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Worldwide Pulp and Paper Production
PRODUCTION? 182 million ton pulp per year ? 330 million ton paper per year
WASTEWATER TO TREATMENT? About 30-35 billion m3 wastewater generated per
year? About 25-30 million ton COD generated per year
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Overview subindustries
Kraft pulpSulphite pulpRecycled pulp&paperIntegrated pulp&paperTissueBoardSpecialty paperNewsprintPlywood etc
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Pulping and Paper Mills
Market pulp mills
Pulp production
Pulp production
Pulp to free market orTo own paper mills
Raw material
Integrated millsPulp
productionPulp
productionRaw material Paper
productionPaper
production
Pulp
Non-integrated paper millsPaper
productionPaper
productionDeinkingDeinking
Raw materialPulp
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Typical characteristics
Biodegradability? from 50 % to > 95 %
Concentrations of COD? from 100 mg/l to 50 000
mg/lConcentrations of SS? from 0 mg/l to > 5 000 mg/
Temperature? from 20 °C to 90°C
pH? From 2 to 10
Low concentrations of nutrients
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Bleached Kraft Pulping
Process CODkg/t pulp
Debarking 0 - 10Brownstock area 0 - 7Bleach plant 25 - 55Evaporation condensates 3 - 15Spills 3 - 8Total 31 - 95
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Mechanical Pulping Discharges
Process COD BODkg/Adt kg/Adt
SGW 30-40 10-12PGW 40-50 12-16TMP 50-80 15-25CTMP 60-100 20-35BCTMP (H2O2) 80-140 30-50
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Wastewater characteristicsImportant parameters
BODCODTOCTSSpHTemperatureNutrientsSpecific compounds (EDTA, chlorate, resins, etc)Other (calcium, etc)
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MBBR
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The NatrixTM MBBR process
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The BASTM biological process
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ADVANTAGES OF BAS PROCESS
Ecellent settling properties 50-80 ml/g ( conventional plants 100 – 250)
No pulking problems, no filament bacteria Very stable process under big loading variationsLow biosludge production 0,12 kg/ kg COD red. ( Conventional 0, 25 kg/ kg COD red)Small foot print,volume 50% of conventional Low energy consumption / high basins Easy to upgrage existing plants
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Sedimentation after 180 Seconds
BAS CONVENTIONAL
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The LagoonGuard™process
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Kraft pulp? Södra Cell, Värö mill, Sweden? Zellstoff Stendal, Germany? CMPC Santa Fe, Chile? Suzano Bahia Sul, Brazil? Arkhangelsk Pulp and Paper,
RussiaTMP and newsprint? Stora Enso Hylte, Sweden? Stora Enso Kvarnsveden, Sweden? Stora Enso Anjala, Finland? Norske Skog Boyer, Australia
Reference projects, selected
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CTMP? Quesnel River Pulp, Canada? Waggeryd Cell, Sweden
Plywood and MDF board? UPM Schauman, Finland? UPM Chudovo, Russia? Norbord, Scotland
Tissue? SCA Edet mill, Sweden? Metsä Tissue Katrinefors, Sweden? Metsä Tissue Nyboholm, Sweden
Reference projects
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Sulphite pulp and paper? Nordic Paper, Sweden? AO Kondopoga, Russia
Fine Paper? Fraser Paper, USA? Arjowiggins Charavines, France? Munkedal, Sweden
Recycled pulp &paper? Asia kraft, Thailand? United Paper Board, Malaysia? Greenfield, France
Reference projects
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Suzano Papel e Celulose, Mucuri Mill, BA
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