DOWNSTREAM PROCESSING FOR XYLITOL PRODUCTION OF EMPTY PALM FRUIT BUNCHES BY MEMBRANE PROCESS.

• Main Author: DESIRIANI (NIM: 23015018), RIA
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/23938
• Institution: Institut Teknologi Bandung

Empty palm fruit bunches (EFB) is one of waste palm oils industries which have a lot <br /> <br /> <br /> many potential. Empty palm fruit bunches contains high hemicellulose which can be <br /> <br /> <br /> treated to become high product commercial, such as xylitol. Xylitol is sugar alcohol, <br /> <br /> <br /> it can be used as diabetic sugar. Xylitol can produce in two ways, chemical and <br /> <br /> <br /> biological. Production of xylitol by chemical process has some weakness, such as <br /> <br /> <br /> need a high pressure, so biological process will be alternative method for xylitol <br /> <br /> <br /> production. <br /> <br /> <br /> In biological processes, lignocellulose was hydrolysate with xylanase enzyme, then <br /> <br /> <br /> hydrolysate solution was process again by fermentation process with D.hansenii. So <br /> <br /> <br /> fermentation broth was produced. In this experiment, model fermentation broth was <br /> <br /> <br /> also produced with xylose as substrate and model permeate ultrafiltration broth. <br /> <br /> <br /> Besides consist xylitol, fermentation hydrolysis solutions still contain others product, <br /> <br /> <br /> such as ethanol, organic acids, and other chemical compounds. Therefore some <br /> <br /> <br /> technology is required for eliminate other product. <br /> <br /> <br /> Downstream processing with membrane process become alternative method to <br /> <br /> <br /> concentrate xylitol from fermentation hydrolysis of empty palm fruit bunches <br /> <br /> <br /> solutions. This process used three kinds of membrane, there are ultrafiltration (UF), <br /> <br /> <br /> UF tight and nanofiltration (NF). Microorganisms can be remove 99% from model <br /> <br /> <br /> fermentation broth and xylitol concentration increase 4,9 gr/L &#8594; 6,07 gr/L &#8594; 9,34 <br /> <br /> <br /> gr/L by UF and NF, but microorganisms was still detected when separation with <br /> <br /> <br /> centrifugation process and NF. And microorganism and colour were also decreased <br /> <br /> <br /> from fermentation hydrolysate EFB broth. High concentration of xylitol was achieved <br /> <br /> <br /> by model permeate UF, it is 3,32 gr/L to 10,97 gr/L.