. Cyclopedia of farm crops. Farm produce; Agriculture. WINE, CIDER AND VINEGAR 185 air. This surface is usually supplied by use of shavings, blocks of wood, cobs, strips of rattan, coal and the like. The generator must first be charged or infected with the proper kind of bacteria. This is generally done by pouring through it a culture of some desirable species. The organisms are deposited on the surfaces of the substratum employed and devolpe their zoogkea masses, so that the whole is covered with a layer of the slimy mother. In the perforated disk or false head are a large number of small hol
. Cyclopedia of farm crops. Farm produce; Agriculture. WINE, CIDER AND VINEGAR 185 air. This surface is usually supplied by use of shavings, blocks of wood, cobs, strips of rattan, coal and the like. The generator must first be charged or infected with the proper kind of bacteria. This is generally done by pouring through it a culture of some desirable species. The organisms are deposited on the surfaces of the substratum employed and devolpe their zoogkea masses, so that the whole is covered with a layer of the slimy mother. In the perforated disk or false head are a large number of small holes, each> generally provided with a piece of wicking or string, down which the alcoholic solution can trickle and thus be brought, in a thin layer, in con- tact with the bacteria. The alcoholic solu- tion is introduced into the space above the false head, either by a spout, tilting trough or "sparger," a set of revolving arms per- forated with holes from which the alco- holic solution is forced into the top of the generator. Below the false bottom is a row of holes through which air is admitted, and at the bottom a receptacle for the liquid which has passed through the generator. The of the alcohol within produces heat, and there is a constant updraught of air inside the generator from the holes below. Thus the solution which has been added is constantly coming in contact with fresh organisms and fresh air and oxidation is rapid. It is found practically that it requires about 1,000 liters of air to oxidize each 100 grams of alcohol. Great care has to be taken with the heating as well as the ventilation of a vinegar factory. Since so much heat of oxidation is produced within the generators where the action is taking place, it is necessary to regulate the surrounding tempera- ture so as not to get too high heat for the best bacterial activity. As the oxidation is usually not complete in a single generator, a vinegar factory is generally so arranged that th
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectagriculture, bookyear
