One of the first commercially available low frequency ultrasonic devices working on continuous mode, Sonitube®, is presented and described here below. This apparatus, unique in its design, is not only of an easy handling but also does require neither heavy maintenance nor high energy input. In addition the great advantage to work on continuous mode allows to foreseen potential pilot and even small scale industrial applications with flow-rates from 50 to 800L/h. Its potential has been so far explored in protein disaggregation, dispersion of aggregates and particles and transesterification processes. Here, some preliminary results done on biogas processing will be presented and discussed, highlighting the high potential of this device.

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