Browsing by Author "Gebretsadik Tilahun,"

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    Production of paperboard from waste paper
    (Wolkite University, 2020-05) Aleme Battery; Amarech Abebe; Atsede Birhanu; Emebet Getachew; Gebretsadik Tilahun,
    In this study paperboard produced from waste paper by using chemical pulping process the general step used in laboratory was raw material preparation, pulping process, washing, bleaching, molding and pressing and finally dried the sheet to obtain paper board. The experiment was conduct pulping process with NaOH chemical and without chemical; we can possible to observed the effect of chemical(NaOH) in pulp and final product. The effect of NaOH concentration on pulp yield and weight of paper board was studied. The result showed that first experiment pulping with NaOH at 900c temperature and 35 min was obtained 62%, 19%, and 256g/m2 of pulp yield, moisture content and weight of paper respectively and then pulping condition without chemical at 900c temperature and 60min 64%,16% and 216g/m2 of pulp yield, moisture content and weight of paper respectively. In order to design and sizing of the basic equipment’s and to evaluate the economic feasibility of the process. From the result of the economic analysis net present value is positive This implies that, the study was feasible and profitable.