Assessment of oil-interceptor performance for solid removal in highway runoff

ABSTRACT

Oil interceptors are traditional SuDS devices used in highway runoff treatment to remove both floatable impurities (leaves, oil) and total suspended solids (TSS). This paper presents the results of an examination of the performance of an oil interceptor based on particle size distribution (PSD) and TSS during three rainfall events. The interceptor is situated on one of the busiest motorways in the UK (where peak traffic flow is 30,000 vehicles per hour). Although the overall data collected for this study provided evidence that the interceptor removed, in most cases, 70% of TSS, the data for particle size distribution (PSD) showed that the interceptor did not always cope with particle separation for particles of less than 25 μm diameter.

GRAPHICAL ABSTRACT

KEYWORDS:

• ADWP
• highway runoff
• oil interceptor
• particle size distribution
• SuDS

Acknowledgements

The authors thank Mr Geoff Russell and Mrs Jayshree Bhuptani for their assistance with laboratory and field support. The authors also recognise the fact that that without the support provided by Mr David Chapman, Mr Dhan Tagie and Mr Dmitry Zakharov the publication of this paper would not have been possible.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Data availability statement

Data available on request from the authors.

Additional information

Funding

This research was supported by Loughborough University and partially supported by SUE ‘Vodokanal of St. Petersburg’.