期刊文献+
共找到8篇文章
< 1 >
每页显示 20 50 100
Converting textile waste into value-added chemicals:An integrated bio-refinery process 被引量:1
1
作者 Eun Jin Cho Yoon Gyo Lee +3 位作者 Younho Song Ha Yeon Kim Dinh-Truong Nguyen Hyeun-Jong Bae 《Environmental Science and Ecotechnology》 SCIE 2023年第3期66-76,共11页
The rate of textile waste generation worldwide has increased dramatically due to a rise in clothing consumption and production.Here,conversion of cotton-based,colored cotton-based,and blended cotton-polyethylene terep... The rate of textile waste generation worldwide has increased dramatically due to a rise in clothing consumption and production.Here,conversion of cotton-based,colored cotton-based,and blended cotton-polyethylene terephthalate(PET)textile waste materials into value-added chemicals(bioethanol,sorbitol,lactic acid,terephthalic acid(TPA),and ethylene glycol(EG))via enzymatic hydrolysis and fermentation was investigated.In order to enhance the efficiency of enzymatic saccharification,effective pretreatment methods for each type of textile waste were developed,respectively.A high glucose yield of 99.1%was obtained from white cotton-based textile waste after NaOH pretreatment.Furthermore,the digestibility of the cellulose in colored cotton-based textile wastes was increased 1.38e1.75 times because of the removal of dye materials by HPAC-NaOH pretreatment.The blended cottonPET samples showed good hydrolysis efficiency following PET removal via NaOHeethanol pretreatment,with a glucose yield of 92.49%.The sugar content produced via enzymatic hydrolysis was then converted into key platform chemicals(bioethanol,sorbitol,and lactic acid)via fermentation or hydrogenation.The maximum ethanol yield was achieved with the white T-shirt sample(537 mL/kg substrate),which was 3.2,2.1,and 2.6 times higher than those obtained with rice straw,pine wood,and oak wood,respectively.Glucose was selectively converted into sorbitol and LA at a yield of 70%and 83.67%,respectively.TPA and EG were produced from blended cottonPET via NaOHeethanol pretreatment.The integrated biorefinery process proposed here demonstrates significant potential for valorization of textile waste. 展开更多
关键词 Textile waste Value-added biochemicals integrated biorefinery BIOETHANOL Lactic acid
原文传递
Wet oxidation of activated carbon for enhanced adsorptive removal of lignin from the prehydrolysis liquor of kraft-based dissolving pulp production in an integrated forest biorefinery
2
作者 Baobin Wang Guihua Yang +4 位作者 Qiang Wang Lucian ALucia Tingpeng Jia Jiachuan Chen Guigan Fang 《Journal of Bioresources and Bioproducts》 EI 2017年第2期73-81,共9页
Prehydrolysis is a key step for the production of kraft-based dissolving pulp.The pre-hydrolysis liquor mainly contains hemicellulosic components.Lignin can also be released into the pre-hydrolysis liquor,which hinder... Prehydrolysis is a key step for the production of kraft-based dissolving pulp.The pre-hydrolysis liquor mainly contains hemicellulosic components.Lignin can also be released into the pre-hydrolysis liquor,which hinders the purification and utilization of these hemicellulosic components.In this work,wet oxidation of activated carbon with nitric acid was employed to enhance the adsorptive removal of lignin from the pre-hydrolysis liquor.Under mild oxidation conditions(2%nitric acid solution),the oxidization of activated carbon resulted in significant enhancement of lignin removal.Adsorption isotherms showed that the specific surface area and the amount of carboxyl groups were affected by the oxidation treatment.The selective removal of lignin fitted well with the pseudo-second order kinetics model. 展开更多
