Two-stage anaerobic process for bio-hydrogen and bio-methane combined production from biodegradable solid wastes

Kvesitadze, G.; Sadunishvili, Tinatin; Dudauri, T.; Zakariashvili, Nino; Partskhaladze, G.; Ugrekhelidze, V.; Tsiklauri, G.; Jobava, M.

doi:10.1016/j.energy.2011.08.039

Cited by 27 publications

(23 citation statements)

References 22 publications

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“…This was due to general phenomena that thermophilic conditions favour the system thermodynamics, with enhanced biogas production. It reduces contamination from hydrogenotrophic methanogens and maintains low H 2 partial pressure within the head space [33]. Similarly, Giordano and Giuliano [34,35] observed the hydrogen potential range of 6200e9600 ml H 2 /kg À1 VS and 1800 ml H 2 /kg À1 VS using hydrogen producing bacteria from the food industry waste.…”

Section: Continuous Production Of Hydrogenmentioning

confidence: 97%

Process enhancement of hydrogen and methane production from palm oil mill effluent using two-stage thermophilic and mesophilic fermentation

Krishnan

Singh

Sakinah

et al. 2016

International Journal of Hydrogen Energy

103

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Section: Continuous Production Of Hydrogenmentioning

confidence: 97%

Process enhancement of hydrogen and methane production from palm oil mill effluent using two-stage thermophilic and mesophilic fermentation

Krishnan

Singh

Sakinah

et al. 2016

International Journal of Hydrogen Energy

103

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“…Many studies investigated the pH and HRT effect on hydrogen production and concluded that the optimal pH is 5.5 and optimal HRT is in the range of 3-8 h (Li and Fang, 2007). Recently, Kvesitadze et al (2012) has confirmed that thermophilic hydrogen production from the organic fraction of municipal solid wastes in batches at pH 5.5 peaked at 8 h. On the other hand, A wide range of HRT (2-5 days) was reported for the acidification stage with negligible hydrogen production Takashima and Tanaka, 2010).…”

Section: Hydrogen and Methane Energy Yieldsmentioning

confidence: 99%

Comparative assessment of single-stage and two-stage anaerobic digestion for the treatment of thin stillage

Nasr

Elbeshbishy

Hafez

et al. 2012

Bioresource Technology

143

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a b s t r a c tA comparative evaluation of single-stage and two-stage anaerobic digestion processes for biomethane and biohydrogen production using thin stillage was performed to assess the impact of separating the acidogenic and methanogenic stages on anaerobic digestion. Thin stillage, the main by-product from ethanol production, was characterized by high total chemical oxygen demand (TCOD) of 122 g/L and total volatile fatty acids (TVFAs) of 12 g/L. A maximum methane yield of 0.33 L CH 4 /gCOD added (STP) was achieved in the two-stage process while a single-stage process achieved a maximum yield of only 0.26 L CH 4 /gCO-D added (STP). The separation of acidification stage increased the TVFAs to TCOD ratio from 10% in the raw thin stillage to 54% due to the conversion of carbohydrates into hydrogen and VFAs. Comparison of the two processes based on energy outcome revealed that an increase of 18.5% in the total energy yield was achieved using two-stage anaerobic digestion.

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“…[31]. Similarly, Giordano and Giuliano [32,33] observed the hydrogen potential range of 6200-9600 mL H 2 L 21 VS and 1800 mL H 2 L 21 VS using acidogenic bacteria from the food industry. The difference in the yield could be due to differences in the characteristics of the substrate and operation conditions.…”

Section: Continuous Hydrogen Productionmentioning

confidence: 88%

An investigation of two‐stage thermophilic and mesophilic fermentation process for the production of hydrogen and methane from palm oil mill effluent

Krishnan

Singh

Sakinah

et al. 2017

Env Prog and Sustain Energy

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The two‐stage process of combined hydrogen and methane production with the recirculation of digestate sludge using palm oil mill effluent as substrate was investigated. During the first stage, an up‐flow anaerobic sludge blanket reactor (UASB) was operated at thermophilic conditions [hydraulic retention time (HRT)−2 days, organic loading rate −75 gCOD L−1d−1] for hydrogen production. The operation performance at short HRT and low pH was useful to separate the acidogenesis from methanogenesis. The effluents from UASB reactor containing mainly acetate and butyrate were fed into a continuous stirred tank reactor (CSTR) for methane production under the mesophilic temperature at two different HRTs (5 and 3 days). Both UASB and CSTR reactors were operated for 120 days continuously and a stable production of the hydrogen and methane was obtained simultaneously. The total hydrogen and methane yields obtained were 215 L H2 kgCOD−1 and 320 L CH4 kgCOD−1, respectively with the total COD removal efficiency of 94% in the two stage process. © 2017 American Institute of Chemical Engineers Environ Prog, 36: 895–902, 2017

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Two-stage anaerobic process for bio-hydrogen and bio-methane combined production from biodegradable solid wastes

Cited by 27 publications

References 22 publications

Process enhancement of hydrogen and methane production from palm oil mill effluent using two-stage thermophilic and mesophilic fermentation

Process enhancement of hydrogen and methane production from palm oil mill effluent using two-stage thermophilic and mesophilic fermentation

Comparative assessment of single-stage and two-stage anaerobic digestion for the treatment of thin stillage

An investigation of two‐stage thermophilic and mesophilic fermentation process for the production of hydrogen and methane from palm oil mill effluent

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