AKV ADVANCED AERATION / DEGASIFICATION TECHNOLOGY
AKV aerators/degasifiers are designed to combine and intensify the
processes of liquid aeration and gas removal in a simple and effective
way without bulky or complex equipment. Gasses dissolved in water can
present numerous problems for the consumer. For example, hydrogen sulphide
gas gives water a rotten egg odor; carbon dioxide gas causes high corrosion
of concrete, pipes and equipment; methane gas, which is colorless, odorless
and tasteless, accumulates in the water system and causes system noise,
water hammering and faucet spitting; radon gas, which occurs naturally
in groundwater in varying quantities is a known carcinogen.
We propose to remove/reduce gasses from water by means of vacuum. Naturally,
there is nothing new in applying vacuum. The novelty is in the fact
that water itself creates vacuum.
Our device comprises a set of ejection heads and vacuum chambers. Feed
water is supplied at the pressure of 3-4 atmospheres (65 PSI) and the
velocity of water flow reaches up to 180 km/h, thus creating deep vacuum
in the vacuum chambers. Dissolved gasses are immediately released. The
water flow sucks atmospheric air into the device, causing water to break
up and form a massive contact surface where the release of dissolved
gasses is greatly intensified. The view is impressive: water seems to
boil and turns as white as milk. Combination of vacuum and water break-up
accelerates the process of gas removal by a factor of 1500 - 3000! Gasses
are removed in a fraction of a second. It must be noted that these results
are achieved without the use of additional equipment or electricity
consumption. Water works to purify itself - with better results.
The AKV aerators/degasifiers can be designed for flow-rates from 0.3
m3/hour to 240 m3/hour and over.
AKV aerator/degasifiers for 50
m3/day and 100 m3/day
Typically, the length of a standard 50 or 100 m3/day aerator/degasifier
is approximately 100 cm depending on the application, and diameter
in the widest point is approximately 10 cm. Weight: approximately
2 to 3.5 kg depending on the fabrication material.
The AKV aerators/degasifiers can be fabricated from carbon steel or
stainless steel or plastic.
The aerator/degasifiers featured in the photograph above are made
from acetal - a high performance engineering polymer.
The AKV aerators/degasifiers have been used in USA, Australia, Belarus,
Russia and Ukraine in the following applications:
- Removal of high concentrations of iron
and manganese from groundwater with low capital and operational
costs;
- Non-reagent raise of pH value of groundwater (from šĶ 5,4 to šĶ
6,8
8,0);
- Preliminary aeration/degasification of water for the reduction
in reagent consumption;
- Removal of dissolved gasses to reduce corrosion of pipes, equipment
and concrete;
- Aeration/degasification of wastewater and cavitation processing
of active sludge to increase the efficiency of biological treatment
systems;
- Increase of dissolved oxygen levels in water to saturation point;
- Quick and effective mixing of reagents with water (in place of expensive
volumetric reactors);
- Intensification of water disinfection process (chlorine consumption
is reduced by a factor of 1.5-2);
- Hydrodynamic heating of water for the intensification of water treatment
processes;
- Control over backwash operation in self-backwashing
filters with polymer floating media.
The AKV aerator/degasifier is a unique device that can provide solutions
to a wide range of water-related problems. For example, in fish farming,
a single AKV aerator/degasifier will perform the multiple task of: non-reagent
increase of water pH; removal of carbon dioxide; saturation of water
with atmospheric oxygen; degasification / fine fragmentation of active
sludge, facilitation in the biological oxidation of nitrites and ammonia
and slight increase in water temperature. The field of AKV aerators/degasifiers
applications can be potentially extended to other liquids, including
crude oil degassing, sugar syrup degassing, removal of VOC in groundwater
remediation, etc.
The AKV aerators/degasifiers do not clog in as the main chemical transformations
in water occur in the steps following the ejector, where the high velocity
of water and the cavitation effect prevent particles deposition on the
pipe inner surface.
Some other interesting processes occur in the device. For example,
as gas bubbles burst, they develop an inside pressure of up to 1,000
atmospheres (cavitation), which results in the heating of water and
the generation of radicals and oxidants (H2O2,
ozone, etc.). The surface of solid particles in water is instantaneously
refreshed and becomes more susceptible to chemical and physical reactions.
The curves below show specific energy consumption by a bore/recycling
pump that supplies feed water to the AKV aerator/degasifier at pressure
of 63 PSI (0.45 MPa) for some applications:
1 - Specific electric energy cīnsumption for the removal of CO2
from water
2 - Specific electric energy cīnsumption for raising the
pH of water by the removal of CO2
Alex Remizov
E-mail: remizov@rivne.com
