|
|
|
|
|
| Baptestini,Gheila C. F.; Matos,Antonio T.; Martinez,Mauro A.; Borges,Alisson C.; Matos,Mateus P.. |
| ABSTRACT 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... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hydrodynamic conditions; Clogging; Constructed wetlands; Wastewater treatment. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000200333 |
| |
|
|
| Saraiva,Claudety B.; Matos,Antonio T.; Matos,Mateus P.; Miranda,Suymara T.. |
| ABSTRACT 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 m3 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,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Wastewater; Elephant grass; Tifton 85 bermudagrass; Plants; Porosity. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000300417 |
| |
|
|
| Matos,Mateus P.; Sperling,Marcos V.; Matos,Antonio T.; Passos,Ricardo G.. |
| RESUMO A colmatação é um fenômeno intrínseco aos sistemas alagados construídos (SACs) utilizados no tratamento de esgotos, sendo decorrente dos mecanismos de remoção de poluentes. Dentre os métodos disponíveis para a avaliação da colmatação, destaca-se o uso de traçadores para a obtenção das condições hidrodinâmicas dos SACs. No entanto, não há um traçador ideal; os salinos, por exemplo, são passíveis de absorção, mecanismo influenciado pelo estádio no qual a planta se apresenta. Assim, objetivou-se, com a realização do trabalho, avaliar a utilização do NaCl para caracterização do grau de colmatação e das condições hidrodinâmicas de SACs de escoamento horizontal subsuperficial, plantado e não plantado, verificar a confiabilidade do uso desse traçador em... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cloreto de sódio; Eficiência volumétrica; Esgotos; Obstrução; Plantas; Wetlands construídos. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162015000601137 |
| |
|
|
| Miranda,Suymara T.; Matos,Antonio T.; Matos,Mateus P.; Borges,Alisson C.; Baptestin,Gheila C. F.. |
| ABSTRACT This study aimed to characterize the material composition responsible for clogging the porous medium of horizontal subsurface flow constructed wetland (HSSF–CW) systems, which is detrimental to a proper system operation. Six completely clogged HSSF–CWs were used after treatment of swine wastewater. Operating conditions of these systems were named CW–C (HSSF– CW 1 and HSSF–CW 4, non-cultivated, i.e. controls), CW–T (HSSF–CW 2 and HSSF–CW 5, cultivated with Tifton 85 (Cynodon spp.)), and CW–A (HSSF–CW 3 and HSSF–CW 6, cultivated with alligator weed (Alternanthera philoxeroides)). The results showed that most of the clogging material was composed of total fixed solids (95, 84, and 82% in CW–C, CW–T, and CW–A, respectively). However, total volatile... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Constructed wetlands; Clogging; Porous medium. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000300463 |
| |
|
|
|
