Co-digestion of Laminaria digitata with cattle manure: A unimodel simulation study of both batch and continuous experiments

Sun, Hongyu; Kovalovszki, Adam; Tsapekos, Panagiotis; Alvarado-Morales, Merlin; Rudatis, Amata; Wu, Shubiao; Dong, Renjie; Kougias, Panagiotis; Angelidaki, Irini

doi:10.1016/j.biortech.2018.12.110

Cited by 22 publications

(13 citation statements)

References 45 publications

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“…The low biodegradability values obtained (Table 2) showed that the substrates used had a high complexity content. This result agrees with Sun et al (2019). They reported a 75% of biodegradability of Laminaria digitata during anaerobic assays.…”

Section: Discussionsupporting

confidence: 91%

“…In addition, the mentioned study also found an improvement in the biodegradability of different microalgae-OMSW mixtures compared with those obtained for the substrates separately. The biodegradability depends on the composition of the substrate used, being highly affected by the presence of organic compounds which are difficult to biodegrade, such as lignin (Sun et al 2019). During AD process of the single invasive macroalgae (1 R. okamurae-0 OMSW), a methane production of 177 ± 15 mL CH 4 g −1 VS was obtained, and at the end of the experiment, the biodegradability of the macroalgae was 77%.…”

Section: Discussionmentioning

confidence: 99%

“…Previous studies found that the methane production during the anaerobic digestion of brown algae is limited by the inaccessibility of bacteria to complex sugars (Thompson et al 2020). In addition, it should be considered that marine macroalgae tend to have a high content of salt, which can accumulate in the reactor, being able to achieve the inhibition concentration for the AD process (Ometto et al 2018;Sun et al 2019).…”

Section: Discussionmentioning

confidence: 99%

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Enhancing methane production from the invasive macroalga Rugulopteryx okamurae through anaerobic co-digestion with olive mill solid waste: process performance and kinetic analysis

et al. 2021

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The biomass valorisation of the invasive brown alga Rugulopteryx okamurae (Dictyotales, Phaeophyceae) is key to curbing the expansion of this invasive macroalga which is generating tonnes of biomass on southern Spain beaches. As a feasible alternative for the biomass management, anaerobic co-digestion is proposed in this study. Although the anaerobic digestion of macroalgae barely produced 177 mL of CH4 g−1 VS, the co-digestion with a C-rich substrate, such as the olive mill solid waste (OMSW, the main waste derived from the two-phase olive oil manufacturing process), improved the anaerobic digestion process. The mixture improved not only the methane yield, but also its biodegradability. The highest biodegradability was found in the mixture 1 R. okamurae—1 OMSW, which improved the biodegradability of the macroalgae by 12.9% and 38.1% for the OMSW. The highest methane yield was observed for the mixture 1 R. okamurae—3 OMSW, improving the methane production of macroalgae alone by 157% and the OMSW methane production by 8.6%. Two mathematical models were used to fit the experimental data of methane production time with the aim of assessing the processes and obtaining the kinetic constants of the anaerobic co-digestion of different combination of R. okamurae and OMSW and both substrates independently. First-order kinetic and the transference function models allowed for appropriately fitting the experimental results of methane production with digestion time. The specific rate constant, k (first-order model) for the mixture 1 R. okamurae- 1.5 OMSW, was 5.1 and 1.3 times higher than that obtained for the mono-digestion of single OMSW and the macroalga, respectively. In the same way, the transference function model revealed that the maximum methane production rate (Rmax) was also found for the mixture 1 R. okamurae—1.5 OMSW (30.4 mL CH4 g−1 VS day−1), which was 1.6 and 2.2 times higher than the corresponding to the mono-digestions of the single OMSW and sole R. okamurae (18.9 and 13.6 mL CH4 g−1 VS day−1), respectively.

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Section: Discussionsupporting

confidence: 91%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Enhancing methane production from the invasive macroalga Rugulopteryx okamurae through anaerobic co-digestion with olive mill solid waste: process performance and kinetic analysis

et al. 2021

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“…AD of cattle manure (CM) in combination with lignocellulosic waste has been proven by many studies to increase the methane yield obtained from the AD process. [38][39][40][41] In addition, there are a large number of studies on the anaerobic co-digestion of CM in the literature, along with food industry wastes, 42,43 municipal solid wastes, 31,32 fish-based wastes, 33 algae sludges, and wastewater sludges. 34…”

Section: Introductionmentioning

confidence: 99%

Enhancement in methane yield from anaerobic co‐digestion of walnut shells and cattle manure

