Vancouver, BC and parts of Quebec
Although most areas in Canada now recognize the problems associated with aggressive floor cleaners, Vancouver (GVRD), most of BC, and parts of Quebec continue to stipulate that mop sinks and floor drains must pass through grease interceptors
In these jurisdictions in-ground grease passive type traps have to be installed if low-level mop sinks and floor drains are present in the commercial kitchen. The recognized sizing method for passive traps is by measuring the volume of each sink and appliance and adding these together to get a maximum possible flow rate assuming all these drain simultaneously and completely empty out within a specified time limit, usually 1 minute.
By using this method the calculated flow rate capacity can easily be in excess of 250 gpm and this is the size of in-ground trap now required. Vancouver has recently commenced a program of inspections to the effect of requiring existing kitchens bring their grease traps up to the mandated sizing standards. The cost of installing very large traps or replacing or upsizing from previously accepted trap sizes to achieve these requirements can be extremely expensive and in some cases space cannot be found at the location of the existing trap and so the under floor drainage has also to be dug up and re-routed. The resulting disruption to business can be disastrous for a kitchen operator
Goslyn™ in Retrofits
In a retrofit or replacement of a “rot out” a far more economical and less disruptive alternative is to keep or replace (with like) the existing in-ground trap to take the mop sinks and floor drains (and prep sinks if so mandated). A Goslyn™ fully automatic grease interceptor is then installed to take the effluent from the pot sinks, pre-rinse sinks and the dishwasher as these produce the highest FOG load and use the “small” in ground trap to collect the mop sinks and floor drains. The drain line from the Goslyn™ is taken directly to the sewer. Because Goslyn™ are extremely efficient they may be sized by means of the Goslyn™ sizing method
Goslyn™ in New Builds
A very large capacity in-ground trap is expensive to buy and install. It is always hard to find floor space for the footprint of a large trap within the kitchen area and even if it can be sited outdoors (landlords approvals, etc.) the at risk drain lengths from the kitchen to the outdoor trap vastly increases the risk of blockages from “setting-up” FOG
The combination of Goslyn™ together with a small in ground trap satisfies the demand to “catch-all” but, because most of the FOG is being collected by the Goslyn™ the load on the in-ground trap is so reduced that clean outs may be less frequent requiring mostly to remove collected sludge especially when the floor cleaning chemicals carry any FOG stripped from the floor through the trap as an emulsion thus negating the use of the trap
Benefits to both operator and City.
The use of Goslyn™ is a win–win situation for the kitchen operator and for the city waste-water department, while complying with Environmental issues as well.
The kitchen operator is less at risk from disruption caused by sewer line back-ups and is able to meet the discharge limits for FOG.
The city wastewater department has less maintenance costs for sewer lines, lift pump stations and sewer plant screens. A further advantage is that because the recovered FOG may be sold to the local oil recycling company it has value and is thus follows a self-regulating disposal route, as opposed to the need to legislate and check up on the correct disposal of hazardous pump out materials that have negative cost and environmental impacts.
Both the restaurant operator and the City benefit from this arrangement.
Goslyn™ also helps towards a “no stink” working environment in the kitchen and less health potential issues.