2012 - Europe Direct Iasi

EUROINVENT 2012
the gaseous to the liquid phase, is a vital part of a number of
wastewater treatment processes. Because of the low solubility of
oxygen and the consequent low rate of oxygen transfer, the needed
quantity of oxygen required for aerobic waste treatment through
normal surface air-water interface is insufficient.
To transfer the needed large quantities of oxygen, additional
interfaces must be formed. Submerged bubbles aeration is most
frequently accomplished by dispersing air bubbles into the liquid.
The diffused or bubble aeration process consists of contacting gas
bubbles with water for the purpose of transferring gas to the water.
The most commonly used diffuser system consists of a matrix of
perforated tubes/membranes or porous plates arranged near the
bottom of the tank. Such a system was considered in the present
research.
Both results (from numerical simulations and experimental
researches) show that the introduction of biomedia in the reactor
increases the time contact between air bubbles and water and so
the mass transfer of oxygen is more efficient.
X. 17.
Title “Mini”Class Underwater Remotely Operated Vehicle
Authors Octavian Tărăbuță, Vasile Dobref
Institution “Mircea cel Batran” Naval Academy
Description
The Remotely Operated Vehicles (or ROV) are dedicated
underwater systems with various degrees of autonomy,
controlled by a human operator. ROVs may be fitted with a large
array of sensors for visual or acoustic inspection of submerged
targets or for measurement of hydrographic parameters as
temperature, salinity, density, etc.
The ROV presented has relatively small dimensions (900 x 300 x
400 mm) that put it in the so-called “mini” class. The research
team chose to propel the ROV with 2 horizontal and 2 vertical
DC motors that provide the necessary movement in the water.
For a better hydrodynamic behavior, the components are
enclosed in a watertight streamlined body designed to withstand
pressures of up to 4 bars. The control commands and the
information from sensors (optical, depth, course, motors speed)
are given and received through a laptop where the interface
software is loaded.
The novelty of this project is given by the low cost of the ROV.
Innovative Researches
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