Statistical modelling of Fat, Oil and Grease (FOG) deposits in wastewater pump sumps

Statistical modelling of Fat, Oil and Grease (FOG) deposits in wastewater pump sumps

Nieuwenhuis, E.M. (TU Delft Sanitary Engineering)
Post, J.A.B. (Partners4UrbanWater)
Duinmeijer, S.P.A. (TU Delft Sanitary Engineering)
Langeveld, J.G. (TU Delft Sanitary Engineering; Partners4UrbanWater)
Clemens, F.H.L.R. (TU Delft Sanitary Engineering; Deltares)

2018-05-15

The accumulation of FOG (Fat, Oil and Grease) deposits in sewer pumping stations results in an increase in maintenance costs, malfunctioning of pumps and, a potential increase of wastewater spills in receiving open water bodies. It is thought that a variety of parameters (e.g. geometry of the pump sump, pump operation, socioeconomic parameters of the catchment) influences the built-up of FOG. Based on a database containing data of 126 pumping stations located in five Dutch municipalities a statistical model was built. It is shown that 3 parameters are most significant in explaining the occurrence of FOG deposits: mean income of the population in a catchment, the amount of energy (kinetic and potential) per m³ per day and the density of restaurants, bars and hotels in a catchment. Further it is shown that there are significant differences between municipalities that can be traced back to the local ‘design paradigm’. For example, in Amsterdam, the design philosophy of discharging in the pump sump under the water surface (and hence maintaining a low level of turbulence in the pump sump) results in an increase of the probability of the formation of FOG.

Fat Oil and Grease (FOG) deposits
Generalized linear mixed modelling
Pumping station
Sewer system

http://resolver.tudelft.nl/uuid:f8a4ff13-2e24-442d-9479-30ccf641a55e

https://doi.org/10.1016/j.watres.2018.02.026

0043-1354

Water Research, 135, 155-167

Institutional Repository

journal article

© 2018 E.M. Nieuwenhuis, J.A.B. Post, S.P.A. Duinmeijer, J.G. Langeveld, F.H.L.R. Clemens