02927nas a2200265   4500008004100000022001400041245012800055210006900183260008000252300002400332490000600356520189500362653002602257653003602283653002902319653002402348653002802372100002002400700001802420700002602438700002402464700002202488700002802510856012302538       2016                        eng d  a2190-573800aPretreatment and enzymatic process modification strategies to improve efficiency of sugar production from sugarcane bagasse0 aPretreatment and enzymatic process modification strategies to im  aTIERGARTENSTRASSE 17, D-69121 HEIDELBERG, GERMANYbSPRINGER HEIDELBERGcJUN  aArticle Number: 1260 v63 a<p>Pretreatment and enzymatic hydrolysis play a critical role in the economic production of sugars and fuels from lignocellulosic biomass. In this study, we evaluated diverse pilot-scale pretreatments and different post-pretreatment strategies for the production of fermentable sugars from sugarcane bagasse. For the pretreatment of bagasse at pilot-scale level, steam explosion without catalyst and combination of sulfuric and oxalic acids at low and high loadings were used. Subsequently, to enhance the efficiency of enzymatic hydrolysis of the pretreated bagasse, three different post-pretreatment process schemes were investigated. In the first scheme (Scheme 1), enzymatic hydrolysis was conducted on the whole pretreated slurry, without treatments such as washing or solid-liquid separation. In the second scheme (Scheme 2), the pretreated slurry was first pressure filtered to yield a solid and liquid phase. Following filtration, the separated liquid phase was remixed with the solid wet cake to generate slurry, which was then subsequently used for enzymatic hydrolysis. In the third scheme (Scheme 3), the pretreated slurry was washed with more water and filtered to obtain a solid and liquid phase, in which only the former was subjected to enzymatic hydrolysis. A 10 % higher enzymatic conversion was obtained in Scheme 2 than Scheme 1, while Scheme 3 resulted in only a 5-7 % increase due to additional washing unit operation and solid-liquid separation. Dynamic light scattering experiments conducted on post-pretreated bagasse indicate decrease of particle size due to solid-liquid separation involving pressure filtration provided increased the yield of C6 sugars. It is anticipated that different process modification methods used in this study before the enzymatic hydrolysis step can make the overall cellulosic ethanol process effective and possibly cost effective.</p>10aDilute acid treatment10aHigh-solid enzymatic hydrolysis10aPilot-scale pretreatment10aPressure filtration10aSolid-liquid separation1 aPal, Siddhartha1 aJoy, Shereena1 aTrimukhe, Kalpana, D.1 aKumbhar, Pramod, S.1 aVarma, Anjani, J.1 aPadmanabhan, Sasisanker  uhttps://library.ncl.res.in/content/pretreatment-and-enzymatic-process-modification-strategies-improve-efficiency-sugar