Efficiency evaluation of activated sludge treatments of wastewater from fiber board manufacturing |
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Authors: | M C Diez L Inostroza S Ramírez |
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Institution: | (1) Dpto. Ingeniería Química, Universidad de La Frontera Casilla, 54-D Temuco, Chile |
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Abstract: | Summary Wastewater from fiber board manufacture consisting in a mixture of Pinus radiata, Eucaliptus globulus and Laureliopsis phillipiana (tepa) (3:1:1) has been studied in laboratory scale activated sludge reactors with organic load rate range of 50–1700 gCOD/m3.d. A stable operation at high organic load rate with hydraulic retention time of one day was achieved. Purification efficiencies up to 90 % of COD removal could be achieved in an activated sludge treatment of fiber board wastewater working with 1 day HRT for wood log cooking wastewater and with 4 days HRT when glueing wastewater is added to the cooking wastewater treatment. Suspended solids, color and phenol concentration were negligible in the efluent of the activated sludge system. |
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