Dissolved methane oxidation and competition for oxygen in down-flow hanging sponge reactor for post-treatment of anaerobic wastewater treatment
Bioresource Technology Volume 102 Issue 22
Page 10299-10304
published_at 2011
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| File | |
| Title ( eng ) |
Dissolved methane oxidation and competition for oxygen in down-flow hanging sponge reactor for post-treatment of anaerobic wastewater treatment
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| Creator |
Hatamoto Masashi
Miyauchi Tomo
Ohashi Akiyoshi
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| Source Title |
Bioresource Technology
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| Volume | 102 |
| Issue | 22 |
| Start Page | 10299 |
| End Page | 10304 |
| Abstract |
Post-treatment of anaerobic wastewater was undertaken to biologically oxidize dissolved methane, with the aim of preventing methane emission. The performance of dissolved methane oxidation and competition for oxygen among methane, ammonium, organic matter, and sulfide oxidizing bacteria were investigated using a lab-scale closed-type down-flow hanging sponge (OHS) reactor. Under the oxygen abundant condition of a hydraulic retention time of 2 h and volumetric air supply rate of 12.95 m(3)-air m(-3) day(-1), greater than 90% oxidation of dissolved methane, ammonium, sulfide, and organic matter was achieved. With reduction in the air supply rate, ammonium oxidation first ceased, after which methane oxidation deteriorated. Sulfide oxidation was disrupted in the final step, indicating that COD and sulfide oxidation occurred prior to methane oxidation. A microbial community analysis revealed that peculiar methanotrophic communities dominating the Methylocaldum species were formed in the DHS reactor operation. (C) 2011 Elsevier Ltd. All rights reserved.
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| Keywords |
Greenhouse gas
Methane oxidation
Anaerobic treatment
Post-treatment
Down-flow hanging sponge (DHS)
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| NDC |
Pollution. Environmental engineering [ 519 ]
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| Language |
eng
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| Resource Type | journal article |
| Publisher |
Elsevier Science Ltd
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| Date of Issued | 2011 |
| Rights |
(c) 2011 Elsevier B.V. All rights reserved.
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| Publish Type | Author’s Original |
| Access Rights | open access |
| Source Identifier |
[ISSN] 0960-8524
[DOI] 10.1016/j.biortech.2011.08.099
[NCID] AA11522750
[DOI] http://dx.doi.org/10.1016/j.biortech.2011.08.099
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