UV-applications
Advanced Oxidation Processes (AOP)
Cyanomat® - the modern way to eliminate Cyanide
Keeping CN-limits by means of UV-oxidation without sodium hypochlorite!
Rosenberger put the first Cyanomat reactor into operation in 1999; today there are a total of seven reactors.
The modern cyanide decontamination for wastewater treatment was developed by the company a.c.k. aqua concept GmbH between 1997 and 1998 and is carried out in a multi-stage UV oxidation process. This modern waste water treatment process was awarded the 1999 Environmental Prize in Berlin.
The wastewater treatment process is based, on the one hand, on a UV reactor for UV oxidation that was completely newly developed at the time and, on the other hand, on additional process engineering and process stages that supplement the UV process in the wastewater and exploit the elimination of the cyanide.
Over the years, a.c.k. aqua concept GmbH and, from 01.01.2013, enviolet GmbH have been able to implement a large number of successful projects for the removal of cyanide from process media and wastewater, with the industrial property rights remaining with a.c.k. aqua concept GmbH.
Cyanide-containing wastewater and cyanide concentrates from all applications (surface technology, synthesis, etc.) with up to 150,000 mg/L CN- can be completely oxidised and detoxified using this UV oxidation process.
The detoxification or degradation of cyanide in wastewater is carried out fully automatically, quickly and safely in UV oxidation reactors. When disposing of wastewater and concentrates using UV-H2O2, no chlorine bleach (sodium hypochlorite) is used, therefore no AOX is produced in the wastewater.
Thanks to the innovative process control in the advanced UV process, all relevant limit values for free cyanide and total cyanide in the wastewater are complied with in accordance with the respective legal requirements.
UV oxidation for cyanide degradation - Examples of systems for treatment of small and large volumes
Treatment of groundwater, rinsing water and concentrates
Typical applications:
- Surface technology (treatment of rinsing waters and concentrates)
- Chemical industry
- Groundwater remediation
Theory:
See our chapter on Cyanide Oxidation Basics for more information on cyanide degradation using an AOP process, including information on:
- Chemistry of the reaction
- Advantages over a treatment with sodium hypochlorite
- Application examples
- References
Publications, case studies and other references can be found in the section "Treatment of Chelate Wastewater in Plating and PCB-Industry" in our publication list.
Common objectives:
- Cyanide degradation to comply with relevant limits
- Cyanide degradation + ensuring reliable precipitation of dissolved heavy metals (usually in surface technology)
As part of the AOP process, COD and nitrite are also oxidized / eliminated (if present).
In order to best advise you in such applications based on a well-founded design basis, we offer individualized feasibility studies, which form the basis for our design of your system in this area.
