Studies on Biological Treatment of Mechanical Pulps (IX)
نویسندگان
چکیده
منابع مشابه
Mechanical-Biological Pre-Treatment
At present in Germany there are 61 plants for Mechanical(-Biological) Treatment (M(B)T) of residual wastes with a total capacity of about 6.4 million tons per year. They can be classified in four process concepts: material stream separation, mechanical-biological stabilization (with a biological drying process), mechanical-physical stabilization (with a thermal drying process) and mechanical(-b...
متن کاملEffect of Mechanical Treatment on Properties of Cellulose Nanofibrils Produced from Bleached Hardwood and Softwood Pulps
Bleached hardwood and softwood South African kraft pulps were passed through a commercially available micro grinder for varying number of passes and the properties of the resultant pulps were assessed periodically using microscopy, Fourier transform infrared spectroscopy (FTIR), X-ray crystallography (XRD) and Thermogravimetric analysis (TGA). The ultrastructural analysis of the pulp fibres rev...
متن کاملNeutral Sulfite Treatment of Lignocellulosic Pulps
Birch and eucalyptus kraft pulps were treated with sulfite solutions in neutral conditions (pH 7) at 170 °C for 60 min and at 190 °C for 180 min. The pulps were analyzed for kappa number, viscosity, carbohydrate composition, and optical properties. Additionally, UV resonance Raman (UVRR) spectroscopy was applied to collect information on the contents of hexenuronic acid (HexA), lignin, and its ...
متن کاملBiological response of pulps submitted to different capping materials.
Pulp capping is a procedure that comprises adequate protection of the pulp tissue exposed to the oral environment, aiming at the preservation of its vitality and functions. This study evaluated the response of the dental pulps of dog teeth to capping with mineral trioxide aggregate (MTA) or calcium hydroxide P.A. For that purpose, 37 teeth were divided into two groups, according to the capping ...
متن کاملON THE IMPORTANCE OF HYDROQUlNONE/ p -QUINONE REDOX SYSTEM IN THE PHOTOYELLOWING OF MECHANICAL PULPS
In the area of photoyellowing of mechanical pulps, recently obtained experimental evidence has shown that hydroquinone/p-quinone redox couple is present in lignin-rich mechanical pulps. It was also noted that compared to a control pulp the concentration of pquinones was significantly higher in a photoyellowed pulp. Under ambient conditions, upon exposure to light, the existent pulp hydroquinone...
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ژورنال
عنوان ژورنال: JAPAN TAPPI JOURNAL
سال: 1997
ISSN: 0022-815X,1881-1000
DOI: 10.2524/jtappij.51.1090