Biodrying of the Light Fraction from Anaerobic Digestion Pretreatment in Order to Increase the Total Recovery Rate

Pecorini, Isabella; Bacchi, Donata; Iannelli, Renato

doi:10.3390/pr8030276

Cited by 6 publications

(3 citation statements)

References 32 publications

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“…Despite of the good physical and chemical properties, the compost was not completely stable, showing an O 2 consumption of 884 mgO 2 /kg TVS h (175 µgO 2 /g TS h) and a CO 2 production of 570 mgCO 2 /kg TVS h (113 µgCO 2 /g TS h). Such measurements were performed using the potential dynamic respirometric index method [32,33]. In order to evaluate compost respiration, a special monitoring survey was performed in June 2018 to measure the specific CO 2 flux at the biofilter surface as other authors have done [18,21].…”

Section: Biofiltration Systemsmentioning

confidence: 99%

Mitigation of Methane, NMVOCs and Odor Emissions in Active and Passive Biofiltration Systems at Municipal Solid Waste Landfills

2020

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Biofiltration systems are emerging technological solutions for the removal of methane and odors from landfill gas when flaring is no longer feasible. This work analyzed and compared two full-scale biofiltration systems: biofilter and biowindows. The emission mitigation of methane, non-methane volatile organic compounds (NMVOCs) and odors during a two-year management and monitoring period was studied. In addition to diluted methane, more than 50 NMVOCs have been detected in the inlet raw landfill gas and the sulfur compounds resulted in the highest odor activity value. Both systems, biofilter and biowindows, were effective for the oxidation of methane (58.1% and 88.05%, respectively), for the mitigation of NMVOCs (higher than 80%) and odor reduction (99.84% and 93.82% respectively). As for the biofilter monitoring, it was possible to define the oxidation efficiency trend and in fact to guarantee that for an oxidation efficiency of 80%, the methane load must be less than 6.5 g CH4/m2h with an oxidation rate of 5.2 g CH4/m2h.

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Section: Biofiltration Systemsmentioning

confidence: 99%

Mitigation of Methane, NMVOCs and Odor Emissions in Active and Passive Biofiltration Systems at Municipal Solid Waste Landfills

2020

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“…In addition to the TS content, the volatile matter content was evaluated for each sample. Also in this case the TVS content was estimated through a gravimetric method as the difference in weight found before and after incineration of the sample in muffle at 550 • C until a constant weight is reached (between 6 and 8 h) [30]. Each sample was analyzed in triplicate on aliquots of approximately 100-800 g depending on the fraction being analyzed.…”

Section: Analysis Of Dry and Volatile Mattermentioning

confidence: 99%

Bromatological, Proximate and Ultimate Analysis of OFMSW for Different Seasons and Collection Systems

2020

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In order to study the quality of organic fractions of municipal solid waste (OFMSW), five different municipalities in Tuscany were chosen for sampling according to the peculiarities of their collection systems. The five collection systems selected were sampled four times: during March, June, September and December, for a total of 20 picking analyses. In addition, emphasis was also given to the study of the variability of OFMSW composition related to ultimate, proximate and bromatological analyses. Road container collection systems proved to have a higher content of non-compostable and undesirable fractions (22%±1%) when compared to door-to-door systems (6% ± 1%). During months with lower temperature (March and December), the garden waste content in the OFMSW was negligible, with kitchen waste prevailing. This altered the physical chemical composition of OFMSW, which had a lower lignin content and higher methane production in the months with lower temperatures (272 ± 23 NLCH4 kgTVS−1) compared to June and September (238 ± 14 NLCH4 kgTVS−1). In general, the Tuscan OFMSW had a higher dry matter content (42%) than observed in previous studies. In conclusion, the result could direct possible future operators of anaerobic digestion plants towards the choice of dry and semi-dry technologies.

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“…Sand was added as a structural material to achieve a good porosity, to avoid compaction, and to ensure an even distribution of the gas from the bottom to the top of the reactors [23]. Total solids (TS), moisture content, and total volatile solids (TVS) were determined by gravimetrical analysis after heating the samples for 24 h at 105 • C and for 3 h at 550 • C, respectively [24]. In addition, the respiration activity of the compost was assessed performing the dynamic respirometric index (DRI) test in accordance with UNI 11184:2016 [25].…”

Section: Filter Media Characterization and Samplingmentioning

confidence: 99%

Methane Oxidation Efficiency in Biofiltration Systems with Different Moisture Content Treating Diluted Landfill Gas

et al. 2020

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This study investigates the influence of moisture content on the potential oxidation efficiency of methane (CH4) of biofiltration systems treating landfill gas containing high oxygen concentrations. Column tests filled with compost with different moisture contents (20%, 30%, and 40%) loaded with different methane flows were set up on a laboratory scale. Analyzing the results the following evidences can be summarized: With low methane load (<100 g CH4 m−2 d−1), a moisture content of 20% was not enough to support bacterial activity, while a moisture content of 40% advantaged the compost respiration assisting it to become the dominating process; with higher methane load (100–300 g CH4 m−2 d−1), a moisture content of 30% resulted in an optimal value to support methanotrophic activity showing the highest CH4 concentration reduction; moving on to a CH4 load above 300 g CH4 m−2 d−1, the inhibition of methanotrophic activity emerged independently to the moisture content of the filter media. The optimal configuration is obtained for a moisture content of 30% and in the case of flows below 200 g CH4 m−2 d−1 for which the oxidation efficiency results higher than 80%.

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Biodrying of the Light Fraction from Anaerobic Digestion Pretreatment in Order to Increase the Total Recovery Rate

Cited by 6 publications

References 32 publications

Mitigation of Methane, NMVOCs and Odor Emissions in Active and Passive Biofiltration Systems at Municipal Solid Waste Landfills

Mitigation of Methane, NMVOCs and Odor Emissions in Active and Passive Biofiltration Systems at Municipal Solid Waste Landfills

Bromatological, Proximate and Ultimate Analysis of OFMSW for Different Seasons and Collection Systems

Methane Oxidation Efficiency in Biofiltration Systems with Different Moisture Content Treating Diluted Landfill Gas

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