Home

Understanding what is involved in septic tank pumping, it’s first important to understand what a septic system does and how it works. A septic system is an underground treatment system for household sewage. A typical septic system consists of 4 components: the pipe from the house, the septic tank, a drain field and the soil. Damage or malfunction of any of these components can cause the system to fail which can result in soil and drinking water contamination and costly repairs or replacements by the homeowner.

Contact Info:
Name: Billy Fowler
Email: info@asapadvancedseptic.com
Organization: ASAP Advanced Septic & Drainage, Inc.
Address: 5011 E Busch Blvd, Tampa, FL 33617
Phone: (813) 986-6070

Aerobic Septic CareSeptic Pumping

Is Vinegar Safe for Septic Tanks?

An aerobic treatment system or ATS, often called (incorrectly) an aerobic septic system, is a small scale sewage treatment system similar to a septic tank system, but which uses an aerobic process for digestion rather than just the anaerobic process used in septic systems. These systems are commonly found in rural areas where public sewers are not available, and may be used for a single residence or for a small group of homes.

Unlike the traditional septic system, the aerobic treatment system produces a high quality secondary effluent, which can be sterilized and used for surface irrigation. This allows much greater flexibility in the placement of the leach field, as well as cutting the required size of the leach field by as much as half.[1]

The ATS process generally consists of the following phases:[2]

The disinfecting stage is optional, and is used where a sterile effluent is required, such as cases where the effluent is distributed above ground. The disinfectant typically used is tablets of calcium hypochlorite, which are specially made for waste treatment systems.[3] The tablets are intended to break down quickly in sunlight. Stabilized forms of chlorine persist after the effluent is dispersed, and can kill plants in the leach field.

Since the ATS contains a living ecosystem of microbes to digest the waste products in the water, excessive amounts of items such as bleach or antibiotics can damage the ATS environment and reduce treatment effectiveness. Non-digestible items should also be avoided, as they will build up in the system and require more frequent sludge removal.[4]

Small scale aerobic systems generally use one of two designs, fixed-film systems, or continuous flow, suspended growth aerobic systems (CFSGAS). The pre-treatment and effluent handling are similar for both types of systems, and the difference lies in the aeration stage.[1]

Fixed film systems use a porous medium which provides a bed to support the biomass film that digests the waste material in the wastewater. Designs for fixed film systems vary widely, but fall into two basic categories (though some systems may combine both methods). The first is a system where the media is moved relative to the wastewater, alternately immersing the film and exposing it to air, while the second uses a stationary media, and varies the wastewater flow so the film is alternately submerged and exposed to air. In both cases, the biomass must be exposed to both wastewater and air for the aerobic digestion to occur. The film itself may be made of any suitable porous material, such as formed plastic or peat moss. Simple systems use stationary media, and rely on intermittent, gravity driven wastewater flow to provide periodic exposure to air and wastewater. A common moving media system is the rotating biological contactor (RBC), which uses disks rotating slowly on a horizontal shaft. Approximately 40 percent of the disks are submerged at any given time, and the shaft rotates at a rate of one or two revolutions per minute.[1]

CFSGAS systems, as the name implies, are designed to handle continuous flow, and do not provide a bed for a bacterial film, relying rather on bacteria suspended in the wastewater. The suspension and aeration are typically provided by an air pump, which pumps air through the aeration chamber, providing a constant stirring of the wastewater in addition to the oxygenation. A medium to promote fixed film bacterial growth may be added to some systems designed to handle higher than normal levels of biomass in the wastewater.[1]

Another increasingly common use of aerobic treatment is for the remediation of failing or failed anaerobic septic systems, by retrofitting an existing system with an aerobic feature. This class of product, known as aerobic remediation, is designed to remediate biologically failed and failing anaerobic distribution systems by significantly reducing the biochemical oxygen demand (BOD5) and total suspended solids (TSS) of the effluent. The reduction of the BOD5 and TSS reverses the developed bio-mat. Further, effluent with high dissolved oxygen and aerobic bacteria flow to the distribution component and digest the bio-mat.Doing so on single tank systems where solids do not have anywhere to settle, or there is no a clarifying area can do damage to the field lines as the solid matter is stirred up in the tank.

