Sewage treatment problems caused by solar cells and solutions to the problems Sewage treatment problems caused by solar cells and solutions to the problem Methods A sewage station in Shandong recently received a project that deals mainly with the production of solar cells for sewage treatment, Water treatment station staff for this type of water quality less contact with the processing encountered several problems I do not know how to proceed, so I call to consult the factory, the following filter source Xiaobian to the water station site staff Understand the problems and Xiaobian given the solution. Problems: 1. Sewage treatment of solar cells (the wastewater contains sodium hydroxide or hydrofluoric acid, sometimes alkaline or acidic). When the pH is adjusted to neutral, add PAC to the sewage, Add more into a yellow, then whether the color to identify the dosage is appropriate? 2.PAC if Canada will have any effect? 3.PAM if added more will have any effect? Solution: In fact, if the wastewater contains only sodium hydroxide or hydrofluoric acid, when PAC is added, colloidal aluminum hydroxide is formed under alkaline conditions, and chloride ions or a small amount of aluminum fluoride is present under acidic conditions, and these Neither substance is green or yellow. In fact, the color to determine PAC dosage is inaccurate (alum is close to colorless), it is recommended to observe the size of alum to judge, or through the cup bottle test to determine the best dosage, on-line fine-tuning. The impact of PAC plus more is to waste agents, reducing the alkalinity of water bodies. PAM plus will lead to alum filaments, and a waste of medicine, the general dosage of a cubic waste water recommended about 3 grams of dry powder. This information is a source of original filter water, for reprint please indicate the source URL: http://www.gyzhenyu.com