Preparation method of compound coagulant

Abstract

The invention relates to a preparation method of a compound coagulant. The compound coagulant is prepared by commonly mixing polysilic aluminum ferric chloride, diallydimethylammonium chloride (the viscosity is 8,000-12,000), magnesium sulfate and deionized water according to the mass ratio of 30 percent, 2 percent, 5 percent, and 62 percent. The invention has the advantages of removing heavy metals and organisms in an organic complex by multiple actions, having the effect of decolorization, wide medicine effect range and simple and convenient operation and replacing a plurality of coagulantsfor use.

Description

Technical field [0001] The invention relates to a composite coagulant for removing heavy metals and organics in a waste water treatment system and has a good removal effect on the complex, in particular to a preparation method of the composite coagulant. Background technique [0002] With the continuous development of new wastewater treatment technologies and wastewater reuse technologies, the application of coagulants in water treatment has become more and more extensive, and the continuous complexity and deterioration of wastewater sources put forward higher requirements for the normal operation of existing treatment systems. Requirements, and with the national water quality discharge standards, the non-compliance of the water treatment system's effluent has also become the largest obstacle to its operation. How to reduce and remove heavy metals and organics in wastewater has become the most concerned research direction in the industry. . Existing coagulants must work in a spe...

AI Technical Summary

Problems solved by technology

Existing coagulants must be effective in specific environments, especially when removing heavy metal ions, appropriate coagulants and coagulants must be used within the pH range of heavy metal ion precipitation. Higher requirements are imposed, and the degree of treatment is limited, which cannot meet the requirements under the condition that the discharge water quality is gradually improving.

Therefore, many people can increase the use of organic decolorizers, heavy metal scavenger, COD adsorbents, etc. at this time. However, due to the high price of such agents, obvious technological monopoly, and complicated varieties and uses; It is better to choose a compound formula that can achieve the same effect and a lower price medicament