Comparative analysis of methods and models for predicting biochemical methane potential of various organic substrates

Rodrigues, Rafaela; Rodrigues, Daniela P.; Klepacz-Smółka, Anna; Martins, Rui C.; Quina, Margarida J.

doi:10.1016/j.scitotenv.2018.08.270

Cited by 58 publications

(32 citation statements)

References 30 publications

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“…Moreover, the methane yields for AD of rotten tomato observed in this study are in agreement with the values found in the literature (211-341 NmL CH4 /g VS ) [17,20,30,31]. Rodrigues et al [20] evaluated the anaerobic digestion of RT using flasks of 300 mL, a working volume of 75%, and a SIR of 0.5 at 37 • C, and reported a BMP of 295 NmL CH4 /g VS . A lower value of 211 NmL CH4 /g VS was obtained for the same substrate by Gunaseelan [31], while different operating conditions were applied.…”

Section: Optimization Of the Anaerobic Digestionsupporting

confidence: 91%

“…Indeed, they observed an accumulation of VFA for a higher SIR (1.25-2), proving the imbalance of the process [28]. Moreover, the methane yields for AD of rotten tomato observed in this study are in agreement with the values found in the literature (211-341 NmL CH4 /g VS ) [17,20,30,31]. Rodrigues et al [20] evaluated the anaerobic digestion of RT using flasks of 300 mL, a working volume of 75%, and a SIR of 0.5 at 37 • C, and reported a BMP of 295 NmL CH4 /g VS .…”

Section: Optimization Of the Anaerobic Digestionsupporting

confidence: 91%

“…Moreover, all residues are mainly constituted by carbon and oxygen (>37% and >35%, respectively). According to the literature, the biodegradability of the materials is directly affected by the lignin content [8,20]. The equation developed by Chandler et al [21] states that the maximum biodegradability fraction in anaerobic conditions is about 0.83 and the LG content should not exceed 20%.…”

Section: Residues Characteristicsmentioning

confidence: 99%

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Bioenergy Production through Mono and Co-Digestion of Tomato Residues

et al. 2021

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The agro-industry of tomato generates three types of residues: ripe rotten tomato (unfit for consumption) (RT), green (unripe) tomato (GT), and tomato branches including leaves and stems (TB). These materials are commonly wasted or used as feed for livestock. Energy production through anaerobic digestion is an alternative way to manage and simultaneously valorise these materials. Initially, the operating conditions of mono anaerobic digestion were investigated using RT. Thus, a design of experiments based on a two-level fractional factorial design with resolution V was performed to determine the factors that affect biochemical methane potential (BMP). The substrate to inoculum ratio (SIR), total volatile solids concentration (VSt), working volume (WV), presence of nutrients (Nu), and the pre-incubation of the inoculum (Inc) were investigated. The results showed that SIR is the most important factor. The maximum BMP for RT was 297 NmLCH4/gVS with SIR = 0.5; tVS = 20 g/L; WV = 20%; no pre-incubation and the presence of nutrients. Using these optimum operating conditions, co-digestion was investigated through a mixture design approach. The substrates RT and GT presented similar BMP values, whereas TB led to a significantly lower BMP. Indeed, when high concentrations of TB were used, a significant decrease in methane production was observed. Nonetheless, the highest BMP was achieved with a mixture of 63% RT + 20% GT + 17% TB, with a production of 324 NmLCH4/gVS, corresponding to a synergetic co-digestion performance index of about 1.20. In general, although the substrate RT generates the highest BMP, the mixture with GT did not impair the methane yield. Overall, the co-digestion of tomato residues must be conducted with SIR close to 0.5 and the content of tomato branches in the reaction mixture should be kept low (up to 20%).

