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Avaliação de uma estação de tratamento de esgoto doméstico por escoamento superficial
| Content Provider | Semantic Scholar |
|---|---|
| Author | Fonseca, Sandra Parreiras Pereira |
| Copyright Year | 2007 |
| Abstract | The objective of the present work was to evaluate the performance of a sewage treatment unit (ETE), constituted of sand box, equalization tank, septic tank and overland flow system, under the edafoclimatic conditions of Vicosa, MG, implanted in a Dystrudepts, with a clayey-sandy texture. The plant area was land leveled in four plans, each one with three borders of 1 m width, 25 m length with 2% of slope, and cultivated with Tifton 85 grass bermudagrass (Cynodon spp.). The application rate of 0,48 m3.h-1.m-1 was applied for ten hours a day and six day a week, during six months of operation. The samples of sewage collected along the borders, at every 2 meters up to 18 meters, were submitted to physical, chemical and coliforms analyses and after six months physical and chemical analyses were carried out in the soil and vegetation samples. The sewage pH tended to increase along the border, and the CE, the DBO, DQO, N-total, P-total and K+ concentrations tended to decrease. The Na concentration tended to remain constant along the border. The amounts of dry matter (DM), crude protein (CP), N, P and K of the grass Tifton 85 green matter tended to decrease along the length of the border. In the 0-10 cm layer of the soil there was an increase in the pH, CEes, OM, N-total, P-available, and the concentrations of K and Na exchangeable, however, with the sewage application, the increase was less along of the border. In the 50-60 cm layer the OM and N-total in the soil remained constant. The pH, CEes, P-available, Na and K tended to decrease along the border in the 50-60 cm layer. The exchangeable Na and K increased in the soil profile. The total and fecal coliforms - E. coli population remain practically constant along the border. These microorganisms are not recommended for the monitoring of ETE by disposal on the soil. The EPA model proposed in 1984 represented well the removal of the DBO and DQO, however the coefficients K and K differed from those observed by other authors under different edafoclimatic conditions, kind of effluent treated and application rates.%%%%O objetivo do presente trabalho foi avaliar o desempenho da unidade de tratamento de esgoto domestico (ETE), constituida por desarenador, tanque de equalizacao, tanque septico e tratamento secundario por disposicao no solo pelo metodo do escoamento superficial nas condicoes edafoclimaticas do municipio de Vicosa, MG, implantada em um CAMBISSOLO Haplico Tb distrofico latossolico, textura argilo-arenosa. Foram implantados quatro planos de sistematizacao, cada um com tres faixas de 1 m de largura, 25 m de comprimento e declividade de 2%, cultivadas com o capim Tifton 85 bermudagrass (Cynodon spp.). Foi aplicada a taxa de 0,48 m3.h-1.m-1 por um periodo de dez horas e frequencia de seis dias por semana, durante seis meses de operacao. Foram coletadas amostras do esgoto a cada 2 m do inicio da faixa ate atingir 18 metros, 10 minutos apos a chegada do afluente ao ponto de coleta, duas vezes por semana, as quais foram submetidas as analises fisicas, quimicas e de contagem… |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://www.locus.ufv.br/bitstream/handle/123456789/788/texto%20completo.pdf?isAllowed=y&sequence=1 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
