This foam is water-soluble protein released from the peas and it will be absorbed back into the cooking liquid. When turning on the water in the sink (either hot or cold), the first ¼ cup or so would be very foamy, much more than just what the aerator screen normally provides. Each time i boiled the water for 10 minutes with the lid on. When the water was completely vaporised, a white substance was left behind on the bottom of the pot. I took it out, but I want to know what it is. The water supply is clean and clear but when it is boiled or cooked, a white oily layer floats on top of the water. I was boiling down water in a stainless steel pot as an experiment the other day. Most likely you have hard water that is forming temporary foam. When peas boil, a foam forms on the top of the cooking liquid. You must live in a hard water area. When the water is left cooled, the white layer hardens and sticks on the wall of the pot and container. This leads to a build-up of pressure, forming air bubbles in your water that are released when the tap is run. The foam coming from the eggs is nothing to be concerned about. Each time i boil the water there is this white fluffy looking stuff in it. Every time you throw a stack of uncooked pastas into a pot of boiling water, there's an unmistakable froth that appears. The white foam is called Calcium Carbonate (CaCO3), more commonly called Limescale. Nothin can fall into the pot of water so i dont know where its comming from. Is it the potassium? Its not harmful, but the soapy nature tends to accumulate microscopic dust etc that may have been sticking to the dals hardlikearmour April 5, 2012 However, pot of water that is boiling will have temporary foam as gasses form bubbles that stay at the surface. Sounds strange, but it’s actually pretty simple. Usually, if I did not consume all the water in the kettle and the water was cold, I usually topup extra water to the kettle and turn it on to boil. I'm sure there just fine. So, after many weeks of boiling in this way, I notice that there are white powder outside the kettle. The customer claims that a sand filter has been used to filter the water but the white layer still appear. Foam often is seen in our brown-water streams in the spring as snowmelt carries DOC to adjacent streams and lakes or during fall rain storms after the leaves have fallen and begun to decompose. I used 3 different pots, all had the same problem. In addition to causing foam, DOC provides energy and performs many additional functions important to aquatic ecosystems. You could turn on full cold, get the foam, then turn to full hot and get a second short blast of foam. Have you ever wondered what the foamy gunk that arises in your water … The foam is denatured protein from the lentils. White water can be caused by excessive trapped air in your water pipes or main supply. … “The water that you soak canned or dry beans and other pulses in is called aquafaba. I don't know. I used my water kettle (metal ones, not the plastic ones) to boil my water. Why does it form this foam? I am currently boiling three Russet potatoes which I diced into squares, and foam is forming at the top of the boiling water. I tried rubbing it off the bottom, but it would not come off. It is not necessary to remove the foam. he trapped air dissolves in the water but when you run a tap, built-up pressure is released and air bubbles are formed, which give your water its white appearance. It looks like dust in water. It's kind of an off yellow color, almost white, but not quite. Sometimes this happens when I cook eggs in a hurry, and I don't salt the water. I used distilled spring water i got at wal-mart. This also occurs when cooking beans. 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