Bio-hydrolysis and bio-hydrogen production from food waste by thermophilic and hyperthermophilic anaerobic process

Algapani, Dalal E.; Qiao, Wei; Su, Min; Pumpo, Francesca di; Wandera, Simon M.; Adani, Fabrizio; Dong, Renjie

doi:10.1016/j.biortech.2016.06.016

Cited by 71 publications

(17 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…It has already been established that ammonia plays a significant role in carbon to nitrogen (C/N) ratio balancing. In this study, the analysed C/N for FW alone was 18.68 and for FW with 5% oil additions, it was 21.68, which was in agreement with the previous studies in the literature [1,5,38].…”

Section: Effects Of Oil Addition On Ph Tvfas Tic and Fos/tacsupporting

confidence: 92%

“…Additionally, part of this is also caused by rapid VFAs accumulation during hydrolysis, due to the higher growth rate of acidogens as compared to methanogens during the process as reported by Palatsi et al [37]. It is understood that the acid-consuming methanogenic archaea are extremely sensitive and expectedly inhibited by an acid accumulation and decreasing pH than the acid-producing species [38,39]. Lastly, VFA concentration in the range of 1000-3000 mg L −1 would cause moderate inhibition [40].…”

Section: Resultsmentioning

confidence: 97%

“…They also suggested the use of novel anaerobic flotation reactors, separation of oil prior to AD operation [13,18,22]. In such case, the hydraulic retention time (HRT) can be reduced by coupling of thermophilic and mesophilic reactors with H 2 production prior to recirculation for CH 4 production [38,39], while Nielsen [40] compared two-stage thermophilic (55 °C) anaerobic digestion with one-stage thermophilic (55 °C) digestion of cattle manure. Therefore, with the high amount of lipids in FW, it is necessary to seek some effective methods of eliminating the limitation for achieving high performance of FW AD.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of Oil Content on Biogas Production, Process Performance and Stability of Food Waste Anaerobic Digestion

Awe

et al. 2017

Waste Biomass Valor

View full text Add to dashboard Cite

The primary cause of anaerobic digester failure includes accumulation of inhibitory substances and intermediate products such as volatile fatty acids (VFAs), free ammonia (NH 3 + ), and ammonium (NH 4 + ). They (except VFAs) are however required as essential nutrients for bacteria growth. The current study specifically investigated the effect of oil content on the biogas production and the stability of anaerobic digestion of food waste. Two lab scale reactors were designed with different organic loading rates and feeding adjustment of used oil addition to testing the effects of lipids on biodegradation and biogas production. The results indicate that, at 2.0 g VS L −1 d −1 , the addition of oil (5% v/v), caused the reactor failure, whereas, at 4.0 g VS L −1 d −1 , the reactor remained stable for 10 days before the accumulation of VFAs, which resulted in low pH, and thus reduced the biogas and methane production. The addition of NaOH to reactivate the reactors can only improve pH, alkalinity and negatively increased viscosity, but there was no significant effect on biogas production and VFAs concentration. An effective solution to reactivate the reactors was achieved by recirculating 50% of both reactor's effluent back to the reactors. This resulted in biogas recovery and stable process performance of the reactors. Surprisingly, NH 4 + -N remained stable (1400 mg L −1 ) throughout the period, far less than the critical concentration of 3000 mg L −1 . On the contrary, the low NH 4 + -N couldn't contribute to buffering the reactor's high VFA concentration during the unstable period, thereby raising new questions on its roles in anaerobic digestion process.

show abstract

Section: Effects Of Oil Addition On Ph Tvfas Tic and Fos/tacsupporting

confidence: 92%

Section: Resultsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Oil Content on Biogas Production, Process Performance and Stability of Food Waste Anaerobic Digestion

