Key factors affecting on bio-hydrogen production from co-digestion of organic fraction of municipal solid waste and kitchen wastewater

Tawfik, Ahmed; El-Qelish, Mohamed

doi:10.1016/j.biortech.2014.02.127

Cited by 40 publications

(21 citation statements)

References 31 publications

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“…In some works, it has been reported that longer hydraulic retention times (HRTs) and a preliminary hydrolytic stage are required to degrade complex organic compounds such as proteins, lipids, and carbohydrates. Similar results have been determined when a high concentration of suspended solids constitutes the feedstock .…”

Section: Introductionsupporting

confidence: 85%

Continuous two-staged co-digestion process for biohydrogen production from agro-industrial wastes

Gómez-Romero

Gonzalez-Garcia

Chairez

et al. 2015

Int. J. Energy Res.

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SUMMARYMexico produces large amounts of organic residues. Twenty milliard tons of fruit and vegetable wastes (FVW) are produced yearly. On the other hand, the cheese processing industry produces crude cheese whey (CCW) with an annual production of 1 million metric tons. These types of residues are well characterized, and both constitute a potential feedstock for biohydrogen production, individually or as a mixture. Recently, we demonstrated the feasibility of utilizing CCW and FVW in a co-digestion process to produce biohydrogen. The possibility to design an effective process in a two stage configuration was evaluated based in our previous studies of the by-products and description of microbial ecology evolution of the co-digestion process. An initial assimilation of easily degradable carbohydrates and protein allowed cell growth and acetate and lactate as main byproducts. The co-digestion and two-stage processes increased several times the biohydrogen yield compared with those obtained from single substrate and in a co-digestion single stage process. Higher biohydrogen productivity was a result of reaction stability in comparison to single-substrate digestion and one-stage processes.The effect of hydraulic retention time (HRT) and organic loading rate (OLR) on the volumetric hydrogen production rate (VHPR) and yield (Y H2 ) was evaluated in a two-staged co-digestion process of FVW and CCW. The system consisted of hydrolytic and hydrogenic bioreactors operated in batch mode and continuous regime (89 days), respectively. Eight conditions of HRTs and respective OLRs were evaluated. As HRT decreased, the VHPR increased proportionally, reaching the highest average values around 7 L L À1 d À1 at an HRT between 15 and 17.5 h. The highest Y H2, (813.3 mL H 2 g COD À1 ) was determined at 17.5 h (OLR, 80.02 g COD L À1 d À1 ). Based on the distribution of the final products, the processes occur sequentially and reach a steady state set by the OLR. Biohydrogen production is a result of a syntrophic microbial activity. In general, the two stages of the co-digestion process provided higher stability, reliability, and efficiency.

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Section: Introductionsupporting

confidence: 85%

Continuous two-staged co-digestion process for biohydrogen production from agro-industrial wastes

Gómez-Romero

Gonzalez-Garcia

Chairez

et al. 2015

Int. J. Energy Res.

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“…Increasing temperature also increased the yield for noodle waste to 20 %, which was smaller than the increase in P , representing a higher rate of COD removal at elevated temperature. All the bio-hydrogen yields calculated on the basis of COD removed lay in the range calculated by Tawfik and El-Qelish (2014). Glucose removal efficiency for food waste decreased with an increase in temperature as the increase in P was 23.41 against 42.19 % when bio-hydrogen yield was calculated on the basis of glucose removed .…”

Section: Effect Of Temperature On Bio-hydrogen Yieldmentioning

confidence: 72%

Optimizing the impact of temperature on bio-hydrogen production from food waste and its derivatives under no pH control using statistical modelling

