Pre-treatment of trade waste ensures discharged wastewater meets local Water Authority requirements, and prevents contaminants that can harm public health and the environment from entering our wastewater system. The purpose of pre-treatment is to protect raw water recovery and more generally remove anything that could hamper subsequent treatment processes. Depending on the quality of the water to be treated, several processes could be required, including;
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Use our sizing calculator to discover which Halgan S series is the best size for your business.
For each fixture, enter in the quantity you have and flow rate where required. Make sure you have the manufacture's guide handy for these. Once you've gone through the list of fixtures, you'll see a total of litres per hour which correlates to the size of the passive grease treatment you need.
|Fixture||Flow Rate (L/h)||Quantity||Subtotal (L/h)|
|Dishwasher – small (under bench)|
|Dishwasher – medium (upright)|
|Dishwasher - tunnel feed||Use manufacturer’s peak flow rate per hour x 3|
|Dishwasher - large (>1 outlet)||Use manufacturer’s peak flow rate per hour x 3|
|Glass washing machine|
|Glass washer - tunnel feed||Use manufacturer’s peak flow rate per hour x 3|
|Sink - utility / pot per outlet connected separately to drain (depth greater than 300mm)|
|Sink – single bowl (depth up to and including 300mm)|
|Sink – double bowl (depth up to and including 300mm fixture pair connection)|
|Tundish - condensate (refrigerator / freezer condensate)|
|Tundish - other (except refrigerator condensate)|
|Grease canopy (water cleaned)|
|Steamer roast oven / Combi oven||1000 L or 3000 L grease arrestor minimum size for high use combi ovens (i.e. supermarkets, fast food chains).|
|-- Number of racks|
|Electric or gas /steamer cooker / kettle|
|Ice cream machine soft serve|
|Potato peeler (small kitchen application)|
|Bain Marie - water heated||Use maximum capacity of the apparatus x 3|
|Bin wash||No Arrestor Required|
|Floor waste / bucket trap / grated strip drain||50 L/hr for every 50m2 of floor area, or part thereof. Add allowance for any listed connected apparatus|
|Sealed floor waste gully|
|Wok burner –dry||30L per water arm|
|Wok burner –wet||Use manufacturer’s peak flow rate per hour x 3|
|TOTAL LITRES PER HOUR|
*Sizing is calculated using QUU sizing guidelines
Total Litres per hour: