Ozonolysis of straw from Secale cereale L. for anaerobic digestion

Jarosław Domański; Olga Marchut-Mikołajczyk; Arkadiusz Polewczyk; Bartłomiej Januszewicz

doi:10.1016/j.biortech.2017.08.090

Ozonolysis of straw from Secale cereale L. for anaerobic digestion

Bioresour Technol. 2017 Dec;245(Pt A):394-400. doi: 10.1016/j.biortech.2017.08.090. Epub 2017 Aug 20.

Authors

Jarosław Domański¹, Olga Marchut-Mikołajczyk², Arkadiusz Polewczyk³, Bartłomiej Januszewicz⁴

Affiliations

¹ Faculty of Biotechnology and Food Science, Institute of Fermentation Technology and Microbiology, Lodz University of Technology, Lodz, Poland. Electronic address: jaroslaw.domanski@p.lodz.pl.
² Faculty of Biotechnology and Food Science, Institute of Technical Biochemistry, Lodz University of Technology, Lodz, Poland.
³ Faculty of Biotechnology and Food Science, Institute of Food Chemistry, Lodz University of Technology, Lodz, Poland.
⁴ Faculty of Mechanical Engineering, Institute of Material Science and Engineering, Lodz University of Technology, Lodz, Poland.

PMID: 28898836
DOI: 10.1016/j.biortech.2017.08.090

Abstract

The effect of different ozonation conditions on straw from Secale cereale (rye straw) pretreatment has been investigated. Using the Taguchi method, this study analyzed the optimum conditions for pretreatment of rye straw by ozonation. After 60min of rye straw ozonation the concentration of reducing sugars (RS) and volatile fatty acid (VFA), chemical oxygen demand (COD) were 7.4, 32.3 and 11.7 times higher, respectively compared to samples raw rye straw. The most effective rye straw ozonation occurred while using the highest amount of the rye straw (15g) treated with lower ozone dose (100gO₃/m³) in the longest period of time (60min). For this variant of experiment the increment of methane production was 291.71dm³CH₄/kgVS. Moreover, co-digestion of sewage sludge with addition of 20% ozonated rye straw allowed to obtain 269.1dm³CH₄/kgVS. The positive effect of ozone on changes in the rye straw structure has been confirmed by SEM and FTIR analysis.

Keywords: Anaerobic digestion; Ozone; Pretreatment; Rye straw; Structural modification.

MeSH terms

Anaerobiosis
Biological Oxygen Demand Analysis
Fatty Acids, Volatile
Methane
Ozone*
Secale*
Sewage*

Substances

Fatty Acids, Volatile
Sewage
Ozone
Methane