Wet oxidation of debarking water: changes in lignin content and biodegradability

被引：7

作者：

Kindsigo, M. ^{[1
]}

Kallas, J. ^{[1
]}

机构：

[1] Lappeenranta Univ Technol, Dept Chem Technol, Lappeenranta, Finland

来源：

ENVIRONMENTAL CHEMISTRY LETTERS | 2009年 / 7卷 / 02期

关键词：

Debarking water; Wet oxidation; Lignin; Biodegradability; Process optimization; THERMOMECHANICAL PULP; CIRCULATION WATERS;

D O I：

10.1007/s10311-008-0144-3

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The purpose of the research was to estimate optimal conditions for wet oxidation (WO) of debarking water from the paper industry. The WO experiments were performed at various temperatures, partial oxygen pressures and pHs. The experiments showed that lignin degradation and organics removal are affected remarkably by temperature and pH. At different WO conditions (pH 12, T 130-200A degrees C), 78-97% of lignin reduction was detected. pH value of 12 caused faster removal of tannins/lignin content; pH value of five was more effective for removal of total organics, represented by chemical oxygen demand (COD) and total organic carbon. The highest biodegradability [biological oxygen demand (BOD)/COD] of 0.72 was obtained at a pH of ten and temperature of 200A degrees C.

引用

页码：121 / 126

页数：6

共 11 条

[1] Comparison of catalyzed and noncatalyzed oxidation of azo dye and effect on biodegradability [J].

Donlagic, J ;

Levec, J .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 1998, 32 (09) :1294-1302

[2]

Eaton A.D., 1995, STANDARD METHOD 5000

[3] THE METHANOGENIC TOXICITY OF BARK TANNINS AND THE ANAEROBIC BIODEGRADABILITY OF WATER-SOLUBLE BARK MATTER [J].

FIELD, JA ;

LEYENDECKERS, MJH ;

ALVAREZ, RS ;

LETTINGA, G ;

HABETS, LHA .

WATER SCIENCE AND TECHNOLOGY, 1988, 20 (01) :219-240

[4]

Kindsigoa M., 2006, Proc. Estonian Acad. Sci. Chem, V55, P132

[5] Wet air oxidation: a review of process technologies and aspects in reactor design [J].

Kolaczkowski, ST ;

Plucinski, P ;

Beltran, FJ ;

Rivas, FJ ;

McLurgh, DB .

CHEMICAL ENGINEERING JOURNAL, 1999, 73 (02) :143-160

[6]

KOLACZKOWSKI ST, 1997, T ICHEME B, V75, P257

[7] Effects of ozone on resin acids in thermomechanical pulp and paper mill circulation waters [J].

Korhonen, S ;

Tuhkanen, T .

OZONE-SCIENCE & ENGINEERING, 2000, 22 (06) :575-584

[8] Ozonation and wet oxidation in the treatment of thermomechanical pulp (TMP) circulation waters [J].

Laari, A ;

Korhonen, S ;

Tuhkanen, T ;

Verenich, S ;

Kallas, J .

WATER SCIENCE AND TECHNOLOGY, 1999, 40 (11-12) :51-58

[9]

Saunamäki R, 1999, PULP PAP-CANADA, V100, P27

[10]

SUNDHOLM J, 1999, MECH PULPING PAPERMA, P375

← 1 2 →