Hydrothermal carbonization of industrial mixed sludge from a pulp and paper mill

Mikko Mäkelä; Verónica Benavente; Andrés Fullana

doi:10.1016/j.biortech.2015.10.062

Hydrothermal carbonization of industrial mixed sludge from a pulp and paper mill

Mikko Mäkelä^*
, Verónica Benavente
, Andrés Fullana

^*Corresponding author for this work

Not published at VTT

Swedish University of Agricultural Sciences
University of Alicante

Research output: Contribution to journal › Article › Scientific › peer-review

85 Citations (Scopus)

Abstract

Mixed sludge from a pulp and paper mill was hydrothermally carbonized at 180-260°C for 0.5-5h 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.

Original language	English
Pages (from-to)	444-450
Journal	Bioresource Technology
Volume	200
DOIs	https://doi.org/10.1016/j.biortech.2015.10.062
Publication status	Published - 1 Jan 2016
MoE publication type	A1 Journal article-refereed

Funding

The contributions of Markus Segerström and Gunnar Kalén from the Swedish University of Agricultural Sciences in sample processing, and Maria Esperanza Iñiguez and Ana Belén Martínez from the University of Alicante in material analyses are deeply appreciated. This work was performed in cooperation with SCA Obbola AB with partial funding from SP Processum AB .

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy
SDG 9 Industry, Innovation, and Infrastructure

Keywords

Biosolids
Hydrothermal treatment
Sludge treatment
Waste biomass
Wet torrefaction

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10.1016/j.biortech.2015.10.062

Cite this

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title = "Hydrothermal carbonization of industrial mixed sludge from a pulp and paper mill",

abstract = "Mixed sludge from a pulp and paper mill was hydrothermally carbonized at 180-260°C for 0.5-5h 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.",

keywords = "Biosolids, Hydrothermal treatment, Sludge treatment, Waste biomass, Wet torrefaction",

author = "Mikko M{\"a}kel{\"a} and Ver{\'o}nica Benavente and Andr{\'e}s Fullana",

note = "Funding Information: The contributions of Markus Segerstr{\"o}m and Gunnar Kal{\'e}n from the Swedish University of Agricultural Sciences in sample processing, and Maria Esperanza I{\~n}iguez and Ana Bel{\'e}n Mart{\'i}nez from the University of Alicante in material analyses are deeply appreciated. This work was performed in cooperation with SCA Obbola AB with partial funding from SP Processum AB . Publisher Copyright: {\textcopyright} 2015 Elsevier Ltd.",

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doi = "10.1016/j.biortech.2015.10.062",

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AU - Mäkelä, Mikko

AU - Benavente, Verónica

AU - Fullana, Andrés

N1 - Funding Information: The contributions of Markus Segerström and Gunnar Kalén from the Swedish University of Agricultural Sciences in sample processing, and Maria Esperanza Iñiguez and Ana Belén Martínez from the University of Alicante in material analyses are deeply appreciated. This work was performed in cooperation with SCA Obbola AB with partial funding from SP Processum AB . Publisher Copyright: © 2015 Elsevier Ltd.

PY - 2016/1/1

Y1 - 2016/1/1

N2 - Mixed sludge from a pulp and paper mill was hydrothermally carbonized at 180-260°C for 0.5-5h 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.

AB - Mixed sludge from a pulp and paper mill was hydrothermally carbonized at 180-260°C for 0.5-5h 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.

KW - Biosolids

KW - Hydrothermal treatment

KW - Sludge treatment

KW - Waste biomass

KW - Wet torrefaction

UR - https://www.scopus.com/pages/publications/84945265505

U2 - 10.1016/j.biortech.2015.10.062

DO - 10.1016/j.biortech.2015.10.062

M3 - Article

C2 - 26519695

AN - SCOPUS:84945265505

SN - 0960-8524

VL - 200

SP - 444

EP - 450

JO - Bioresource Technology

JF - Bioresource Technology

ER -

Hydrothermal carbonization of industrial mixed sludge from a pulp and paper mill

Abstract

Funding

UN SDGs

Keywords

Access to Document

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