Using Acetylene as a Low-cost and Effective Methanogenesis Inhibitor in Single Chamber Microbial Electrolysis Cells Public Deposited

http://ir.library.oregonstate.edu/concern/undergraduate_thesis_or_projects/7p88cj339

Descriptions

Attribute NameValues
Creator
Abstract or Summary
  • Microbial electrolysis cells (MECs) for hydrogen production exhibit great advantages over many other biohydrogen production techniques in terms of versatility of substrate and hydrogen yield. However, hydrogen scavenging by methanogens put forward a great challenge to the application of the single chamber MECs when using mixed culture. Various strategies were developed against methanogens but with limited effect or challenges to practical application. This study demonstrated that the presence of 5-10% (v/v) acetylene in headspace can successfully inhibit methanogenesis in MECs using both acetate and glucose as substrates. While 0.1% of acetylene in the headspace was not effective for inhibiting methanogens, 1% acetylene somewhat suppressed methanogens when acetate was used as substrate. Acetylene at 5% and 10% demonstrated superior methanogen inhibition effects over the classic methanogen inhibitor, 2-bromoethanesulfonate (BES) at 5 mM. The acetylene inhibition was specific to methanogens. No evidence of inhibition against exoelectrogens was found, compared to BES and no treatment controls. MEC performance with diluted wastewater was also explored, but more must be done to avoid swings in pH during batch-operation. Our cost analysis suggests that utilizing acetylene is a cost-effective way of inhibiting methanogens in MECs, indicating its great potential for practical application.
Resource Type
Date Available
Date Issued
Degree Level
Degree Name
Degree Field
Degree Grantor
Commencement Year
Advisor
Non-Academic Affiliation
Rights Statement
Related Items
Publisher
Peer Reviewed
Replaces
Additional Information
  • description.provenance : Submitted by Stephanie Trujillo (trujilst@oregonstate.edu) on 2017-06-07T22:54:14ZNo. of bitstreams: 2license_rdf: 1370 bytes, checksum: cd1af5ab51bcc7a5280cf305303530e9 (MD5)TrujilloStephanieA2017b.pdf: 2795054 bytes, checksum: 4b19b2e096287daeb97777fd7a527e48 (MD5)
  • description.provenance : Made available in DSpace on 2017-06-12T17:00:12Z (GMT). No. of bitstreams: 2license_rdf: 1370 bytes, checksum: cd1af5ab51bcc7a5280cf305303530e9 (MD5)TrujilloStephanieA2017b.pdf: 2795054 bytes, checksum: 4b19b2e096287daeb97777fd7a527e48 (MD5)
  • description.provenance : Approved for entry into archive by Steven Van Tuyl(steve.vantuyl@oregonstate.edu) on 2017-06-12T17:00:12Z (GMT) No. of bitstreams: 2license_rdf: 1370 bytes, checksum: cd1af5ab51bcc7a5280cf305303530e9 (MD5)TrujilloStephanieA2017b.pdf: 2795054 bytes, checksum: 4b19b2e096287daeb97777fd7a527e48 (MD5)

Relationships

Parents:

This work has no parents.

Last modified

Downloadable Content

Download PDF

Items