Treatment of Municipal Sewage and Industrial Sewage

The treatment of municipal sewage and industrial sewage is currently mainly divided into two types according to the source of sewage: municipal sewage and industrial sewage. In the treatment of these two types of wastewater, the more commonly used treatment method is to add polyacrylamide.

Municipal sewage: refers to the sewage discharged into the urban sewage system. Municipal sewage also includes domestic sewage and industrial sewage. When polyacrylamide is selected as a flocculant for municipal sewage, cationic polyacrylamide is usually used. Depending on the water quality, A sewage analysis experiment must be done to determine the specific model.

Industrial wastewater is mainly divided into: organic wastewater containing mainly organic pollutants, inorganic wastewater containing inorganic pollutants, mixed wastewater containing both organic and inorganic substances, wastewater containing radioactive substances and cooling water only contaminated by heat, and Heavy metal wastewater.

The selection of polyacrylamide is mainly based on the different types of charges carried by the sewage water quality. According to the characteristics of the water quality, cationic polyacrylamide, anionic polyacrylamide, nonionic polyacrylamide, etc. are selected, and the product model is selected through experiments.

Pay attention to the use of polyacrylamide in sludge dehydration. There are many types of polyacrylamide, so the selection of the type is more important, because it is an important factor affecting the effect, and then it is the problem of the operation process after the selection. Operational Problems of Polyacrylamide Used in Sludge Dewatering 1. Water pressure problem, sometimes due to insufficient water supply pressure, the dissolution funnel of the material feeder cannot send the polyacrylamide agent into the preparation pool, resulting in blockage. The solution is to use a water pump to increase the water pressure. 2. The sludge dehydration polyacrylamide solution is recommended to be prepared and used immediately to prevent it from being left for too long and may affect the treatment effect. 3. When the container is cleaned, it should be cleaned in all aspects, so that the impurities sticking to the wall of the drum can be better cleaned up, and the drum can be given a balanced speed. 4. Regularly adjust the operating frequency of the dehydrator. When the dehydrator vibrates violently, it should be prohibited to feed again immediately, and the next step should be dredged first. 5. The concentration of sewage sludge is relatively high during water purification. At this time, it is best to let the sewage stand for a period of time, and then extract the clean solution above to increase the concentration of sludge for treatment.

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