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Bio-mat consists of anaerobic bacteria (bacteria that grows without oxygen) and the waste generated by these anaerobic bacteria processing the 70% organic matter that generally discharges from a septic tank. Bio-mat can form in any type of septic system that utilizes a septic tank in front of a secondary treatment system. Under normal conditions a septic tank doesn't clean up its discharge but simply breaks larger solids down into smaller particles. These smaller particles, consisting of as much as 70% organic matter, exits the septic tank and then must be processed in the secondary treatment system. Anaerobic bacteria and the waste generated by these anaerobic bacteria processing this organic matter are what make up Bio-mat. When you convert your septic tank to the Aerobic process and process the waste inside the septic tank discharging as high as 95% clear water, you eliminate the anaerobic bacteria and the 70% organic matter that normally exits the septic tank, which essentially eliminates the food source for Bio-mat causing it to starve and die. Once the Bio-mat is gone you have clear water discharging directly into the soils rather than raw sewage through bio-mat. 

Bio-mat can and will form in any type of secondary treatment system following a septic tank. As an example, once the septic tank effluent discharges to the drain field anaerobic bacterial growth forms beneath the distribution lines and within the first inch or so of the soils. This formation is considered the Bio-mat and eventually known as the “clogging mat”. This “clogging mat” when formed is seen as a very black slimy material. It seems similar in body make-up to jello. This jello like material continues to grow thicker over the years until at some point in time the septic tank effluent has difficulty in penetrating it to reach the soils below. This bio-mat consists of anaerobic microorganisms, which are bacteria that grow within a septic tank that do not need oxygen. These anaerobic bacteria will slowly utilize the small waste particles exiting the septic tank for their nourishment. By converting to an aerobic system you will eliminate the Bio-mat's food source and starve it causing it to die and disappear. Part of the treatment in these types of systems consists also of some aerobic bacteria, which is a form of bacteria that needs oxygen to thrive. When a stool is flushed inside the home the discharge heads for the septic tank with the oxygen needed to promote the growth of aerobic bacteria. Once entering the septic tank the oxygen is lost causing the aerobic bacteria to die and the anaerobic bacteria to take over. Once this effluent discharges the septic tank filled with anaerobic bacteria that will form the bio-mat then some aerobic bacteria will begin to grow again utilizing the oxygen found in the soil.

As the Bio-mat continues to grow over the years the effluent discharging the septic tank cannot penetrate through it causing the effluent level inside the drain field trenches to rise where it will absorb through the sides of these trenches. After a period of time the sides of these trenches will begin to clog. Once the bottom and the sides of these trenches are clogged with Bio-mat, the effluent will begin to back up into the septic tank. Most septic tanks have approximately 4 inches of fall between the inlet of the septic tank and the outlet. If the effluent level raises 4 inches in the septic tank because it can no longer enter into the absorption field than it begins to back up the inlet pipe. Once this happens the drains in the home will become very sluggish as there is nowhere for the effluent to go. Bio-mats purposely restrict the flow of effluent to the soils allowing them time to filter out the pathogens and viruses. Eventually the hydraulic loading rate (gallons of water being drained from the home) will exceed the soil absorption capacity of the drain field. Once this happens the septic tank effluent will either back up into the home or discharge to the ground surface causing ponding.

Once your conversion is done to an existing septic tank the dynamic of how a septic tank works is dramatically changed. The new system will introduce large amounts of oxygen inside the septic tank that will rapidly proliferate the growth of aerobic bacteria inside the tank. Aerobic bacteria are much more effective at processing waste and will thrive under the oxygen generated conditions. Rather than discharging raw sewage into the drain field, seepage bed, sand filter, mound system, cesspool, or whatever type of secondary treatment system you might have the waste is processed inside the septic tank. This system has been tested and proven to discharge approximately 95% clear and odorless water to the secondary treatment system. When the waste is processed inside the septic tank with clear water discharging to the secondary treatment system the Bio-mat loses it's food source and will quickly die. Since Bio-mat needs anaerobic bacteria (bacteria that grows without oxygen) to form, this Bio-mat that has been growing in the secondary treatment system for many years, quickly begins to break-up.

The new generated clean effluent, mixed with large amounts of aerobic bacteria, entering into the drain field, mound system, drip system, or any type of absorption system, will cause the Bio-mat to disappear allowing the clean effluent to easily penetrate into the soils once again. Since the aerobic bacteria are very effective at reducing disease causing pathogens the rejuvenation and transformation of the septic system is complete.


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