In-situ injection of potassium hydroxide into briquetted wheat straw and meadow grass - Effect on biomethane production

Bioresource Technology
Lu FengHenrik Bjarne Møller

Abstract

Alkaline pretreatment of lignocellulosic biomass has been intensively investigated but heavy water usage and environmental pollution from wastewater limits its industrial application. This study presents a pretreatment technique by in-situ injection of potassium hydroxide concentrations ranging from 0.8% to 10% (w/w) into the briquetting process of wheat straw and meadow grass. Results show that the biomethane yield and hydrolysis rate was improved significantly with a higher impact on wheat straw compared to meadow grass. The highest biomethane yield from wheat straw briquettes of 353mL.g(-1) VS was obtained with 6.27% (w/w) potassium hydroxide injection, which was 14% higher than from untreated wheat straw. The hydrolysis rates of wheat straw and meadow grass increased from 4.27×10(-2) to 5.32×10(-2)d(-1) and 4.19×10(-2) to 6.00×10(-2)d(-1), respectively. The low water usage and no wastewater production make this a promising technology.

Citations

Apr 29, 2020·Environmental Science and Pollution Research International·Jelica NovakovicMaria Loizidou
Jun 12, 2021·Frontiers in Microbiology·Mads Borgbjerg JensenMichael Vedel Wegener Kofoed

❮ Previous
Next ❯

Related Concepts

Related Feeds

Basal Ganglia

Basal Ganglia are a group of subcortical nuclei in the brain associated with control of voluntary motor movements, procedural and habit learning, emotion, and cognition. Here is the latest research.

Biofuels (ASM)

Biofuels are produced through contemporary processes from biomass rather than geological processes involved in fossil fuel formation. Examples include biodiesel, green diesel, biogas, etc. Discover the latest research on biofuels in this feed.