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In-sewer biodegradation study at the Costa do Estoril interceptor system

2000; Elsevier BV; Volume: 2; Issue: 4 Linguagem: Inglês

10.1016/s1462-0758(00)00064-9

1878-5670

Maria do Céu Almeida, David Butler, José Saldanha Matos,

Water Quality Monitoring and Analysis

Understanding and quantifying the transformations of wastewater during transport in sewers is an important prerequisite to engineering and improving the performance of the integrated urban wastewater system. This paper describes experiments, which were carried out in a Portuguese interceptor sewer to quantify changes in different water quality determinands as a result of the combined activity of suspended and attached biomass. The focus is on dry weather flows under aerobic conditions. The highest reduction was found for dissolved COD, which includes an important fraction of easily biodegradable matter. The results are not directly applicable to other systems but indicate the range of values that can be expected under similar conditions.