Şenol

2020

Env Prog and Sustain Energy

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In this study, anaerobic co-digestion was investigated for mixtures of walnut shells (WS) and cattle manure (CM), which are lignocellulosic wastes, in various different carbon: nitrogen (C/N) ratios. The best mixing ratio for WS and CM in anaerobic digestion (AD) was determined to be 1:3, offering a methane yield of 173.2 ml/g volatile solid (VS) added. Effects of various alkaline pretreatments including calcium hydroxide (Ca(OH) 2), sodium hydroxide (NaOH) and potassium hydroxide (KOH) were studied in the concentration range 1-5% wt/wt for the best mixing ratio of WS and CM. The optimal KOH and NaOH concentrations were each found to be 4%, giving methane yields of 312.6 ± 5.1 and 342.5 ± 9.6 ml/g VS added , respectively, where these yields were found to increase by 80.5 and 97.2%, respectively, compared to the control reactor. By contrast, a 3% Ca(OH) 2 concentration was found to increase the methane yield by 67% compared to the untreated reactor. NaOH pretreatments resulted in relatively higher lignocellulosic solubilization and soluble chemical oxygen demand compared to KOH and Ca(OH) 2 pretreatments. This study contributes to our understanding of the alkaline pretreatment in taking advantage of CM and WS for methane productions in future applications.

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“…Although the difference between daily methane and biogas production kinetics using periodic and semi‐continuous operation modes is obvious, some authors (Kouas, Torrijos, Sousbie, Harmand, and Sayadi ()) state that data obtained by using periodic operation bioreactors can be successfully applied for prediction of biogas production results achieved by applying bioreactors operating at continuous or semi‐continuous mode. Zhao et al () and Sun, Kovalovszki, Tsapekos, and Alvarado‐morales () also investigated the models which can be applied for prediction of methane production using both the periodic and the continuous mode of anaerobic digestion. However, according to Facchin, Cavinato, Pavan, and Bolzonella () application of continuous and periodic bioreactors under the same conditions may lead to absolutely different results of methane production.…”

Section: Introductionmentioning

confidence: 99%

Experimental research of efficiency of semi‐continuous and periodic biogas production processes by using chicken manure bioloadings

Baltrėnas

Kolodynskij

2019

Water Environment Research

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Semi-continuous and periodic biogas production processes were investigated. Dry chicken manure containing 40.0 ± 0.5% volatile solids (VS) was used for the production of bioloading. Semi-continuous operation bioreactor and periodic bioreactor were used to implement research. Bioloading was additionally supplemented with newly prepared parts by removing 10% of decomposed mass and by adding the same amount of preheated mass every 7 days (semi-continuous process). The process was periodic when the mass was completely decomposed (after 45 days of the experiment) and fully removed (bioreactor was loaded with a new portion of raw material to 100% of the working volume again). Total duration of both experiments was 90 days. The results show that biogas production by semi-continuous process is more effective than periodic process due to higher total biogas yield (up to 39.7%) and higher methane yield (up to 33.5%). The maximum concentration of CH 4 was determined during the periodic biogas production process, but the difference was only up to 2.1% (68.9% and 66.8%, respectively). Since the produced biogas had quite high average CO 2 and H 2 S concentrations (<40.0% and 2.1 g/m 3 , respectively), it is recommended to use filter-adsorbers or biofilters. According to the results, semi-continuous type bioreactor is more effective than periodic. • Practitioner points• Maximum CH 4 concentration in biogas, produced during periodic process, is 2.1% higher than during the semi-continuous process. • Average CH 4 concentration in biogas, produced during periodic and semi-continuous process, reaches 52.7% and 53.0%, respectively. • Biogas and methane yield (during periodic process) is 39.7% and 33.5% lower than during the semi-continuous process. • CH 4 concentration decreases (after supplement) about 6.0%-7.0% (during the semicontinuous process), but increases to the next cyclic bioloading supplement. • Semi-continuous biogas production process is more efficient than periodic.

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Co-digestion of Laminaria digitata with cattle manure: A unimodel simulation study of both batch and continuous experiments

Cited by 22 publications

References 45 publications

Enhancing methane production from the invasive macroalga Rugulopteryx okamurae through anaerobic co-digestion with olive mill solid waste: process performance and kinetic analysis

Enhancing methane production from the invasive macroalga Rugulopteryx okamurae through anaerobic co-digestion with olive mill solid waste: process performance and kinetic analysis

Enhancement in methane yield from anaerobic co‐digestion of walnut shells and cattle manure

Experimental research of efficiency of semi‐continuous and periodic biogas production processes by using chicken manure bioloadings

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