A robust, low-temperature, closed-loop anaerobic system for high-solid mixed farm wastes: advancing agricultural waste management solutions in Canada

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DOI

https://doi.org/10.1007/s11356-024-33654-7

Language of the publication
English
Date
2024-05-23
Type
Article
Author(s)
  • Bele, Vaibhavi
  • Goyette, Bernard
  • An, Chungjiang
  • Achouri, Inès Esma
  • Chaib, Oumaima
  • Rajagopal, Rajinikanth
Publisher
Springer Nature

Abstract

This study investigates the effectiveness of low-temperature (20 ± 1 °C) anaerobic digestion (AD) for two organic multiple farm substrate combinations: Set 1 comprising chicken manure (CM), dairy manure (DM), and waste corn silage (CS) and Set 2 comprising CM, DM, pig manure (PM), and CS. Inoculum adaptation steps were carried out using CM and CM+DM for Set 1 and Set 2, respectively. Over three consecutive operating cycles spanning 245 days with increasing organic loads, 4.3 and 2.8 g VS L−1 d−1 for Sets 1 and 2 during Cycles 1 to 5.1 and 4.6 g VS L−1 d−1for Sets 1 and 2 during Cycle 3, a closed-loop two-stage liquid-solid AD system was employed, with performance assessed via stability ratios of short-chain volatile fatty acids and alkalinity. Results demonstrate that mono-digestion of CM with adapted inoculum yielded the highest biogas production of 424 ± 4 L over 77 days, indicating superior performance by Set 1 during Phase I, whereas a similar performance was observed during Phase 2, where Sets 1 and 2 exhibited highest specific methane yields of 0.233 ± 0.028 and 0.262 ± 0.004 L g−1 VSfed, respectively, over 68 days. Analysis of heavy metal concentrations in digestates revealed a significant decrease compared to initial raw substrate concentrations, highlighting their role as nutrients for microbial growth. This study, the first of its kind, highlights the potential of low-temperature AD systems to manage diverse organic residues/byproducts and offers insights into effective performance monitoring without compromising system integrity.

Subject

  • Agriculture

Keywords

  • anaerobic digestion,
  • heavy metals,
  • low temperatures,
  • methane yield

Rights

Pagination

19 pages

Peer review

Yes

Identifiers

ISSN
0944-1344
1614-7499

Article

Journal title
Environmental Science and Pollution Research
Journal volume
31
Accepted date
2024-05-07
Submitted date
2023-10-03

Citation(s)

Bele, V., Goyette, B., An, C., Anchouri, I. E., Chaib, O., & Rajagopal, R. (2024). A robust, low-temperature, closed-loop anaerobic system for high-solid mixed farm wastes: advancing agricultural waste management solutions in Canada. Environmental Science and Pollution Research, 131. https://doi.org/10.1007/s11356-024-33654-7

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Collection(s)

Agricultural practices, equipment, and technology

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