Background

Water pollution occurs when harmful substances contaminate waterways, degrading water quality and rendering it toxic to humans or the environment.

The presence of colour in discharge water is often caused by dissolved organics and tannins which are created during the tea manufacturing process. This colouration effects not only the aesthetic appearance of the water, but when this wastewater is discharged to nature, photosynthesis activity becomes limited, which has detrimental effects on aquatic ecosystems.

Moreover, releasing untreated wastewater into the ecosystem can result in:

  • Bioaccumulation of chemicals in the food chain
  • Population decreases in aquatic species

The Solution

Arvia’s Nyex™ 7-100-a system was deployed against this application. This process combines adsorption with electrochemical oxidation in a single, scalable unit. Organic contamination is preferentially adsorbed, localising it onto the surface of the carbon-based Nyex™ media. A low electrical current is then passed through the media bed which fully mineralises the adsorbed contaminants to H₂O, H₂ and CO₂. The electrical current simultaneously regenerates the surface of the media in-situ, allowing for further adsorption and treatment without interruption or incineration.

Results are achieved without chemical dosing or the generation of sludge reducing costs in terms of labour, transport of chemicals and specialist waste disposal.