Study on performance and characteristic of microorganisms in a waste-to-energy system

Amirhossein Malakahmad, Noor Ezlin Ahmad Basri, Shahrom Md Zain

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Performance and characterization of microorganisms in a laboratory-scale anaerobic baffled reactor (ABR) was studied. The ABR was fed continuously at organic loading rate (OLR) of 15.2 g COD/l.d with a substrate containing pre-tested combination of kitchen waste and activated sludge. The HRT (hydraulic retention time), C/N (carbon/nitrogen) and F/M (food/microorganisms) ratios were maintained at 3 d, 31.4 and 0.35 gCOD/gVSS.d, respectively. The amounts of fat, protein, cellulose, hemi-cellulose and lignin which are significant polymers for anaerobic digestion start-up were found to be in appropriate ranges. Results show reduction of pH in front compartments and its boost in successive compartments. This indicates proper placement of acidogens and methanogens in the ABR. Also, significant growth in height of ABR granule bed was observed in the system based on formation and retention of granules. Microorganism characterization reveals large population of Methanosarcina in front part of the reactor although toward the end the amount for Methanosaeta increased. While Methanobacterium, Methanosprilium, Methanococcus and Methanobrevibacter were observed in the ABR, higher percentage of Methanosarcina and Methanotrix indicates production of methane from acetate conversion.

Original languageEnglish
Title of host publicationAdvanced Materials Research
Pages625-630
Number of pages6
Volume626
DOIs
Publication statusPublished - 2013
Event2012 International Conference on Advanced Materials Engineering and Technology, ICAMET 2012 - Penang
Duration: 28 Nov 201230 Nov 2012

Publication series

NameAdvanced Materials Research
Volume626
ISSN (Print)10226680

Other

Other2012 International Conference on Advanced Materials Engineering and Technology, ICAMET 2012
CityPenang
Period28/11/1230/11/12

Fingerprint

Microorganisms
Cellulose
Methanogens
Kitchens
Anaerobic digestion
Oils and fats
Lignin
Methane
Hydraulics
Nitrogen
Proteins
Carbon
Polymers
Substrates

Keywords

  • Anaerobes characterization
  • Anaerobic baffled reactor (ABR)
  • Methane

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Malakahmad, A., Ahmad Basri, N. E., & Md Zain, S. (2013). Study on performance and characteristic of microorganisms in a waste-to-energy system. In Advanced Materials Research (Vol. 626, pp. 625-630). (Advanced Materials Research; Vol. 626). https://doi.org/10.4028/www.scientific.net/AMR.626.625

Study on performance and characteristic of microorganisms in a waste-to-energy system. / Malakahmad, Amirhossein; Ahmad Basri, Noor Ezlin; Md Zain, Shahrom.

Advanced Materials Research. Vol. 626 2013. p. 625-630 (Advanced Materials Research; Vol. 626).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Malakahmad, A, Ahmad Basri, NE & Md Zain, S 2013, Study on performance and characteristic of microorganisms in a waste-to-energy system. in Advanced Materials Research. vol. 626, Advanced Materials Research, vol. 626, pp. 625-630, 2012 International Conference on Advanced Materials Engineering and Technology, ICAMET 2012, Penang, 28/11/12. https://doi.org/10.4028/www.scientific.net/AMR.626.625
Malakahmad, Amirhossein ; Ahmad Basri, Noor Ezlin ; Md Zain, Shahrom. / Study on performance and characteristic of microorganisms in a waste-to-energy system. Advanced Materials Research. Vol. 626 2013. pp. 625-630 (Advanced Materials Research).
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