PWN Technologies provides drinking water treatment solutions to both the high end market and emerging countries. Where existing technology proved to be insufficient, PWN Technologies developed, tested and applied new technologies.
We are involved in the following projects:
The Andijk III plant in the Netherlands is based on PWN Technologies’ SIX (Suspended Ion eXchange) and CeraMac (ceramic membrane filtration process). It will produce water of a better quality with lower environmental impact and decreased energy consumption at a lower cost. Andijk III has a capacity of 5,000 m3 per hour or 120,000 m3 a day. The plant requires an investment of 50-60 million Euros.
SIX removes water turbidity (dissolved organic substances, nitrate and sulphate). SIX also ensures that the ceramic membranes are not contaminated too quickly. The passage through the ceramic membranes is the next phase of the treatment process. All particles larger than 1/10,000th of a millimeter are removed. Ceramic membranes last longer and are more reliable than polymer membranes. CeraMac is the first design that can compete with polymer membranes in terms of price.
The treated water may still contain a quantity of hazardous substances, such as pesticides, viruses or drug residues. That is why advanced oxidation is used after the CeraMac process, which uses a combination of UV and hydrogen peroxide to render these substances harmlessly. Since the clarity of water has increased thanks to SIX and CeraMac, considerably less energy is required for UV treatment. Finally, an active carbon filter removes the remaining substances from the water, making it fit for consumption. Andijk III will be operational at the end of 2013.
The construction site can be visited at www.pwntechnologies.nl/AndijkIII/cam1.html
PWN Technologies has built Singapore’s first ceramic demo plant at Choa Chu Kang Waterworks. This $5 million plant has been tested for more than 15 months now (September 2012) and the daily capacity grew from 1.2 million liters per day to 3 million liters per day because of the combination of CeraMac with ozone. The plant will be tested till the end of 2012 by PUB and PWNT to check its performance and optimize the system. This demo plant is made possible with a grant from the Technology Pioneer Scheme under the Environment & Water Industry Program Office (EWI).
Through an initial pilot project in 2007 at the Bedok NEWater Factory with ceramic membranes which showed encouraging results, PUB is moving forward with this demo plant to further evaluate the reliability and sustainability of ceramic membranes technology for large scale operations.
PWN Technologies has collaborated with engineering company Black & Veatch and Metawater who supplied the ceramic membrane elements.
In 2011 PWN Technologies and South West Water (UK) started a collaboration and feasibility project for the introduction of SIX/CeraMac in the southwest of England. In August 2012 PWN Technologies and South West Water signed an agreement for the delivery of a SIX/CeraMac pilot facility. This facility will be commissioned in February 2013 and will be tested over a period of 18 months.
PWN Technologies is participating in a study being funded by the Australian Water Recycling Center of Excellence (AWRCoE), and being led by Victoria University. The study will evaluate the efficacy of ozone in conjunction with ceramic membranes for water reuse over a 12 month period. PWN Technologies is supplying the membrane pilot plant and technical expertise. The trial is being carried out at Melbourne Water.
PWN Technologies and Black & Veatch have been appointed by the Cairns regional Council in Australia to investigate distributing drinking water without chlorine. The intention is to develop a monitoring program to monitor the water systems integrity before engaging in the chlorine free trial. All eyes in Australia will be watching the progress of this project. It will be the first time a system has converted to distributing water without a disinfectant residual.
PWN Technologies is involved in a number of projects in Vietnam: