02026nas a2200253   4500008004100000022001400041245019800055210006900253260000800322490000700330520102100337653003401358653003401392653001801426653002201444653003301466100002701499700003501526700001801561700001901579700001801598700003001616856012601646       2023                        eng d  a2190-681500aComparative studies of the influence of particle size on various pretreatments of rice husk by assessment of chemical and structural components and wastewater characteristics of liquid fraction0 aComparative studies of the influence of particle size on various  cAPR0 v133 a<p>The dilute acid (DA), steam explosion (SE), and a 2-step: steam explosion followed by alkali (SEA) were evaluated for pretreatment of rice husk. The maximum hemicellulose and lignin removal via degradation and dissolution was observed for SEA pretreatment, enabling higher cellulose enrichment (up to 44% w/w) and recovery (up to 78%). The hemicellulose solubilization was &gt;90% for all the pretreatments, while maximum lignin removal (up to 62%) was observed for SEA pretreatment. The particle size in the range of 0.3-0.6 mm enabled higher pretreatment efficiencies in terms of cellulose enrichment. The liquid fraction obtained after DA pretreatment indicated higher COD values (20800-24440 mg/L) as compared to SEA (7800-11400 mg/L) due to lower cellulose recoveries in DAP (54-68%). SEM analysis of the biomass indicated disrupted regions with multiple pores. FTIR analysis revealed cleavage of lignin side chains, and XRD analysis confirmed the increase in cellulose crystallinity post-pretreatment.</p>
10aLignocellulosic crop residues10aLiquid-waste characterization10aParticle size10aRice husk biomass10aSteam explosion pretreatment1 aShahabazuddin, Mohmmad1 aBanuvalli, Bhavana, Karibasapp1 aMulik, Nagesh1 aPande, Ashwini1 aBokade, Vijay1 aMudliar, Sandeep, Narayan  uhttps://library.ncl.res.in/content/comparative-studies-influence-particle-size-various-pretreatments-rice-husk-assessment