Influence of leaching pretreatment on fuel properties of biomass

Yu, Chao; Thy, P.; Wang, Lianguo; Anderson, Stanley; VanderGheynst, Jean S.; Upadhyaya, Shrinivasa K.; Jenkins, Bryan M.

doi:10.1016/j.fuproc.2014.06.030

Cited by 115 publications

(94 citation statements)

References 43 publications

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“…The relative ease of leaching of K and Cl from the untorrefied Jatropha is consistent with results from leaching studies conducted on other types of biomass -wheat straw [13], rice straw [9,12,13], olive-derived biomass [3], grassland herbage [27], switchgrass [15]. The extent to which these elements are removed by leaching is related to the mode in which they occur in the structure of the biomass.…”

Section: K and CLsupporting

confidence: 80%

“…However, most laboratory-based investigations employ soaking, i.e. submerging the biomass in water for a specific period of time [3,[10][11][12][13][14][15]. This method is favoured in laboratory-scale studies since it is simple to implement and allows variables such as the leaching time and/or water temperature to be controlled and hence their effect on the leaching efficacy investigated.…”

Section: Introductionmentioning

confidence: 99%

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Leaching as a Pretreatment Process to Complement Torrefaction in Improving Co-firing Characteristics of Jatropha curcas Seed Cake

Madanayake

Gan

Eastwick

et al. 2015

Waste Biomass Valor

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(2016) Leaching as a pretreatment process to complement torrefaction in improving co-firing characteristics of Jatropha curcas seed cake. Waste and Biomass Valorization, 7 (3 A note on versions:The version presented here may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the repository url above for details on accessing the published version and note that access may require a subscription. AbstractThe presence of certain inorganic elements in biomass causes issues such as slagging, fouling and corrosion when co-firing with coal for power generation. In this work, the efficacy of leaching to remove these elements from Jatropha curcas seed cake was investigated. Leaching of both untorrefied and torrefied seed cakes was carried out in Milli-Q water at temperatures of 20 0 C, 35 0 C and 50 0 C. At 20 0 C, the two critical elements, potassium and chlorine, decreased by as much as 85% and 97%, respectively. Leaching at higher temperatures was only beneficial for the more intensely-torrefied biomass, since they were more resistant to leaching. The electrical 24 conductivity and ion content of the leachates were measured, as were the inorganic elemental content, dry ash content, volatile matter content and higher heating value (HHV) of the solid seed cake. A secondary benefit of the leaching was an increase in the HHV by up to 10%.

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Section: K and CLsupporting

confidence: 80%

Section: Introductionmentioning

confidence: 99%

Leaching as a Pretreatment Process to Complement Torrefaction in Improving Co-firing Characteristics of Jatropha curcas Seed Cake

Madanayake

Gan

Eastwick

et al. 2015

Waste Biomass Valor

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“…Shimadzu RID (10A) and PDA (20A) detectors were used. Suppressed cation chromatography was performed using a 4 × 250 mm CS14 column (Dionex), CERS500 suppressor, and Shimadzu conductivity detector (CDD-10AVP) based on the method described by Yu et al 43 Mobile phase was 10 mM methanesulfonic acid in MilliQ water with a flow rate of 1 mL/ min. Anion chromatography was performed using a 4 × 250 mm AS22 column (Dionex), AERS500 suppressor, and conductivity detector.…”

Section: Viable Bacterial Counts In Wastewatermentioning

confidence: 99%

Algal–bacterial synergy in treatment of winery wastewater

et al. 2018

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There is significant potential for employing algae in tertiary wastewater treatment, however, little is known about the contribution of algae-bacteria synergy toward treatment performance. This study demonstrates potential synergy in the treatment of three winery wastewater samples. Two strains of green algae, Auxenochlorella protothecoides and Chlorella sorokiniana were tested and each removed > 90% of nitrogen, > 50% of phosphate, and 100% of acetic acid in the wastewater. Both algae strains grew significantly faster on wastewaters compared to growth on minimal media. Organic carbon in the wastewater apparently played a limited role in algal growth enhancement. When cultured on sterile-filtered wastewater, A. protothecoides increased soluble COD loadings in two of the three wastewaters and C. sorokiniana secreted an insoluble film. Culturing algae with the native wastewater microbial community negated the secretion of algal photosynthate, allowing for simultaneous reductions in COD and nutrient concentrations. Both algae species stimulated bacterial growth in a strain-specific way, suggesting unique responses to algal photosynthate. Cofactor auxotrophy for thiamine, cobalamin, and biotin is widespread among algae and these cofactors are typically obtained from bacteria. Sequencing the wastewater microbial community revealed bacteria capable of synthesizing all three cofactors while liquid chromatography with mass spectrometry (LCMS) and bio-assays revealed the presence of thiamine metabolites in the wastewaters. These cofactors likely increased algal growth rates, particularly for A. protothecoides, which cannot synthesize thiamine de-novo but can salvage it from degradation products. Collectively, these results demonstrate that bacteria and algae provided synergistic growth benefits, potentially contributing to higher levels of wastewater treatment than either organism type alone.

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“…The biochar sample was soaked with the washing agent (DW, 0.5 mol/L AA and CA) in a closed beaker (biochar/washing agent = 1/50 (g/ml)) and then the mixture was stirred at 250 rpm for 10 min at room temperature [15,20]. Subsequently, the washed biochars were recovered by centrifuge and dried at 105°C for 24 h for later analysis.…”

Section: Washing Treatmentmentioning

confidence: 99%