Use water flotation to remove the grit (small rocks) from sesame seeds.
I have been piqued that even high quality sesame seeds contain grit. Theres the disconcerting crunch between my teeth, when eating food made from these sesame seeds. You dont want to wear out your teeth, chewing rocks! A cracked tooth can cost thousands of dollars to repair. Who needs that?
Cleaning seeds and other agricultural products is a challenge. The only practical way, on commercial scale, is to make use of some difference in properties between the contaminant and the desired material. For seeds, this is typically some combination of sieving and air-blowing.
When you cook a batch of dry beans, you occasionally find a rock or clump of dirt masquerading as one of the beans. it got through the threshing because it was about the same size and weight as a bean. Beans are big enough you can spot the rocks, and pick them out. But sesame seeds are too small.
After trying this a couple of times, I came up with a way, and decided to post this. Here, I use the difference in density. Sesame seeds are oily, and therefore mostly float in water or at least stay suspended. The grit sinks.
Sesame seeds seem to have a life of their own. They are light and slippery, and yet at the same time like to stick to everything. Pouring and spooning them, some always get out and make a mess. So I thought ahead. I was going to have a mass of wet sesame seeds I would need to dry. And dry fairly fast, to prevent mold.
I have a dehydrator. The setup for drying the seeds is one of the dehydrator trays, and a clean bandana.
The bandana goes on top of the tray screen. It serves as a strainer to hold the sesame seeds, while letting water go through. But the cloth is bigger than the tray. The edges would be in the way, when slid into the dehydrator.
So the edges of the cloth are tucked behind the tray screen.
The time to get this ready is at the start, before fumbling with a mass of wet sesame seeds.
Next, the sesame seeds. I did about a 3-cup batch.
I added water to make 4 cups, and stirred a bit.
Then I just poured out the floating sesame seeds on the cloth. I also included the sesame seeds that were not clearly floating but only suspended in the water.
The grit stays on the bottom.
I spread out the wet sesame seeds and got them drying. The lowest temperature setting is enough, about 90°F.
The next part is optional, if you want to prove the grit is in that residue. It just looks like more sesame seeds.
I put the remainder on some metal that could take the heat, in this case, a juice can lid.
I set up to burn out the remaining organic matter.
After the water boiled away, the seed oil caught fire.
This last part takes a lot of propane, so you might not want to waste the fuel. The charcoal bits have to be red-hot.
The carbon slowly oxidizes away.
You will get efficient and thoughtful service from QinLi.
When the carbon is gone, there are the tell-tale rocks.
Sure enough, they are about the size and color of sesame seeds.
Meanwhile, the wet sesame seeds are drying. The bandana makes it easy to put them away with minimal mess.
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Sesame seeds have a golden brown color and is an important recipe for a leafy green salad or flavorful stir fry. sesame seeds are a staple in Japan and have a unique and intense taste compared with peeled seeds.unhulled sesame seeds are popular with natural food enthusiasts in the United States, they have a special crunchier texture than hulled sesame seeds and with a slightly bitter taste.
After harvest, sesame seeds always mix with some tiny stones, dust, or other impurities, which make it difficult to cook with sesame seeds, for they are so small in size, and light in weight! Now with the development of technology, we have researched and produced equipment for cleaning and drying sesame seeds, if you are interested in it, please continue to read.
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