Gelatin is widely used, but the wastewater produced by gelatin production is difficult to handle.

Gelatin is mainly produced by alkali method, which produces a large amount of waste water in the production process, and has the characteristics of high alkali, high calcium, high chlorine and high COD, complicated water quality and large water volume.

Because of the characteristics of gelatin wastewater, the treatment of this wastewater must first destroy the stability of the water. The suspended particles and colloidal particles in the wastewater are very light, and the collision is caused by the collision of molecular thermal motion to make irregular Brownian motion. At the same time, the colloid has a charge, and the same kind of colloids have the same electric charge, forming a repulsive force with each other, and cannot be close to each other to form a large particle sinking. .

Based on years of practice, the Noel Group has concluded a practical approach. Coagulation destabilization, flocculation sedimentation method.

Coagulants are mainly polyaluminum chloride and sulfates. The metal ion hydrolysis and polymerization process occurs when a coagulant is added during the water treatment coagulation process. At this time, the colloidal particles in the water can strongly adsorb the products of hydrolysis and polymerization. The adsorbed positively charged multi-nuclear complex ions can compress the electric double layer, lower the potential, reduce the repulsion between the colloids, and achieve the purpose of particle destabilization. The flocculant is mainly PAM. PAM is an organic polymer flocculant, which mainly adsorbs colloidal particles onto the molecular chain by adsorption bridging to form large flocs.