Today we’ll talk about blue-green algae and our experience of defeating it.
So, many have seen and know what blue-green algae look like – when the water turns green, it “blooms” in the heat. The unpleasant color and smell of water is caused by cyanobacteria, unicellular (planktonic) microscopic plants that are found in the Americas, Africa, Australia, Europe, Scandinavia and China – in fact, they are found all over the world.
The source of life of blue-green algae is the layer between silt and water – a substance that consists of hydrogen sulfide, carbon dioxide, nitrogen, phosphorus and other substances. Blue-green algae use these substances as a nutrient medium, and the warmth and sun in summer causes the rapid growth of blue-green algae. As a result, we have a dirty, untidy reservoir, opaque water with an unpleasant odor.
And all would be fine, but the main danger of algal water is a decrease in the amount of oxygen and an increase in toxins, ammonia and hydrogen sulfide. Such water is dangerous for people, animals and fish, you should not swim, or drink this water.
The good news is that algal water can be prevented or kept within normal limits. Traditionally, blue-green algae control is carried out by limiting the growth factors of cyanobacteria: the presence of basic nutrients (nitrogen and phosphorus), warm water with a temperature above 20 C, the absence of mixing of layers in the reservoir.
We highlight the main methods for blue-green algae control:
“Certain types of cyanobacteria produce toxins that affect animals and humans. The most frequent and serious health effects occur when such toxin-laden (cyanobacteria) water is ingested through direct consumption or recreational water use (PHENOLS, DIOXIN).
Cyanobacterial toxins are classified according to their effect on the human body:
- Hepatotoxins (affecting the liver) are produced by some strains of cyanobacteria: Microcystis, Anabaena, Oscillatoria, Nodularia, Nostoc, Cylindrospermopsis и
- Neurotoxins (affecting the nervous system) are produced by certain strains: Aphanizomenon и
Cyanobacteria of the species Cylindroapermopsis raciborski can also produce toxic ALKALOIDS that cause gastroenterological symptoms or kidney disease in humans. “
- Mechanical method – water is pumped out of the upper layers of water together with algae, then the algae are separated in filters or centrifuges and the possible production of liquid or solid fuel from them (or disposal). This method requires the creation of special production facilities and departments for monitoring and maintaining water bodies – floating barges / installations for collecting blue-green algae, factories for processing into fuel are needed.
- The Biological method is aquatic organisms, such as chlorella, a green freshwater unicellular alga that displaces cyanobacteria, subject to the nutritional chain (fish, molluscs that feed on chlorella).
- Aeration– oxygenation of the ponds. A simple and effective method of blue-green algae control, that does not require the creation of special units. Supplemental oxygen accelerates the OXIDATION and DECOMPOSITION processes and also reduces the amount of nutrients, which are helps for algae growth.
Aeration also helps remove carbon dioxide and other gases that are released during decomposition. The movement of water arising from the use of aerators and mixing of the layers of the reservoir promotes the distribution of phytoplankton in depth and becomes more uniform.
It is not worth considering the annual bloom of water in a pond as an inevitable evil. Their growth can and should be controlled and contained, and the experience of our clients shows that Green Stream aerators do an excellent job with this task. Take care of nature, and we will help you!
Green Stream Team