Effects of different pretreatment methods on fermentation types and dominant bacteria for hydrogen production

Ren, Nanqi; Guo, Wei; Wang, Xiangjing; Xiang, Wensheng; Liu, Bingfeng; Wang, Xingzu; Ding, Jie; Chen, Zhaobo

doi:10.1016/j.ijhydene.2008.06.003

Cited by 225 publications

(106 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…For such purposes, a lot of tools have been developed based on heat shock, addition of chemicals, swinging the oxidation-reduction potential (ORP) e.g. by aeration, high energy irradiation, alteration of pH, freezing and thawing [26][27][28]. These pretreatment techniques exploit the distinct sensitivity of strains present in the mixture and in general could provide a satisfactory starter culture to be used as seed inocula for subsequent biohydrogen fermentation.…”

Section: Pretreatment and Stimulationmentioning

confidence: 99%

Review on the start-up experiences of continuous fermentative hydrogen producing bioreactors

Bakonyi

Nemestóthy

Simon

et al. 2014

Renewable and Sustainable Energy Reviews

113

View full text Add to dashboard Cite

a b s t r a c tThe start-up of continuous biohydrogen fermentations is a complex procedure and a key to acceptable hydrogen production performance and successful long-term operation. In this review article, the experiences gained and lessons learned from relevant literature studies dealing with various aspects of H 2 producing bioreactor start-up are comprehensively surveyed. Firstly, the importance of H 2 -forming biosystem start-up including its main steps is outlined. Afterwards, the role of main influencing factors and methods (e.g. strain selection, seed pretreatment and inocula stimulation, switch-over time, bioreactor design, operating conditions) in avoiding the deterioration of starting a reactor is analyzed and presented in detail. Finally, the so far suggested applicable start-up strategies and the corresponding findings are critically discussed pointing out the advantages and disadvantages of each strategy.

show abstract

Section: Pretreatment and Stimulationmentioning

confidence: 99%

Review on the start-up experiences of continuous fermentative hydrogen producing bioreactors

Bakonyi

Nemestóthy

Simon

et al. 2014

Renewable and Sustainable Energy Reviews

113

View full text Add to dashboard Cite

show abstract

“…Hydrogen production from waste may become a technological and economically feasible alternative and, at the same time, integrate the principles of sustainable development because different residues can be used as substrate for biohydrogen production, such as: sucrose, wheat starch, organic fraction of solid waste, biological reactor effluent, vegetable oils and waste from biodiesel and ethanol production processes (Lin and Lay, 2005;Argun et al, 2008;Turcot et al, 2008and 2009aDas and Veziroglu, 2001;Kawagoshi et al 2005;Li and Fang, 2007;Davila-Vazquez et al, 2007;Ren et al, 2008;Wang et al, 2009b). Moreover, the effluent of biohydrogen production units may be used to produce biomethane by anaerobic digestion.…”

Section: Introductionmentioning

confidence: 99%

AnSBBR with circulation applied to biohydrogen production treating sucrose based wastewater: effects of organic loading, influent concentration and cycle length

Santos

Rodrigues

Ratusznei

et al. 2014

Braz. J. Chem. Eng.

View full text Add to dashboard Cite

-An anaerobic sequencing batch biofilm reactor (AnSBBR) containing immobilized biomass and operating with recirculation of the liquid phase (total liquid volume 4.5 L; treated volume per cycle 1.9 L) was used to treat sucrose-based wastewater at 30 ºC and produce biohydrogen. The influence of applied volumetric organic load was studied by varying the influent concentration at 3600 and 5400 mgCOD.L -1 and using cycle lengths of 4, 3 and 2 hours, obtaining in this manner volumetric organic loads of 9, 12, 13.5, 18 and 27 gCOD.L . Different performance indicators were used: productivity and yield of biohydrogen per applied and removed load, reactor stability and efficiency based on the applied and removed organic loads, both in terms of organic matter (measured as COD) and carbohydrate (sucrose). The results revealed system stability (32-37% of H 2 in biogas) during biohydrogen production, as well as substrate consumption (12-19% COD; 97-99% sucrose). Conversion efficiencies decreased when the influent concentration was increased (at constant cycle length) and when cycle lengths were reduced (at constant influent concentrations). The best yield was 4.16 mol-H 2 .kg-SUC -1 (sucrose load) at 9 gCOD.L -1.d -1 (3600 mgCOD.L -1 and 4 h) with H 2 content in the biogas of 36% (64% CO 2 and 0% CH 4 ). However, the best specific molar productivity of hydrogen was 8.5 molH 2 .kgTVS .d -1 (5400 mgCOD.L -1 and 3 h), indicating that the best productivity tends to occur at higher organic loads, as this parameter involves the "biochemical generation" of biogas, whereas the best yield tends to occur at lower and/or intermediate organic loads, as this parameter involves "biochemical consumption" of the substrate. The most significant metabolites were ethanol, acetic acid and butyric acid. Microbiological analyses revealed that the biomass contained bacilli and endospore filaments and showed no significant variations in morphology between different experimental conditions.

show abstract

“…For example, compared with alkali treatment, heat treatment can completely suppress the activity of methanogens [18]. Mu et al [19] stated that hydrogen production from glucose by heat-treated seed sludge was much higher than that by alkali-treated seed sludge.…”

mentioning

confidence: 99%

Impact of alkali and heat pretreatment on the pathway of hydrogen production from sewage sludge

2010

View full text Add to dashboard Cite

Due to the presence of various types of hydrogen-producing bacteria and numerous organics such as protein and carbohydrate, sewage sludge is a potential material for biological hydrogen production. In this study, two batch tests were carried out to investigate the impact of alkali and heat pretreatment on the pathway of hydrogen production from sewage sludge. The results showed that the heat treatment had a stronger lethal effect on bacteria than the alkali treatment, and could effectively kill hydrogen-consuming bacteria. The heat treatment was more suitable for enriching acidophilic hydrogen-producing bacteria, while the alkali treatment was more suitable for enriching basophilic hydrogen-producing bacteria. A maximum hydrogen production of 10.32 mL/g-COD from alkali pretreated sludge was obtained at an initial pH of 11; while a maximum hydrogen production of 8.94 mL/g-COD from heat pretreated sludge was obtained at an initial pH of 5. Hydrogen production in alkali conditions (pH>9) from alkali pretreated sludge mainly depended on the fermentation of protein by protein-utilizing bacteria; whereas hydrogen production in acidic conditions (pH<6) from heat pretreated sludge mainly depended on the fermentation of carbohydrate by glucose-utilizing bacteria. sewage sludge, alkali pretreatment, heat pretreatment, hydrogen production Citation:Wei S Z, Xiao B Y, Liu J X. Impact of alkali and heat pretreatment on the pathway of hydrogen production from sewage sludge.

show abstract

Effects of different pretreatment methods on fermentation types and dominant bacteria for hydrogen production

Cited by 225 publications

References 41 publications

Review on the start-up experiences of continuous fermentative hydrogen producing bioreactors

Review on the start-up experiences of continuous fermentative hydrogen producing bioreactors

AnSBBR with circulation applied to biohydrogen production treating sucrose based wastewater: effects of organic loading, influent concentration and cycle length

Impact of alkali and heat pretreatment on the pathway of hydrogen production from sewage sludge

Contact Info

Product

Resources

About