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    • ISSN: 2010-0264
    • Frequency: Bimonthly (2010-2014); Monthly (Since 2015)
    • DOI: 10.18178/IJESD
    • Editor-in-Chief: Prof. Richard Haynes
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Editor-in-chief
The University of Queensland, Australia
It is my honor to be the editor-in-chief of IJESD. The journal publishes good papers in the field of environmental science and development.
IJESD 2013 Vol.4(6): 617-623 ISSN: 2010-0264
DOI: 10.7763/IJESD.2013.V4.425

Simultaneous Organic Solids Disintegration and Fermentative Hydrogen Production by Pretreated Sludge Generated from Wastewater Treatment Plant

Mijung Kim, Sechang Oh, Randeep Rakwal, Chunguang Liu, and Zhenya Zhang
Abstract—This study examines fermentative hydrogen production from untreated (raw) sludge and pretreated sludge by sterilization treatment (15, 30, 45, and 60 min) as substrate using mixed cultures in batch experiments under anaerobic thermophilic conditions. Longer treatment time was found to be highly effective for hydrolyzing organic matters in the sludge. Soluble chemical oxygen demand (SCOD) of pretreated sludge was 1.2 to 1.9-fold higher than that of untreated sludge. Sterilization treatment was found to accelerate and increase hydrogen production throughout the batch mode, but with no measurable methane production. Pretreated (30 min) sludge presented an optimal condition, resulting in maximum hydrogen yield (25.1 ml H2/g-VS) and the highest hydrogen content (60.0%). Under the same conditions, enhanced hydrogen yield was 6.4-fold higher, which came with an additional benefit of efficient VS removal over the use of untreated sludge. This was attributed to destruction of solids in sludge during the solubilization process. Present findings have potential practical use in not only processes for efficient hydrogen production via anaerobic fermentation but also in waste treatment.

Index Terms—Sewage sludge, sterilization treatment, hydrogen production, mixed cultures, anaerobic fermentation.

Mijung Kim, Randeep Rakwal, Chunguang Liu, and Zhenya Zhang are with the Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8572, Japan.
Sechang Oh is with the Graduate School of Comprehensive Human Science, University of Tsukuba, Tsukuba, Ibaraki 305-8574, Japan.
Randeep Rakwal is also with the Organization for Educational Initiatives, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan.
Mijung Kim, Present address: National Institute of Advanced Industrial Science & Technology (AIST), Tsukuba, Ibaraki 305-8562, Japan (e-mail: mijungkim1003@gmail.com; mijung-kimu@aist.go.jp).

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Cite:Mijung Kim, Sechang Oh, Randeep Rakwal, Chunguang Liu, and Zhenya Zhang, "Simultaneous Organic Solids Disintegration and Fermentative Hydrogen Production by Pretreated Sludge Generated from Wastewater Treatment Plant," International Journal of Environmental Science and Development vol. 4, no. 6, pp. 617-623, 2013.

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