et al. 2015

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Abstract. The effect of temperature on bio-hydrogen production by co-digestion of sewerage sludge with food waste and its two derivatives, i.e. noodle waste and rice waste, was investigated by statistical modelling. Experimental results showed that increasing temperature from mesophilic (37 • C) to thermophilic (55 • C) was an effective mean for increasing bio-hydrogen production from food waste and noodle waste, but it caused a negative impact on bio-hydrogen production from rice waste. The maximum cumulative biohydrogen production of 650 mL was obtained from noodle waste under thermophilic temperature condition. Most of the production was observed during the first 48 h of incubation, which continued until 72 h of incubation. The decline in pH during this interval was 4.3 and 4.4 from a starting value of 7 under mesophilic and thermophilic conditions, respectively. Most of the glucose consumption was also observed during 72 h of incubation and the maximum consumption was observed during the first 24 h, which was the same duration where the maximum pH drop occurred. The maximum hydrogen yields of 82.47 mL VS −1 , 131.38 mL COD −1 , and 44.90 mL glucose −1 were obtained from thermophilic food waste, thermophilic noodle waste and mesophilic rice waste, respectively. The production of volatile fatty acids increased with an increase in time and temperature in food waste and noodle waste reactors whereas they decreased with temperature in rice waste reactors. The statistical modelling returned good results with high values of coefficient of determination (R 2 ) for each waste type and 3-D response surface plots developed by using models developed. These plots developed a better understanding regarding the impact of temperature and incubation time on bio-hydrogen production trend, glucose consumption during incubation and volatile fatty acids production.

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“…These results are higher than those obtained by Tawfik et al . who achieved HY of 116 ± 76 ml H2 /gCOD removed .d. from wet anaerobic digestion of OFMSW and 180 ml H2 /gVS added from OFMSW .…”

Section: Resultsmentioning

confidence: 96%

“…These results are similar to those obtained by Tawfik et al . who found that the removal efficiencies of protein and lipids via wet anaerobic co‐digestion increased from 62 ± 14.8 to 76.4 ± 11.3% and from 37.6 ± 24.4to 74.3 ± 9.1% at increasing the sludge residence time from 3.6 to 5.6 days, respectively (Figure ). Unlikely, Yan et al .…”

Section: Resultsmentioning

confidence: 98%

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Optimization of hydrogen production from organic fraction of municipal solid waste (OFMSW) dry anaerobic digestion with analysis of microbial community

Elsamadony

Tawfik

Danial

et al. 2015

Int. J. Energy Res.

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Summary Effect of mixed culture bacteria (MCB) addition, initial substrate concentration to inoculum (So/Xo), carbon to nitrogen (C/N) ratio on the hydrogen production (HP) from organic fraction of municipal solid waste (OFMSW) via dry anaerobic digestion was investigated. The results showed that supplementation of OFMSW with MCB substantially improved hydrogen yield (HY) and HP. HYs were 306.2 ± 33.0, 149.8 ± 16.6, and 155.3 ± 22.9 mlH2/gCODremoved for OFMSW supplemented with MCB, OFMSW, and MCB, respectively. HP at So/Xo ratio of 9.2 gCOD/gVSS was 3.1 times higher than those obtained at So/Xo ratio of 1.7 gCOD/gVSS. The maximum HY of 338.4 ± 18.9 mlH2/gCODremoved was achieved at So/Xo ratio of 9.2 gCOD/gVSS. The HP and HY were substantially increased from 169.7 ± 17.1 to 524.2 ± 34.4 ml and from 163.1 ± 23.6 to 338.4 ± 18.9 mlH2/gCODremoved with increasing the C/N from 16 to 25, respectively. However, HP and HY decreased at C/N ratio exceeding 26.6. The modified Gompertz equation model was highly fitted to the experimental data with correlation coefficient (R2 > 0.984). The 16S rRNA sequences showed the dominance of Pseudomonas fulva with similarity of 99%. Copyright © 2015 John Wiley & Sons, Ltd.

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Key factors affecting on bio-hydrogen production from co-digestion of organic fraction of municipal solid waste and kitchen wastewater

Cited by 40 publications

References 31 publications

Continuous two-staged co-digestion process for biohydrogen production from agro-industrial wastes

Continuous two-staged co-digestion process for biohydrogen production from agro-industrial wastes

Optimizing the impact of temperature on bio-hydrogen production from food waste and its derivatives under no pH control using statistical modelling

Optimization of hydrogen production from organic fraction of municipal solid waste (OFMSW) dry anaerobic digestion with analysis of microbial community

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