Optimization of Methane Production from Rice Straw and Buffalo Dung by H2O2 and Ca(OH)2: Pretreatments and Its Kinetics

Noonari, A. Alam; Mahar, Rasool Bux; Sahito, Abdul Razaque; Brohi, Khan Muhammad

doi:10.1007/s12649-017-0102-z

Cited by 9 publications

(6 citation statements)

References 35 publications

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“…However, statistical analysis as nonlinear regression of fitted model is given in Table 2 Optimal pretreatments indicated that R 2 values were closer to one, which signs the model best fitted. Further, it represents the accuracy and reliability between and experimental findings and model prediction [7]. Generally, the growth of microbes played a vital role in AD for methane generation.…”

Section: Model Validation On Various Pretreatmentsmentioning

confidence: 99%

“…In literature, mostly reported about individual efficiency of pretreatment but there is no report which systematically compares the performance of these methods. The efficiency of pretreatment is not based on yield of methane, kinetic model fitness, but also the economic valuation and environmental performance [7,53]. Comparison concluded that pretreatment such as H 2 O 2 was toxic for methanogens due to acidic in nature.…”

Section: Economic and Environmental Performance Of H 2 O 2 Ca(oh) 2 Sio 2 And P Ostreatus Pretreatmentsmentioning

confidence: 99%

“…Anaerobic co-digestion is considered a fully matured practice to improve methane yield as compared with single anaerobic digestion. The benefits of co-digestion involve balancing the carbon to nitrogen (C:N) ratio, pH, hydraulic retention time (HRT), inhibition compound factors, and biodegradation [7]. However, crop residues have poor degradability because of recalcitrant structure.…”

Section: Introductionmentioning

confidence: 99%

“…The highest methane yield obtained was 168.9 NmLCH 4 /gVS from a 2 mm shredded size. Noonari et al [7] pretreated rice straw with six (0.1, 0.2, 0.3, 0.4, 0.5, and 0.6%) different concentrations of H 2 O 2 and Ca(OH) 2 . Ca(OH) 2 was comparatively better than H 2 O 2 and was able to improve methane production and volatile solid (VS) degradation.…”

Section: Introductionmentioning

confidence: 99%

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Various pretreatments of canola straw with hydrogen peroxide, calcium hydroxide, silica, and Pleurotus ostreatus to improve methane yield through anaerobic co-digestion

Noonari

Shah

Mirjat

et al. 2022

Biomass Conv. Bioref.

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Canola straw (CS) is the lignocellulosic biomass and is often managed by burning in Pakistan. Pretreatment is a well-established technique for partially disintegrating the crop residue to use in anaerobic digestion. The present study efforts were made to evaluate the effect of optimal pretreatment through comparison. CS was subjected to various pretreatments using H 2 O 2 , Ca(OH) 2 (concentrations), SiO 2 (nanoparticles), and P. ostreatus (incubation times) that were used as acidic, alkaline, catalyst, and biological pretreatments to enhance methane yield by anaerobic co-digestion. On the basis of 5 g volatile solids (VS), CS was mixed with buffalo dung (BD) at a ratio of 40:60. The batch was carried out in Semi-Automatic Methane Potential Test System (SAMPTS) under mesophilic conditions. Experimental findings observed that all pretreatments effectively improve methane production. Maximum methane yields of 417.3, 386.1, 381.0, and 238.6 mlCH 4 /gVS were obtained at 0.4% Ca(OH) 2 , 0.2% H 2 O 2 , 0.5 mg SiO 2 , and 30th day P. ostreatus respectively. However, the highest biodegradability (about 27.1%) was observed in the pretreatment of H 2 O 2 . In addition, optimal results were statistically analyzed (P < 0.05) and S-Gompertz model (SGM) was applied to the highest methane yields. Kinetics parameters indicated that the applied model was best fitted. Based on economic valuation and favorable for methanogens, Ca(OH) 2 pretreatment is recommended.

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Section: Model Validation On Various Pretreatmentsmentioning

confidence: 99%

Section: Economic and Environmental Performance Of H 2 O 2 Ca(oh) 2 Sio 2 And P Ostreatus Pretreatmentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Various pretreatments of canola straw with hydrogen peroxide, calcium hydroxide, silica, and Pleurotus ostreatus to improve methane yield through anaerobic co-digestion

Noonari

Shah

Mirjat

et al. 2022

Biomass Conv. Bioref.

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show abstract

“…This may be related to slightly higher lignin solubilization from NaOH pretreatment than from KOH 73 . Ca(OH) 2 applications are attractive, however, because of their economic suitability and being a low‐risk chemical in addition to good organic matter hydrolysis 74 . Moreover, Ca(OH) 2 reacts readily with carbon dioxide to form CaCO 3 in the reactor, thereby increasing the concentration of methane in the biogas 75 .…”

Section: Resultsmentioning

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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Evaluation, ranking, and selection of pretreatment methods for the conversion of biomass to biogas using multi-criteria decision-making approach

Vannarath

Thalla

2019

Environ Syst Decis

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Optimization of Methane Production from Rice Straw and Buffalo Dung by H2O2 and Ca(OH)2: Pretreatments and Its Kinetics

Cited by 9 publications

References 35 publications

Various pretreatments of canola straw with hydrogen peroxide, calcium hydroxide, silica, and Pleurotus ostreatus to improve methane yield through anaerobic co-digestion

Various pretreatments of canola straw with hydrogen peroxide, calcium hydroxide, silica, and Pleurotus ostreatus to improve methane yield through anaerobic co-digestion

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

Evaluation, ranking, and selection of pretreatment methods for the conversion of biomass to biogas using multi-criteria decision-making approach

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