Their colours are variable, but all are solid.
Photos are solid evidence.
In addition, it has been proven that, in the range studied, the most influencing process variables are temperature and solid mass flow rate, mainly because both variables modify the gas residence time inside the reactor.
The seven physical variables are ϱ(ϱs), gas (solid) density, v, jet velocity, d, particle diameter, x, bed dimension, g, gravity and μ, gas viscosity.
These two variables are mutually exclusive because 'Solid tumour' may contain benign tumours.
The independent variables were the solids retention time (SRT, 5 30 d), hydraulic residence time (HRT, 5 25 h), feed Cu II) concentration (0 50 mg L−1) and PWS loading rate (0 4 g h−1) while percent Cu II), COD, toxicity (TOX) removals and the sludge volume index (SVI) were the objective functions.
The variables most affecting the ICFB performance are solids circulation flux, gas solid feedrates, riser diameter, working bed temperatures and waste properties.
In the simultaneous solution procedure, velocity variables are used for both fluid and solid, and the whole set of model equations is discretized by a stabilized time-discontinuous space-time finite element method.
The manipulated variables are selected using steady-state relative gain array (RGA) analysis to be the inlet molar flow rates of hydrogen and coolant, and the controlled variables are average power density and average solid temperature, respectively.
