Hythane (H2 + CH4) production from petrochemical wastewater containing mono-ethylene glycol via stepped anaerobic baffled reactor

Elreedy, Ahmed; Tawfik, Ahmed; Kubota, Kengo; Shimada, Yusuke; Harada, Hideki

doi:10.1016/j.ibiod.2015.09.015

Cited by 45 publications

(10 citation statements)

References 48 publications

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“…One of the approaches was the conversion of ethylene glycol to methane (Elreedy et al 2017 ) by anaerobic digestion. The studies investigated AD as part of petrochemical wastewater (Elreedy et al 2015 ) or polyester wastes (Shin and Bae 2019 ). There were no published data of anaerobic digestion on glycol ethylene only solution.…”

Section: Introductionmentioning

confidence: 99%

“…Experiments with only water-ethylene glycol can show the influence of other pollutants for overall ethylene digestion (Tan et al 2020 ). Elreedy et al ( 2015 , 2017 ) observed hydrogen and methane production from the AD of petrochemical wastewater, but there was no mention if in biogas hydrogen sulphide emission occurred. The occurrence of the emission can determine the origin of hydrogen sulphide without the addition of the source of the compound in feed, and then the gas would be caused by the digestion of bacteria rests.…”

Section: Introductionmentioning

confidence: 99%

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A shift from anaerobic digestion to dark fermentation in glycol ethylene fermentation

Sołowski

Zimiński

Cenian

2021

Environ Sci Pollut Res

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Anaerobic digestion of aqueous glycol ethylene was tested. The process lasted two cycles of 7 days, but after the second cycle, high hydrogen production occurred shift to dark fermentation. The biogas production lasted 14 days, obtaining peak values of hydrogen, and then rapidly stopped. In investigations, the following were checked: dependence of hydrogen, methane and hydrogen sulphide in the process. Mixtures of water with glycol ethylene mass ratio from 0.6 to 0.85 were substrates in experiments. The highest methane production was for water ethylene 0.7 ratio 2.85 L of methane with a yield of 178 mL of methane/g VSS (volatile suspended solids) of glycol ethylene. The optimal ratio of water and glycol ethylene was 0.85 25.5 mL of hydrogen (giving yield 1.71 mL of hydrogen/g VSS of glycol ethylene) and 1.71 mL of hydrogen sulphide emission for a 0.6 ratio. Popular polymer industry wastes, glycol ethylene, can be utilised by anaerobic digestion.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A shift from anaerobic digestion to dark fermentation in glycol ethylene fermentation

Sołowski

Zimiński

Cenian

2021

Environ Sci Pollut Res

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“…Cell mass is retained well in the biofilm/ granular aggregates in biofilm systems, leading to have much higher sludge retention time (SRT) compared to HRT, which provides the advantage that the reactor can run at a higher flow rate and can tolerate higher toxic concentrations [128]. Various types of high rate biofilm systems such as UASB, ABR, and SAB can be operated by continuous feeding with the H 2 reactor effluent, with HRTs of less than 5 days [114,125,129,130]. Among the high rate reactor types, the UASB is the most popular for anaerobic treatment of soluble organic matters due to the large surface area of granular sludge, which provides fast biofilm development and improves methanogenesis.…”

Section: Reactors Configuration For Biohythane Productionmentioning

confidence: 99%

“…in the H 2 reactor and efficiently for energy recovery from POME. Elreedy et al[114] established biohythane production from petrochemical wastewater containing mono-ethylene glycol by a novel stepped anaerobic baffled (SAB) reactor. The reactor was continuously operated for 5 months at constant hydraulic retention time (HRT) of 72 h with hydrogen and methane yield of 88 mL H 2 /gVS and 318 mL CH 4 /gVS, respectively.…”

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confidence: 99%

Biohythane Production from Organic Wastes by Two-Stage Anaerobic Fermentation Technology

