standard measurement method of sludge moisture content:

preparation of filter paper

take a certain amount of filter paper, move it into an oven, dry it at 13-15℃ for half an hour, then take it out and cool it to room temperature in a dryer, and weigh it. Repeatedly drying, cooling and weighing until the weight difference between the two weighing is less than or equal to ≤.2mg, and recording (W1). Put the constant weight filter paper in the balance tray.

sample and weigh about 2g of the upper and lower sludge, and write down the weight W2 after reaching a constant weight, then the sludge weight W=W2-W1, dry it in an oven at 15 degrees for about 2 hours, put it in a dryer for 3 minutes, cool it to room temperature, then weigh it, write down the data, and weigh it again after drying for 2 hours, until the weighed weight remains unchanged, which is called reaching a constant weight W3 (or the weight difference between the two times is less than or equal to) Moisture weight =W2- W3. Moisture weight /W*1%= moisture content.