The treatment method of gelatin wastewater

Gelatin is widely used, but wastewater from gelatin production still needs to be treated.

According to the gelatin production method, we know that gelatin is mainly produced by alkali method, which produces a large amount of Water Treatment Chemicals in the production process, and the wastewater is high in alkali, high in calcium, high in chlorine, high in COD characteristics, complex water quality and large amount of water.

 

Because gelatin wastewater has such characteristics, the treatment of this wastewater must first destroy the stability of the water body. The suspended particles and colloidal particles in the wastewater are very light, subject to the collision of molecular thermal motion to do irregular Brownian motion, while the colloid has a charge, similar colloid has the same charge, forming a repulsion between each other, can not be close to each other to form large particles sinking.

 

Based on years of practice, Henan Hongze Environmental Protection Technology Co. summed up a set of practical treatment methods. Coagulation destabilization, flocculation sedimentation method.

Coagulants are mainly polyaluminum chloride and Polymerized Ferrous Sulfate. Metal ion hydrolysis and polymerization will occur when coagulant is added in the water treatment coagulation process. At this time, colloidal particles in water can strongly adsorb the products of hydrolysis and polymerization. The positively charged polynuclear complex ions adsorbed can compress the double layer, reduce the potential, and reduce the intercolloid repulsion, so as to achieve the purpose of particle instability. The flocculant is mainly polyacrylamide, polyacrylamide is an organic polymer flocculant, mainly through adsorption bridging the colloidal particles adsorbed to the molecular chain to form a large flocculant.

Therefore, flocculant polyacrylamide plays an important role in the treatment of wastewater.