Ozonation and thermal pre-treatment of municipal sewage sludge – Implications for toxicity and methane potential

A. Davidsson; Eva Eriksson; J. Fick; J. La Cour Jansen

Ozonation and thermal pre-treatment of municipal sewage sludge – Implications for toxicity and methane potential

A. Davidsson
, Eva Eriksson
, J. Fick
, J. La Cour Jansen

Lund University
Umeå University

Research output: Contribution to conference › Paper › Research › peer-review

Abstract

The aim of this study was to determine the effects on the methane potential and the overall sludge quality from two different sludge pre-treatment technologies (ozonation high/low dosage and thermal treatment 55/70 °C). In general both treatments gave an increased methane potential. The thermal treatment resulted in higher chemical oxygen demand (COD)-solubilisation, while the highest volatile fatty acids (VFA) increase was obtained with ozonation. The sludges had inhibiting effects in a barley seed germination assay and a yeast oestrogen screen both before and after pre-treatment, but the inhibition was reduced by ozone treatment and digestion. No statistical significant reduction in concentrations of the included pharmaceuticals could be seen.

Original language	English
Publication date	2012
Number of pages	8
Publication status	Published - 2012
Event	3rd European Conference on Sludge Management - Leon, Spain Duration: 6 Sept 2012 → 7 Sept 2012 Conference number: 3 http://www.ecsm2012.org/

Conference

Conference	3rd European Conference on Sludge Management
Number	3
Country/Territory	Spain
City	Leon
Period	06/09/2012 → 07/09/2012
Internet address	http://www.ecsm2012.org/

Keywords

Sludge
Pre-treatment
Thermal
Ozone
Biogas
Toxicity
Inhibition
Pharmaceuticals

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title = "Ozonation and thermal pre-treatment of municipal sewage sludge – Implications for toxicity and methane potential",

abstract = "The aim of this study was to determine the effects on the methane potential and the overall sludge quality from two different sludge pre-treatment technologies (ozonation high/low dosage and thermal treatment 55/70 °C). In general both treatments gave an increased methane potential. The thermal treatment resulted in higher chemical oxygen demand (COD)-solubilisation, while the highest volatile fatty acids (VFA) increase was obtained with ozonation. The sludges had inhibiting effects in a barley seed germination assay and a yeast oestrogen screen both before and after pre-treatment, but the inhibition was reduced by ozone treatment and digestion. No statistical significant reduction in concentrations of the included pharmaceuticals could be seen. ",

keywords = "Sludge, Pre-treatment, Thermal, Ozone, Biogas, Toxicity, Inhibition, Pharmaceuticals",

author = "A. Davidsson and Eva Eriksson and J. Fick and \{La Cour Jansen\}, J.",

year = "2012",

language = "English",

note = "3rd European Conference on Sludge Management, ECSM ; Conference date: 06-09-2012 Through 07-09-2012",

url = "http://www.ecsm2012.org/",

}

TY - CONF

T1 - Ozonation and thermal pre-treatment of municipal sewage sludge – Implications for toxicity and methane potential

AU - Davidsson, A.

AU - Eriksson, Eva

AU - Fick, J.

AU - La Cour Jansen, J.

N1 - Conference code: 3

PY - 2012

Y1 - 2012

N2 - The aim of this study was to determine the effects on the methane potential and the overall sludge quality from two different sludge pre-treatment technologies (ozonation high/low dosage and thermal treatment 55/70 °C). In general both treatments gave an increased methane potential. The thermal treatment resulted in higher chemical oxygen demand (COD)-solubilisation, while the highest volatile fatty acids (VFA) increase was obtained with ozonation. The sludges had inhibiting effects in a barley seed germination assay and a yeast oestrogen screen both before and after pre-treatment, but the inhibition was reduced by ozone treatment and digestion. No statistical significant reduction in concentrations of the included pharmaceuticals could be seen.

AB - The aim of this study was to determine the effects on the methane potential and the overall sludge quality from two different sludge pre-treatment technologies (ozonation high/low dosage and thermal treatment 55/70 °C). In general both treatments gave an increased methane potential. The thermal treatment resulted in higher chemical oxygen demand (COD)-solubilisation, while the highest volatile fatty acids (VFA) increase was obtained with ozonation. The sludges had inhibiting effects in a barley seed germination assay and a yeast oestrogen screen both before and after pre-treatment, but the inhibition was reduced by ozone treatment and digestion. No statistical significant reduction in concentrations of the included pharmaceuticals could be seen.

KW - Sludge

KW - Pre-treatment

KW - Thermal

KW - Ozone

KW - Biogas

KW - Toxicity

KW - Inhibition

KW - Pharmaceuticals

M3 - Paper

T2 - 3rd European Conference on Sludge Management

Y2 - 6 September 2012 through 7 September 2012

ER -

Ozonation and thermal pre-treatment of municipal sewage sludge – Implications for toxicity and methane potential

Abstract

Conference

Keywords

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