关键词 PREHYDROLYSIS Activated carbon LIGNIN Kraft-based dissolving pulp integrated forest biorefinery
原文传递
生物炼制与石油炼制一体化——促进我国生物质能源发展的有效对策之一 被引量:5
3
作者 覃伟中 李强 +1 位作者 朱兵 陈丙珍 《化工学报》 EI CAS CSCD 北大核心 2010年第7期1653-1658,共6页
生物炼制是与石油炼制互补的新型工业生产模式,对我国生物质能源发展有重要作用。我国生物炼制产业发展目前处于起步阶段,面临着原料、技术等问题。针对我国国情,提出了在条件适当地区,生物炼制企业建设采取生物炼制与石油炼制一体化建... 生物炼制是与石油炼制互补的新型工业生产模式,对我国生物质能源发展有重要作用。我国生物炼制产业发展目前处于起步阶段,面临着原料、技术等问题。针对我国国情,提出了在条件适当地区,生物炼制企业建设采取生物炼制与石油炼制一体化建设的设想。以燃料乙醇项目建设为例,通过对单独建设和一体化建设两种方案的比较,从成本、未来发展和原料供应等方面分析了一体化建设的优势。研究表明生物炼制与石油炼制一体化模式将对我国能源、化工等行业的可持续性发展起到促进作用。 展开更多
关键词 生物炼制 石油炼制 一体化
下载PDF
制浆造纸工业的可持续发展与构建集成的林产生物质精炼工业 被引量:4
4
作者 高扬 倪永浩 +1 位作者 张凤山 秦梦华 《林产化学与工业》 EI CAS CSCD 北大核心 2010年第2期113-120,共8页
目前在综合的林产资源生物质精炼领域正在进行着深入的研究,其中将化学法制浆过程与高效利用木质纤维资源的生物质精炼结合起来,可望给相关传统工业带来变革。作者概述了构建综合的林产生物质精炼工业概念的提出和研究的开展,重点介绍... 目前在综合的林产资源生物质精炼领域正在进行着深入的研究,其中将化学法制浆过程与高效利用木质纤维资源的生物质精炼结合起来,可望给相关传统工业带来变革。作者概述了构建综合的林产生物质精炼工业概念的提出和研究的开展,重点介绍了将硫酸盐法制浆厂转变成为新型的一体化纤维资源生物质精炼工业的设想。并提出重视这一领域的深入研究和技术开发,可以提高相关产业的竞争能力,对于实现传统工业的发展和变革,以及利用可再生植物资源生产新能源有着重要的意义。 展开更多
关键词 生物质精练 化学法制浆 半纤维素 木质素 生物质能源 再生化学品
下载PDF
纤维素乙醇工业化的必由之路——组合生物精炼 被引量:9
5
作者 曲音波 赵建 刘国栋 《生物产业技术》 2018年第4期20-24,共5页
虽然历经无数科技人员数十年的艰苦研发,秸秆类木质纤维素资源转化燃料乙醇的生产技术至今未能真正实现大规模的工业化。究其原因,除在一些关键核心技术方面仍需要取得突破外,还需要实现跨学科、跨领域的集成创新,通过集成构建原料收储... 虽然历经无数科技人员数十年的艰苦研发,秸秆类木质纤维素资源转化燃料乙醇的生产技术至今未能真正实现大规模的工业化。究其原因,除在一些关键核心技术方面仍需要取得突破外,还需要实现跨学科、跨领域的集成创新,通过集成构建原料收储运系统、绿色预处理无害化分离原料组分、就地高效生产专用高性能酶系、高值化利用生物质各组分、整合一代二代乙醇工艺和设施等,开发出无缝连接的组合型生物质精炼成套工艺、成熟装备和整体工业化方案,加上国家对新兴绿色循环经济产业的稳定扶植,才能使纤维素乙醇工业真正具有经济上的竞争力,并逐步发展成产品多样的可再生生物质资源集成精炼的大型产业。 展开更多
关键词 木质纤维素 燃料乙醇 生物基化学品 生物精炼 组合集成技术
下载PDF
纤维素乙醇产业化的突破口--集成就地产酶工艺的多联产生物精炼 被引量:7
6
作者 曲音波 毕衍金 +5 位作者 李雪芝 赵淑晶 韩小龙 闫俊卿 杜健 李宏伟 《生物产业技术》 2017年第3期36-40,共5页
纤维素乙醇产业化在可再生资源利用、环境污染控制、农业产业链延伸、农村经济发展、农民就业等方面均可发挥重大作用。但由于生产成本仍然偏高,至今未能实现大规模的产业化。把集成了就地产酶过程的多联产生物精炼技术选择为实现纤维... 纤维素乙醇产业化在可再生资源利用、环境污染控制、农业产业链延伸、农村经济发展、农民就业等方面均可发挥重大作用。但由于生产成本仍然偏高,至今未能实现大规模的产业化。把集成了就地产酶过程的多联产生物精炼技术选择为实现纤维素乙醇大规模产业化的突破口,可以大幅度降低酶解产糖的用酶成本。同时,引进精炼概念,提高了纤维素乙醇生产与同类粮食和石油产品的经济竞争力。玉米芯生物精炼联产木糖产品-乙醇-木质素工艺技术,成功实现了纤维素乙醇工业化生产,最近正在合作开发秸秆生物精炼联产纸浆-乙醇-黄腐酸肥新技术,有望实现更大规模的工业生产。 展开更多
关键词 纤维素乙醇 集成生物精炼 就地产酶 纤维素酶 戊糖/己糖共发酵
下载PDF
Implementation of a Forest Biomass-Based Biofuel Industry: A Canadian Experience
7
作者 Mariya Marinova Michel Perrier Jean Paris 《Journal of Energy and Power Engineering》 2014年第10期1680-1686,共7页
The forest biomass is an abundant renewable resource from which biofuels can be derived. In the Kraft process, the cellulose is extracted from the wood to form the paper pulp while the other organic components, primar... The forest biomass is an abundant renewable resource from which biofuels can be derived. In the Kraft process, the cellulose is extracted from the wood to form the paper pulp while the other organic components, primarily hemicelluloses and lignin, are burnt to produce steam. It is possible to divert part of the hemicelluloses or lignin to produce fuels on site, a mode of operation referred to as the integrated forest