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Bioaugmenting anaerobic digestion of biosolids with selected strains of Bacillus, Pseudomonas, and Actinomycetes species for increased methanogenesis and odor control

  • Environmental Biotechnology
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Abstract

The objective of this study was to evaluate the effects of bioaugmenting anaerobic biosolids digestion with a commercial product containing selected strains of bacteria from genera Bacillus, Pseudomonas, and Actinomycetes, along with ancillary organic compounds containing various micronutrients. Specifically, the effects of the bioaugment in terms of volatile solids destruction and generation and fate of odor-causing compounds during anaerobic digestion and during storage of the digested biosolids were studied. Two bench-scale anaerobic digesters receiving primary and secondary clarifier biosolids from various full-scale biological wastewater treatment plants were operated. One of the digesters received the bioaugment developed by Organica Biotech, while the other was operated as control. The bioaugmented digester generated 29% more net CH4 during the 8 weeks of operation. In addition, the average residual propionic acid concentration in the bioaugmented digester was 54% of that in the control. The monitoring of two organic sulfide compounds, methyl mercaptan (CH3SH) and dimethyl sulfide (CH3SCH3), clearly demonstrated the beneficial effects of the bioaugmentation in terms of odor control. The biosolids digested in the bioaugmented digester generated a negligible amount of CH3SH during 10 days of post-digestion storage, while CH3SH concentration in the control reached nearly 300 ppmv during the same period. Similarly, peak CH3SCH3 generated by stored biosolids from the bioaugmented digester was only 37% of that from the control.

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Acknowledgements

This work was supported by Ben Franklin Technology Partners. The authors thank Dr. James R. Woods, Ben Franklin Technology Partners of Southeastern Pennsylvania, and William Toffey, Douglas Cowley, and Gary Laurinaitis of the Philadelphia Water Department for their assistance. Thanks are extended to Dr. Matthew Higgins and Yen-Chih Chen of Bucknell University for their help in protein analyses and odor potential assay.

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Authors and Affiliations

  1. Civil and Environmental Engineering Department, Villanova University, Villanova, PA, 19085, USA

    Metin Duran & Deniz Yurtsever

  2. Spotts, Stevens and McCoy, Inc., 1047 N Park Rd., P.O. Box 6307, Reading, PA, 19610, USA

    Nalan Tepe

  3. Chemical Engineering Department, Villanova University, Villanova, PA, 19085, USA

    Vito L. Punzi

  4. Organica Biotech, Inc., 705 General Washington Ave., Norristown, PA, 19403, USA

    Charles Bruno & Raj J. Mehta

Authors
  1. Metin Duran
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  2. Nalan Tepe
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  3. Deniz Yurtsever
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  4. Vito L. Punzi
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  5. Charles Bruno
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  6. Raj J. Mehta
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Correspondence to Metin Duran.

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Duran, M., Tepe, N., Yurtsever, D. et al. Bioaugmenting anaerobic digestion of biosolids with selected strains of Bacillus, Pseudomonas, and Actinomycetes species for increased methanogenesis and odor control. Appl Microbiol Biotechnol 73, 960–966 (2006). https://doi.org/10.1007/s00253-006-0548-6

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  • DOI: https://doi.org/10.1007/s00253-006-0548-6

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