Tri-CelŪ Wastewater Treatment Systems.
Full retention separators fully treat all flows, for the area served. The full flow is normally equivalent to the flow generated by a rainfall intensity of 6.5mm per hour. They are used in areas, where there is a risk of regular contamination with oil and a foreseeable risk of significant spillages such as petrol stations etc. In the event of a spillage, it is important to consider the flow rate of the liquid to the separator as the oil storage capacity needs to be sufficient to retain the entire spillage.
On large sites, some short-term storage upstream of the separator might be an acceptable means of limiting the rate of flow and the size of separator required. Any surface water stored cannot be pumped through the separator unless the separator is specifically designed to receive pumped inflows and a low-sheer, non-emulsifying pump is needed.