| Journal: | Engenharia sanitaria e ambiental |
| Database: | PERIÓDICA |
| System number: | 000275352 |
| ISSN: | 1413-4152 |
| Authors: | Mascarenhas, Luciana Curi Araujo1 Sperling, Marcos von1 Chernicharo, Carlos Augusto de Lemos |
| Institutions: | 1Universidade Federal de Minas Gerais, Departamento de Engenharia Sanitaria e Ambiental, Belo Horizonte, Minas Gerais. Brasil |
| Year: | 2004 |
| Season: | Ene-Mar |
| Volumen: | 9 |
| Number: | 1 |
| Pages: | 45-54 |
| Country: | Brasil |
| Language: | Portugués |
| Document type: | Artículo |
| Approach: | Experimental, analítico |
| English abstract | This study aims to evaluate the performance of two shallow polishing ponds, operated in series, treating domestic sewage from an upflow anaerobic sludge blanket reactor. The research was carried out for six months, in Nova Vista Wastewater Treatment Plant, in Itabira, MG, Brazil. The shallow polishing ponds (H=0,40m) were highly efficient, despite the short total retention time in the system (about 6 days), leading to a final effluent with average concentrations of 30 mg BOD/L; 1,83 x102 MPN E.coli /100mL; 0,19 helminth eggs/ L and 2,0 mg N-NH4/L. The accumulation of sludge at the bottom of the ponds was evaluated after six months, and a high average viability (76 to 86%) of Ascaris lumbricoides eggs was detected, which should be an alert for the adequate management of this sludge in case of agricultural reuse |
| Portuguese abstract | O presente trabalho avaliou o desempenho de duas lagoas de polimento rasas (H=0,6 e 0,4m), em série, tratando efluentes de um reator UASB. Os dados foram levantados durante seis meses, em unidades de tratamento de esgotos, em escala de demonstração, em Itabira/MG. As lagoas apresentaram um excelente desempenho, principalmente quando operaram mais rasas (H=0,40m) e, apesar do baixo TDH total no sistema (cerca de 6 dias), produziram um efluente final com concentração média de 30 mg/L de DBO; 1,83 x102 NMP/100mL de E.coli; 0,19 ovos de helmintos/L e 2,0 mg/l de amônia. O lodo acumulado no fundo das lagoas, após seis meses de funcionamento, apresentou uma elevada porcentagem (76 a 86%) de ovos viáveis de Ascaris lumbricoides, o que serve de alerta para o correto manejo e reúso deste tipo de lodo na agricultura |
| Disciplines: | Ingeniería |
| Keyword: | Ingeniería ambiental, Tratamiento de aguas, Aguas residuales, Reactores, Infraestructura, Plantas de tratamiento |
| Keyword: | Engineering, Environmental engineering, Water treatment, Waste water, Reactors, Infrastructure, Treatment plants |
| Full text: | Texto completo (Ver PDF) |
