The proper use of polymers as conditioners is a critical aspect of dewatering processes. In this study, we investigate their physical properties, i.e. size, density and fractal dimension and correlate them with their dewatering characteristics (bound water content, CST and SRF) on alum sludge with cationic polymer conditioning. Using CST measurement to determine the optimum polymer dose may lea...

A number of automated techniques for point measurement of soil moisture content have been developed to an operational level over the past few decades. While each of those techniques have been individually evaluated by the thermogravimetric (oven drying and weighing) method, typically under laboratory conditions, there have been few studies which have made a direct comparison between the various...

This paper starts with a systematic benchmark test of the three commercialised dielectric diagnostic methods RVM (recovery voltage method), PDC (polarisation and depolarisation currents) and FDS (frequency domain spectroscopy), performed on a large transformer model. Starting from the explored strengths and weaknesses a more sophisticated instrument with corresponding software was developed. Th...

An 8-electrode capacitance tomography (ECT) sensor was built and used to measure moisture content (MC) and mass flow of pine chip flows. The device was capable of directly measuring total water quantity in a sample but was sensitive to both dry matter and moisture, and therefore required a second measurement of mass flow to calculate MC. Two means of calculating the mass flow were used: the fir...

The prediction of hygroscopic swelling of flexible polymer substrates is crucial in various fields from smart structures to flexible electronics. In this study, the prediction method for time-dependent hygroscopic deformation is presented by employing the finite element method (FEM). In order to precisely consider the strain gradients inside the substrate, moisture distribution depending on tim...

The multipurpose field robot platform BoniRob offers a wide range of possible applications to be carried out by attaching different application modules called BoniRob-Apps. The Penetrometer-App can be used to measure penetration resistance, soil temperature and moisture. To be able to automatize the measurement process of soil properties a GNSSbased navigation for BoniRob has been developed wit...

[1] Achieving a representative elementary volume (REV) has become a de facto criterion for demonstrating the quality of lCT measurements in porous media systems. However, the data quality implications of an REV requirement have not been previously examined. In this work, deterministic REVs for porosity, moisture saturation (SW), and air-water interfacial area (AI) were estimated using a set of ...

nowadays, the limitation of water resources are added on the importance of detailed planning including the estimated timing and amount of irrigation water. this is possible with considering the soil indices and water balance. the measured soil field capacity of some with two lab and field measurement methods were 21% and 19/8% respectively and the permanent wilting point were determined 12% as ...

soil compaction and moisture content are two of the factors that greatly influence variations in crop yield. capacitance-based sensor is a sensitive device for estimating soil water content. in this method of soil moisture content measurement, soil acts as the dielectric of the capacitor. throughout this research work, a capacitance-based moisture sensor that can measure the soil moisture conte...