Impact of fly ash pretreatment on aerobic treatment of thermomechanical pulping spent liquor

Biotechnology Progress
Xiaoqian ChenPedram Fatehi

Abstract

This study investigated the impact of biomass-based fly ash (FA) pretreatment on the biodegradability of a thermomechanical pulping spent liquor (TMPL) in an aerobic system. In this study, FA was mixed with TMPL under the conditions of 6 wt.% based on TMPL, 25°C and 10 h, which removed a part of recalcitrant organic materials and resulted in 68.0, 40.0, 60.1, 81.2 and 48.3% reductions in chemical oxygen demand (COD), biochemical oxygen demand (BOD), total organic carbon (TOC), lignin and sugar, respectively. FA-pretreated TMPL pressate (FA-TMPL) was biologically treated in an aerobic system of sequencing batch reactor (SBR). The performance of the biological treatment with and without FA pretreatment was studied in two parallel SBRs over three months. The combination of FA and biological treatments removed 97.3% of COD, 98.3% of BOD, 96.3% of lignin, 99.5% of sugar, and 98.1% of TOC. Without FA pretreatment, the biological system removed 87.3% of COD, 89% of BOD, 81.6% of lignin, 98.6% of sugars, and 90.5% of TOC. The results also confirmed that the settling ability of sludge, which was indicated as a sludge volume index, was reduced from 109.3 mL/g to 53.5 mL/g. In addition, the advantages of using FA pretreatment in aerobic s...Continue Reading

References

May 2, 2001·Environmental Technology·A B AlvaresS A Parsons
Feb 16, 2002·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Dae-Hee AhnWon-Seok Chang
Jul 18, 2003·Water Research·Britt-Marie WilénPaul Lant
Apr 15, 2004·Ultrasonics Sonochemistry·Preeti C Sangave, Aniruddha B Pandit
Sep 15, 2004·The Science of the Total Environment·D Pokhrel, T Viraraghavan
Mar 15, 2006·Journal of Hazardous Materials·Shaobin Wang, Hongwei Wu
Jun 22, 2012·Bioresource Technology·Sheng ZhangYuxuan Zhang
Feb 2, 2013·Bioresource Technology·Pedram FatehiYonghao Ni
Aug 26, 2014·Environmental Technology·Farshad Oveissi, Pedram Fatehi

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