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The waste matter in a septic system breaks up when naturally occurring bacteria eat the organic material in waste water. Adding a septic aerator promotes the development of naturally-occurring aerobic bacteria as a means of processing effluent.
Aerobic septic systems differ from standard septic systems because they help to introduce air into the process, like a bubbler or weir which oxygenates the water.
As with a standard septic system, anaerobic bacteria break down in the tank, like lactic acid fermentation, no air required. Aerobic septic systems can be added to existing septic systems, because the aerobic system requires a pre-treatment phase to remove large solids from the wastewater, which the septic tank accomplishes nicely. On a small scale, the aerobic process is accomplished using a medium for the water to flow through, facilitating the exposure to air. Once the septic tank fills up with waste water, the waste water then exits the septic tank via an out let pipe and is discharged into a soak away and then into the soil.
The oxford dictionary defines a soakaway as… ‘a pipe or trench into which waste water drains into. Top soil can be 1 to 3 foot in depth, and has lots of air spaces between the soil particles which contains oxygen. Aerobic simply means (oxygen breathing).  So for a soakaway to work perfectly it must be created in the top soil. So in conclusion… Topsoil is the perfect medium for soakaways because not only does it allow wastewater to drain away perfectly, it also allows friendly bacteria to grow in the soakaway and the soil surrounding it. Soakaway trenches are narrow trenches with clay or perforated pipes placed into them and are backfilled with gravel. The traditional soakaway was made from trenches filled with pipes and gravel is basically a french drain. A perforated pipe is then laid on top of the granular bed and the pipe is then covered with approximately 50mm of shingle or gravel. Soakaway pits are holes dug into the ground that are backfilled with rubble or gravel into which the wastewater discharges into.
Each of these septic tanks regardless of construction, shape or design all have one thing in common, deep outlet pipes. The typical depth of the outlet pipe on most onion shape septic tanks is 1000mm (1 metre) or more below the grass. This might seem like a good idea, but in reality septic tank soakaway pits never work well for long. 2. Soakaway pits become clogged with fat, grease and sludge over time and make it hard to construct and install a new soakaway in the same location. By digging a shallow pit or trench and filling them with soakaway crates you retain around 90% of the original cavity. Polybed soakaway pipes replace the old traditional soakaway method of trenches filled with gravel and perforated pipe.

Conventional Septic Systems have traditionally been the most commonly used technology for treating wastewater. A conventional gravity flow septic system consists of a series of tanks or a compartmented tank followed by a distribution system.
The conventional gravity flow septic system is usually the most inexpensive system to install and operate for on-site wastewater disposal. Aerobic Units treat wastewater for homes and small businesses using the same process, only scaled down, as our municipal wastewater treatment systems use. Aerobic units, which are certified as Class I aerobic systems, treat wastewater well enough to be used in conjunction with spray systems, which distribute treated wastewater over lawns. The Texas A&M Extension Research Center publishes information sheets on septic information. If you do not know how to find the manufacturer or have a different brand of system that is not a problem.
Under aerobic conditions, bacteria rapidly consume organic matter to restore failing septic systems.
The benefits of aerobic treatment are simple-- it requires about half the space of a leach field system, has little odor, yet produces a more environmentally friendly waste effluent.
Suspended solids in the water exiting the tank are then exposed to the aerobic system which utilizes a bacterial digestion process to reduce waste material, by incorporating air for speedy breakdown. Within the ABG, circulating septic tank liquids pass over 150 square feet of surface area in which a dense colony of ABG blend bacteria attach and thrive. Leach fields are quickly opened up, further increasing the efficiency of the entire system. The nitrification phase of treated effluent is virtually eliminated, resulting in direct denitrification. Please also feel free to browse any of our other websites exploring the various divisions of Prieto Engineering and look into some of the services we can provide for you. This oxygen encourages and aids the bacteria in the soil to treat and clean the waste water effluent. A layer of geotextile should then be placed over the drainage stone to prevent the entry of silt. When you fill a pit back in with gravel or rubble the cavity is then reduced from 100% to 10-15% of its original size. The septic tanks are used to settle out solids and partially treat wastewater before it reaches the distribution system. They remove 85 to 98 percent of the organic matter and solids from the wastewater, producing efflu-ent as clean as that from municipal wastewater treatment plants, and cleaner than that from conventional septic tanks. A settling chamber, com-monly called a clarifier, which provides a place for the microbes that have treated the wastewater to settle out of the water.

Bubblers are commonly used to ensure continuous aeration and water movement which helps accelerate the decomposition process.
The new system is then installed which incorporates a septic aerator to ensure a constant air supply bubbling through the water, thus assisting with aerobic decomposition before waste water is allowed to continue to the leach field. The remainder of the trench can then be filled in with soil.  Although these soakaways were designed with good intentions, and served the basic function of sanitation they typically have a limited life span and more often than not caused pollution issues. They have the lowest cost and require the least amount of maintenance, which is generally limited to periodic pumping of the septic tank.
An aeration system consists of an air pump, piping and diffusers that force air into the aeration chamber.
Aerobic treatment units usually disperse wastewater via spray distribution systems, which include a disinfection component for removing disease-causing microorganisms, a pump tank for dosing water, and spray heads for spreading the water over the ground. A chlorinator is also added inline prior to release, using a mild bleach solution to help eliminate additional bacteria. This arrangement allows the drain field a break from the excess nutrients, allowing the area to regenerate and return to normal. In single volume tanks, cesspools and inlet chambers of septic tanks, this digestion is so complete that regular pumping is no longer necessary. Surrounding the entire length of this spine are hundreds of special granular polystyrene medium. They consist of gravel-filled trenches, plastic chambers or plastic pipe installed underground to hold the wastewater leaving the tanks until it can seep into surrounding soil. The air pump, located near the aerobic tank, compresses air to flow into the aeration chamber. In a normal gravity type system, with a leech field, the activity hopefully takes place in the porous upper couple of feet of soil. With a little planning and patience, aerobic septic systems can save a failing leech field. The diffuser forces the air into the water, dividing the air into bubbles that float to the surface. The oxygen in the air bubbles goes into the water for the microbes, while the rising bubbles mix with the water. Microbes living in the soil break down the solids and kill the bacteria and pathogens in the waste-water.

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10.08.2014, author: admin

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