Seed-cotton trash

Cylinder cleaners are an Important type of seed-cotton cleaner. They remove small trash (16, 28) and operate by scrubbing seed-cotton against a grid-bar grate (inclined cleaner) or by the interaction of an upper and lower set of cylinders (Impact cleaner). Cylinder cleaners are well described in the Cotton Glnners Handbook (29). 

Seed-cotton loss in overhead cleaning equipment can range from 0.2 percent upward (28) but should not be over 1.0 percent. The amount of overhead cleaning machinery needed depends on the trash content of incoming seed cotton. Stripper-harvested cotton with over 30 percent trash can benefit from three extractor stages in addition to the two cylinder stages normally used. 

The successful operation of this system demonstrated the potential for heat recovery from incineration of cotton gin trash. At a 30% recovery ratio, enough heat can be recovered from the incineration process to supply most of the energy required for seed cotton drying, even in low-capacity gins (Table IX). Only the size and volume of the ginning operation will dictate whether such recovery will be economically feasible. 

Mechanically harvested cotton, either with cotton picker machines (cotton burr remains attached to the stalk) or with stripper machines (cotton burr is removed along with the seed cotton), can contain more trash and other irregularities than hand-harvested cotton. However, according to Cotton contamination surveys by the International Textile Manufactures Federation (ITMF), the most contaminated cottons originate from some of the countries where cotton is hand-picked, whereas some of the cleanest can be sourced in the USA where cotton is machine harvested [34]. Most of the mechanically harvested cotton is harvested with cotton pickers ( 75% in the United States and all in Australia). 

In Sudan [607], cotton is classified twice, as seed cotton before the gin and as lint at the port of shipment. The handpicked cotton is piled up on covers where trash and other contaminants are removed. Grades are assigned to the piles and the graded cotton is transported to the gin. The field classification system is felt to be key to implementing quality control measures such as timely and early picking, which can reduce stickiness. The ginned cotton is baled and transported to Port Sudan where the lint is reclassified and samples are taken for fiber testing. 

As the cotton becomes poorer in quality, the gram-negative bacterial counts and the endotoxin levels increase markedly in the raw cotton, the hand cleaned fiber, and the leaf-like trash and seed trash that were removed from it (16). Tinged grades of cotton reach gram-negative microorganism counts of at least 150-160 million cfu/g. 

Localization of GNB on Botanical Trash and Fiber. Leaflike, bark, and seed trash materials > 50 pm were removed by hand from light spotted 1976 raw cottons grown in West Texas. These botanical trash materials plus the lint minus gross trash and samples of the original raw cottons were analyzed for content of entrained... 

ANN has made its presence felt in all related aspeets in textile from the fiber cultivation to garment manufacturing. Pattern recognition is one of the areas where ANN has played a significant role. Attempts have been made to identify fibers as well as trash using neural networks and NIR spectrophotometry. Even the animal fibers, merino and mohair have been recognized and classified by She et al. [2]. Cotton colors are also classified based on chromatic differences by the use of neural network. Classification of trash, such as leaf, bark and seed coat, the content of each of these trash particles is important in the sense to deeide the cleaning process. 

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