Honey extraction is the central process in beekeeping of removing honey from honeycomb so that it is isolated in a pure liquid form Normally, the honey is stored by honey bees in their beeswax honeycomb; in framed bee hives, the honey is stored on a wooden structure called a frame. The honey frames are typically harvested in late summer when they are most filled with honey. On a fully filled frame, the cells will be capped over by the bees for storage, meaning each cell containing honey will be sealed with a capping made of beeswax.
Centrifugal extraction This is widely used, especially by commercial beekeepers. Most centrifugal extractors are not suitable for natural combs. This form of extraction is therefore closely associated with vertical hives, which since the mid 1800s has been the most common variety of hive, and are normally furnished with frames including artificial support. Significant labour is required to disassemble the hives and process the honey, then clear up the mess, so it is usual to extract honey from each hive only once a year. The first step in the extraction process is to break or remove all of the cappings. This may be accomplished using an automated uncapper machine or with a manually operated uncapping knife. Usually, these tools are used together, along with a pronged cappings fork. To facilitate cutting off these wax cappings, the knife is often heated. The removed bits of wax, called cappings, are rich in honey which can be slowly drained off with the help of some heating. This 'cappings wax' is very valuable and often used to make candles or other products. Automated uncapping machines normally work by abrading the surface of the wax with moving chains or bristles or hot knives. This, while messy, makes the process easier than doing this task manually. Some beekeepers will also harvest (before uncapping the honey) the propolis, a resinous material bees gather to glue the frames together; propolis is used for its supposed medicinal properties. Once uncapped, the frames are then placed in a honey extractor, which spins them so that most of the honey is removed by centrifugal force. Care must be taken to ensure that all frames are loaded correctly, as the comb is angled slightly upwards to prevent the honey flowing out; if loaded incorrectly, this can also prevent the honey flowing out during extraction. Once extracted, the resulting honey will contain bits of wax and must be passed through a screen so that clean liquid honey results. Any honey that cannot be harvested, which includes crystallized honey left on the frames after extraction, or honey that is not capped over, and therefore unripened, is usually placed back into the colonies for the bees to clean up. Some beekeepers place wet frames outside so that it will be reclaimed by the bees. This must be done early in the morning or late in the evening as the bees will aggressively harvest such a rich source. Care must be taken so that this is done at a time when food is not scarce, or else bees from differing colonies will fight over the honey. In addition, this can spread disease from contaminated frames and can be a potential problem; this technique is not advised. The extraction process is typically done inside a specialized room, or honey house, that can be heated (since hot honey will flow faster), with all of the necessary tools nearby and is washable. The room must be well sealed, as bees (and other insects) will eagerly try to enter and gather the honey. It is important to remember that honey is a food product. The table below outlines the extraction process.
Crush and drain This method is usual for natural comb without artificial support. Such combs are associated with top-bar hives, especially horizontal hives which allow for continuous harvest through the season.
Once the combs are removed from the hive, they can be processed in several ways:
Encase them in a cage and use a suitable centrifugal extractor as with framed combs. This was done in the early twentieth century. Preserving as-is to be consumed in comb form. Crushing the combs, straining the honey, and processing the beeswax.
Flow frames Flow frames consist of plastic honeycomb lattice. Bees fill in the vertical gaps with beeswax and the cells with honey. When the combs are full of ripe honey, the mechanism of the frames is activated, the vertical gaps are moved to offset by one half of a cell. This breaks the wax seal and allows the honey to flow down through the cells into a channel at the base of each frame and out into a collection vessel. The bees normally show no sign of disturbance, and any bees in the flow frame at the time are not harmed. Clean honey can be produced and filtration is not normally required. The system is then reset and the bees clean up any remaining honey, remove the capping, and refill the cells, beginning the process again. Each colony that is to use flow frame extraction must be furnished with flow frames, and their cost limits their appeal to existing commercial apiarists. However, new entrants to small beekeeping may find that the greater cost per hive of flow frames is more than off-set by saving time, labour, space, mess, and disturbance to the bees. Expensive extraction equipment (centrifuge, filters, working and storage space) is not required.
References
Sammataro, D.; Avitabile, A. (2011). The Beekeeper's Handbook (4 ed.). Ithaca, NY: Cornell University Press.
