When using polyacrylamide to treat wastewater with high COD content, the following points need to be noted:
1.Accurately grasp the concentration and proportion of polyacrylamide: polyacrylamide is a solid particle, which needs to be dissolved into an aqueous solution with a concentration of 1 -5 before use, and gradually added to water to ensure uniform dissolution in a suspension with high concentration and high viscosity. Different water quality conditions require different concentrations and ratios, and the most suitable concentration can be determined through experiments.
2.Avoid the ingress of iron ions: The presence of iron ions can affect the treatment effect of polyacrylamide, so it is important to prevent iron ions from entering the treatment system. When adding polyacrylamide, contact with iron ions should be avoided, or iron removal should be carried out before addition.
3.Control the dosage: Excessive use of polyacrylamide may lead to an increase in COD, so pay attention to the dosage during use and adjust the dosage according to the specific water quality conditions.
4.Control the pH value of the treatment system: When treating wastewater with high COD content, the pH value of the treatment system will change due to chemical reactions, and the pH value needs to be properly controlled to ensure the treatment effect.
5.Timely measures need to be taken to treat wastewater COD exceeding the standard: if the COD of wastewater still exceeds the standard after polyacrylamide treatment, it is necessary to change the treatment method or add other treatment agents in time to ensure the treatment effect.
6.Strengthen wastewater treatment and management: When dealing with the problem of excessive COD in wastewater, it is also necessary to strengthen wastewater treatment and management, reduce discharge, and protect the environment and human health.