Question: An integrated pulp and paper mill produces two paper grades (SC paper, LWC paper) and pulp at the mill site. Table 1 shows daily demands

 An integrated pulp and paper mill produces two paper grades (SC

An integrated pulp and paper mill produces two paper grades (SC paper, LWC paper) and pulp at the mill site. Table 1 shows daily demands of chemical and mechanical pulp Table 1. Daily demands of chemical and mechanical pulps Chemical pulp production Fibers Initial data Losses in bleaching 4% Losses in screening 1% Losses in O stage 3% Yield in cooking 46% Concentration of white liquor 121g/l (active alkali Na2S ) Feed of white liquor 16% ( Na2S of dry wood) Density of white liquor 1.17t/m3 (total solution) Dry solids content of white liquor 0.17t/t (total solution) Chemicals in O stage 20kg/tds pulp Water formation 11kg/tds wood chips Turpentine 4kg/tdg wood chips Losses in black liquor washing 3.0% Calculate how much white liquor (total) is needed per day in m3 Calculate how much black liquor is formed in the process in unit tds /d

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