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Spruce pulp treatment with an esterase from Ophiostoma piceae significantly decreases the content of both triglycerides and sterol esters responsible for pitch deposits

AuthorsCalero-Rueda, Olga; Gutiérrez Suárez, Ana ; Río Andrade, José Carlos del ; Martínez, Ángel T. ; Martínez, María Jesús
Sterol esters
Pitch deposits
Issue Date26-Aug-2002
Citation7th European Workshop on Lignocellulosics and Pulp, Turku/Abo, Finland, pp. 405-408.
AbstractAn esterase has been isolated from the ascomycete Ophiostoma piceae showing high affinity (Km around 1 mM) and activity on both glycerol and sterol esters of long chain fatty acids (kcat around 290 s-1 for triolein and 138 s-1 for cholesteryl oleate). This enzyme could have high potential for the enzymatic control of pitch in paper pulp manufacturing from different raw materials. Northern spruce (Picea abies) pulp containing triglycerides and sterol esters as the main lipophilic compounds, was treated with the O. piceae esterase (a control with boiled enzyme was included). The treated pulps were lyophilized, Soxhlet extracted with acetone, and the chloroform soluble compounds analyzed by gas chromatography-mass spectrometry. After 3-h treatment, 87% of triglycerides and 46% of sterols esters in the spruce pulp were degraded by the O. piceae esterase. These results suggest that O. piceae esterase could be used for pitch biocontrol in both hardwood and softwood paper pulp manufacturing
Appears in Collections:(IRNAS) Comunicaciones congresos
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