A case study for integrated forest biorefinery: Recovery of manool from evaporator condensate of a kraft pulp mill

2016 ◽  
Vol 165 ◽  
pp. 27-31 ◽  
Author(s):  
Guangwei Sun ◽  
Dan Zhang ◽  
Xingye An ◽  
Md Sarwar Jahan ◽  
Jinghui Zhou ◽  
...  
Keyword(s):  
Kraft Pulp ◽  
Pulp Mill ◽  
Kraft Pulp Mill

Treatment of real industrial wastewaters through nano-TiO2 and nano-Fe2O3 photocatalysis: case study of mining and kraft pulp mill effluents

2017 ◽  
Vol 39 (12) ◽  
pp. 1586-1596 ◽  
Author(s):  
V. Nogueira ◽  
I. Lopes ◽  
T. A. P. Rocha-Santos ◽  
F. Gonçalves ◽  
R. Pereira
Keyword(s):  
Kraft Pulp ◽  
Pulp Mill ◽  
Nano Tio2 ◽  
Industrial Wastewaters ◽  
Kraft Pulp Mill ◽  
Pulp Mill Effluents

Formation of pirssonite in green liquor handling systems

TAPPI Journal ◽  
2013 ◽  
Vol 12 (7) ◽  
pp. 33-41 ◽  
Author(s):  
TASNUVA ZAKIR ◽  
HONGHI TRAN ◽  
VLADIMIROS G. PAPANGELAKIS
Keyword(s):  
Sodium Carbonate ◽  
Kraft Pulp ◽  
Pulp Mill ◽  
Pulp Mills ◽  
Hard Scale ◽  
Kraft Pulp Mill ◽  
Green Liquor ◽  
Kraft Pulp Mills ◽  
Alkali Salts

The formation of pirssonite is commonly believed to be the cause of hard-scale buildup in green liquor handling systems in kraft pulp mills. The precipitation occurs when the concentration of sodium carbonate in the liquor exceeds the solubility of pirssonite. A laboratory study was conducted to systematically determine the causticizing conditions under which pirssonite precipitates. The results confirmed literature data showing that the solubility of pirssonite increases with temperature but decreases with increased concentrations of sodium carbonate and other sodium salts present in the green liquor. The solubility data obtained were used to create a database for pirssonite formation in OLI, a thermodynamic program for predicting phase stabilities of alkali salts in aqueous solutions. The OLI program, with the newly created database, was subsequently used to generate a series of pirssonite solubility curves in terms of saturated total titratable alkali that can be used as operational guidelines to prevent pirssonite precipitation and hard-scale formation in green liquor handling systems. A case study was performed using these solubility curves to explain the occurrence of the pirssonite deposition problem at a kraft pulp mill.

Treatment of hazardous organic and inorganic compounds through nano-TiO2 and nano-Fe2O3 photocatalysis: case study in a mining effluent and kraft pulp mill effluent

2014 ◽  
Vol 229 ◽  
pp. S202 ◽  
Author(s):  
InêsVerónica Nogueira ◽  
Isabel Lopes ◽  
Teresa Rocha-Santos ◽  
Fernando Gonçalves ◽  
Armando Duarte ◽  
...  
Keyword(s):  
Kraft Pulp ◽  
Inorganic Compounds ◽  
Pulp Mill ◽  
Pulp Mill Effluent ◽  
Nano Tio2 ◽  
Kraft Pulp Mill ◽  
Mining Effluent

Formation and degradation of mutagens in kraft pulp mill water systems

1990 ◽  
Vol 5 (3) ◽  
pp. 142-147 ◽  
Author(s):  
Annika Smeds ◽  
Bjarne Holmbom ◽  
Åbo Akademi ◽  
Leena Tikkanen
Keyword(s):  
Kraft Pulp ◽  
Pulp Mill ◽  
Water Systems ◽  
Kraft Pulp Mill

Occurrence of Various Off-Flavours in Fish in Finland from 1969 to 1981

1983 ◽  
Vol 15 (6-7) ◽  
pp. 47-58 ◽  
Author(s):  
T Kuusi ◽  
M Suihko
Keyword(s):  
Research Laboratory ◽  
Kraft Pulp ◽  
Pulp Mill ◽  
Northern Pike ◽  
Research Centre ◽  
Pulp Mill Effluent ◽  
Technical Research ◽  
Kraft Pulp Mill ◽  
Food Research ◽  
Numerical Scale

Off-flavours in fish were studied from 1969 to 1981 at the Food Research Laboratory of the Technical Research Centre of Finland using sensory methods. In all, 1982 samples of 18 species of Finnish fish, most of them suspected of being tainted, were studied. A trained taste panel scoring on a numerical scale of 0-10, where a score of 5 or less was unacceptable, was used. The off-flavours described were oil, kraft pulp mill effluent, sewage (musty), muddy, rancid, and others. Of all these samples, 34.9% were unacceptable. The most common off-flavour was kraft pulp mill effluent, present in 41.2 % of the unacceptable samples. In acceptable fish slight off-flavours were somet imes found. Of the muddy fish, only 35.2 % of the bream and 28.8 % of the northern pike were unacceptable. The panel was able to discriminate between the different off-flavours, but, in some cases, the boundaries were vague.

Characterization of odorous compounds from bleached kraft pulp mill effluent

1995 ◽  
Vol 31 (11) ◽  
pp. 35-40 ◽  
Author(s):  
B. G. Brownlee ◽  
S. L. Kenefick ◽  
G. A. MacInnis ◽  
S. E. Hrudey
Keyword(s):  
Gas Chromatography ◽  
Kraft Pulp ◽  
Pulp Mill ◽  
Dimethyl Disulfide ◽  
Gas Chromatography Mass Spectrometry ◽  
Pulp Mill Effluent ◽  
Kraft Pulp Mill ◽  
Bleached Kraft Pulp ◽  
Methyl Phenyl Sulfide ◽  
Library Spectrum

Odour compounds in extracts of bleached kraft pulp mill effluent (BKME) have been characterized by olfactory gas chromatography (OGC) and gas chromatography-mass spectrometry. A variety of sulfury odours was detected by OGC in addition to woody and pulp mill-like odours. Three sulfur compounds were identified by comparison of retention times and partial mass spectra with authentic standards: dimethyl disulfide, 3-methylthiophene and thioanisole (methyl phenyl sulfide). Typical concentrations in BKME were 1, 0.05, and 0.5 μg/l, respectively. Their odour intensity is relatively low and they were not detected by OGC. Dimethyl trisulfide was tentatively identified by comparison of its partial mass spectrum with a literature (library) spectrum. Its concentration in BKME was estimated at 0.5-2 μg/l. It corresponded to a skunky odour in the OGC profiles. Efforts to identify another odour peak, eluting just after 3-methylthiophene, with a pronounced alkyl sulfide odour were unsuccessful.

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