دانلود رایگان مقاله انگلیسی بازیابی اسید لاکتیک و سایر اسید های ارگانیک از آبکشی تخمیر اتانول مواد زائد خوراکی پروتئین - الزویر 2019

عنوان فارسی
بازیابی اسید لاکتیک و سایر اسید های ارگانیک از آبکشی تخمیر اتانول مواد زائد خوراکی پروتئین : امکان سنجی و اثرات بستر
عنوان انگلیسی
Recovery of lactic acid and other organic acids from food waste ethanol fermentation stillage: Feasibility and effects of substrates
صفحات مقاله فارسی
0
صفحات مقاله انگلیسی
6
سال انتشار
2019
نشریه
الزویر - Elsevier
فرمت مقاله انگلیسی
PDF
نوع مقاله
ISI
نوع نگارش
مقالات پژوهشی (تحقیقاتی)
رفرنس
دارد
پایگاه
اسکوپوس
کد محصول
E9479
رشته های مرتبط با این مقاله
زیست شناسی
گرایش های مرتبط با این مقاله
علوم سلولی و مولکولی، علوم گیاهی
مجله
فناوری جداسازی و تصفیه - Separation and Purification Technology
دانشگاه
Department of Environmental Engineering - University of Science and Technology Beijing - China
کلمات کلیدی
اسید لاکتیک، الکترو دیالیز غشای دو قطبی، زباله های مواد غذایی، تخمیر اتانول
doi یا شناسه دیجیتال
https://doi.org/10.1016/j.seppur.2018.07.031
چکیده

ABSTRACT


Recycling ethanol fermentation stillage from food waste could help to resolve the pollution problems, but it would lead to the accumulation of lactic acid (LA), which had a negative effect on ethanol fermentation. In this study, bipolar membrane electrodialysis was used to recover LA as well as other fatty acids in the stillage, and the corresponding parameters that affected this process were investigated. Pretreatment via centrifugation and ultrafiltration reduced the turbidity successfully. Experiments on simulated and real stillage showed that organic acids such as formic acid and acetic acid had a slight effect on the separation of LA, but the existence of chloride ions could form strong anion competition with lactate ions. Simulation experiments with sodium chloride reduced the recovery of LA from 98% to 92%. The recovery rate of LA from real stillage could reach 71.2%. After electrodialysis, the stillage can be reused in ethanol fermentation, the fermentation time was shortened to 24 h, and the ethanol yield increased.

نتیجه گیری

4. Conclusion


BMED is an effective way to extract LA from the stillage. The combination of centrifugation and UF can be used to remove impurities such as suspended solids in the stillage. The recovery rate of LA from stillage can reach 71.2%, lower than that of the simulated stillage, due to the presence of anion impurity in the stillage, which forms a competitive relationship with lactate ions. After electrodialysis, the stillage can be reused in ethanol fermentation, the fermentation time was shortened to 24 h, and the ethanol yield increased.


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