Biological septic tanks are sewage treatment systems designed to decompose organic waste through natural biological processes. They are a sustainable alternative to traditional septic tanks because they utilize aerobic microorganisms (which require oxygen to live) to decompose the waste, resulting in a high-quality treated effluent.
How do biological septic tanks work?
1. Biological decomposition: The operation of biological septic tanks relies on the activity of aerobic microorganisms present in the system. These microorganisms consume the organic waste in the sewage, breaking it down into simpler substances such as water, carbon dioxide, and inorganic compounds.
2. Treatment process: Domestic sewage is directed to the biological septic tank, where biological decomposition of the waste occurs. During this process, aerobic microorganisms consume the organic matter, thus reducing the pollutant load of the effluent.
3. Solid separator: Some biological septic tanks also have a solid separation system, which retains larger solid waste, allowing only treated liquids to be discharged into the environment.
4. Treated effluent: After undergoing the biological decomposition process, the treated effluent can be discharged into the natural environment, provided it meets the quality standards established by environmental authorities. In many cases, the treated effluent can also be reused for garden irrigation or toilet flushing.
Advantages of biological septic tanks
1. Environmental sustainability: Biological septic tanks promote the natural degradation of organic waste, reducing the pollutant load released into the environment.
2. Low maintenance costs: With the proper functioning of the biological system, biological septic tanks require less maintenance than conventional septic tanks.
3. Treatment efficiency: The biological process of biological septic tanks can result in a high-quality treated effluent, suitable for discharge into the natural environment or for reuse in irrigation systems.
4. Adaptation to different terrains: Biological septic tanks can be installed in areas where conventional septic tanks are not feasible, offering a flexible solution for various situations.
