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Aerobic moving bed biofilm reactor treating thermomechanical pulping whitewater under thermophilic conditions

Research output: Contribution to journalArticleScientificpeer-review

Details

Original languageEnglish
Pages (from-to)1067-1075
Number of pages9
JournalWater Research
Volume36
Issue number4
DOIs
Publication statusPublished - 2002
Externally publishedYes
Publication typeA1 Journal article-refereed

Abstract

The continuously operated laboratory scale Kaldnes moving bed biofilm reactor (MBBR) was used for thermophilic (55°C) aerobic treatment of TMP whitewater. In the MBBR, the biomass is grown on carrier elements that move along with the water in the reactor. Inoculation with mesophilic activated sludge gave 60-65% SCOD removal from the first day onwards. During the 107 days of experiment, the 60-65% SCOD removals were achieved at organic loading rates of 2.5-3.5kg SCODm-3d-1, the highest loading rates applied during the run and HRT of 13-22h. Carbohydrates, which contributed to 50-60% of the influent SCOD, were removed by 90-95%, while less than 15% of the lignin-like material (30-35% of SCODin) was removed. The sludge yield was 0.23g VSSg SCODremoved -1. The results show that the aerobic biofilm process can be successfully operated under thermophilic conditions.

ASJC Scopus subject areas

Keywords

  • Aerobic, Biofilm, Moving bed biofilm reactor, Thermomechanical pulping whitewater, Thermophilic