Vanadium ion concentration in sewage treatment rises instead of falling
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Our company's sewage treatment mainly removes vanadium. In the past few days, the abnormal vanadium concentration was around 9ppm (less than standard 2, feeding around 30). During this period, the sewage treatment was allowed to circulate on its own (normal dosing, no sewage entering). Vanadium ions have increased from 9 to 30. Please help to find out the reason. The process of adding NaOH is controlled at 10, and adding FeCl3 to flocculation around 9. PAM assists coagulation. Now the feed is normal. Increase the feed amount of FeCl3. The pH is around 8.5. Vanadium still cannot be lowered. Please help.
Vanadium ions exist in many forms. It depends on whether your vanadium ions are cations or anions. If it is vanadate, it is not clear whether your method will be effective. If the concentration is this, you can try our ion exchange resin, which can definitely reach 1ppm. Contact me if necessary.
Whether the sampling is uniform and whether the detection is accurate
This post was last written by qxx* Edited by aoao on 2019-9-5 13:43 The leach solution in the sodium vanadium extraction process contains a large amount of chloride ions. The chloride ion concentration has a great impact on the adsorption efficiency, so the leach solution cannot be recycled and a large amount of wastewater is produced that is difficult to treat. Our company’s new vanadium extraction technology has the following advantages:: 1. It is not a sodium process, the leach solution contains almost no chloride ions, and the leach solution can be recycled after separation without producing waste water. 2. Since this new technology contains almost no chlorine, and there is no chlorine in the roasting flue gas, there is no need to use sodium hydroxide spray to remove chlorine, which can save a lot of flue gas treatment costs. 3. The comprehensive recovery rate of vanadium is as high as 85%, which is 15% to 20% higher than that of the ordinary sodium method. Due to the low cost of wastewater and flue gas treatment and the high comprehensive recovery rate of vanadium, the production cost of vanadium pentoxide has been significantly reduced. Welcome to the site for detailed consultation