How to effectively treat the waste liquid generated during the production of PRINTED PAPER CARDS to reduce pollution to the environment?

When treating the waste liquid generated during the production of PRINTED PAPER CARDS, we can take a series of measures to reduce pollution to the environment. Here are some suggestions:
First, it is very important to pre-treat the waste liquid. This includes removing larger suspended particles in the waste liquid through screens and sedimentation tanks, and adjusting the water quality and water volume of the waste liquid through regulating tanks to keep it relatively stable and prepare for subsequent treatment units. Next, physical treatment methods can be effectively applied to the treatment of waste liquid. For example, coagulation sedimentation method aggregates fine particles in the waste liquid into large flocs by adding flocculants and coagulants, and then separates them by sedimentation. In addition, flotation is also an effective option, which uses tiny bubbles to adhere to pollutants and float them to the water surface, thereby removing ink particles and some soluble organic matter. Chemical treatment methods also play an important role in waste liquid treatment. Redox method uses oxidants or reductants to decompose organic matter, or treats difficult-to-degrade organic matter through advanced oxidation technology. The chelation precipitation method is applicable to wastewater containing heavy metal ions. By adding chelating agents, insoluble chelates are formed, which are then precipitated and separated.
In addition to physical and chemical methods, biological treatment is also an option worth considering. Biological treatment uses microorganisms to degrade organic matter in wastewater, and has the advantages of high treatment efficiency, low cost, and environmental friendliness.
Comprehensive treatment is also an effective treatment method. It combines multiple treatment methods to achieve higher treatment efficiency and better treatment effects. For example, biological-physical-chemical comprehensive treatment and biological-chemical comprehensive treatment are both commonly used comprehensive treatment methods.
Finally, the treated wastewater should be strictly tested and evaluated to ensure that it meets the emission standards and avoids adverse effects on the environment and ecosystem.
Therefore, through the effective combination of pretreatment, physical treatment, chemical treatment, biological treatment, and comprehensive treatment, we can effectively treat the wastewater generated during the production of PRINTED PAPER CARDS, thereby reducing pollution to the environment.