avanço do ES até 50% do comprimento não foi a melhor escolha como critério de operacional.Palavras-chave: colmatação, tratamento de águas residuárias.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

<b>Effect of reversal of the flow direction on hydrodynamic characteristics and plants cultivated in constructed wetland systems

2016

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“…The system formed by the filtering substrate, the adhered biofilm and the plants, favors the degradation of part of the organic matter in the solution, the removal of sediment and suspended solids, of nutrients and other contaminants, through physical, chemical and biological processes, providing the debugging of wastewater (Prata et al, 2013). The removal efficiencies of the CWs depend on the choice of the type of liquid inlet and outlet configurations, feed rate, applied loads, environmental conditions, type of substrate, and the plant species used (Kantawanichkul & Wannasri, 2013;Wang et al, 2014a).…”

Section: Introductionmentioning

confidence: 99%

Influence of Substrate and Species Arrangement of Cultivated Grasses on the Efficiency of Horizontal Subsurface Flow Constructed Wetlands

Saraiva

Matos

et al. 2018

Eng. Agríc.

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We aimed to evaluate the efficiency of six different horizontal subsurface flow constructed wetlands (HSSF-CWs), with different substrates (gravel and crushed PET bottles), which also varied in relation to the presence and arrangement of plant species (elephant grass and Tifton 85 bermudagrass) in the removal of pollutants from a bulk milk cooling tank (MTWW). Each bed was fed at a flow rate of 0.18 m 3 d -1 and average organic load rate (OLR) of 318 kg ha -1 d -1 of BOD5, with hydraulic detention time (HRT) of 1.84 days in the gravel-filled HSSF-CWs (CWS-G) and 2.97 days in the PET-filled HSSF-CWs (CWs-P). The CWs-P were as efficient as the CWs-G in the removal of BOD5, COD, Total-P, and K-Total, being in some cases even more effective (turbidity, TS, TSS and Na). The gravel, on the other hand, provided greater removals of Total-N from the MTWW. In the non-cultivated CWs and those cultivated with elephant grass, in its first half and Tifton 85 grass in its second half, there were higher average efficiencies in COD and TSS removal sand, in the latter, the highest average removal of Total-N.

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“…In contrast to conventional sewage treatment technologies, HSSF-CW present simple and efficient treatment mechanisms, as well as few maintenance and operation requirements (FIA et al, 2010;NIVALA et al, 2012;PRATA et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Hydraulic Conductivity Variability in Horizontal Subsurface Flow Constructed Wetlands

et al. 2017

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Many modifications in hydrodynamic conditions occur inside the bed of a horizontal subsurface flow constructed wetland (HSSF-CW) in operation. Studies on hydraulic conductivity measurement techniques in HSSF-CW are imperative since the monitoring of flow conditions is essential for understanding and controlling its clogging. This study aimed to assess the hydrodynamic behavior in HSSF-CW by means of saturated hydraulic conductivity (Ks) analysis. For this, six HSSF-CW were used: two non-cultivated (control), two cultivated with Tifton 85 (Cynodon spp.), and two cultivated with alligator weed (Alternanthera philoxeroides). Application of swine wastewater (SW) in HSSF-CW started on June 15, 2011, with Ks measurement period between September 9 and November 11, 2011, in which five measurements were performed in different positions along the system length and over experimental period in order to assess the effects of vegetation, position, and time factors on this variable. Ks values ranged from 1,392 to 2,834 m d −1 . Plant presence led to Ks decreasing in the systems, but cultivated species had no influence on this variable. Monitoring time of HSSF-CW was no longer enough to provide a reduction in Ks, at 10% probability level.

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Tratamento de esgoto sanitário em sistemas alagados construídos cultivados com lírio-amarelo

Cited by 20 publications

References 21 publications

<b>Effect of reversal of the flow direction on hydrodynamic characteristics and plants cultivated in constructed wetland systems

<b>Effect of reversal of the flow direction on hydrodynamic characteristics and plants cultivated in constructed wetland systems

Influence of Substrate and Species Arrangement of Cultivated Grasses on the Efficiency of Horizontal Subsurface Flow Constructed Wetlands

Hydraulic Conductivity Variability in Horizontal Subsurface Flow Constructed Wetlands

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