10472

9667

كارشناسي ارشد

مهندسي شيمي

اصفهان: دانشگاه صنعتي اصفهان ، دانشكده مهندسي شيمي

1394

دوازده، 64ص.: مصور، جدول، نمودار

كيخسرو كريمي، حميد زيلويي

1394/07/06

حميد اميري، پوران گلكار

1396/10/04

كتابنامه

مهندسي شيمي

مهندسي شيمي

ID9667

به فارسي و انگليسي

65 Isfahan University of Technology Department of Chemical Engineering Biogas production from waste textile By Elnaz HasanzadehAbstractDue to population growth and improving living standards in the past few decades fiberconsumption and consequently waste textile production was greatly increased Mainstrategies for waste textile management are landfill and incineration that caused manyenvironmental problems while main part of these wastes can be turned into biologicalproducts such as biogas Biogas is one of the leading biofuels that is produced byfermentation using anaerobic bacteria In the present study pretreatment of jean as a wastetextile with sodium carbonate solution was performed to increase the efficiency of biogasproduction reduce the crystallinity of cellulosic part and separate cotton fibers from thesynthetic part of textile i e polyester This alkaline pretreatment was performed on naturalcotton and waste textile samples using various concentration of sodium carbonate 0 0 5 and 1 M at different temperatures 50 100 and 150 C for 120 min Then the treated anduntreated materials were anaerobically digested to biogas The best improvement in the yieldof methane production was achieved by pretreatment using 0 5 M sodium carbonate at 150 C for 120 min giving a methane yield of 328 9 and 361 1 ml g VS after 40 days digestion Under these conditions polyester fibers were hydrolyzed and separated from the fabricstructure so that the percentage of cellulose in the solid remained after the pretreatment wasabout 91 The analysis showed that the alkali treatment can significantly increase waterabsorption ability remove impurities of cellulosic part reduce cellulose crystallinity andhydrolyses polyester fiber resulting in enhancement of biogas production The pretreatedsamples were also subjected to enzymatic hydrolysis using cellulase and glucosidase Thebest glucose yield by enzymatic hydrolysis was obtained as 88 0 for cotton and 79 6 and81 7 for textile whereas the best results for untreated cotton and textile samples were 36 9 and 28 0 respectively Then the best results of enzymatic hydrolysis were fermented bySaccharomyces cerevisiae The highest ethanol yield was 69 4 and 59 5 for cotton andtextile respectively Keywords Biogas cotton enzymatic hydrolysis sodium carbonate و textile

كيخسرو كريمي، حميد زيلويي

حميد اميري، پوران گلكار