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Section: Optimization Of the Anaerobic Digestionsupporting

confidence: 91%

Section: Optimization Of the Anaerobic Digestionsupporting

confidence: 91%

Section: Residues Characteristicsmentioning

confidence: 99%

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Bioenergy Production through Mono and Co-Digestion of Tomato Residues

et al. 2021

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“…Research Article wastewater; 37 29.5−31.5% for pine branches; 59,60 and 24.0− 28.7% for pine stumps. 59 Differences in the amount of insoluble lignin between pine and tomato residues are due to the different composition of lignins.…”

Section: Acs Sustainable Chemistry and Engineeringmentioning

confidence: 99%

“…72 Since the experimental assessment of BMP involves a timeconsuming procedure (more than 30 days), three theoretical models and two multivariate regression equations were applied to evaluate their ability to predict BMP values for further studies. 37 In the case of MT_I and MT_II, a corrective factor was applied based on the BD anae of each substrate, since their biodegradability was not considered in those methods. Regarding MR_I and MR_II, this correction was also applied for PS and PB, because the models did not take into account the lignocellulosic nature of the substrates.…”

Section: Acs Sustainable Chemistry and Engineeringmentioning

confidence: 99%

Assessment of Agroforestry Residues: Their Potential within the Biorefinery Context

Gaspar

Mendes

Pinela

et al. 2019

ACS Sustainable Chem. Eng.

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The concept of bioeconomy has been promoted worldwide in order to replace fossil-based resources and to find new strategies for waste management, by converting biomass into energy, chemicals, and value-added products, in a sustainable way. Despite the efforts that have been made in this area, there are still some unexplored raw materials globally, namely from agricultural and forestry industries. Therefore, the aim of this work was to characterize four abundant residues from the Portuguese agroforestry industry, including pruning residues (pine branches, PB) and stumps (PS), tomato waste (TW), and winery wastewater (WW), for analyzing their potential within the biorefinery context. Volatiles were analyzed by gas-chromatography, and compounds with repellent/attractant properties were found for PB and PS, while flavor-enhancers were particularly identified in agrowastes. Composition analysis revealed that both TW and WW had the potential for biogas generation (BMP ∼340 and ∼250 NL CH4/kg VS, respectively), whereas forestry residues (PS and PB) can be recovered for thermal energy (HHV ∼20 MJ/kg) and bioethanol production (∼0.3−0.4 L/kg). Among all the aqueous extracts that were obtained, PS showed both the highest antioxidant activity (IC 50 ∼6 μg/mL) and total phenolic content (∼400 mg GAE/g extract). All residues were demonstrated to be promising for the Portuguese biobased economy.

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Preliminary biogas production assessment on insect frass and leachates of the organic wastes fed to larvae: A Johannesburg‐based factory case study

Rashama,

Motsetsi,

Christian

et al. 2024

Energy Science & Engineering

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The biomethane potential of insect frass and leachates from waste (larvae feedstock) stockpile was evaluated. Frass was derived from a black soldier fly larvae (BSFL) operation that uses a fruit and vegetable waste diet. The two waste streams were characterized and the results of their compositional, proximate, and ultimate analysis were used in estimating methane yields from these materials. The estimated biomethane potential (BMP) of the frass ranged 149–275 L/kgVS depending on the calculation method used. This result compares well with that of empirical studies for cow manure whose BMP ranges 110–275 L/kgVS. Cow manure is the most popular biogas feedstock globally. Leachates reported an estimated BMP of 150 L/kgCOD. We conclude that it may be technically feasible to produce biogas from BSFL frass and from fruit and vegetable waste leachates. However, standard BMP experiments and semicontinuous pilot studies are still necessary before commercialization of these findings. These extra tests are executed to validate these findings and ascertain the life cycle attribute and long‐term process stability and hence determine the economics of using these potential substrates for biogas production as a strategy to implementing circularity in the fruit and vegetable industry.

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Comparative analysis of methods and models for predicting biochemical methane potential of various organic substrates

Cited by 58 publications

References 30 publications

Bioenergy Production through Mono and Co-Digestion of Tomato Residues

Bioenergy Production through Mono and Co-Digestion of Tomato Residues

Assessment of Agroforestry Residues: Their Potential within the Biorefinery Context

Preliminary biogas production assessment on insect frass and leachates of the organic wastes fed to larvae: A Johannesburg‐based factory case study

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