O‐Thong¹,

Mamimin²,

Prasertsan³

2018

Advances in Biofuels and Bioenergy

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The combination of biohydrogen and biomethane production from organic wastes via two-stage anaerobic fermentation could yield a biohythane gas with a composition of 10-15% H 2 , 50-55% CH 4 and 30-40% CO 2. Biohythane could be upgraded to biobased hythane by removing of CO 2. The two-stage anaerobic fermentation process is based on the different function between acidogens and methanogens in physiology, nutrition needs, growth kinetics, and sensitivity to environmental conditions. In the first stage, the substrate is fermented to H 2 , CO 2 , volatile fatty acids (VFA), lactic acid and alcohols by acidogens with optimal pH of 5-6 and hydraulic retention time (HRT) of 1-3 days. In the second stage, the remaining VFA, lactic acid, and alcohols in the H 2 effluent are converted to CH 4 and CO 2 by methanogens under optimal pH range of 7-8 and HRT of 10-15 days. The advantage of biohythane over traditional biogas are more environmentally, flexible of H 2 /CH 4 ratio, higher energy recovery, higher degradation efficiency, shorter fermentation time, and high potential to use as vehicle fuel. This chapter outlines the general approach of biohythane production via two-stage anaerobic fermentation, principles, microorganisms, reactor configuration, process parameters, methods for improving productivity as well as technical challenges toward the scale-up process of biohythane process.

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“…Egypt produces approximately 500 million cubic meters per year of industrial wastewater of which 50% is partially treated and the major portion is dumped into the sewerage network without treatment causing serious environmental problems . The cake processing industry generates a heavily polluted wastewater which is very rich in coarse suspended solids, lipids, COD, BOD 5 and nitrogen components .…”

Section: Introductionmentioning

confidence: 99%

Potential of using non-inoculated self-aerated immobilized biomass reactor for post-treatment of upflow anaerobic staged reactor treating high strength industrial wastewater

Ali

Farghaly

Roux

et al. 2016

J. Chem. Technol. Biotechnol.

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BACKGROUND: The cake industry produces a heavily polluted wastewater that is characterized by high amounts of suspended solids, lipids, chemical oxygen demand (COD), biochemical oxygen demand (BOD 5 ) and nitrogen components. In this study, assessment of the efficiency of a non-inoculated self-aerated immobilized biomass (SAIB) reactor for post-treatment of the anaerobic effluent of cake processing wastewater was extensively investigated. RESULTS: The reactor was operated at different hydraulic retention times (HRTs) and sludge residence times (SRTs). CODt and CODs removal efficiencies increased from 50 ± 15.2 to 61.8 ± 20.7% and from 51.6 ± 9.3 to 60 ± 17.8% on increasing the HRT from 2.5 to 5.0 h, respectively. Maximum nitrification efficiency and biomass concentration of 67% ± 3.1% and 39.8 gVS L −1 sponge was obtained at an SRT of 42 days. The results of an empirical model showed good agreement between predicted and experimental values. Ammonium oxidizing bacteria (AOB) was dominated and represented 0.14% at the middle zone of the reactor where the dissolved oxygen is sufficient for growth of nitrifiers. CONCLUSION: The innovative SAIB reactor was able to treat cake wastewater with high content of carbon and lipids in comparison with other conventional technologies. The efficiency of the reactor was contingent mainly on HRT, SRT, VSS/TSS ratio, F/M ratio and CODp/CODt ratio. Figure 6(b) shows that most of the organic matter (CODt, CODs, and CODp) was removed in the upper zone of the SAIB reactor: 57 ± 13%, 49 ± 9% and 65 ± 19% removal efficiencies of CODt, CODs and CODp, respectively, were recorded in the upper portion of the reactor. The CODt, CODs and CODp removals gradually decreased from 57 ± 13% to 38 ± 8%, from 49 ± 9% to 37 ± 9% Mechanism of removal of organics and ammonia oxidation along the SAIB reactor height at an SRT of 42 days

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Hythane (H2 + CH4) production from petrochemical wastewater containing mono-ethylene glycol via stepped anaerobic baffled reactor

Cited by 45 publications

References 48 publications

A shift from anaerobic digestion to dark fermentation in glycol ethylene fermentation

A shift from anaerobic digestion to dark fermentation in glycol ethylene fermentation

Biohythane Production from Organic Wastes by Two-Stage Anaerobic Fermentation Technology

Potential of using non-inoculated self-aerated immobilized biomass reactor for post-treatment of upflow anaerobic staged reactor treating high strength industrial wastewater

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