Go to the main menu
Skip to content
Go to bottom
REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of Korea Technical Association of The Pulp and Paper Industry
Journal Basic Information
Journal DOI :
Korea Technical Association of the Pulp and Paper Industry
Editor in Chief :
Volume & Issues
Volume 42, Issue 5 - Dec 2010
Volume 42, Issue 4 - Dec 2010
Volume 42, Issue 3 - Sep 2010
Volume 42, Issue 2 - Jun 2010
Volume 42, Issue 1 - Mar 2010
Selecting the target year
Bioethanol Production Using Lignocellulosic Biomass - review Part I. Pretreatments of biomass for generating ethanol
Sheikh, Mominul Islam ; Kim, Chul-Hwan ; Yesmin, Shabina ; Lee, Ji-Yong ; Kim, Gyeong-Chul ; Ahn, Byeong-Il ; Kim, Sung-Ho ; Park, Hyeon-Jin ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 42, issue 5, 2010, Pages 1~14
Bio-ethanol is a promising alternative energy source for reducing both consumption of crude oil and environmental pollution from renewable resources like lignocellulosic biomass such as wood, forest residuals, agricultural leftovers and urban wastes. Based on current technologies, the cost of ethanol production from lignocellulosic materials is relatively high, and the main challenges are the low yield and high cost of the hydrolysis process. Development of more efficient pretreatment technology (physical, chemical, physico-chemical, and biological pretreatment), integration of several microbiological conversions into fewer reactors, and increasing ethanol production capacity may decrease specific investment for ethanol producing plants. The purpose of pretreatment of lignocellulosic material is to improve the accessible surface area of cellulose for hydrolytic enzymes and enhance the conversion of cellulose to glucose and finally high yield ethanol production which is economic and environmental friendly.
Bioethanol Production Using Lignocellulosic Biomass-review Part 2. Saccharification and fermentation of biomass for generating ethanol
Sheikh, Mominul Islam ; Kim, Chul-Hwan ; Yesmin, Shabina ; Lee, Ji-Yong ; Kim, Gyeong-Chul ; Ahn, Byeong-Il ; Kim, Sung-Ho ; Park, Hyeon-Jin ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 42, issue 5, 2010, Pages 15~23
Bio-ethanol is the most potential next generation automotive fuel for reducing both consumption of crude oil and environmental pollution from renewable resources such as wood, forest residuals, agricultural leftovers and urban wastes. Lignocellulosic based materials can be broken down into individual sugars. Therefore, saccharification is one of the important steps for producing sugars, such as 6-C glucose, galactose, mannose and 5-C xylose, mannose and rhamnose. These sugars can be further broken down and fermented into ethanol. The main objective of this research is to study the feasibility and optimize saccharification and fermentation process for the conversion of lignocellulosic biomass to low cost bioethanol.
Development of Amphoteric Polyacrylamide Retention System for ONP Recycled Pulp
Son, Dong-Jin ; Kim, Bong-Yong ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 42, issue 5, 2010, Pages 24~30
Papermaking technology has drastically improved over the last 20 years to face new challenges. Because environmental regulations have become increasingly strict, papermaking systems have had to accommodate elevated recycled pulp content and an increased use of recycled process water. Process water in papermaking systems has become more dirtier and reduced polymer efficiency. Amphoteric PAM demonstrated a higher degree of stability in a high conductivity environment compared to cationic PAM. This was illustrated by the improved retention performance, particularly the ash retention. This amphoteric polymer can be used for board or newsprint production using recycled pulp, especially for the systems where polymer dissolving water is high in conductivity and degradation of cationic functional groups of cationic PAM can occur.
Improvement of Strain and Elastic Modulus of Linerboard to Prevent Score Crack
Chin, Seong-Min ; Choi, Ik-Sun ; Lee, Hak-Lae ; Youn, Hye-Jung ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 42, issue 5, 2010, Pages 31~36
When corrugated board is folded at the severely low humidity condition, crack can occur along the scored (or creased) lines of linerboard. This phenomenon is called as score (or crease) crack. It is mainly resulted from the excessive concentration of stress on the outer layer of linerboard. To overcome score crack, many approaches including the installation of constant temperature and humidity system, displacement of low grade raw material by long and strong fibers, or application of water have been tried. We examined the effect of the weight fraction of top layer in two-ply sheet, freeness of top layer stock and wet pressing on strain and elastic modulus of sheet to prevent score crack. Lower freeness and higher press load increased the density and elastic modulus of sheet. Pressing load over the
, however, decreased the strain of sheet. The weight fraction of top layer had positive effect on strain as well as elastic modulus without increasing the density of sheet.
