Main Features
- The system is modular, and its capacity can start from lab-scale levels of few litters and up to high production levels of hundreds and thousands of cubic meters per day.
- System size is small and typically occupies a few standard containers
- Operational costs are relatively low especially for inorganic or complex wastewater compositions.
- Fast deployment does not require civil works and long permission processes
- The system requires a minimum of supporting services and maintenance
- System connections mainly include influent, effluent and electricity inputs and outputs.
Benefits:
- Ammonium concentration can be reduced to practically approach zero, and its level in the effluent can be guaranteed.
- Operational cost is defined by removed amount of ammonium, electricity cost and process efficiency. Purammon has achieved very high efficiency levels for complex wastewater composition scenarios.
- The electro-chemical reactor design and process control ensure the specificity of the desired reactions to ammonium (or other target pollutants).
Purammon’s physico-chemical treatment is robust, stable, reliable, and predictable and can be implemented within a short time within a limited space. It does not engage living organisms and does not require civil engineering works. It is suitable for a variety of wastewater capacities and compositions, in existing treatment plants as well as for new plants.
Purammon’s systems can
- Guarantee effluent ammonium and nitrogen levels;
- Reduce the load on existing reactors;
- Expand plant capacity for BOD treatment without further investment;
- Treat high or low ammonia concentrations.
- Transform and eliminate ammonia in the effluents.
- Targeted processes eliminate other pollutants such as nitrate, TOC, COD and heavy metals.
Purammon’s solution is simple to implement, has a small footprint, produces no sludge and can be turned-on and turned-off upon demand.
The Process
Purammon’s innovative technology comprise electrochemical cells that convert ammonium into inert nitrogen gas. The nitrogen can then be discharged safely to the atmosphere (nitrogen comprises approximately 78% of the atmosphere and is harmless).
Advantages:
- It is realized through a relatively simple and easy to maintain system
- Operation is totally automatic and stable.
- Ammonium is converted to nitrogen gas in one step (two stages are required in the common processes of nitrification/denitrification).
- The process minimizes concentration fluctuation related problems that often lead to oversized design (i.e. the system is relatively easy to adjust to changes in ammonia concentration)
- The system can therefore expand the WWTP capacity and reduce related expenses of dismantling and rebuilding larger reactors.
- It is stable and reliable
- Physico-chemical processes, have an immediate start-up, and can operate at times when electricity is cheaper (e.g. at night time)
- No sludge production.
Purammon’s solution is based on a combination of subsystems designed and put together according to the target wastewater composition.
A typical system includes:
- Ion exchange columns and adsorption material
- Electrochemical reactors
- Storage tanks
- Process controller and software
General System Diagram
In the ION exchange phase, the pollutant is separated from the wastewater. This process works in a batch mode where every cycle starts with adsorption and finishes with regeneration. The resulting eluate goes to the second phase of treatment which decomposes the ammonium and transforms it into nitrogen gas. Ammonium treatment repeats in a closed cycle. The selected process and structure of the system depends on the initial ammonium concentration (or other pollutants) and target wastewater composition.