Bioenergy Generation from Municipal Solid Waste and Glycerin Waste: Population Dynamics

Zahedi, S.; García‐Morales, J.L.; Sales, D.; Solera, Rosario

doi:10.1021/acs.energyfuels.7b01526

Cited by 4 publications

(4 citation statements)

References 48 publications

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“…A high solubilization (increase in SCOD and VFA and decrease in VS) was detected. The butyrate acid concentration was higher than acetic acid concentration and it was in line to other researches of hydrogen production from similar wastes (Cadiz-Spain urban wastes) (Romero Aguilar et al 2013;Zahedi et al 2013b;Angeriz-Campoy et al 2017;Zahedi et al 2017a). The ratio of butyrate:acetate (g butyrate/g acetate) was 2.5 and it according to the ratios reported by these previous studies.…”

Section: Hydrogenic Phase Performancesupporting

confidence: 91%

“…The cellular concentration and percentages of Bacteria and Archaea were quantified by epifluorescence method (FISH) according to the method of Zahedi et al (Zahedi et al 2013c;Zahedi et al 2017a). The main steps of FISH of whole cells using 16S rRNAtargeted oligonucleotide probes are cell fixation, permeabilisation and hybridisation with the desired probe(s).…”

Section: Microbiological Analysis and Biochemical Activitymentioning

confidence: 99%

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Assessment of Chemical Inhibitor Addition to Improve the Gas Production from Biowaste

Zahedi

Dahunsi

Pérez

et al. 2018

Waste Biomass Valor

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The coexistence of sulphate-reducing bacteria and methanogenic archaea in the reactors during the anaerobic digestion from sulphate-containing waste could favor the accumulation of sulfide on the biogas, and therefore reduce its quality. In this study, the effect of sulphate-reducing bacteria inhibitor (MoO4-2) addition in a two phase system from sulphate-containing municipal solid waste to improve the quality of the biogas has been investigated. The results showed that although SRB and sulphide production decreased, the use of inhibitor was not effective to improve the anaerobic digestion in a two phase system from sulphate-containing waste, since a significant decrease on biogas and organic matter removal were observed. Before MoO4-2 addition the average values of volatile solid were around 12 g/kg, after 5 days of inhibitor use, those values did exceed to 28 g/kg. Molybdate caused acidification in the reactor and it was according to decrease in the pH values. In relation to microbial consortia, the effect of inhibitor was a decrease in Bacteria (44 %; 60% in sulphate-reducing bacteria) and Archaea (38%) populations.

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Section: Hydrogenic Phase Performancesupporting

confidence: 91%

Section: Microbiological Analysis and Biochemical Activitymentioning

confidence: 99%

Assessment of Chemical Inhibitor Addition to Improve the Gas Production from Biowaste

Zahedi

Dahunsi

Pérez

et al. 2018

Waste Biomass Valor

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“…Several studies have been carried out using a MSW-fueled downdraft gasifier. Starting from the feasibility study of MSW as a fuel for gasification, ,− energy analysis resulting from the gasification process, analysis of the thermodynamic equilibrium model of MSW gasification, and a techno-economy analysis of MSW gasification for electricity generation were studied. Based on these studies it can be concluded that MSW has the potential to be used as a gasification feedstock.…”

Section: Introductionmentioning

confidence: 99%

Improved Municipal Solid Waste Gasification Efficiency Using a Modified Downdraft Gasifier with Variations of Air Input and Preheated Air Temperature

et al. 2019

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Gasification is a potential technology to convert municipal solid waste into energy in the form of syngas. Addition of air to the pyrolysis zone and oxidation was carried out by modifying a single-stage downdraft gasifier into a multistage air inlet. The results showed an increase in the syngas heating value and decreased tar content. To determine the performance, the effects of equivalent ratio, preheated air temperature, and air ratio were studied. When the equivalent ratio is increased, the flammable gas and LHV decrease. The optimum conditions were obtained for the equivalent ratio (ER) of 0.4, where the percentage of CO and H2 increased at an oxidation temperature of 902 °C. The variation of the air ratio has a stronger influence than the effect of the equivalent ratio because at the same equivalent ratio an increase in pyrolysis temperature of 674 °C is favorable to reforming tar from primary tar to secondary tar. The CO percentage increased significantly from 18.17% to 22.51%. Air preheating is useful to improve gasification performance, which was characterized by an increase in LHV from 5254 to 5976 kJ/kg. The optimum equivalent ratio and air ratio were 0.4 and 40:60, respectively, and effectively reduced the tar content from 50.02 to 27.82 mg/Nm3. The results of this study can be used to optimize multistage gasifier performance using air preheating and a multistage air inlet.

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“…The MSWI fly ash which contains a large number of heavy metal substances is a subsidiary product of waste incineration power generation technology. Failing to dispose the MSWI fly ash properly, secondary pollution will cause serious environment safety problems 19–24 .…”

Section: Introductionmentioning

confidence: 99%

Experimental study on removing heavy metals from the municipal solid waste incineration fly ash with the modified electrokinetic remediation device

Huang

Zhang

et al. 2019

Sci Rep

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The MSWI fly ash which contains a large number of heavy metal substances is a subsidiary product of waste incineration power generation technology. If the MSWI fly ash is disposed improperly, heavy metal pollutants will pose a great threat to environmental safety and human health. Based on the technology of electrokinetic remediation, the feasibility of removing heavy metal pollutants from the MSWI fly ash using a modified electrokinetic remediation device - cylinder device was evaluated in this study. Differing from the traditional cuboid device with the volume ratio of the cathode chamber to the anode chamber being 1:1, the volume ratio of the cathode chamber to the anode chamber of the cylinder device was 16:1. Changes in parameters, such as pH values and conductivity in the cathode and the anode chambers as well as current and voltage in the sample area were analysed under the voltage gradient of 2 V/cm. After the experiment, the average removal efficiencies for Zn, Pb, Cd and Cu in the sample area were 53.2%, 31.4%, 42.3% and 30.7%, respectively. It indicates that the cylinder device is effective in removing heavy metals from the MSWI fly ash. Adopting the cylinder device for the experimental study on the electrokinetic remediation technology could provide a better way of thinking for the future engineering practices and applications.

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Bioenergy Generation from Municipal Solid Waste and Glycerin Waste: Population Dynamics

Cited by 4 publications

References 48 publications

Assessment of Chemical Inhibitor Addition to Improve the Gas Production from Biowaste

Assessment of Chemical Inhibitor Addition to Improve the Gas Production from Biowaste

Improved Municipal Solid Waste Gasification Efficiency Using a Modified Downdraft Gasifier with Variations of Air Input and Preheated Air Temperature

Experimental study on removing heavy metals from the municipal solid waste incineration fly ash with the modified electrokinetic remediation device

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