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Ubertone has developed a new hardware for industrial and low power applications. This new development pushes further the technological limits of UVP to reach a lighter and smaller board. The electronics consumes less and powers up very quickly. The device communicates through the Modbus protocol over RS485. The comparison with a reference UVP prove...
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... Apart from the convenience of having instruments of small size and wireless that can be controlled with a smartphone, these characteristics may be a strong advantage when working on large setups, industrial plants or on moving systems. This is the case in many physical models used in hydraulic engineering [1] or on small rivers [2] in which high resolution velocity measurements are needed. This presentation will focus on the UB-Lab P, with an application example on a physical model of a river section. ...
Through its hardware size, the installation and handling of UVPs was not convenient. Also the setup complexity limited the UVP technology to trained users or ultrasonic technology experts. In this extended abstract, we present the world's first handheld UVP, which simplifies its use on large setups and moving systems. The UB-Lab P has, through the presented results, proven its efficiency in hydraulics engineering studies on physical models, especially with a moving carriage. The high sensitivity of the UB-Lab P enables measurement even in low scatterers suspension conditions, such as low flow rates. The cloud.ubertone.eu processing and visualization tool allows fast visualisation of raw measured data. It also provides processing scripts to prepare the data for non-acoustics-experts, synchronising carriage positioning systems with velocity measurements, processing the raw Doppler velocity measurements in multi-components vectors and filtering data.
The conventional activated sludge process is the most widely used process for treating urban wastewater. Biomass (activated sludge) grows and forms biological flocs that must be separated from the treated water. This is usually performed by gravity in a clarifier. Activated sludge particles are subject to different settling processes, depending on their properties. Clarifier simulation is probably the most developed field of application for computational fluid dynamics applied to wastewater treatment. However, all sedimentation mechanisms are not always fully represented. This work began by adding the compression mechanism as a second-order term in the partial differential equation describing sludge sedimentation. The parameters of the modified model were identified based on experimental data from a closed system. Then, simulations of a full-scale clarifier allowed the model to be validated based on the measured sludge blanket height and particle velocity profiles. Small treatment plants are characterized by very dynamic inlet conditions (flow variations, on/off cycles). Thus, the validated model was used to simulate these operating conditions.
