2. Use of cationic polyacrylamide
Sludge dewatering: the corresponding brand of this product can be selected according to the nature of the sewage, which can effectively carry out gravity sludge dewatering before the sludge enters the pressure filtration. During dehydration, large flocs will be produced, and the filter cloth will not stick, and it will not flow when filtering. The amount of water used is small, and the dehydration efficiency is high. The moisture content of the mud cake is below 80%.
Treatment of sewage and organic wastewater: This product is cationic in acidic or alkaline media, so it is extremely effective to flocculate and precipitate the wastewater with negative charge of suspended particles in the sewage, and clarify it, such as wastewater from alcohol factory, brewery, monosodium glutamate factory, sugar factory, meat and food factory, beverage factory, textile printing and dyeing factory, etc. The use of cationic polyacrylamide is better than the use of anionic polyacrylamide, The effect of non-ionic polyacrylamide or inorganic salt is several times or tens of times higher, because this kind of waste water generally has negative charge.
Flocculant for water treatment in waterworks: This product has the characteristics of low dosage, good effect and low cost. The farewell is that it is better to use it in combination with inorganic flocculant.
Oilfield chemicals: such as clay anti-swelling agent, thickener for oilfield acidification, etc.
Paper additive: Cationic PAM paper reinforcing agent is a water-soluble cationic polymer containing carbamoyl, which has the functions of strengthening, retention and drainage, and can effectively improve the strength of paper. At the same time, the product is also a highly effective dispersant.
3. Use of anionic polyacrylamide
Industrial wastewater treatment: For the suspended particles, the effluent with high concentration, positive charge and neutral or alkaline PH value of water, the effluent from iron and steel plant, electroplating plant, metallurgical wastewater, coal washing wastewater and other sewage treatment, the best effect.
Drinking water treatment: The water source of many waterworks in China comes from rivers, with high sediment and mineral content and relatively turbid. Although it is still unable to meet the requirements after sedimentation and filtration, it is necessary to add flocculant, the dosage is 1/50 of inorganic flocculant, but the effect is several times of inorganic flocculant. For rivers with serious organic pollution, inorganic flocculant and cationic polyacrylamide can be used together to achieve better effect.
Recovery of lost starch distiller's grains from starch factories and alcohol factories: At present, the wastewater from many starch factories contains a lot of starch. Now, anionic polyacrylamide is added to flocculate and precipitate the starch particles, and then the precipitate is filtered by pressure filter to become cake, which can be used as feed. Alcohol from alcohol factories can also be dehydrated by anionic polyacrylamide and recycled by pressure filter.
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