Leveraging Acid-Hydrolyzed Corn Stover and Pig Manure as Substrates for Optimized Biogas Production: A Circular Economy Approach

Art Jared Eduria (), Xyra Mangubat (), Roxanne Jayne Nailes (), Sherwin Lloyd Llemit (), Ruel Bactong (), Alexander Ido () and Renato Arazo ()
Additional contact information
Art Jared Eduria: University of Science and Technology of Southern Philippines
Xyra Mangubat: University of Science and Technology of Southern Philippines
Roxanne Jayne Nailes: University of Science and Technology of Southern Philippines
Sherwin Lloyd Llemit: University of Science and Technology of Southern Philippines
Ruel Bactong: University of Science and Technology of Southern Philippines
Alexander Ido: University of Science and Technology of Southern Philippines
Renato Arazo: University of Science and Technology of Southern Philippines

Circular Economy and Sustainability, 2024, vol. 4, issue 3, 1793-1804

Abstract: Abstract One of the most promising energy generation techniques for sustainable development is the production of biogas from waste. This study exploited corn stover (CS), abundant waste material in corn plantations, as feedstock with pig manure (PM) as inoculum in biogas production. The CS was pretreated via acid hydrolysis using sulfuric acid. In the batch experiment of acid-hydrolyzed CS, the hydraulic retention time (HRT) and the ratio of corn stover and pig manure (CS/PM ratio) were used as variables in the design of the experiment using the central composite design of the response surface methodology. The effects of these variables on biogas yield were investigated through analysis of variance and 3D surface plots. The best conditions of HRT and CS/PM ratio that would result in optimal biogas yield were also determined via numerical optimization using the built-in feature of the Design Expert software used in data analysis. Additionally, the biogas compositions were determined via gas chromatography analysis. Results showed that the biogas production was significantly affected by CS/PM ratio, with yield peaking at 2:1 to 3:1 (w/w) CS/PM ratio. On the other hand, HRT did not significantly affect biogas production, with an insignificant change in yield even at a variable time. Numerical optimization revealed that the best conditions, such as 10 days of HRT and a 2:1 (w/w) CS/PM ratio, yielded 10.4 L of biogas out of 1000 g feeding concentration (667 g CS and 333 g PM). Based on the gas compositional analysis, the 10.4 L biogas composed of the following: methane of 4.49 L (43.13%), carbon dioxide of 3.88 L (37.29%), nitrogen of 0.19 L (1.85%), and other gases of 1.84 L (17.73%). With published and known purification techniques of biogas using a cleaning device, the desired methane gas can be obtained for various applications.

Keywords: Acid Hydrolysis; Biogas; Corn Stover; Methane; Pig Manure Inoculum; Response Surface Methodology (search for similar items in EconPapers)
Date: 2024
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
http://link.springer.com/10.1007/s43615-024-00362-w Abstract (text/html)
Access to the full text of the articles in this series is restricted.

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:spr:circec:v:4:y:2024:i:3:d:10.1007_s43615-024-00362-w

Ordering information: This journal article can be ordered from
https://www.springer.com/journal/43615

DOI: 10.1007/s43615-024-00362-w

Access Statistics for this article

More articles in Circular Economy and Sustainability from Springer
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().