The Research On The Treatment And Recycle Of Active Carbon Wastewater From Active Carbon Production

A large amount of wastewate is discharged from the production proceed of active carbon, which can bring about environmental pollution if not disposed. The water pollution is severe in our country. And we also have strong resource shortage. So the thesis is mainly about the Research on the Treatment and Recycle of Active Carbon Wastewater from the active carbon production. From the concept of cleaner production, it makes efforts to reduce the amount of wastes and utilizes the wastes comprehensively. The technological process of the paper concludes the steps as follows: separate and recover the active carbon in the wastewater, remove the ferrous iron, the hardness and the chloride in the wastewater. By use of the micro filtration membrane, the active carbon is separated from the wastewater effectively and the separating effectiveness reaches 99% above. The removal of ferrous iron and harness will achieve by neutralization and precipitation. After treatment, the concentration of total iron ions is below 0.3mgIL, and the concentration of hardness is below 450mg/L. Through the electrodialysis, the concentration of chlorides is below 250mg/L. After the treatment, the wastewater not only meet the discharged wastewater standard, but also can be reused to wash the road, the playground of workshops and so on, or reused in the production proceed of active carbon. The economic analysis in the paper finds that it will get more than 400,000 yuan per year if the factory recycle the active carbon in the wastewater and reuse the wastewater in different ways. The research on the treatment and recycle of active carbon wastewater finds a new possible way to dispose and recycle the wastewater effectively.