Pulper
Encyclopedia
In agriculture, a pulper is a machine designed to remove pulp i.e. the soft flesh from agricultural
produce. For example, in coffee
growing the ripe, red cherries
are picked from the coffee bushes and prior to fermentation
and later drying the soft pulp needs to be removed (otherwise a potentially uncontrollable fermentation/rot will occur). In the case of coffee the pulping is normally done in a pulper that is either hand-cranked or engine-driven; the beans are emptied into an elevated hopper and then dropped through a narrow slot within which they come into contact with a rotating spiked drum that removes the pulp or flesh. Again in the case of coffee, the sticky beans that result from this process then have to be washed, fermented, washed again and dried prior to further processing (milling to remove the parchment
) and then roasting.
In the wood-processing industry connected to paper
-making, a pulper is a machine that mechanically and chemically processes the fibers of wood chips, or artificial non-woven fibers, to reduce them to pulp.
Post-consumer waste is re-pulped, in one of the processes involved in recycling
it.
Agriculture
Agriculture is the cultivation of animals, plants, fungi and other life forms for food, fiber, and other products used to sustain life. Agriculture was the key implement in the rise of sedentary human civilization, whereby farming of domesticated species created food surpluses that nurtured the...
produce. For example, in coffee
Coffee
Coffee is a brewed beverage with a dark,init brooo acidic flavor prepared from the roasted seeds of the coffee plant, colloquially called coffee beans. The beans are found in coffee cherries, which grow on trees cultivated in over 70 countries, primarily in equatorial Latin America, Southeast Asia,...
growing the ripe, red cherries
Cherry
The cherry is the fruit of many plants of the genus Prunus, and is a fleshy stone fruit. The cherry fruits of commerce are usually obtained from a limited number of species, including especially cultivars of the wild cherry, Prunus avium....
are picked from the coffee bushes and prior to fermentation
Fermentation (food)
Fermentation in food processing typically is the conversion of carbohydrates to alcohols and carbon dioxide or organic acids using yeasts, bacteria, or a combination thereof, under anaerobic conditions. Fermentation in simple terms is the chemical conversion of sugars into ethanol...
and later drying the soft pulp needs to be removed (otherwise a potentially uncontrollable fermentation/rot will occur). In the case of coffee the pulping is normally done in a pulper that is either hand-cranked or engine-driven; the beans are emptied into an elevated hopper and then dropped through a narrow slot within which they come into contact with a rotating spiked drum that removes the pulp or flesh. Again in the case of coffee, the sticky beans that result from this process then have to be washed, fermented, washed again and dried prior to further processing (milling to remove the parchment
Parchment
Parchment is a thin material made from calfskin, sheepskin or goatskin, often split. Its most common use was as a material for writing on, for documents, notes, or the pages of a book, codex or manuscript. It is distinct from leather in that parchment is limed but not tanned; therefore, it is very...
) and then roasting.
In the wood-processing industry connected to paper
Paper
Paper is a thin material mainly used for writing upon, printing upon, drawing or for packaging. It is produced by pressing together moist fibers, typically cellulose pulp derived from wood, rags or grasses, and drying them into flexible sheets....
-making, a pulper is a machine that mechanically and chemically processes the fibers of wood chips, or artificial non-woven fibers, to reduce them to pulp.
Post-consumer waste is re-pulped, in one of the processes involved in recycling
Recycling
Recycling is processing used materials into new products to prevent waste of potentially useful materials, reduce the consumption of fresh raw materials, reduce energy usage, reduce air pollution and water pollution by reducing the need for "conventional" waste disposal, and lower greenhouse...
it.