to get a complimentary download version - (FKM), Verträge und ...

Hygienic design of floor drainage components 43Figure 2. Geocellular storage systems provide efcientunderground capacity to manage ood risk to the building and tomeet local volume discharge consents.Internal oor drainageIt is well recognised that drainage is an essential componentof effective hygienic operation. Global initiatives such as theGlobal Food Safety Initiative (GFSI 2012) and EuropeanEconomic Community legislation (EC 852) highlight therequirement for adequate drainage. Further denitionscan be sourced from the various European standardsas referenced in this article, as well as local building orconstruction regulations.Within the food production facility, surface uids present ahazard for which an appropriate risk assessment strategycan be devised. Fluids may be part of the cleaning process,or may originate from specic equipment discharge points,or be simply the result of accidental spillage. Quite oftenthe uid contains other components – organic matter beingprevalent. Floor drainage components cater for thesesituations through three core functionsInterceptionConveyanceBarrier capabilityFigure 3. Fluid interception and conveyance illustrated on the left ina slot linear channel, and localised point interception is shown onthe right through a tundish connected to a oor gully.Conveyance relates to uid movement or transport. Whileuid conveyance across oors should be minimised it isclear that linear channels exhibit good conveyance attributeswith the benet of generally keeping the drainage inverthigher than with a pure gully system. This is especially so inlarger areas. This attribute is also useful in drainage retrotschemes, where construction depths might be minimisedwith subsequently less disruption. Gullies on the other hand,convey only to the ongoing drain pipe.The ability to create a barrier that prevents uid bypassmay be important at specic locations, such as doorways.As such, drainage layout may be part of the wider schemeof segregation or zoning within the facility as illustrated inFigure 4.The main categories of oor drainage, gullies and linearchannels, differ in their performance of these functions.The property of interception can be related to the efciencyof surface uid removal, a function equally inuenced by thesource Point discharges can be most efciently interceptedby a gully, often with a tundish or funnel component on thecover or grate to minimise splashing. In cases in which largevolumes of uid discharge over a wider area, wide channelsystems provide interception along their length and preventbypass. Examples of both are shown in Figure 3.Figure 4. A common position for oor drainage.