The fibreglass systems are designed for ease of installation and ease of operation. They offer an economic solution while at eh same time ensuring an operating life of over 25 years. The various sections of an activated sludge process are clearly visible in the construction of the FAMSYSTEM FMP unit as each zone is contained in a separate tank. An anaerobic or interceptor tank: this tank is used for the initial digestion of the incoming sewage as well as the possible storage of activated sludge. It should be noted that no separate septic tank is required before these plants.
The aeration tanks (or tank) are flat-bottomed tanks with a special aeration ring positioned in the bottom of the tank. Air is introduced and by means of the special aeration system, intimate contact is established between the air and the solid matter. A number of designs are available to ensure that aeration is optimised in each plant. The use of fine bubble diffusers can reduce the power requirements of the plant. The third section of the plant consists of a clarifier tank where solids are settled and a clear overflow liquid is produced. Although more expensive to manufacture, only conical tanks are used for this application so that all sludge collected in the tank can be recycled. No solids will build up in the bottom of the tank which would become anaerobic and cause foaming in the settler, generating a dirty effluent.
In addition to the above, new designs include the addition of anoxic tanks as well as secondary anoxic tanks, to reduce the nitrates in the effluent. Anoxic recycle ensure nitrogen removal in the system and is today part of most designs. The final contact tank is a chlorine contact tank, which finally treats the liquor to produce an effluent in accordance with the General Limits in terms of the South African Water Act, Standard suitable for discharge into rivers or for use as irrigation.
Other disinfection system are available on request.
The FAMSYSTEM FMP process is designed for individual applications to ensure that all aspects of the application are fully taken into consideration. For South African dams and rivers feeding directly into dams, the Department of Water Affairs requires the removal of nutrients including both nitrates and phosphates. Depending on the application, a biological system of nutrient removal or a chemical phosphate removal can be offered.
It is clear from the above that the process used in the FAMSYSTEM FMP plants is basic and simple and does not require special equipment or specialised operators. To ensure the complete plant offers the user a long-term viable alternative, the plant is manufactured using mainly fibreglass tanks. The fibreglass tank system uses a special resin system so that full corrosion resistance is guaranteed. The external surface is waxed and pigmented green for better UV resistance, allowing the installation of the plant above or below ground. Fibreglass ensures a plant life of over 25 years, as proven in practice.
As the plant, including the fibreglass tanks, is fully manufactured within the group, prices can be kept at a minimum. By using standard tanks and pre-assembly, costs of erection are also minimised.
The FAMSYSTEM FMP system offers a low cost, low maintenance, high efficiency solution to sewage problems for applications such as : police stations, hotels, resorts or smaller housing developments, toll plazas, forester stations and any other smaller development.
A long list of references is available on request.
Operation is done by the owner and full maintenance and monitoring programmes are available to ensure that constant qualified supervision exists to ensure the plant remains effective over the years. As over the years we have monitored a number of plants, we are able to confirm that the above results can be obtained as long as operation is done within the defined parameters.