Abstract
<p class="IsiAbstrakInggris"><span>Bacterial cellulose is a biopolymer </span><span lang="EN-GB">produced by fermentation process with the help of bacteria. It </span><span>has numerous applications in industrial sector with its characteristic as a biodegradable and nontoxic compound in nature. </span><span lang="EN-GB">The potential application of BC is limited by its production costs, because BC is produced from expensive culture media. The use of cheap carbon and nutrient sources such as sago liquid waste is an interesting strategy to overcome this limitation. The objective of this study was to obtain the AAB strain that capable to produce bacterial cellulose from sago liquid waste. Isolation of AAB strains was conducted using CARR media and the screening of BC production was performed on Hestrin-Schramm (HS) media with glucose as a carbon source. The strains of AAB then were evaluated for their cellulose-producing capability using sago liquid waste as a substrate. Thirteen strains of AAB producing BC were isolated from pineapple waste (pineapple core and peel) and seven of them were capable to produce BC using sago liquid waste substrate. One of the AAB strains produced a relatively high BC, i.e. isolate LKN6. The result of morphological and biochemical test was proven that the bacteria was </span><em><span>Acetobacter xylinum</span></em><span lang="EN-GB">. The result of this study showed that </span><em><span>A. xylinum </span></em><span lang="EN-GB">LKN6 can produce a high yield of BC, therefore this strain is potentially useful for its utilization as a starter in bacterial cellulose production. </span></p>
Highlights
Acetic acid bacteria (AAB) are obligately aerobic bacteria within the family of Acetobacteraceae, widespread in sugary, acidic and alcoholic niches (Mamlouk & Gullo, 2013)
Acetic acid bacteria were successfully isolated from pineapple wastes
Result of this study showed that LKN6 isolate can be used as a starter for bacterial cellulose production with industrial waste containing polysaccharides as a substrate
Summary
Acetic acid bacteria (AAB) are obligately aerobic bacteria within the family of Acetobacteraceae, widespread in sugary, acidic and alcoholic niches (Mamlouk & Gullo, 2013). A recent classification of the acetic acid bacteria includes the genera of Acetobacter, Acidomonas, Ameyamaea, Asaia, Gluconacetobacter, Gluconobacter, Granulibacter, Kozakia, Neoasaia, Neokomagataea, Saccharibacter, Swaminathania and Tanticharoenia. Pineapple waste contains a high organic acid (Hemalatha & Anbuselvi, 2013) that creates an acidic niche. Pineapple waste is a good source for isolation of AAB. Some of the Acetic acid bacteria from genera of Acetobacter and Gluconacetobacter are known to produce cellulose in culture (Mamlouk & Gullo, 2013). The structural features and mechanical properties of bacterial cellulose differ from those of plant cellulose, due to its high purity, hydrophilicity, structure forming potential, chirality and biocompatibility offers a wide range of special applications, such as a food matrix (nata de coco), dietary fiber, as an acoustic or filter membrane, as ultra-strength paper and as reticulated fine fiber network with coating (Chawla et al, 2009; Keshk, 2014)
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