Pretreatment of recycled paper sludge with a novel high-velocity pilot cyclone: Effect of process parameters on convective drying efficiency

Mikko Mäkelä; Paul Geladi; Sylvia H. Larsson; Michael Finell

doi:10.1016/j.apenergy.2014.06.057

Pretreatment of recycled paper sludge with a novel high-velocity pilot cyclone: Effect of process parameters on convective drying efficiency

Mikko Mäkelä^*, Paul Geladi, Sylvia H. Larsson, Michael Finell

^*Corresponding author for this work

Not published at VTT

Swedish University of Agricultural Sciences

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

15 Citations (Scopus)

Abstract

To address the growing need for economically viable sludge processing technologies and associated resource recovery, a novel convective high-velocity pilot cyclone was set-up at the Swedish University of Agricultural Sciences in Umeå, Sweden. In essence this process entails feeding (≤900kgh^-1) a material to a heated high-velocity air flow (approx. 13×10³m³h^-1) allowing moisture removal at low temperatures. This equipment is expected to improve drying of challenging industrial sludge materials when used as a pretreatment method prior to further processing. Modeling results based on an experimental campaign on recycled paper mill sludge indicated that efficient drying with a specific energy consumption of ≤1-1.2kWhkg^-1H₂O can be achieved with inlet air temperature levels ≥40°C coupled with respective feeding capacity of ≤750kgh^-1.

Original language	English
Pages (from-to)	490-498
Journal	Applied Energy
Volume	131
DOIs	https://doi.org/10.1016/j.apenergy.2014.06.057
Publication status	Published - 15 Oct 2014
MoE publication type	A1 Journal article-refereed

Funding

The contributions of Markus Segerström, Gunnar Kalén and Carina Jonsson from the Swedish University of Agricultural Sciences to actual experiments and laboratory analyses are greatly acknowledged. This work was performed with support from SCA Obbola AB and Airgrinder AB with partial funding from Ekokem Oy AB, the Processum Biorefinery Initiative AB and the research environment Bio4Energy.

Keywords

Biosolids
Cyclone
Experimental design
Optimization
Regression modeling
Sludge handling

Access to Document

10.1016/j.apenergy.2014.06.057

Cite this

@article{444bdc4665d24f59aebfb99b3fdaa288,

title = "Pretreatment of recycled paper sludge with a novel high-velocity pilot cyclone: Effect of process parameters on convective drying efficiency",

abstract = "To address the growing need for economically viable sludge processing technologies and associated resource recovery, a novel convective high-velocity pilot cyclone was set-up at the Swedish University of Agricultural Sciences in Ume{\aa}, Sweden. In essence this process entails feeding (≤900kgh-1) a material to a heated high-velocity air flow (approx. 13×103m3h-1) allowing moisture removal at low temperatures. This equipment is expected to improve drying of challenging industrial sludge materials when used as a pretreatment method prior to further processing. Modeling results based on an experimental campaign on recycled paper mill sludge indicated that efficient drying with a specific energy consumption of ≤1-1.2kWhkg-1H2O can be achieved with inlet air temperature levels ≥40°C coupled with respective feeding capacity of ≤750kgh-1.",

keywords = "Biosolids, Cyclone, Experimental design, Optimization, Regression modeling, Sludge handling",

author = "Mikko M{\"a}kel{\"a} and Paul Geladi and Larsson, {Sylvia H.} and Michael Finell",

note = "Funding Information: The contributions of Markus Segerstr{\"o}m, Gunnar Kal{\'e}n and Carina Jonsson from the Swedish University of Agricultural Sciences to actual experiments and laboratory analyses are greatly acknowledged. This work was performed with support from SCA Obbola AB and Airgrinder AB with partial funding from Ekokem Oy AB, the Processum Biorefinery Initiative AB and the research environment Bio4Energy.",

year = "2014",

month = oct,

day = "15",

doi = "10.1016/j.apenergy.2014.06.057",

language = "English",

volume = "131",

pages = "490--498",

journal = "Applied Energy",

issn = "0306-2619",

publisher = "Elsevier",

}

TY - JOUR

T1 - Pretreatment of recycled paper sludge with a novel high-velocity pilot cyclone

T2 - Effect of process parameters on convective drying efficiency

AU - Mäkelä, Mikko

AU - Geladi, Paul

AU - Larsson, Sylvia H.

AU - Finell, Michael

N1 - Funding Information: The contributions of Markus Segerström, Gunnar Kalén and Carina Jonsson from the Swedish University of Agricultural Sciences to actual experiments and laboratory analyses are greatly acknowledged. This work was performed with support from SCA Obbola AB and Airgrinder AB with partial funding from Ekokem Oy AB, the Processum Biorefinery Initiative AB and the research environment Bio4Energy.

PY - 2014/10/15

Y1 - 2014/10/15

N2 - To address the growing need for economically viable sludge processing technologies and associated resource recovery, a novel convective high-velocity pilot cyclone was set-up at the Swedish University of Agricultural Sciences in Umeå, Sweden. In essence this process entails feeding (≤900kgh-1) a material to a heated high-velocity air flow (approx. 13×103m3h-1) allowing moisture removal at low temperatures. This equipment is expected to improve drying of challenging industrial sludge materials when used as a pretreatment method prior to further processing. Modeling results based on an experimental campaign on recycled paper mill sludge indicated that efficient drying with a specific energy consumption of ≤1-1.2kWhkg-1H2O can be achieved with inlet air temperature levels ≥40°C coupled with respective feeding capacity of ≤750kgh-1.

AB - To address the growing need for economically viable sludge processing technologies and associated resource recovery, a novel convective high-velocity pilot cyclone was set-up at the Swedish University of Agricultural Sciences in Umeå, Sweden. In essence this process entails feeding (≤900kgh-1) a material to a heated high-velocity air flow (approx. 13×103m3h-1) allowing moisture removal at low temperatures. This equipment is expected to improve drying of challenging industrial sludge materials when used as a pretreatment method prior to further processing. Modeling results based on an experimental campaign on recycled paper mill sludge indicated that efficient drying with a specific energy consumption of ≤1-1.2kWhkg-1H2O can be achieved with inlet air temperature levels ≥40°C coupled with respective feeding capacity of ≤750kgh-1.

KW - Biosolids

KW - Cyclone

KW - Experimental design

KW - Optimization

KW - Regression modeling

KW - Sludge handling

UR - http://www.scopus.com/inward/record.url?scp=84904343105&partnerID=8YFLogxK

U2 - 10.1016/j.apenergy.2014.06.057

DO - 10.1016/j.apenergy.2014.06.057

M3 - Article

AN - SCOPUS:84904343105

SN - 0306-2619

VL - 131

SP - 490

EP - 498

JO - Applied Energy

JF - Applied Energy

ER -

Pretreatment of recycled paper sludge with a novel high-velocity pilot cyclone: Effect of process parameters on convective drying efficiency

Abstract

Funding

Keywords

Access to Document

Other files and links

Fingerprint

Cite this