Study on the Change in Physical and Functional Properties of Paper by the Addition of Chitosan
Park, Seong-Cheol ; Kang, Jin-Ha ; Lim, Hyun-A ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 42, issue 5, 2010, Pages 37~46
This study was carried out to develop new application field and obtain the basic data of mixed paper with wood pulp and chitosan fiber for producing functional paper. Two types of wood pulp, such as SwBKP and HwBKP, were mixed with chitosan fiber. Physical and optical properties, water vapor absorption, air permeability, antibacterial activity and ash were measured. And the surface morphology of manufactured paper was observed using SEM. The results are as follows. It was revealed that density, breaking length, burst index, tear index, folding endurance and brightness were reduced but water vapor absorption and air permeability were on the rise in the structural view of SwBKP according to increasing the chitosan fiber ratio. Those HwBKP added chitosan fiber were great not only in the strength but also water vapor absorption and air permeability except for brightness. The water vapor absorption was lower and the air permeability was higher in the HwBKP added various chitosan fiber ratios than those with no chitosan fiber. It is estimated that these properties were related with various mixed rate of chitosan fiber. Particularly, air permeability was strongly dependent on the mixed rate of chitosan fiber. The chitosan fiber has superior antibacterial property, comparing with wood fiber. Adding chitosan fiber to the wood pulp was found to have an excellent antibacterial activity, more than 90%. The ashes were determined within 0.5%. Special bonds between chitosan fiber and wood pulp was observed by SEM and it means that the chitosan fiber were combined equally in the interior of wood pulp. In conclusion, mixing wood pulp with chitosan fiber can not only improves the quality of paper but also extend the usage of paper as a functional paper by using inherent property of chitosan. After all, production of functional paper added chitosan fiber is expected for new valuable industry of paper.
A Study on Applicability of Citrus Sludge for the Manufacture of Corrugated Medium
Lee, Tai-Ju ; Kim, Hyoung-Jin ; Lee, Chang-Yong ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 42, issue 5, 2010, Pages 47~53
It is important to utilize the citrus sludge in terms of the reuse of waste materials in the manufacture of corrugated medium. Especially, the mandarin industry occupies the first place in Jeju province. In this paper, the application of citrus sludge mixed with KOCC recycled fibers into the manufacture of corrugated medium was studied. The citrus sludge was acidic in pH value. Also, the constituents of citrus sludge contain some short fibers, fines, and mucus which contain flavonoids, pectins and so on. In papermaking application, these components cause some troubles like foams, bad smell, fouling on the paper machine, and bad drainage and web breaks of wet web. The strength properties of handsheets prepared from KOCC and citrus sludge was decreased, compare to handsheets made of only KOCC. To compensate the problems on strength properties, some kinds of additives were tried to apply into papermaking wet-end system in laboratory scale. As a result, mixing conditions of alum, starch and anionic additives showed the best options in the recovery of strength properties and formations of corrugated medium.
Antifungal Activities on Organic Heritage Fungi and Antioxidative effect of Phellodendron amurense Extractives
Hong, Jin-Young ; Kim, Young-Hee ; Jung, Mi-Hwa ; Jo, Chang-Wook ; Choi, Jung-Eun ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 42, issue 5, 2010, Pages 54~61
Antifungal and antioxidative activities of Phellodendron amurense extracts were investigated for use as a natural preservative. After separation of P. amurense into phloem, xylem, leaf and fruit each part was subjected to methanol extraction. Each MeOH extract was further fractionated with several solvents(n-hexane, methylene chloride and ethylacetate). Among the methanol extracts, extracts of phloem and leaf inhibited effectively the growth of mold fungi and rot fungi, respectively. Especially, ethylacetate fraction from phloem showed the highest growth inhibitory effects against fungi tested, such as P. citreonigrum H3, P. toxicarium H4, P. corylophilu H5, A. clavatus, P. osteatus, S. commune, and G. lucidum. The fractions of fruit, which had lower antifungal activities mostly than those of phloem, strongly inhibited rot fungi such as G. lucidum, T. versicolor, and T. palustris. Compared to ferulic acid which is well known antioxidant, ethylacetate fraction of fruit showed high antioxidative activities on concentration of 1 to
in DPPH radical scavenging activity. As a result, antifungal and antioxidative activities of P. amurense suggest that its extract and fraction have a possibility as conservative of cultural heritage because it might get conservation effects against deteriorating microorganisms of cultural heritage.
