WASTEWATER TREATMENT SYSTEM FOR PAPER INDUSTRY

1. General description

- With the waste water composition with a high cellulose content, it is necessary to have a well-trained wastewater treatment process to treat it well!

- To produce 1 ton of pulp we have to discharge 2 to 3 tons of waste into the environment and 200 to 500 m3 of wastewater

?Processing process

- Pretreatment: Separating garbage, sand from the common sewer system by a fixed system of trash racks, mechanics and trash separator system, separating sediment and floating substances.

- Mechanical treatment:

??+ Neutralizes the pH of wastewater

??+ The flocculant separates the ice deposits by gravity deposition or flotation

- Biological treatment: It is necessary to go through 2 stages: anaerobic treatment and aerobic treatment to remove BOD, COD and bring organic pollution criteria to the permitted standard level.

- Finishing: Ensure the criteria specified in the standard before discharging wastewater into receiving sources outside the environment. Including stages: secondary clearing, sterilization, etc

Commonly used chemicals for paper wastewater treatment system include:

polyacrylamide (PAM)

decolorizing agent Powder activated carbon

polyaluminium chloride (PAC)