Effect of biological treatment on halogenated organics in bleached kraft pulp mill effluents studied by molecular weight distribution analysis

1993 ◽  
Vol 27 (3) ◽  
pp. 547-557 ◽  
Author(s):  
Jouni K. Jokela ◽  
Minna Laine ◽  
Mats Ek ◽  
Mirja Salkinoja-Salonen
Keyword(s):  
Molecular Weight ◽  
Molecular Weight Distribution ◽  
Weight Distribution ◽  
Biological Treatment ◽  
Kraft Pulp ◽  
Pulp Mill ◽  
Distribution Analysis ◽  
Kraft Pulp Mill ◽  
Bleached Kraft Pulp ◽  
Pulp Mill Effluents

Characterization of thermophilic aerobic granular sludge for the treatment of bleached kraft pulp mill effluent

BioResources ◽  
2020 ◽  
Vol 15 (3) ◽  
pp. 7191-7206
Author(s):  
Rafles Anselmo da Mata ◽  
Ismarley Lage Horta Morais ◽  
Claudio Mudadu Silva
Keyword(s):  
Kraft Pulp ◽  
Pulp Mill ◽  
Granular Sludge ◽  
Average Diameter ◽  
Aerobic Granular Sludge ◽  
Pulp Mill Effluent ◽  
Kraft Pulp Mill ◽  
Bleached Kraft Pulp ◽  
Pulp Mill Effluents ◽  
Aerobic Sludge

The objective of this work was to evaluate the physical characteristics of the thermophilic granular aerobic sludge used in the treatment of bleached kraft pulp mill effluents. Four sequential batch reactors (SBRs) were operated with cycles of 12 hours. Reactor (R1-FSR) with flocculent sludge was used as control. The other three reactors (R2-GSR, R3-GSR+100, and R4-GSR+200) were operated with granular aerobic sludge. Concentrations 100 and 200 mg. L-1 of calcium were applied in the R3-GSR+100 and R4-GSR+200, respectively. The pH was maintained in the neutral range in all reactors. The experimental plan was carried out for 490-day period, in 5 phases at different temperatures of 35 °C to 55 ºC. All SBRs showed COD removal efficiency above 60% in all temperature ranges. The granule average diameter in the R2-GSR, R3-GSR+100, and R4-GSR+200 ranged from 5 to 8 mm. The reactor R3-GS+100 showed better stability due to the addition of 100 mg. L-1 of calcium. The granular sludge sedimentation velocity was 40 m.h-¹, which was eight times higher than the flocculent sludge. Thermophilic treatment (55 °C) using aerobic granular sludge proved to be a promising way for treating bleached kraft pulp mill effluent without a prior cooling process.

Biological treatment of the effluent from a bleached kraft pulp mill using basidiomycete and zygomycete fungi

2009 ◽  
Vol 407 (10) ◽  
pp. 3282-3289 ◽  
Author(s):  
A.C. Freitas ◽  
F. Ferreira ◽  
A.M. Costa ◽  
R. Pereira ◽  
S.C. Antunes ◽  
...  
Keyword(s):  
Biological Treatment ◽  
Kraft Pulp ◽  
Pulp Mill ◽  
Kraft Pulp Mill ◽  
Bleached Kraft Pulp
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