Comparison of cellulose DP measurements using the CED (Cupriethylene diamine) and NMMO(N-methylmorpholine-N-oxide)
Lee, Min-Woo ; Park, Ji-Soon ; Park, Dong-Hui ; Seo, Yung-Bum ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 42, issue 5, 2010, Pages 62~66
Cellulosic materials were dissolved by NMMO(N-methylmorpholine-N-oxide) and CED (Cupriethylene diamine), respectively, to measure their DPs (degrees of polymerization) by using viscometer. We changed cellulose DPs by applying various amounts of low intensity electron-beam radiation to the cellulosic materials. NMMO is environmental-friendly, non-toxic, and biodegradable organic cellulose solvent and used industrially because of its high cellulose dissolving power and high solvent recovery ratio. The cellulose DP measurement results using these two different chemicals were correlated highly (
>0.95). It was also found that cellulose with high DP was dissolved more easily in NMMO than CED. In addition, NMMO method gave more higher resolution in the measurement.
Study on the Pre-treatment for Quantitative Analysis of Mercury in Paper Packaging Materials
Ko, Seung-Tae ; Lee, Tai-Ju ; Park, Ji-Hyun ; Kim, Hyoung-Jin ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 42, issue 5, 2010, Pages 67~73
Paper packaging materials are essential in protection and transportation of commercial or industrial products. Raw materials for packaging paper production are mainly obtained from various grades of waste paper. For this reason, the recycled fibers from waste paper would probably have possibility of containing heavy metals. This study was focused on the development of optimum pre-treatment method for the quantitative analysis of mercury. The optimum pre-treatment for open digestion system were obtained at the treatment conditions of acid combination with
. The optimum pre-treatment conditions in closed digestion system were determinated by the acid combination with
in microwave at 320 W for 20 min. The recovery rate in open digestion system was 85~94% and in closed digestion system was indicated as about 100%. Therefore, the closed system is superior than the open system in pre-treatment method for the quantitative analysis of mercury, and the detected mercury contents in the sample of KOCC, AOCC and kraft sack paper were measured below 1 ppm.
Effects of PVA and CMC addition on Rheological Characteristics and Curtain Stability of GCC Based Curtain Coating Colors
Choi, Eun-Heui ; Kim, Chae-Hoon ; Lee, Hak-Lae ;
Journal of Korea Technical Association of The Pulp and Paper Industry, volume 42, issue 5, 2010, Pages 74~82
Curtain stability without curtain contraction is critical for a successful operation in curtain coating, and this can be influenced by the change in particle dynamics and rheological properties of coating colors. In this study, polyvinyl alcohol (PVA) and carboxymethyl cellulose (CMC) were added to control the rheology of GCC based curtain coating colors. Surface tension was increased slightly with increasing content of cobinder. Shear-thinning of viscosity was more pronounced for the CMC containing GCC coating colors. Complex modulus decreased when small amount of PVA was used as a cobinder, but it increased in other coating colors. Extensional viscosity was increased with increasing of the cobinder content, but CMC was more effective. Results indicate that pigment interaction with PVA is different from that with CMC. Dispersibility of coating colors was improved due to steric stabilization when small amounts of PVA was used, but flocculation occurred by bridging when the amount of PVA was increased. Dispersibility of coating colors was improved when small amount of CMC was added, while flocculation was observed by depletion effect when the concentration of CMC was increased in coating colors. Addition of cobinders at proper levels gave positive effects both in rheological properties and curtain stability. On the other hand, excessive amount of cobinders caused particle flocculation and this resulted in rheological and curtain stablity problems.