通过生物加工将纸质和富含食物的城市固体废物转化为乙醇,ACS Sustainable Chemistry & Engineering

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通过生物加工将纸质和富含食物的城市固体废物转化为乙醇
ACS Sustainable Chemistry & Engineering ( IF 8.4 ) Pub Date : 2020-11-02 , DOI: 10.1021/acssuschemeng.0c05923
Jipeng Yan ₁ , Ling Liang ₁ , Qian He ₁ , Carolina Gutierrez ₁ , Chia-Hsi Chu ₂ , Todd R. Pray ₁ , Ning Sun ₁

Affiliation

本文提供了一种通过集成生物处理将垃圾填埋场指定的城市固体废物（城市生活垃圾，富含纸张和食物丰富的垃圾）转化为生物产品的方法，也是提高城市生活垃圾转移率以减少环境压力的一种方法。对收集的MSW样品进行成分分析，细菌群落分析，均质化，酶水解和酵母发酵。结果表明，基于两种类型的城市固体废弃物流，根据其丰度，碳水化合物组成和生物转化产量，它们是生物精炼厂的潜在原料来源。将选定的酶混合物加到均质的底物中可在水解物中共同产生C6 / C5糖和有机酸。在富含纸张的MSW衍生的水解产物（PDH）中获得了最高81％的葡萄糖和100％的木糖产率。葡萄糖产量为96。在富含食物的MSW来源的水解产物（FDH）中获得了7％。PDH和FDH中的糖很容易发酵，无需解毒和固体分离。初步发酵分别从PDH获得17.7 g / L乙醇（理论产率为69.4％）和从FDH获得8.9 g / L乙醇（理论产率为70.3％），两者均与用作Avicel的水解产物（理论产率为67.6％）相当。控制。

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Conversion of Paper and Food-rich Municipal Solid Waste Streams to Ethanol through Bioprocessing

This article provides a method to convert landfill-designated municipal solid waste (MSW, paper-rich and food-rich) to bioproducts through integrated bioprocessing, also a way of improving the MSW diversion rate to reduce environmental stress. Compositional analysis, bacterial community profiling, homogenization, enzymatic hydrolysis, and yeast fermentation were performed on the collected MSW samples. Results show that these two types of MSW streams are potential feedstock sources for biorefineries based on their abundance, carbohydrate composition, and bioconversion yield. Addition of selected enzyme cocktails to the homogenized substrates resulted in coproduction of C6/C5 sugars and organic acids in the hydrolysates. Maximum 81% glucose and 100% xylose yields were achieved in the paper-rich MSW-derived hydrolysate (PDH). A glucose yield of 96.7% was obtained in the food-rich MSW-derived hydrolysate (FDH). Sugars in PDH and FDH were readily fermentable without detoxification and solid separation. Preliminary fermentation attained 17.7 g/L ethanol from the PDH (69.4% theoretical yield) and 8.9 g/L ethanol from FDH (70.3% theoretical yield), respectively, both comparable with the Avicel-derived hydrolysate (67.6% theoretical yield) used as the control.

更新日期：2020-11-16

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