Ultra-Pure Water

UP.HOH™ Ultrapure water  is water that has been purified to high levels of specification. As a standard, the water contains only H20, as well as balanced number of H+ and OH- ions. It has a resistivity of 18.2 MΩ.cm, TOC < 10 ppb and bacterial count <10 CFU/ml.

NanoWater  utilizes the ion exchange (IX) and electrodeionization (EDI) as  primary deionization technologies associated with UP.HOH™ production, in most cases following BioSal™  reverse osmosis System.

Depending on the required water quality, UPW treatment plants often also   feature degasification, microfiltration, ultrafiltration, ultraviolet irradiation, and measurement instruments (e.g., total organic carbon [TOC], resistivity/conductivity, particles, pH, and specialty measurements for specific ions).

UP.HOH™ EFFLUENT QUALITY

• Water resistivity: 13-17.5 MOhm-cm,
• TDS:10-5ppm
• Heavy metal<0.1ppb
• TOC<30ppb
• Bacteria <1 CFU/ml (for UT model)
• Particle (>0.22μm) :<1/ml (for UT model)
• production flow rate: 15 Liters/hour at 25 °C

UP.HOH™ PROCESS DESCRIPTION

To achieve this demanding processing goal, adapted treatment steps and a selection of the right materials are required

Pre-treatment for ultrapure water production
Which process combination is best suited for ultrapure water production depends in each individual case on the available raw water and the desired ultrapure water specification. For its customers, H+E combines pre-treatment processes that are ideally tailored to the required raw water quality. These can be simple multi-layer filters as well as activated carbon filters or ultrafiltration systems.

Make-up for the ultrapure water production
The different steps of the make-up process result in demineralization and the reduction of organic carbon (TOC). Possible processing technologies are: ion exchange, reverse osmosis, membrane degassing, TOC-UV, EDI and mixed bed technology . UP.HOH™ plant concept we developed for ultrapure water generation is also available for smaller plant throughputs.

Polishing for ultrapure water production
In the final stage of ultrapure water production, known as polishing, the highest UPW final quality is produced. The final treatment takes place before the water is fed into the distribution network – also known as the loop system. This enables us to ensure the required ultrapure water quality for our plants. This is achieved by UV irradiation, membrane degassing and membrane aeration, the use of a polisher mixing bed and a final ultrafiltration.