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Sewage sludge disintegration
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Introduction Within the last decades, the wastewater treatment technique was predominantly concerned with the improvement of the biological purification performance in water treatment plants. In many areas, these measures have been completed. The focus for the future will be on the economical optimization of the plant. International studies prove that more than 50% of the existing digestion plants work insufficiently and show bad results. This has numerous causes which are often not investigated. Utilizing a suitable sewage sludge disintegration plant can remedy deficiencies in an easy and rapid way. Sewage Sludge Disintegration – A New Technology for Improvement of Digesters Generally, disintegration means the crushing (or: reducing) of sewage sludge by exposure to external forces. This happens e.g. by mechanical, thermal or chemical processes. The use of ultrasound (mechanical sewage sludge disintegration) has proved to be successful in science as well as in practice. It is reliable, economic and easy to be integrated in the process of a
wastewater treatment plant.
The VTA Reverse Flow Disintegration Unit (RFD) The Reverse Flow Disintegration Unit, developed and patented by VTA Technology Ltd., achieves the disintegration effect by means of ultrasound (25kHz frequency). A part of the accrued concentrated surplus sewage sludge continuously flows top down through the disintegration reactor. The ultrasonic transducers are located in this reactor. By means of an agitator the sludge suspension is treated by continuously being passed through the ultrasonic oscillators. Depending on the residence time of the sludge in the reactor, the flow rate, the rotation speed of the agitator and the energy input of the integrated ultrasonic elements, the digestion order (A-COD, release of enzymes) can be selected. The treated sludge is subsequently transferred to the digestion process. |
VTA Technologie GmbH |
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(c) 2004 |
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