Composting toilets are designed to treat only toilet waste, rather than general residential waste water, and are typically used with water-free toilets rather than the flush toilets associated with the above types of aerobic treatment systems. These systems treat the waste as a moist solid, rather than in liquid suspension, and therefore separate urine from feces during treatment to maintain the correct moisture content in the system. An example of a composting toilet is the clivus multrum (Latin for 'inclined chamber'), which consists of an inclined chamber that separates urine and feces and a fan to provide positive ventilation and prevent odors from escaping through the toilet. Within the chamber, the urine and feces are independently broken down not only by aerobic bacteria, but also by fungi, arthropods, and earthworms. Treatment times are very long, with a minimum time between removals of solid waste of a year; during treatment the volume of the solid waste is decreased by 90 percent, with most being converted into water vapor and carbon dioxide. Pathogens are eliminated from the waste by the long durations in inhospitable conditions in the treatment chamber.[5]

The aeration stage and the disinfecting stage are the primary differences from a traditional septic system; in fact, an aerobic treatment system can be used as a secondary treatment for septic tank effluent.[1] These stages increase the initial cost of the aerobic system, and also the maintenance requirements over the passive septic system. Unlike many other biofilters, aerobic treatment systems require a constant supply of electricity to drive the air pump increasing overall system costs. The disinfectant tablets must be periodically replaced, as well as the electrical components (air compressor) and mechanical components (air diffusers). On the positive side, an aerobic system produces a higher quality effluent than a septic tank, and thus the leach field can be smaller than that of a conventional septic system, and the output can be discharged in areas too environmentally sensitive for septic system output. Some aerobic systems recycle the effluent through a sprinkler system, using it to water the lawn where regulations approve.

Since the effluent from an ATS is often discharged onto the surface of the leach field, the quality is very important. A typical ATS will, when operating correctly, produce an effluent with less than 30 mg/liter BOD5, 25 mg/L TSS, and 10,000 cfu/mL fecal coliform bacteria. This is clean enough that it cannot support a biomat or "slime" layer like a septic tank.[6]

ATS effluent is relatively odorless; a properly operating system will produce effluent that smells musty, but not like sewage. Aerobic treatment is so effective at reducing odors, that it is the preferred method for reducing odor from manure produced by farms.[7][8][9]

How it works

A very basic explanation of how the system works begins with waste water leaving the house through the plumbing network inside the house to the pipe leading to the septic tank. The tank is buried underground and is usually constructed in a water tight manner of concrete, fiberglass or polyethylene. It is intended to hold the waste water long enough to allow the solids to settle to the bottom (to form sludge) and the oils to float to the top (to form scum). Some of the solid waste decomposes as well. There are compartments and a “t” shaped outlet from the septic tank that prevents the sludge and scum from leaving the tank to travel to the drain fields. Once the liquid enters the drain field, it is filtered through the several layers of soil for the final treatment by removal of harmful bacteria, viruses and nutrients.

Sewage Pumping ContractorSeptic Repair

Pumping Your Septic Tank: How Often Does It Need To Get Done?

There are multiple costs associated with a Septic System. I'll start with an explanation of the costs and give the actual estimates at the bottom:

Explanation of Septic Costs:

Cost to Pump Out the Septic Tank: Homeowners should have a licensed septic contractor pump out their septic tank every 3 to 5 years. If the tank is never pumped, then grease and other particles will flow into the leach field and clog the distribution pipes and the surrounding soil. Once that happens, he will need to have a new leach field installed at a cost of $10,000+.

Listing of Estimated Septic Costs:

Cost to Pump Out the Septic Tank: $150 to $250

Cost of Septic System Testing with Dye: $75 to $125

Cost to Remove Clog in Pipes to Tank: $50 to $250 (or more, if it's serious)

Cost of Complete Visual Inspection: $300 to $600

Maintaining a regular schedule of septic tank pumping will help keep your system running efficiently and will save you hundreds of dollars in expensive system repairs.