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 polyaluminium chloride, diallydimethylammonium chloride (the viscosity is 8,000-12,000), magnesium sulfate, polyferric chloride and deionized water according to the mass ratio of 30 percent, 2 percent, 5 percent, 1 percent and 62 percent. The invention has the advantages ofremoving 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 coagulants for use.

Description

technical field [0001] The invention relates to a composite coagulant for removing heavy metals and organic matter in a waste water treatment system and has a good removal effect on complexes, 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, coagulants are more and more widely used in water treatment, and the continuous complexity and deterioration of wastewater sources put forward higher requirements for the normal operation of existing treatment systems. , and with the improvement of national water quality discharge standards, the substandard effluent of the water treatment system has become the first major obstacle to its operation. How to reduce and remove heavy metals and organic substances in wastewater has become the most concerned research direction in the industry. These pollutants are mainly treated by traditiona...

AI Technical Summary

Problems solved by technology

These pollutants are mainly treated by traditional medicaments by adjusting ph, redox and other methods, so that the heavy metals and organic substances in the wastewater can be separated from the water, but the removal effect of these medicaments is poor, the function is single, and the efficacy is low. It does not have the effect of completely removing all kinds of substances; it can be helped by introducing coagulants and coagulants later. The existing coagulation aids (polyaluminum chloride, polyaluminum ferric chloride, etc.) In the face of difficult-to-handle complexes, the demand cannot be met, and the color of the effluent water is higher when the iron salt coagulant is used, and the alum flower formed by the aluminum salt coagulant is relatively loose