Anaerobic digestion of alkaline black liquor using an up‐flow anaerobic sludge blanket reactor
- 1 January 1993
- journal article
- research article
- Published by Wiley in Journal of Chemical Technology & Biotechnology
- Vol. 58 (1) , 89-93
- https://doi.org/10.1002/jctb.280580113
Abstract
The anaerobic digestion of alkaline black liquor from a cereal straw pulping mill was studied in batch (serum bottles) and continuous systems (up‐flow anaerobic sludge blanket reactor—UASB). The batch digestion studies confirmed that lignin and related compounds (LRC) in the alkaline black liquor were the main inhibitory substances and could not be decomposed by anaerobic bacteria. At organic loading rates of 5–10 kg COD m−3 day−1, the UASB reactor achieved 50–60% COD removal efficiencies. Gas production was 2–3 dm3 per dm3 of alkaline black liquor. Two different sludge types were examined in the reactor: granular and cluster‐like sludges. Sludge in a cluster, which involved many small granules and flocs, tended to form larger aggregates and possessed good settling ability.Keywords
This publication has 2 references indexed in Scilit:
- Induction of Granulation by Sulphonated‐Lignin and Calcium in an Upflow Anaerobic Sludge Bed ReactorJournal of Chemical Technology & Biotechnology, 1992
- Thermophilic Anaerobic Treatment of Sulfate-Rich Pulp and Paper Integrate Process WaterWater Science & Technology, 1991