Abstract

<p id="E1724" class="x-scope qowt-word-para-7"><span id="E1725" class="qowt-font1-TimesNewRoman">Improper oil waste management contributes to environmental degradation, notably water pollution. Because conventional methods for treating oil pollutants are costly and have limited removal efficacy, the use of natural adsorbent</span><span id="E1726" class="qowt-font1-TimesNewRoman">s</span><span id="E1727" class="qowt-font1-TimesNewRoman"> is recommended due to </span><span id="E1728" class="qowt-font1-TimesNewRoman">their</span><span id="E1729" class="qowt-font1-TimesNewRoman"> dependability and affordability. </span><span id="E1730" class="qowt-font1-TimesNewRoman">The purpose of this study was to see how modified cassava starch affected oil adsorption using two types of enzymes: Brevibacterium sp amylase enzymes derived from Indonesian marine bacteria and commercial amylase enzyme (Dextrozyme® GA).</span><span id="E1732" class="qowt-font1-TimesNewRoman">Oil-adsor</span><span id="E1733" class="qowt-font1-TimesNewRoman">p</span><span id="E1734" class="qowt-font1-TimesNewRoman">tion</span><span id="E1735" class="qowt-font1-TimesNewRoman"> degree is applied to several types of oil, including palm oil and olive oil. The findings revealed that the properties of modified starch differed from those of native starch in both physical and chemical terms. The modified starch produced by hydrolysis of the glucoamylase enzyme (Dextrozyme ® GA)</span><span id="E1737" class="qowt-font1-TimesNewRoman">had a yield of 80.16 %, reducing sugar content of 0.</span><span id="E1738" class="qowt-font1-TimesNewRoman">20</span><span id="E1739" class="qowt-font1-TimesNewRoman"> g/L at 24 h, and a particle size of 377 nm, which is lower than the starch hydrolyzed by Brevibacterium sp.</span><span id="E1740" class="qowt-font1-TimesNewRoman"> In contrast</span><span id="E1741" class="qowt-font1-TimesNewRoman">,</span><span id="E1742" class="qowt-font1-TimesNewRoman"> the degree of oil adsorption in the glucoamylase enzyme (Dextrozyme ® GA) </span><span id="E1743" class="qowt-font1-TimesNewRoman">is </span><span id="E1744" class="qowt-font1-TimesNewRoman">higher than Brevibacterium sp. Statistical analysis showed that the oil adsorption degree is affected by the type of enzyme, therefore, the modified starch from Brevibacterium sp still need</span><span id="E1745" class="qowt-font1-TimesNewRoman">s</span><span id="E1746" class="qowt-font1-TimesNewRoman"> improvement to be competitive for oil adsorption compare</span><span id="E1747" class="qowt-font1-TimesNewRoman">d</span><span id="E1748" class="qowt-font1-TimesNewRoman"> with the modified starch from the glucoamylase enzyme (Dextrozyme ® GA).</span></p>

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