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오늘 본 자료
Mominul Islam Sheikh,Chul-Hawn Kim,Shabina Yeasmin,Hyun-Jin Park,Sung-Ho Kim,Jee-Young Lee 한국펄프·종이공학회 2010 한국펄프·종이공학회 학술발표논문집 Vol.2010 No.10
Increased acceptance of climate change iscreated by human activities and raising oil demand with insecure deliverance obliges the searching for alternative fuels. Therefore, in recent years biofuel has emerged as mostimportant alternative resource for liquid fuel and has generated a great deal of research interestin biofuel fermentation.This paper reports a preliminary study on the chemical pretreatment, microbial saccharification and fermentation of the agricultural leftovers like rice husk,rice straw and industrial wastes like paper money sludge.A combination of sodium hypochlorite (NaClO) and hydrogen peroxide (H₂O₂) were used for pretreatment, cellulase from Trichodermareesei ATCC 26921 and Novozymes 188 for saccharification, and Saccharomyces cerevisiae KCCM 11304 were used for carrying out fermentation in an aerobic condition.Rice husk, rice straw and paper money sludge resulted in biofuel yield 0.45 ㎎/g, 0. 52 ㎎/g &1.26 ㎎/g respectively. Firstly, the objective of this study is to produce biofuel from raw materials which will treat with various combinations of the microbial strains after screening, and secondly, to reduce dependency on foreign oiland to remove disposal problem of wastes andmake environment safe from pollution.
Bioconversion of rice straw to glucose for fuel-ethanol production
Mominul Islam Sheikh,Chul-Hwan Kim,Hyeon-Jin Park,Sung-Ho Kim,Gyeong-Chul Kim,Ji-Yong Lee,Sung-Woong Shim 한국펄프·종이공학회 2012 한국펄프·종이공학회 학술발표논문집 Vol.2012 No.4
Fuel-ethanol production from rice straw becomes increasingly important in light of the needs for alternative fuels, sustainable economy and environmental mitigation. Pretreatment with 2.0% diluted NaOH and 30 min reaction time showed the highest yield of glucose (63431.25 ppm). Among different conditions, highest fuel-ethanol (24895.21 ppm) was obtained subsequent treatment. Therefore, production of fuel-ethanol from rice straw would cut off management cost and make it profitable.
M. Mominul Islam Sheikh,Chul-Hwan Kim,Ji-Yong Lee,Shabina Yeasmin,Hyeon-Jin Park,Gyeong-Chul Kim,Sung-Ho Kim,Jae-Won Kim 한국펄프·종이공학회 2011 한국펄프·종이공학회 학술발표논문집 Vol.2011 No.4
Current fuel ethanol research and development deals with process engineering trends for improving biotechnological production of ethanol. Recently, a large amount of studies regarding the utilization of lignocellulosic biomass as a good feedstock for producing fuel ethanol is being carried out worldwide. The plant biomass is mainly composed of cellulose, hemicellulose and lignin. The main challenge in the conversion of biomass into ethanol is the complex, rigid and harsh structures which require efficient process and cost effective to break down. The isolation of microorganisms is one of the means for obtaining enzymes with properties suitable for industrial applications. For these reasons, crude cultures containingcellulosic biomass degrading microorganismswere isolated from rice field soil, cow farm soil and rotten rice straw from cow farm. Carboxymethyl cellulose (CMC), xylan and Avicel (microcrystalline cellulose) degradation zone of clearance on agar platefrom rice field soil resulted approximately at 25 ㎜, 24 ㎜ and 22 ㎜ respectively. As for cow farm soil, CMC, xylan and Avicel degradation clearancezone on agar plateresulted around at 24㎜, 23㎜ and 21 ㎜ respectively. Rotten rice straw from cow farm also resulted for CMC, xylan and Avicel degradation zone almost at 24 ㎜, 23 ㎜ and 22 ㎜ respectively. The objective of this study is to isolatebiomass degrading microbial strains having good efficiency in cellulose hydrolysisandobserved the effects of different substrates (CMC, xylan and Avicel) on the production of cellulase enzymes (endo-glucanase, exo-glucanase, cellobiase, xylanase and avicelase) for producing low cost biofuel from cellulosic materials.
M. Mominul Islam Sheikh,Chul-Hwan Kim,Hyun-Jin Park,Sung-Ho Kim,Gyeong-Chul Kim,Ji-Yong Lee,Jae-Won Kim 한국펄프·종이공학회 2011 한국펄프·종이공학회 학술발표논문집 Vol.2011 No.10
Renewable energy resources and technologies have the potential to provide long-lasting solutions of the global energy-requirements faced by the economic and environmental sectors of a nation. Therefore, waste money bills were used as renewable energy source for the production of bio-ethanol. In this study, different concentrated NaOH 0.5%. 1.0%, 2.0%, 3.0% and 0.0% (as a control) were used for 10, 20 and 30 mins at 121 ℃/15 psi in an autoclave. Saccharification and fermentation (aerobic and anaerobic) were carried out through commercial enzyme Celluclast 1.5 L, Novozymes 188 and Saccharomyces cerevisiae KCCM 11304 respectively. The results of pretreatment showed that the NaOH pre-treated substrate enhanced enzyme action and released more amount of glucose. The amount of glucose was found with the increasing concentration of NaOH and time 44996.95±6.30, 46763.10±3.56, 53421.32±4.72, 63431.25±6.95 and 56850.98±6.75 ng/μl for 30 min respectively. As for bioethanol, the conversion rate of NaOH resulted 1010.08±4.71, 1050.25±4.37, 1109.49±4.39, 1139.25±3.26 and 1020.77±3.89 ppm for aerobic; 16730.54±6.67, 17076.45±6.25, 17516.17±4.49, 19782.68±6.19 and 17973.39±7.50 ppm for anaerobic and 18935.02±4.59, 19895.45±5.39, 21912.95±4.83, 24895.21±6.72 and 18961.21±4.90 ppm for anaerobic condition with benzoic acid for respective condition. Thus, the results of the present work clearly revealed that with the increasing of alkali concentration might be more effective for bio-ethanol production from waste money bill, which is economic and environmental friendly.
산림바이오매스의 크라프트 펄프화를 위한 펄프 적성 연구
박현진,김철환,이지영,MD Mominul Islam Sheikh,김성호,김경철,심성웅,조후승 한국펄프·종이공학회 2011 한국펄프·종이공학회 학술발표논문집 Vol.2011 No.10
In recent, many forest residues have been generated by the National Forest Management Operation. Unfortunately, most of the forest residues are supposed to be used as raw materials for burning fuels like wood pellets. In this study, we investigated whether or not this forest biomass mixed in various ages and species could be used as raw materials for making kraft pulps in a view of optical properties.
김경철,김철환,이지영,MD mominul Islam sheikh,박현진,김성호,심성웅,조후승 한국펄프·종이공학회 2011 한국펄프·종이공학회 학술발표논문집 Vol.2011 No.10
This study investigated the prime difference between different methods for measuring a sizing degree. Based on the results coming from the study, a new type of the automatic measuring system of a sizing degree. The system includes synchronized devices for measuring contact angle and St?ckigt sizing degree at the same time.