Laundry water comprises a substantial volume of domestic water consumption. Nearly 60 L of freshwater is used per washing cycle in European countries while in North America and South Korea it is more than 140 L. The total annual water consumption per washing machine varies from about 10 m3 in the European countries to 62.4 m3 in Japan, which can account for 5.1% to 18.4% of the total annual water consumption per household.
Laundry wastewater contains different substances such as organic (fat, grease, oil, soaps, detergents, chlorinated and aromatic solvents, starch and in general high BOD content) and inorganic (metal ions and particles, heavy metals, sand and soil dust) contaminants. Phosphate content in laundry wastewater leads to eutrophication in water bodies. Hence it is generally difficult to treat with conventional technologies but at the same time important to clean prior to discharge.
Why choose SWT-CDI?
SWT-CDI (Capacitive Deionization) technology is capable of removing several types of contaminants in the laundry wastewater through non-faradaic and controlled faradaic processes. The output water quality can be tailored depending on the requirements, whether it be for discharge into a wastewater treatment plant or for re-use.
- Effective BoD and surfactant
- Robust towards different contaminant types
- Tailorable output water quality
- Chemical free treatment and low energy needs reduces OPEX
- Modular design for adaptable system capacity