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- 저자 : Kannah, R. Yukesh (검색결과 3 건)
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Synergetic effect of combined pretreatment for energy efficient biogas generation
Kannah, R. Yukesh,Kavitha, S.,Rajesh Banu, J.,Yeom, Ick Tae,Johnson, M. Elsevier 2017 Bioresource technology Vol.232 No.-
<P><B>Abstract</B></P> <P>Physiochemical disintegration of waste activated biosolids (WAB) through thermochemical (TC) pretreatment requires high energy and cost for efficient energy generation. Therefore in the present study, an attempt has been made to enhance the biodegrdability and to minimize the operational cost of TC pretreatment by combining it with ozonation. A higher solubilization of about 30.4% was achieved at lesser energy input of about 141.02kJ/kgTS and a ozone dosage of about 0.0012mgO<SUB>3</SUB>/mgSS through this combined thermo chemo ozone (TCO<SUB>3</SUB>) pretreatment. The methane production potential (0.32gCOD/gCOD) of TCO<SUB>3</SUB> pretreatment was comparatively higher than the (0.19gCOD/gCOD) TC pretreatment. The energetic analysis and economic assessment of the proposed method of pretreatment can possibly reduces the energy requirement of TC pretreatment with a positive net profit of about 35.49$/ton of biosolids.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Combined TCO<SUB>3</SUB> pretreatment improves disintegration of WAB effectually. </LI> <LI> This novel method aid solubilization at lesser specific energy of 141.02kJ/kgTS. </LI> <LI> COD solubilization of about 30.4% was achieved in 0.0012mgO<SUB>3</SUB>/mgVS ozone dosage. </LI> <LI> Highest methane yield of 0.32gCOD/gCOD was observed in TCO<SUB>3</SUB> pretreated biosolids. </LI> <LI> Combinative pretreatment offers a net profit of about 35.49$/ton of WAB. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
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Banu, J. Rajesh,Kannah, R. Yukesh,Kavitha, S.,Gunasekaran, M.,Yeom, Ick Tae,Kumar, Gopalakrishnan Elsevier 2018 CHEMICAL ENGINEERING JOURNAL -LAUSANNE- Vol.347 No.-
<P><B>Abstract</B></P> <P>The present study highlights the options to enhance the methane potential of partially digested anaerobic sludge using disperser-induced bacterial disintegration. Floc dispersion with no biomass disintegration was achieved at a disperser-specific energy input of 9.5 kJ/kg TS. The outcomes of both sole bacterial disintegration (S-BD) and disperser-induced bacterial disintegration (D-BD) were assessed in terms of changes in lysate, biopolymer release and increase in biodegradability and methane generation. A higher lysate solubilization of about 22.4% was achieved in D-BD compared to S-BD (11.3%), indicating the efficiency of floc dispersion prior to bacterial disintegration. The biochemical methane result implies that D-BD shows higher methane potential of 0. 279 gCOD/gCOD. Considering the overall outcome achieved in this study, disperser-induced bacterial disintegration is proved to be an effective disintegration process for enhanced biodegradation and higher methane production.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Disintegration of digested sludge is a promising technique for bioenergy generation. </LI> <LI> Floc dispersion was achieved at lesser disperser input energy of 9.5 kJ/kg TS. </LI> <LI> A higher lysate solubilization of 22.4% was achieved in floc dispersed sample. </LI> <LI> Biopolymer release of floc dispersed sludge was higher (1379.8 and 394.2 mg/L) </LI> <LI> Result of methane reveals the effect of floc dispersion prior to disintegration. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
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Rajesh Banu, J.,Sugitha, S.,Kannah, R. Yukesh,Kavitha, S.,Yeom, Ick Tae Elsevier 2018 Bioresource technology Vol.255 No.-
<P><B>Abstract</B></P> <P>The present study concerns the liquefying potential of an unusual source of lignocellulosic biomass (<I>Marsilea</I> spp., water clover, an aquatic fern) during combinative pretreatment. The focus was on how the pretreatment affects the biodegradability, methane production, and profitability of thermochemical dispersion disintegration (TCDD) based on liquefaction and soluble lignin. The TCDD process was effective at 12,000 rpm and 11 min under the optimized thermochemical conditions (80 °C and pH 11). The results from biodegradability tests imply that 30% liquefaction was sufficient to achieve enhanced biodegradability of about 0.280 g-COD/g-COD. When biodegradability was >30% inhibition was observed (0.267 and 0.264 g-COD/g-COD at 35–40% liquefaction) due to higher soluble lignin release (4.53–4.95 g/L). Scalable studies revealed that achievement of 30% liquefaction was beneficial in terms of the energy and cost benefit ratios (0.956 and 1.02), when compared to other choices.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Novel lignocellulosic biomass, <I>Marsilea quadrifolia</I> was exploited to get energy. </LI> <LI> First study to evaluate the effect of liquefaction and lignin on biodegradability. </LI> <LI> Energy spent to obtain 20–30% liquefaction was very low compared to others. </LI> <LI> Inhibition of biodegradability occured for samples with 35–40% liquefaction. </LI> <LI> Cost analysis reveals that achievement of 30% liquefaction was profitable. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
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