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Zhengzhou Vidar Water Industrial Co.Ltd.
Head Office: No.32, Agri-Tech Road, Zhengzhou.
P.R. 45000

How to getting rid of copper by poly ferric sulfate


The poly ferric sulfate has the process and principle in getting rid of copper
Use Poly Ferric Sulfate -PFS as a flocculant, combine lime and sodium sulfide in wastewater applied to the addition of copper to the effect is very good, except for copper what role PFS play in the reaction ? The answer is that PFS should be a coagulant , lime regulate PH value .
In order to improve efficiency and control the water treatment PH,our company dosing sequence of the segment were adjusted as follows: water → rapid mixing tank ( plus ferrous sulfate , plus lime ) → PH adjustment tank ( before adding sulfuric acid ferrous , plus sulfide ) → slow mixing tank ( plus pam) → → sedimentation tank effluent . Adjust the dosing sequence , the principle of treatment is the use of lime precipitation Cu2 +, PFS as flocculants, sodium sulfide plays a major role in breaking contact , polyacrylamide flocculant , and by adjusting the "PH adjustment tank " PFS dosage the size of the effluent PH control in 9 or less. After adjusting for the use of flow process , saving the subsequent addition of an acid neutralization tank effluent PH adjustment link, save the use of sulfuric acid , and the treatment effect is diminished.
Poly ferric sulfate on board wastewater network in addition to breaking the principle of copper methods:
Poly ferric sulfate theoretically break contact to copper under acidic conditions (PH = 3) using ferric sulfate substitution that Cu2 + liberated from the EDTA-Cu , EDTA-Fe except generated ; then liberated by the addition of Cu2 + base generate Cu (OH) 2 precipitation, thereby reducing the water out of copper ions. The original section of the integrated treatment process of the sewage treatment station : water → rapid mixing tank ( plus ferrous sulfate ) → PH adjustment tank ( before adding lime , plus sulfide ) → slow mixing tank ( plus PAM) → sedimentation tank → neutralization tank ( sulfuric acid ) → water . Adjusting pool water PH ≈ 3.5-4.5, another recent sedimentation tank often have tiny suspended solids wafting phenomenon is not resolved , because there is a problem and the use of drug usage , you can do some small scale .


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