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The methods for determining the suspended matter in the sewage include a membrane filtration method, a filter paper filtration method, a centrifugal separation method, a weighing method (calculation method), and a qualitative dispersion analysis method.
General principle of determination: Pour the sample into the filter or filter paper instrument after drying, filter the filter or filter paper, put it into the oven, and dry it at 40~50 °C and 150 °C. The heavy rule does not need to be filtered, and a certain volume of the sample can be directly dried. When a constant weight is reached, the weight is measured. With a membrane or filter paper is then placed in suspension in the temperature control of the white gold or ceramic crucible 600 ℃ of burning when it reaches a constant weight and then measuring the weight loss. Finally, the mass of the suspended solids, the residue after burning and the amount of loss after burning were calculated in mg/L.
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