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Are there specific types of waste waters where this technology is best suited?Low and trace concentrations of organics and non-biodegradable organics.
What is the scalability of the technology?Electrochemical technologies are very scalable because you can just increase the number of cells.
What is the maximum amount of COD ppm which can be treated?There is no limit to the maximum concentration that can be treated. As the COD concentration increases, the amount of energy required for adsorbent regeneration increases.The process is most cost effective for low concentrations of organics.
Is there a minimum and maximum flow rate?No
What is the effect of salt/ high salinity on the process?Increased salt will increase the conductivity of the water giving a slight reduction in the operating voltage of the system, reducing processing cost. Arvia has tested systems up to 15% sodium chloride.
NyexAn engineered graphite with a graphene-like surface which adsorbs pollutants. Nyex is a patented product of Arvia Technology.
Arvia Organics Destruction CellA water treatment unit housing Arvia’s patented technology which adsorbs and oxidizes organics.
AdsorptionThe adhesion of particles to a surface. In the Arvia Organics Destruction Cell pollutants in water are adsorbed onto the surface of Nyex.
Organic pollutantsSubstances which contain carbon. Some can be hard to remove from wastewater and some are highly toxic.
Pesticides are seen in sources of drinking water from agricultural run-off. Of particular concern is the presence of atrazine and metaldehyde. Regulatory limits for pesticides are 0.01 μg/L for any individual pesticide and 0.05 μɡ/L in total. These are not readily removed through conventional treatment.
Endocrine Disrupting Compounds
Endocrine disruptors (estrone (E1) and 17β-estradiol (E2)) contain natural oestrogens which have an effect on the hormones in the endocrine system. These have been found extensively in the environment and have shown to have an effect on aquatic life. The treatment of most endocrine disruptors in municipal waste water treatment facilities have been ineffective at reaching acceptable levels for discharge to the environment.
Synthetic Chemical Dyes
Synthetic chemical dyes are used within many industrial processes, such as pulp and paper manufacturing, plastics and textiles production, and leather treatment. Some dyes are not only toxic, but also recalcitrant to microbial degradation. Hence. their presence in industrial effluent is of environmental concern. Moreover, during anaerobic degradation dyes can form potentially harmful carcinogenic compounds that can end up in the food chain. The difficulty in dye-treatment is further complicated by their ability to interfere with municipal waste water treatment facilities e.g. UV disinfection. Their complex aromatic structure makes dyes resistant to light, biological activity and Ozone, which is why they are not readily removed by typical waste treatment processes.
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