Biodrying of dewatered secondary sludge: behavior of dynamic respiration index (DRI) and energy release under different operating conditions

César Huiliñir; Estefanía Leiva; Francisco Stegmaier; Antonio Castillo; Luis Cottet; Silvio Montalvo

doi:10.1002/jctb.6210

Biodrying of dewatered secondary sludge: behavior of dynamic respiration index (DRI) and energy release under different operating conditions

César Huiliñir^*
, Estefanía Leiva
, Francisco Stegmaier
, Antonio Castillo
, Luis Cottet
, Silvio Montalvo

^*Corresponding author for this work

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

2 Scopus citations

Abstract

BACKGROUND: Biological activity monitored through the dynamic respiration index (DRI) and the calculation of biological heat generation (Q_bio) through O₂ consumption has been reported only scarcely in the case of biodrying. Therefore, the present work studies the DRI and Q_bio for a dewatered secondary sewage sludge biodrying process under different operating conditions: airflow rate (AFR) and initial moisture content (IMC). RESULTS: It was found that AFR has an important effect on oxygen consumption, with higher DRI (≤6 gO₂ kgVS^–1 h^–1) at higher AFR for different studied IMCs. IMC also affects the DRI, with higher values of DRI at higher IMC. Determination of the Q_bio indicated that its calculation through O₂ consumption provided better explanations of the water removal of the process. AFR also affects water removal and volatile solids (VS) degradation, with greater water removal (c. 30%) and lower VS degradation (c. 3.6%) at lower AFR. CONCLUSIONS: AFR strongly affects the DRI, with higher DRI at low AFR. The calculation of Q_bio through O₂ consumption is recommended.

Original language	English
Pages (from-to)	94-101
Number of pages	8
Journal	Journal of Chemical Technology and Biotechnology
Volume	95
Issue number	1
DOIs	https://doi.org/10.1002/jctb.6210
State	Published - 1 Jan 2020
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2019 Society of Chemical Industry

UN SDGs

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

SDG 7 Affordable and Clean Energy

Keywords

DRI
O consumption
biodrying
energy release
secondary sludge

Access to Document

10.1002/jctb.6210

Cite this

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title = "Biodrying of dewatered secondary sludge: behavior of dynamic respiration index (DRI) and energy release under different operating conditions",

abstract = "BACKGROUND: Biological activity monitored through the dynamic respiration index (DRI) and the calculation of biological heat generation (Qbio) through O2 consumption has been reported only scarcely in the case of biodrying. Therefore, the present work studies the DRI and Qbio for a dewatered secondary sewage sludge biodrying process under different operating conditions: airflow rate (AFR) and initial moisture content (IMC). RESULTS: It was found that AFR has an important effect on oxygen consumption, with higher DRI (≤6 gO2 kgVS–1 h–1) at higher AFR for different studied IMCs. IMC also affects the DRI, with higher values of DRI at higher IMC. Determination of the Qbio indicated that its calculation through O2 consumption provided better explanations of the water removal of the process. AFR also affects water removal and volatile solids (VS) degradation, with greater water removal (c. 30\%) and lower VS degradation (c. 3.6\%) at lower AFR. CONCLUSIONS: AFR strongly affects the DRI, with higher DRI at low AFR. The calculation of Qbio through O2 consumption is recommended.",

keywords = "DRI, O consumption, biodrying, energy release, secondary sludge",

author = "C{\'e}sar Huili{\~n}ir and Estefan{\'i}a Leiva and Francisco Stegmaier and Antonio Castillo and Luis Cottet and Silvio Montalvo",

note = "Publisher Copyright: {\textcopyright} 2019 Society of Chemical Industry",

year = "2020",

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day = "1",

doi = "10.1002/jctb.6210",

language = "English",

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Biodrying of dewatered secondary sludge: behavior of dynamic respiration index (DRI) and energy release under different operating conditions. / Huiliñir, César; Leiva, Estefanía; Stegmaier, Francisco et al.
In: Journal of Chemical Technology and Biotechnology, Vol. 95, No. 1, 01.01.2020, p. 94-101.

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

TY - JOUR

T1 - Biodrying of dewatered secondary sludge

T2 - behavior of dynamic respiration index (DRI) and energy release under different operating conditions

AU - Huiliñir, César

AU - Leiva, Estefanía

AU - Stegmaier, Francisco

AU - Castillo, Antonio

AU - Cottet, Luis

AU - Montalvo, Silvio

PY - 2020/1/1

Y1 - 2020/1/1

N2 - BACKGROUND: Biological activity monitored through the dynamic respiration index (DRI) and the calculation of biological heat generation (Qbio) through O2 consumption has been reported only scarcely in the case of biodrying. Therefore, the present work studies the DRI and Qbio for a dewatered secondary sewage sludge biodrying process under different operating conditions: airflow rate (AFR) and initial moisture content (IMC). RESULTS: It was found that AFR has an important effect on oxygen consumption, with higher DRI (≤6 gO2 kgVS–1 h–1) at higher AFR for different studied IMCs. IMC also affects the DRI, with higher values of DRI at higher IMC. Determination of the Qbio indicated that its calculation through O2 consumption provided better explanations of the water removal of the process. AFR also affects water removal and volatile solids (VS) degradation, with greater water removal (c. 30%) and lower VS degradation (c. 3.6%) at lower AFR. CONCLUSIONS: AFR strongly affects the DRI, with higher DRI at low AFR. The calculation of Qbio through O2 consumption is recommended.

AB - BACKGROUND: Biological activity monitored through the dynamic respiration index (DRI) and the calculation of biological heat generation (Qbio) through O2 consumption has been reported only scarcely in the case of biodrying. Therefore, the present work studies the DRI and Qbio for a dewatered secondary sewage sludge biodrying process under different operating conditions: airflow rate (AFR) and initial moisture content (IMC). RESULTS: It was found that AFR has an important effect on oxygen consumption, with higher DRI (≤6 gO2 kgVS–1 h–1) at higher AFR for different studied IMCs. IMC also affects the DRI, with higher values of DRI at higher IMC. Determination of the Qbio indicated that its calculation through O2 consumption provided better explanations of the water removal of the process. AFR also affects water removal and volatile solids (VS) degradation, with greater water removal (c. 30%) and lower VS degradation (c. 3.6%) at lower AFR. CONCLUSIONS: AFR strongly affects the DRI, with higher DRI at low AFR. The calculation of Qbio through O2 consumption is recommended.

KW - DRI

KW - O consumption

KW - biodrying

KW - energy release

KW - secondary sludge

UR - https://www.scopus.com/pages/publications/85074344362

U2 - 10.1002/jctb.6210

DO - 10.1002/jctb.6210

M3 - Article

AN - SCOPUS:85074344362

SN - 0268-2575

VL - 95

SP - 94

EP - 101

JO - Journal of Chemical Technology and Biotechnology

JF - Journal of Chemical Technology and Biotechnology

IS - 1

ER -

Biodrying of dewatered secondary sludge: behavior of dynamic respiration index (DRI) and energy release under different operating conditions

Abstract

Bibliographical note

UN SDGs

Keywords

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