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An appraisal of the effect of biological treatment on the environmental quality of high-yield mechanical pulping effluents
Before biological treatment, the effluents from one CTMP (chemi-thermomechanical pulping) and three TMP (thermomechanical pulping) mills were acutely lethal to fathead minnows ( Pimephales promelas) and the water flea Ceriodaphnia with 48-h LC 50 values of 2.2 to > 50%. The effluents also caused...
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Published in: | Water research (Oxford) 1992, Vol.26 (11), p.1425-1432 |
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Main Authors: | , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | Before biological treatment, the effluents from one CTMP (chemi-thermomechanical pulping) and three TMP (thermomechanical pulping) mills were acutely lethal to fathead minnows (
Pimephales promelas) and the water flea
Ceriodaphnia with 48-h LC
50 values of 2.2 to > 50%. The effluents also caused chronic effects at concentrations of 0.01–5.3%. After biological treatment, effluents from the three TMP mills were not acutely lethal to either test species. Biotreated effluents from the CTMP mill were also not acutely lethal to minnows but were lethal to
Ceriodaphnia (48-h LC
50: 54–80%). The chronic effects of biotreated effluents occurred at concentrations of 47 to > 100% for fathead minnows and at 5–37% for
Ceriodaphnia. Biological treatment also reduced the levels of BOD (>80%), COD (>60%) and wood extractives (>99%). |
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ISSN: | 0043-1354 1879-2448 |
DOI: | 10.1016/0043-1354(92)90061-8 |