Organizing co mmittee

WASTE COTTON PLANT CAN BE ALTERNATIVE 
FEEDSTOCK FOR VALUATED PRODUCTS 
 
B. B. Abduazimov, R.M. Khalilov 
 
S.Yu. Yunusov Institute of the Chemistry of Plant Substances Academy of sciences of the 
Republic of Uzbekistan st. Mirzo-Ulugbek, 77, 100170 Tashkent 
 
The sustainability of agricultural and rural waste management is very important for 
most developing countries. The unsustainable nature of rural waste leads to 
environmental pollution and can eventually lead to the complete depletion of natural 
resources. Agricultural waste is recognized as having a "hidden" economic value. 
Uzbekistan is the seventh largest global cotton producer and third largest cotton 
supplier for world markets. To make cotton cultivation more economical, it is necessary 
to achieve the maximum use of cotton by-products. Cotton seed husks, cotton stalks, 
cotton linters, cotton gin trash (CGT), are the main important by-products of cotton 
cultivation. 
Cotton stalks. On average, from one hectare of land, from 2 to 3 tons of stems are 
formed. Most of the stem is treated as waste, although a small portion (15%) is used as 
fuel [1]. Most of the stems without removal are plowed and digs. This reduces the 
productivity and quality of plowing. In addition, plowing will enable cotton worms, 
fungi, wilt to complete their life cycle and remain in the soil, provoking plant diseases 
and harvest in next year. 
Cotton gin trash. Waste from ginning plants averages 10 to 25% of the harvested 
crop. Cotton gin trash, consist of small sticks, leaves, cottonseed, husks and burrs. 
Cotton gin waste generated during cotton processing is a cheap source of valuable 
lignocellulosic material. Cotton bolls are mostly accumulated during the last harvest. To 
find the best ways to process cotton waste, it was necessary to study the chemical 
composition and ratio in the waste collected from the fields and ginneries of the 
Tashkent region. 
Table 1. Ratio of lignocellulose constituents of cotton waste. 
The analysis of the obtained results indicates significant differences in the chemical 
composition of various cotton wastes. The increase quant of ash content in waste 
materials is caused by contamination. All cotton waste is rich in hemicelluloses, 
celluloses, lignins. The ginneries expenses can be offset by increasing new products 
from plant wastes. Cotton waste will be rational use to the production of cellulose, 
furfural, protein feed, ethanol, fertilizers and plant growth stimulants. This will bring 
economic and environmental prospects. 
Reference
1. Patil PG, Gurjar RM, Shaikh AJ, Balasubramanya RH, Paralikar KM, Varadarajan 
PV. Cotton Plant Stalk—An Alternative Raw Material to Board Industry. 2007. 
Cotton plant wastes 
Ash, % 
Lignin, 
% 
Hemicelluloses, %
Cellulose, %
CGT 
9.8 
22.4 
28.8 
37.7 
Cotton boll peels 
4.9 
21.9 
17.6 
38.2 
Cotton stalks 
5.4 
25.9 
21.2 
38.7 

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Poster presentation 
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