PCB plant wastewater treatment analysis of the reasons for the high copper ions? PCB plant wastewater treatment analysis of the reasons for the high copper ions? Lin, a client recently encountered a problem in Yunnan, PCB wastewater copper ion treatment is very high, about 3ppm, before about 1ppm or less, the other normal. It is mainly treated with composite poly-iron + polyaluminum chloride, and heavy metal collector, PAM and defoaming agent are added properly in the process. Now basically no change in influent quality with the previous, that is, a lot of surfactant foam, and the sludge condition is not very good, it is difficult to achieve solid-liquid separation in the enrichment tank, the top liquid is still relatively turbid (previously clear of). Is it because of the problem of adding medicine? Feel that the current use of pharmaceutical has no previous effect, or is there any other reason? Through the filter source of water purification engineering and technology department further analysis of the following results: The current plant used in pharmaceutical, polyaluminum chloride, polyiron, heavy metals capture agent, defoamers, polyacrylamide. Among them, inorganic substances such as polyaluminum chloride and polyiron are unlikely to have any problems with the two agents. The biggest possibility is that the content is low and the impurities are large, but the dosage can still reach the coagulation effect. Organic matter defoamers, polyacrylamide, heavy metal trapping agent, the first role of defoamers is to eliminate the large amount of foam generated by the surfactant, the foam can still be eliminated during use. Then there is no possibility of quality problems defoamers. The use of polyacrylamide is likely to use the problem is not well done. Sludge conditions are not good, may be related to the coagulation conditions, such as polyaluminum chloride, poly iron dosage, pH precipitation range. It is recommended that the filter plant guide the production line through the small test dosage and pH control conditions, and finally to the heavy metal trapping agent problems, which is in line with the copper ion in the water increased phenomenon, confirmed from the side of this. Then the quality of heavy metal trapping agent is how to affect the concentration of solid-liquid separation pool it, far-fetched because there are heavy metal residues in the concentrated pool, the precipitation of some of the heavy metals formed after the precipitation of hydroxides, resulting in the supernatant Become cloudy. This information by the filter source technology group research release, for transfer, please indicate the future.