About the OLOID
The New Approach to Water
Water and energy: both are basic elements of the future. Since 1995 the OLOID AG offers an innovative technology for the treatment of waste water and liquid media. The engines may be used simultaneously as agitators, mixers and surface-aerators. This agitating- and aerating technology is based on a three-dimensional and pulsating motion and on a very special shape of the stirring body, the OLOID. The result: a most sparing energy consumption and best possible solutions in process engineering and environmental technology.
Technical characteristics are:
- pulsating, directed flow and circulation
- generation of oscillations and waves
- gentle treatment of the composite
- support of biological processes, efficient aeration
Applications:
- pond sewage-treatment plants
- sewage-treatment plants: for de-nitrification, elimination of phosphate, reduction of floating sludge
- ice free keeping of lakes and ponds, buffer tanks for run-off from airports contaminated with de-icing agents, ponds for snow making water (preparation)
- ponds on golf courts and in parks, rain catchment basins, oxidation ponds
- flocculation and sludge treatment
- leach-ate of landfill- and composting plants, run-off from composting plants
- catchment basins for industrial waste-water and for general nurseries
- rain catchment basins for communities
- fish-, shrimps- and algae breeding; aquarist
- liquid manure, biogas plants, wine effluent
- prevention of algae- and blue-green algae blooms
- agitation and homogenization of various liquid media
About Algae
ALGAE
What are blue-green
algae?
Cyanobacteria
is the
scientific name for blue-green algae, or "pond scum." The first
recognized species were blue-green in color, which is how the algae got
their name. Species identified since range in color from olive-green to
red.
Cyanobacteria form in shallow, warm, slow-moving or still water. They are made up of cells, which can house poisons called cyanobacterial toxins. A mass of Cyanobacteria in a body of water is called a bloom. When this mass rises to the surface of the water, it is known as surface scum or a surface water bloom.
The
arrival of spring often presents a problem for pond owners as the
beautiful, clear green water of their ponds disappears beneath a blanket
of lime green, slimy, stinky pond scum. "Pond scum" is actually a
popular term for aquatic algae, which tend to "bloom," or grow
excessively in the early months of spring, spreading over the surface of
the pond in unsightly and odorous mats of green and brown.
There are
two large groups of algae which are important. These are the floating
and the string algae.
Floating algae
Unicellular and rather float in water and give it a
green appearance. At larger concentrations of floating algae it is
possible water becomes so turbid that it becomes nontransparent. Dead
floating algae drop on the floor and sites
and cause greenish mats.
String algae
Unicellular as well, but because they join to each other, they can develop into large constructions. Their appearance can vary from thread-like on obstacles under the waterline to vast clouds of strings that become up to meters long.
Several factors influence algae development in water:
- Feeding substances like nitrates & phosphates in water can cause explosive increase of algae
- Light is the most important factor, as algae practices photosynthesis.
- In covered water body we find algae as part of the bio-film.
- Temperature: 25-30°C is optimum. Growth starts at 4°C
- Stagnant water: floating algae thrive best in stationary water. String algae however can handle strong water movements (waterfalls, boats)
BIOFILM
A
biofilm is
a complex aggregation of microorganisms marked by the excretion of a
protective and adhesive matrix. Biofilms are also often characterized by
surface attachment, structural heterogeneity, genetic diversity, complex
community interactions, and an extra-cellular matrix of polymeric
substances.
Single-celled organisms generally exhibit
two distinct modes of behavior. The first is the familiar free floating,
or planktonic, form in which single cells float or swim independently in
some liquid medium. The second is an attached state in which cells are
closely packed and firmly attached to each other and usually a solid
surface.
Biofilm grows
best in slightly polluted water. The presence of nutrients stimulates
the shaping of biofilm. However also in controlled water systems there
is biofilm growth.
Also pathogenic
micro-organism develop in the biofilm . Certain biofilm even deliver
corrosion stimulating substances such as organic acids or sulfide
by-products. The presence of biofilm can disturb the functioning of
valves and pumps and decrease the productivity of heat exchangers