Sammanfattning

Mixed sludge from a pulp and paper mill was hydrothermally carbonized at 180-260 degrees C for 0.5-5 h with the use of HCl or NaOH for determining the effect of acid and base additions during sludge carbonization. Based on the results carbonization was mainly governed by dehydration, depolymerization and decarboxylation of sludge components. Additive type had a statistically significant effect on hydrochar carbon content and carbon and energy yield, of which especially energy yield increased through the use of HCl. The theoretical energy efficiencies of carbonization increased with decreasing reaction temperature, retention time and the use of HCl and suggested that the energy requirement could be covered by the energy content of attained hydrochar. The BOD5/COD-ratios of analyzed liquid samples indicated that the dissolved organic components could be treated by conventional biological methods. (C) 2015 Elsevier Ltd. All rights reserved.

Nyckelord

Biosolids; Hydrothermal treatment; Sludge treatment; Wet torrefaction; Waste biomass

Publicerad i

Bioresource Technology
2016, Volym: 200, sidor: 444-450

SLU författare

• Mäkelä, Mikko

  • Institutionen för skogens biomaterial och teknologi, Sveriges lantbruksuniversitet
    

Globala målen

SDG7 Säkerställa tillgång till ekonomiskt överkomlig, tillförlitlig, hållbar och modern energi för alla


UKÄ forskningsämne

Pappers-, massa- och fiberteknik
Kemiska processer


Publikationens identifierare

DOI: https://doi.org/10.1016/j.biortech.2015.10.062

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/68776