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Spill containment is where spills of chemicals, oils, sewage etc. are contained within a barrier or drainage system rather than being absorbed at the surface. One method is to use an inflatable stopper or pneumatic bladder which is inserted into the outflow of a drainage system to create a containment vessel.
Secondary spill containment is the containment of hazardous liquids in order to prevent pollution of soil and water. Common techniques include the use of spill berms to contain oil -filled equipment, fuel tanks , truck washing decks, or any other places or items that may leak hazardous liquids.
Portable water purification devices are self-contained, easily transported units used to purify water from untreated sources (such as rivers, lakes, and wells) for drinking purposes. Their main function is to eliminate pathogens , and often also suspended solids and some unpalatable or toxic compounds .
With suitable development, support and effective partnerships, some believe that container-based sanitation can be scaled up to provide more low-income urban populations with safe sanitation. Costs for containment, collection, transport and treatment of excreta are expected to be lower than the cost of sewers and water treatment plants. [2]
Secondary containment is a back-up strategy sometimes used to mitigate potential failure of the primary container. The typical profile of a vessel with secondary containment is a primary vessel with an exterior vessel shell encompassing the primary vessel with at least 100% capacity.
The effectiveness of a skimmer deployed in open water or oil spill recovery is highly dependent on the roughness of the surrounding water that it is working on: the more choppy the surrounding wake and water, the more water the oil skimmer will take in along with the oil, rather than take in oil alone.
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