Hello!!
I am currently working as an engineer at a nickel smelter.
Recently, the composition of the coal used in rotary kilns has changed, which has started to change the composition of the wastewater.
The wastewater treatment facility uses an electrolysis facility and is mainly used to reduce ammonia nitrogen, cyanide, TOC(Total organic carbon), etc.
The anode of the electrolysis facility uses a ruthenium coating on the titanium electrode, and the cathode uses titanium.
As the composition of coal changed, ammonia nitrogen and cyanide began to increase.
Therefore, we are looking into various ways to install additional facilities.
The questions are as follows:
1. When passing through an electrolysis facility, the concentration of cyanide increases. I am curious as to why. Currently, the concentration of cyanide is measured at 1 ppm before electrolysis, but after passing through the electrolysis facility, it is measured to be 5 to 6 ppm.
2. I would like to know how effective the RO(reverse osmosis) method is in removing TOC, ammonia nitrogen, and cyanide.
If you are familiar with wastewater treatment facilities, please respond.
thank you
During electrolysis, the electric field strengthens mass transfer and promotes the diffusion of cyanide ions adsorbed on the surface of tailings into a solution. Chlorine feed, retention, and filtration will break down the cyanide. Reverse osmosis or electro dialysis will remove 90 - 95% of it. The result increase due to what electrolyte are using during the experiments. The cyanide degradation is performing in an electrochemical reactor (with anode of reticulated vitreous carbon and cathodes of graphite) with three compartments separated by a polymeric membrane. supporting electrolytic media (NaOH, NaCl, NaNO3and Na2SO4), can be applied potentials.RO is very effective for treatment of cyanide waste. However Granular activated carbon (GAC) absorbs cyanide, but can result in relatively high costs for both the GAC itself and its spent disposal.
Wastewater treatment facilities often use a combination of methods to clean and recycle water. Electrolysis and reverse osmosis are two such methods, each with its own specific applications and benefits. Here are some common questions and answers about these technologies in the context of wastewater treatment.