What is the difference between drinking water grade poly aluminum and sewage grade poly aluminum? What is the difference between drinking water grade poly aluminum and sewage grade poly aluminum? Polyaluminum chloride and polyferric sulfate represent the coagulation of aluminum salt and iron salt, respectively, of the wastewater treatment coagulant. Its various wastewater, such as printing and dyeing wastewater, papermaking wastewater and various plating circuit boards, chemical wastewater organic pollutants have a very good removal effect, but because of the wastewater treatment enterprises is the efflux. If the need for reclaimed water after the wastewater treatment, or direct treatment of drinking water, you need to use drinking-grade aluminum and poly-iron, and their sewage level What are the differences? Difference between drinking water grade polyaluminum and polluted water polyaluminum: 1. Difference in appearance: Take Polyaluminum chloride as an example, the polluted polyaluminum will make its color darker because it contains a certain amount of ferric ion, which is yellowish brown and brown Brown, content is lower. Drinking water level poly aluminum must be fully up to the national standard, may not contain any heavy metal impurities, the color is also bright was beige, the need for its production of raw materials and processes caused by the different. 2, the content of high purity: drinking water level of polymeric aluminum or polymeric ferric sulfate relative to the purity of the sewage level is higher, less impurities, water-soluble products of drinking water less than 0.3%, while the sewage treatment level is about 2% The basic grade of drinking water products is relatively low, the stability is better. 3, accreditation testing: Drinking water level Poly aluminum because of its treatment effect is directly related to the health of urban drinking water resources, so after production must pass through the state wading hygiene permits, put to handle drinking water. Sewage levels do not need this card. 4, the treatment effect is different: Drinking water level of polyaluminum chloride and polyferric sulfate due to its high content, so its adapted to the PH value in the wastewater in a wide range of hydrolysis speed, strong absorption, flocculation and settling effect is good, the use of More extensive treatment of salt water increased less conducive to ion exchange treatment and high purity water. After the treatment, no aluminum ions or iron ions remain in the water, and a certain amount of aluminum ions or iron ions remain after the sewage-level treatment.