Aerobic Septic System

Large space and porous soil are two essential requirements of conventional septic systems. However, every site may not be equipped with these basic requirements. In such cases, installing conventional anaerobic system is not a viable option. As aerobic septic systems do not demand any such prerequisites, they can be considered as an ideal option in such situations. These systems inject oxygen in the sewage water to stimulate the growth of aerobic microorganisms. These microorganisms break down the waste materials so as to facilitate further treatment of effluents. However, these septic systems are not the best option available as there are certain installation and maintenance issues associated with them.

Working

The system works in two stages and the first stage is similar as in anaerobic septic system. Air pump, rotor, agitator are some of the important parts, in a basic two chamber system. The waste water flows into the septic tank where the effluents are separated by an agitator. The solid waste materials gather at the bottom of the tank whereas the liquid waste materials are flown into the second chamber. Air is constantly blown into this chamber so that air bubbles are formed within the effluent. This oxygenated air promotes the growth of aerobic bacteria which breaks down the waste water. The processed water is then sterilized with chemical reagents and flown out of the system through pipes. Aerobic system is less time-consuming as compared to the conventional septic system. The reason is, as the air is continuously blown in, the process is continuous with quick results.

Cost

It can be installed above or below the ground level. The initial installation cost of aerobic system is several times that of a conventional system. Moreover, you will have to pay for additional excavation if you are installing it below the ground level. The site may need prior treatment, which may again add up to the installation cost. Additionally, you will have to make provisions for electrical connections and access to maintenance. The cost of aerobic septic system is greatly dependent upon the size of the unit, location of installation and the complexity of the system. Even after the installation is complete you will still have to bear the cost of electricity consumption as well as regular maintenance.

Maintenance

One of the most important problems is the need for routine maintenance. If you fail to maintain the system, it may pose severe hazards to the surrounding environment. The ambient temperature has to be maintained throughout the usage. The efficiency of the system may affect, if the ambient temperature is too low. Also, the balance of bacteria must not be disturbed at any cost. This can be particularly tedious for home owners, as they have to be careful about the cleaning products they use in their toilets. Cleaning agents such as bleach can kill the aerobic bacteria thereby disturbing their balance. Also, pouring down harmful chemicals through the drain can kill the bacteria and upset the biological balance inside the tank. The performance of the system may diminish if it is not maintained regularly. Turning off the system may result in several health hazards as there is a likelihood of spread of diseases to the neighborhood.

Although, aerobic septic systems are efficient and deliver a high performance, they demand a responsible use on the part of home owners. Due to their potential threat to the environment, some municipalities deny the permission to install them. Hence, you must check your neighborhood laws and codes to ensure if you can install the system at your home.