Chromium, a heavy metal, is a steel-gray, corrosion-resistant and hard metal. Many people may not have heard of this “type” of chromium, but with the continuous development of industry, chromium, like other compounds, is being consumed more and more widely. At this point, it also leads to excessive chromium content, thereby posing a certain threat to the ecological environment and human health. May I ask which industry the heavy metal chromium in sewage mainly comes from?

Chromium compounds are mainly present in the wastewater discharge of industries such as electroplating, aluminum anodizing treatment, dye manufacturing, paint eye manufacturing and some other metal cleaning. In addition, chromium can also be used as a fire retardant and fireproof agent for wood. However, due to the differences in industries, the way chromium exists can also vary. For instance, chromium exists in water in the form of hexavalent and trivalent ions. As for industrial wastewater, it mainly exists in the hexavalent form.

For wastewater containing chromium, the treatment method is to first reduce hexavalent chromium to trivalent chromium, and then make the trivalent chromium form hydroxide precipitates and remove them. If it is some high-concentration chromium-containing wastewater, evaporating and recovering it is a kind of high-concentration organic wastewater and is a relatively practical method. In addition, the ion exchange method can also be adopted. This method can reduce the concentration of chromium-containing wastewater discharge to a relatively low level.

The above briefly introduced the sources of heavy metal chromium in sewage and the issue of how to treat it. To ensure the safe discharge or recycling of sewage, how could the “T8000-Cr Total Chromium Online Analyzer” be indispensable at this time? In simple terms, it means doing a good job in online water quality monitoring to see if all the indicators in the water have met the standards. Only after confirming that it is safe can it be used or discharged.