NATIONAL DRINKING WATER CLEARINGHOUSE PAGE OF FOUR Using ultraviolet (UV) light for drinking water disinfection dates back to 1916 in the U.S. Over theyears, UV costs have declined as researchers develop and use new UV methods to disinfect waterand wastewater.ATIONAL DRINKING WATER CLEARINGHOUSE PAGE OF FOUR Using ultraviolet (UV) light for drinking water disinfection dates back to 1916 in the U.S. Over theyears, UV costs have declined as researchers develop and use new UV methods to disinfect waterand wastewater.
Dulce de leche (pronounced DOOL-se de LE-che, meaning candy of milk or milk jelly in Spanish) is a rich and decadent sauce or syrup, similar in flavor to caramel.Unlike caramel, however, which is made by heating sugar, dulce de leche is prepared by heating sweetened condensed milk.Dulce de leche is especially common in the desserts of various South American countries, including Argentina and Uruguay. The can may burst. 2  Even though this is a popular way to make dulce de leche, it is unsafe and not recommended. 3  Do not overcook the dulce de leche, especially if you use the saucepan method, because it will burn easily.
Like caramel, it can also be prepared as a sauce simply by cooking it a little less. The classic recipe for dulce de leche is to boil a can of sweetened condensed milk for hours until the contents form a dark brown, thick fluid.Technically, dulce de leche is a type of caramel.) It's often used in liquid form as a sauce for ice cream, cakes, cookies, just about anything that needs a sweet topping. In solid form, it is most often eaten as a tasty candy.