Effect of hydrothermal and Ca(OH)2 pretreatments on anaerobic digestion of sugarcane bagasse for biogas production

Mustafa, Ahmed M.; Li, Hui; Radwan, Amira; Sheng, Kuichuan; Chen, Xiang

doi:10.1016/j.biortech.2018.03.028

Cited by 106 publications

(38 citation statements)

References 30 publications

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“…Especially, the co-digestion of swine manure and Treat-CSB showed higher methane yield of 322 mL/g VS, whereas those with Treat-CSC and Treat-CSD only produced methane yields of 286 and 249 mL/g VS, respectively. When the sugarcane bagasse pretreated with 8.5% Ca(OH) 2 was digested, 47% higher methane yield was obtained comparing to that of the digestion of the untreated [27]. The similar methane yield (212~340 mL/g VS) was also obtained from the anaerobic digestion of CS as a single feedstock [49,50].…”

Section: Anaerobic Co-digestionmentioning

confidence: 75%

“…The considerable loss of cellulose and hemicellulose was also reported during NaOH pretreatment [5]. Although 86.1% lignin was removed by NaOH pretreatment, 93.8% hemicellulose that could be converted to sugar was lost at the same time [27].…”

Section: Introductionmentioning

confidence: 72%

“…Regarding the Ca(OH) 2 dose in pretreatment, a ratio of Ca(OH) 2 to NaOH of 7%~10% was reported to be the optimum for the pretreatment of extruded rice straw [29]. Degradation of 44% of lignin was also observed when sugarcane bagasse was pretreated by 8.5% Ca(OH) 2 [27]. In another study, 10% Ca(OH) 2 and an isothermal treatment time of 106.3 min could extract 70% of lignin from the hydrothermally treated sweet sorghum bagasse [30].…”

Section: Introductionmentioning

confidence: 99%

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Effects of Corn Stover Pretreated with NaOH and CaO on Anaerobic Co-Digestion of Swine Manure and Corn Stover

et al. 2018

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: In this study, effects of pretreatment of corn stover (CS) with sodium hydroxide (NaOH) combined with calcium oxide (CaO) on anaerobic co-digestion of swine manure and CS for biogas production were investigated. Different pretreated-CSs were prepared by adding different doses of NaOH and CaO to CS: Treat-CSA (0.10 g NaOH/g CS), Treat-CSB((0.075 g NaOH + 0.05 g CaO)/g CS), Treat-CSC ((0.05 g NaOH + 0.05 g CaO)/g CS), and Treat-CSD ((0.025 g NaOH + 0.1 g CaO)/g CS). Lignin removal rate, biomass recovery, reduced sugar, methane yield, DT80 (digestion time when biogas achieved 80% of the total biogas), composition of residues, and cost-efficiency were measured to characterize CS after pretreatment and to evaluate the performance of co-digestors fed with swine manure and differently-pretreated CS. The results showed that Treat-CSB showed an excellent lignin removal efficiency and biomass recovery, resulting in the highest methane yield in its co-digestion with swine manure. Since the net benefit of Treat-CSB was calculated to be the highest (i.e., $1.89/ton total solids), therefore, we believe the co-digestion of Treat-CSB and swine manure for biogas production be an effective valorization option for the wastes.

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Section: Anaerobic Co-digestionmentioning

confidence: 75%

Section: Introductionmentioning

confidence: 72%

Section: Introductionmentioning

confidence: 99%

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Effects of Corn Stover Pretreated with NaOH and CaO on Anaerobic Co-Digestion of Swine Manure and Corn Stover

et al. 2018

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“…During MP, microorganisms are partially exposed to O2 or air under moderate operating conditions such as temperature and pressure. MP has also minimal enzyme and energy requirements (Mustafa et al, 2018). The process is designed to promote the hydrolysis stage through stimulation of cell growth and activity (Wagner et al, 2018).…”

Section: Pretreatment Methods Observations Referencementioning

confidence: 99%

Comparison of pretreatment methods that enhance biomethane production from crop residues - a systematic review

et al. 2019

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“…This phenomenon may be because Ca 2+ accumulation leads to precipitation of calcium salts, which may be due to decreased activity of the methanogenic archaea. 70 In this case, the optimal concentration for Ca(OH) 2 was chosen as 3%. This result can be attributed to the fact that Ca(OH) 2 is a relatively weaker base compared to other alkalis such as KOH and NaOH and recovers more degradable organic materials due to its low solubility.…”

Section: Effects Of Alkaline Pretreatment On Methane Yieldsmentioning

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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Effect of hydrothermal and Ca(OH)2 pretreatments on anaerobic digestion of sugarcane bagasse for biogas production

Cited by 106 publications

References 30 publications

Effects of Corn Stover Pretreated with NaOH and CaO on Anaerobic Co-Digestion of Swine Manure and Corn Stover

Effects of Corn Stover Pretreated with NaOH and CaO on Anaerobic Co-Digestion of Swine Manure and Corn Stover

Comparison of pretreatment methods that enhance biomethane production from crop residues - a systematic review

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

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