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Links to deliverables and publications from FP7 projects, as well as links to some specific result types such as dataset and software, are dynamically retrieved from OpenAIRE .
Exploitable results
The method which was developed in this project uses acoustic and electric force fields to enhance filtration by increasing filtration capacity and by reducing production costs and consumption of energy.
In both laboratory and PILOT scale filtration experiments the application of an electric field significantly increases the cake capacity of vacuum disc filter. When constant DC electric field was applied across the ceramic capillary filter, about 3.5-fold cake capacity values (with electric field: 250 kg D.S./m2h, without: 70 kg D.S./m2h) were recorded during the filtration of titanium dioxide suspension using laboratory scale filter. Using continuous operating PILOT scale filter values with and without electric field at its best were 40-60 kg D.S./m2h and 5-10 kg D.S./m2h respectively.
When ultrasonic field was used during cake drying it was possible to obtain a rapid dewatering effect, up to 6 % decrease in cake moisture content, from 24 wt-% to 18 wt-% using laboratory scale filter. In continuous operating pilot scale filter the decrease in cake moisture content was about 3 %, to 21 wt-% cake moisture. The work developed during the project has revealed that the use of ultrasound is an effective way to increase the dewatering efficiency of the cake filtration processes. The most important advantages of this process are obtained in the filtration of suspensions with very fine particles, where conventional systems are inefficient. The need of polluting thermal drying will be reduced due to the dryer product. Drier product is also easier to handle.
The benefits of Electro-acoustic technologies are not restricted to improvement of the process efficiency itself, but these technolo-gies also meet the increasing challenges of both cleaner technologies and a cleaner environment. The first industrial applications will be in solid-liquid separation in the area of fine and ultrafine particle suspensions (for example Titanium dioxide). The industrial minerals are consumed by a wide range of industries. Titanium dioxide is the most widely used non-toxic white pigment, which is in common use in various products, raw materials and commodities, for example paints, plastics, paper, ceramics, textiles and rubber.
This research project will improve technology transfer between different types of industries, for example small ultrasonic equipment manufactures and big industrial diversified companies. Also, there is a high possibility that study within the project will relate directly to one or more other project that the partners (especially universities and research institutes) are involved in, and could well provide alternative solutions to difficult problems.
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