Factors Affecting the Performance of Primary Treatment in Onsite Systems

D'Amato, Victor

doi:10.2166/9781780403700

Cited by 1 publication

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“…Accordingly, the organic matter removal efficiencies on platform are close to the upper range of available literature data. The test on platform is too short to establish a state of equilibrium, which entails the two processes of physical sedimentation and water enrichment by anaerobic biological solubilization of organic matter (D'Amato et al 2008).…”

Section: Additional Analysis Adapted To the Various Families Of Productsmentioning

confidence: 99%

Prediction of household wastewater treatment systems' in situ performance based on standardized tests

Falipou

Favre

Lacasse

et al. 2022

Water Science and Technology

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This paper presents a comparative analysis on operating conditions of onsite wastewater treatment systems. Actual EU Member States' national regulations require in situ treatment thresholds expressed in effluent concentrations. CE marking of onsite wastewater treatment system is mandatory according to standardized test (EN 12566-3 + A2) with performance declared in removal efficiency. Recent study indicates that in situ raw sewage concentrations are 1.5 times higher than those on test platforms. In this context, performance comparison between platform tests and in situ discharge threshold cannot be based on effluent concentrations but rather on removal efficiency to fulfill environmental and health requirements. This study compares: (i) results from eight standardized tests, (ii) over 300 measurements of in situ raw sewage, and (iii) several national-level thresholds focusing on carbon parameters. To meet French effluent thresholds, a minimum removal efficiency of 96% in SS and 95% in BOD5 is required. A beta law model assesses the efficiency measured during standardized testing and establishes a robustness characteristic with a probability above 80%. When a septic tank is used, its efficiency can be incorporated into the prediction. Although the new performance criteria are more stringent, some of the eight products evaluated still meet the requirements.

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Section: Additional Analysis Adapted To the Various Families Of Productsmentioning

confidence: 99%