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In restaurant wastewater pollutants exist in colloidal form
- Nov 25, 2016 -

In restaurant wastewater pollutants exist in colloidal form. Gel itself has a lot of surface free energy, has a greater adsorption capacity, and lang, characteristic of the movement, which has more chance of collisions between particles, it seems you can glue together synthesis of large particle, then by gravity and sink.

However, due to colloidal particles with similar electric charges of the same sex, electrostatic repulsion between them to prevent particles approach each other and larger granule; Secondly, a charged colloidal particle and counter ion hydration with the surrounding water molecules, forming a layer of hydration shell, as well as the aggregation of colloidal particles.

After the addition of aluminum salts and other inorganic salts, metal ion hydrolysis occurred polyreaction process, polynuclear complex by adsorption of positively charged ions are capable of compressing double layer, reducing the Zeta potential, can reduce the maximum exclusion between the colloidal particles, allowing colloidal destabilization. While using inorganic flocculant, organic polymers are often used as flocculant. A good bridging and adsorption of polymeric flocculants, and inorganic flocculants use can speed up the reaction rate, improve the effect of treatment. Tests have shown that:

First: basic aluminum chloride, aluminum sulfate, chloride, ferrous sulphate, potassium sulfate, potassium aluminum sulfate + 6 polyacrylamide flocculants to restaurant wastewater with flocculation effect is better.

Second: potassium sulfate polyacrylamide flocculant + dining CODcr of wastewater and turbidity can be significantly reduced. CODcr removal rate can reach 83%, turbidity can be reached 80%.