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| Orssatto,Fábio; Vilas Boas,Marcio A.; Nagamine,Ricardo; Uribe-Opazo,Miguel A.. |
| The current study used statistical methods of quality control to evaluate the performance of a sewage treatment station. The concerned station is located in Cascavel city, Paraná State. The evaluated parameters were hydrogenionic potential, settleable solids, total suspended solids, chemical oxygen demand and biochemical oxygen demand in five days. Statistical analysis was performed through Shewhart control charts and process capability ratio. According to Shewhart charts, only the BOD(5.20) variable was under statistical control. Through capability ratios, we observed that except for pH the sewage treatment station is not capable to produce effluents under characteristics that fulfill specifications or standard launching required by environmental... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: STS; Sewage; Process Capability; Shewhart Control Chart. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162014000400016 |
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| Hermes,Eliane; Rocha,Dayane C. da; Orssatto,Fábio; Lucas,Juliana F.R.; Gomes,Simone D.; Sene,Luciane. |
| The aim of this study was to isolate microorganisms that produce lipase and to assess the efficiency of COD removal intreatment of cheese whey under different operating conditions. The microorganisms were isolated from cheese whey and a commercial product; it was selectedthreemicroorganisms that obtained the best response to the lipolytic activity test through the enzyme index. Then, the microorganisms were inoculated in sterilized cheese whey samples, for two pH values (6.2 and 7.0), incubated at 35 °C and 150 rpm in shaker and the lipolityc activity and the efficiency of COD removal were measured in two time periods (24 and 48h). After incubation, it was observed that the treatments showed a good removal efficiency of COD for the pre-treatment and the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Waste treatment; Dairy industry; Lipases. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162013000200016 |
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