The effect of ultrasonic treatment on biological hydrogen production from anaerobic fermentation of sludge

Feng, Wu

doi:10.1016/j.jbiotec.2008.07.1498

Cited by 3 publications

(1 citation statement)

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“…Compared to an initial SCOD concentration of 1725 mg/l in untreated sewage sludge, SCOD concentration in pretreated sludge's increased 1.2 to 1.9-fold with different sterilization times. This is in agreement with the result of Feng [20], who showed a 2.7-fold increase in SCOD concentration from pretreated sludge by ultrasonic treatment. Moreover, there was only a small increase in ammonia amounts from pretreated (autoclave treatment) sludge compared to ammonia concentration in untreated sludge.…”

Section: A Characteristics Of the Untreated Or Pretreated Sludgesupporting

confidence: 93%

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

Kim¹,

Oh²,

Rakwal³

et al. 2013

IJESD

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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 H 2 /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.

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Section: A Characteristics Of the Untreated Or Pretreated Sludgesupporting

confidence: 93%