在软小麦产品(SWPs)的制造过程中会产生大量的工艺废物,如饼干/饼干,饼干,晶圆,还有蛋糕.一小部分废物被重新用于特定的饼干中,而其余的通常被丢弃。这项研究旨在研究这种废物对共同生产生物乙醇和脂肪酸甲酯(FAME或生物柴油)的适用性。研究中包括了SWP行业产生的两组废物:(a)低水分(<10%)饼干的废物,饼干,和没有填充物和/或涂层的威化片,及(b)高水分(>10%)饼干的废物,饼干,晶圆,和带有填充物和/或涂层的蛋糕。这项研究涉及用己烷提取每个样品,回收的脂肪通过碱催化的酯交换反应转化为FAME。然后通过淀粉水解和酵母发酵将剩余的富含碳水化合物的部分转化为生物乙醇。从废物中提取了大部分(92.42%-93.17%)脂肪,并以足够的产量转化为FAME(13.81-14.55gFAME/g废物,dm)和可接受的转换效率(85.19%-89.04%)。然而,从脱脂富含碳水化合物的馏分生产生物乙醇进行得相当缓慢,仅产生16.54-18.02(每克废物g乙醇,dm),对应的发酵效率从43.32%到48.29%不等。在共同生产FAME和乙醇时,相当数量(50.93%-53.08%)的废物固体留在残渣部分中。ThesefindingsindicatedthatproductionoftheFAMEwithadequateyieldandconversionefficienciesisliablefromtheSWPindustrywastes;however,生物乙醇产量和发酵效率相当有限,这需要进一步调查。实际应用:软麦加工业产生的废物占总产量的1%-5%。研究了该废物以生产FAME和生物乙醇。从废物中提取脂肪并转化为FAME。由于SWP生产中使用的面团改性剂和抗微生物添加剂,生物乙醇产量和发酵效率受到限制。需要进一步研究以提高乙醇产率。
A substantial amount of process
waste is generated during the manufacture of soft-wheat products (SWPs), such as biscuits/cookies, crackers, wafers, and cakes. A small portion of
waste is reused in specific biscuits, whereas the rest is usually discarded. This study aimed to investigate the suitability of this waste for the co-production of bioethanol and fatty acid methyl esters (FAMEs or biodiesel). Two groups of
waste generated in the SWP industry were included in the study: (a) the
waste of low-moisture (<10%) biscuits, crackers, and wafer sheets with no fillings and/or coatings, and (b) the waste of high-moisture (>10%) biscuits, crackers, wafers, and cakes with fillings and/or coatings. The study involved extracting each sample with hexane, and the recovered fat was converted to the FAME through alkali-catalyzed transesterification. The remaining carbohydrate-rich fraction was then converted to bioethanol through amylolytic hydrolysis and yeast fermentation. A great portion (92.42%-93.17%) of the fat was extracted from the wastes and converted to the FAME with adequate yields (13.81-14.55 g FAME/g waste, dm) and acceptable conversion efficiencies (85.19%-89.04%). However, bioethanol production from the defatted carbohydrate-rich fractions proceeded rather slowly, yielding only 16.54-18.02 (g ethanol per g of waste, dm), corresponding to fermentation efficiencies ranging from 43.32% to 48.29%. Upon the co-production of FAME and ethanol, a considerable amount (50.93%-53.08%) of waste solids remained in the residue fraction. These findings indicated that production of the FAME with adequate yields and conversion efficiencies is viable from the SWP industry wastes; however, bioethanol yields and fermentation efficiencies are rather limited, which warrants further investigation. PRACTICAL APPLICATION: The soft-wheat processing industry generates 1%-5% of total production as waste. The
waste was studied to produce FAME and bioethanol. The fat was extracted from the
waste and converted to FAME. Bioethanol yields and fermentation efficiencies are limited due to dough modifiers and antimicrobial additives used in SWP production. Further research is required to improve ethanol yield.