Awe

et al. 2017

Waste Biomass Valor

View full text Add to dashboard Cite

show abstract

“…New sources of cost effective substrate need to be investigated and evaluated according to their potential for biohydrogen production (Ghimire et al, 2015). Food waste constitutes the most representative fraction of municipal solid waste and is also the main factor responsible its methane emissions and landfill leachates (Algapani et al, 2016). Globally, around 2 billion tons of municipal solid waste are formed annually, of which 34-53% is biodegradable organic waste, mainly food waste collected from households and restaurants, but the composition may vary from country to country (Braguglia et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Fermentative biohydrogen production from a novel combination of vermicompost as inoculum and mild heat-pretreated fruit and vegetable waste

2019

View full text Add to dashboard Cite

Please cite this article as: Pascualone M.J., Gómez Costa M.B., Dalmasso P.R. Fermentative biohydrogen production from a novel combination of vermicompost as inoculum and mild heat-pretreated fruit and vegetable waste. Keywords: Biohydrogen Dark fermentation Fruit and vegetable waste Vermicompost Mild heat-pretreated substrateThis study reports for the first time on biohydrogen production by dark fermentation using a novel combination of mild heatpretreated fruit and vegetable waste (FVW) as raw material and vermicompost as an economical source of hydrogen-producing bacteria. A suspension rich in reducing sugars obtained from FVW was used at different initial concentrations (5 to 25 g reducing sugars/L) during the bioprocess conducted in batch reactors at mesophilic temperature of 35 °C. The use of a mild heat-pretreated substrate and the consequent elimination of the natural microbiota present in the FVW led to higher hydrogen production than the control. Clostridium species, hydrogen-producing bacteria via butyric acid fermentation pathway, were the dominant microorganisms in the bioprocess. Hydrogen production, volumetric hydrogen production rate, and pretreated substrate degradation efficiency (63.0 mL/g VS, 372.6 mL/L/d, and 50% BOD5, respectively) obtained in the experiments performed with the highest substrate concentration demonstrated that the developed bioprocess was promising simultaneously leading to high hydrogen contents in biogas and high substrate removal efficiencies.

show abstract

“…The reference [13] compared thermophilic and hyper-thermophilic AD of food wastes for bio-hydrogen production at HRT of 15, 10, 5 and 3 days. Authors reported that the thermophilic temperature was more advantageous than the hyper-thermophilic one.…”

Section: A Performance Of Acidogenic Digestersmentioning

confidence: 99%

Effect of Temperature on Biohydrogen and Biomethane Productions by Anaerobic Digestion of Sugar Beet by-Products

Aboudi¹,

Gómez-Quiroga²,

Álvarez-Gallego³

et al. 2018

IJESD

View full text Add to dashboard Cite

Abstract-This work analyzes the effect of temperature on the anaerobic digestion of sugar beet by-products for both biohydrogen and biomethane production. The findings demonstrate that the anaerobic process was significantly affected by the increase in temperature from mesophilic to thermophilic or hyper-thermophilic conditions. Therefore, it was found that the mesophilic temperature was more suitable for the anaerobic digestion of sugar beet by-products, using either the raw feedstock or the pretreated feedstock at higher temperatures. The specific production of biohydrogen from thermophilic acidogenic digester was 1.7 fold higher than that obtained from the hyper-thermophilic one. Moreover, when raw feedstock was used in single stage digesters, a methane production rate of 0.55 LCH4/Lr*d was obtained from the mesophilic digester, which was 45% higher than that of the thermophilic one. It has been observed that the increase in temperature led to a high accumulation of volatile and long chain fatty acids, inhibiting and slowing down the anaerobic process.

show abstract

Bio-hydrolysis and bio-hydrogen production from food waste by thermophilic and hyperthermophilic anaerobic process

Cited by 71 publications

References 29 publications

Effect of Oil Content on Biogas Production, Process Performance and Stability of Food Waste Anaerobic Digestion

Effect of Oil Content on Biogas Production, Process Performance and Stability of Food Waste Anaerobic Digestion

Fermentative biohydrogen production from a novel combination of vermicompost as inoculum and mild heat-pretreated fruit and vegetable waste

Effect of Temperature on Biohydrogen and Biomethane Productions by Anaerobic Digestion of Sugar Beet by-Products

Contact Info

Product

Resources

About