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25 November 2022
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Rice husk does not have substantial commercial value and generally present an environmental problem concerning its disposal. This investigation determines the suitability of producing cardboard from rice husk, thus, reducing the amount of pulping material required from virgin wood. Maceration process was used to produce cardboards from their pulps. For comparative evaluation, along with rice husk, bagasse and waste paper were used. The latter were blended in different ratios and their mechanical strength determined. Rice husk contained 15.2% lignin, 20.56% ash with kappa number of 99.48 while bagasse had 13.70% lignin and 2.23% ash with kappa number of 88.39. The maceration period of rice husk and bagasse was between 6 and 15 days and 5–10 days with the corresponding pulp yield of 40.44–46.55% and 46.01–36.76%, respectively. The average lignin content of rice husk pulp and bagasse …