biorefinery. Hemicelluloses can be hydrolysed into sugars which in turn are converted into ethanol or butanol, while lignin can be extracted from a residual process stream, the black liquor, by acid precipitation, de-ionized, dried and directly used as a fuel or further processed into value added chemicals. Biorefinery processes have been proposed and analysed by simulation on Aspen Plus. Intensive integration of thermal energy, water and material systems is of paramount importance to the sustainability of the global site; the increased energy load on the utility systems could cause rising dependency of the global site on fossil fuels. To avoid this consequence, a new original energy efficiency analysis and enhancement methodology has been developed and validated on actual Canadian Kraft mills before being applied to the integrated biorefinery and, has produced remarkable results far superior to the current engineering practice. This has led to the concept of the GIFBR (green integrated forest biorefinery), i.e., an industrial site with zero fossil fuel consumption and reduced GHG (greenhouse gases) emissions vs. the Kraft process and biorefinery plant alone. The GIFBR incorporates a woody biomass gasifier producing syngas as a fuel for the integrated biorefinery and for steam production or sale. It can also include a CHP (combined heat and power) unit driven by steam made available by liberated production capacity from the installed power plant. 展开更多
关键词 Wood biomass renewable energy integrated forest biorefinery biofuels Kraft lignin extraction BIOETHANOL greenbiorefinery energy efficiency enhancement.
下载PDF
Resistance mechanisms and reprogramming of microorganisms for efficient biorefinery under multiple environmental stresses 被引量:5
8
作者 Ke Xu Yun Seo Lee +1 位作者 Jun Li Chun Li 《Synthetic and Systems Biotechnology》 SCIE 2019年第2期92-98,共7页
In the fermentation process of biorefinery,industrial strains are normally subjected to adverse environmental stresses,which leads to their slow growth,yield decline,a substantial increase in energy consumption,and ot... In the fermentation process of biorefinery,industrial strains are normally subjected to adverse environmental stresses,which leads to their slow growth,yield decline,a substantial increase in energy consumption,and other negative consequences,which ultimately seriously hamper the development of biorefinery.How to minimize the impact of stress on microorganisms is of great significance.This review not only reveals the damaging effects of different environmental stresses on microbial strains but also introduces commonly used strategies to improve microbial tolerance,including adaptive evolution,reprogramming of the industrial host based on genetic circuits,global transcription machinery engineering(gTME)and bioprocess integration.Furthermore,by integrating the advantages of these strategies and reducing the cost of system operation,the tolerance of industrial strains,combined with production efficiency and process stability,will be greatly improved,and the development prospects of biorefinery will be more widespread. 展开更多
关键词 biorefinery Environmental stresses Microbial resistance mechanism Synthetic biology Bioprocess integration
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部