Worldwide Pulp and Paper Production -...

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

Overview subindustries

Kraft pulpSulphite pulpRecycled pulp&paperIntegrated pulp&paperTissueBoardSpecialty paperNewsprintPlywood etc

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

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

Bleached Kraft Pulping

Process CODkg/t pulp

Debarking 0 - 10Brownstock area 0 - 7Bleach plant 25 - 55Evaporation condensates 3 - 15Spills 3 - 8Total 31 - 95

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

Wastewater characteristicsImportant parameters

BODCODTOCTSSpHTemperatureNutrientsSpecific compounds (EDTA, chlorate, resins, etc)Other (calcium, etc)

MBBR

The NatrixTM MBBR process

The BASTM biological process

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

Sedimentation after 180 Seconds

BAS CONVENTIONAL

The LagoonGuard™process

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

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

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

Suzano Papel e Celulose, Mucuri Mill, BA