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    30 September 2014, Volume 48 Issue 5 Previous Issue    Next Issue
    Advanced Oxidation of the Biochemical Effluent of Bamboo Pulping Wastewater Based on Sodium Persulfate Activated by Heat
    LI Si-hui, SHI Ying-qiao, DING Lai-bao, CUI Hong-hui, PAN Ai-xiang, FANG Gui-gan
    2014, 48 (5):  1-6.  doi: 10.3969/j.issn.1673-5854.2014.05.001
    Abstract ( 850 )   PDF (2293KB) ( 727 )   Save
    Activated sodium persulfate used as the AOTs to degrade the biochemical effluent of bamboo wastewater in chemical machanical pulp craft was investigated.The results indicated that when the dosage was 1.5 kg/t at 50℃,COD reached the lowest,65 mg/L,and the removal efficiency was 54.86%.Thus the effluent met the national emission standard,80 mg/L.The pH value could not only perform the lignin-precipitation-effect in strong acidity,but also affect the species of free radical in powerful alkaline in the heat activated persulfate system.The oxidation of pollutants could finish in 20 min because the free radicals had strong reactivity and short life.No change had occurred on the COD nearly with the reaction time prolonging.
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    Study on the Fermentation of Cellulase Solid Koji by Using Trichoderma reesei
    ZHANG Ning, JIANG Jian-chun, YANG Jing, WEI Min, ZHAO Jian, TONG Ya-juan
    2014, 48 (5):  7-10.  doi: 10.3969/j.issn.1673-5854.2014.05.002
    Abstract ( 728 )   PDF (1582KB) ( 651 )   Save
    The cellulase solid koji was fermented by using high yielding strain Trichoderma reesei 150-1-1 screened in our laboratory. Solid koji and crude enzyme with high cellulase activities were obtained by optimizing the medium components and fermentation conditions of solid fermentation. The results showed that the cellulase activities of solid koji reached 423.6 U/g under the optimal conditions where the fermentation material was 10 g, the ratio of straw powder to wheat bran was 4:1, the ratio of materials to water was 1:2.5, the fermentation reaction temperature was 31℃, the reaction time was 120 h, and the original pH was 5.5.
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    Determination of Safrole Content in the Essential Oil of Cinnamomum petrophilum N. Chao Leaves by Capillary Column Gas Chromatography with Internal Standard Method
    YIN Li-guo, XU Zhou, ZHANG Chao, WEI Qin
    2014, 48 (5):  11-14.  doi: 10.3969/j.issn.1673-5854.2014.05.003
    Abstract ( 873 )   PDF (1478KB) ( 705 )   Save
    In order to determine safrole content in the essential oil of Cinnamomum petrophilum N. Chao leaves rapidly,the capillary column gas chromatography with internal standard method was set up.The safrole contents of the essential oils were 92.9% to 94.3%.The relative standard deviation (RSD) of the detection method was less than 0.5%,and the detection time was 8 min.The method was rapid,accurate and precise.
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    Comparative Analysis of Patchouli Essential Oils with Singlecropping and Intercropping with Rubber Tree
    PANG Yu-xin, ZHANG Ying-bo, WU Min, YUAN Yuan, YU Fu-lai, CHEN Xiao-lu, HU Xuan
    2014, 48 (5):  15-18.  doi: 10.3969/j.issn.1673-5854.2014.05.004
    Abstract ( 846 )   PDF (1479KB) ( 692 )   Save
    In order to study the quantity and quality difference of patchouli essential oils with singlecropping and intercropping with Hevea brasiliensis,the patchouli essential oils were extracted by steam distillation.Then the chemical composition was analyzed by GC-MS.The yields of patchouli essential oils from singlecropping and intercropping with Hevea brasiliensis were 1.77% and 2.09%.The chemical composition of patchouli essential oils with different cropping mode had little difference,and main compounds were δ-guaiene,patchouli alcohol,α-guajene,β-patchoulene,α-patchoulen,etc.The difference of patchouli essential oils with different cropping mode were the amount of same chemical composition,such as boldenon,patchouli alcohol,δ-guaiene,β-patchoulene and α-guajene,and the variance ratios of contents ranged from 1.18% to 4.60%.2-3 year-age of Hevea brasiliensis grove was a suitable cultivation environment for Pogostemon cablin planting,and the patchouli essential oil from intercropping with Hevea brasiliensis had little difference with patchouli essential oil from singlecropping.Intercropping with Hevea brasiliensis was a good method for Pogostemon cablin planting,the farmer could got economic benefit and ecological benefit.
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    Optimization of Ultrasonic-assisted Extraction of Polyphenol from Litsea Coreana using Response Surface Methodology
    ZHANG Yu-si, WANG Cheng-zhang, SHU A-qing, YE Jian-zhong
    2014, 48 (5):  19-23.  doi: 10.3969/j.issn.1673-5854.2014.05.005
    Abstract ( 658 )   PDF (2001KB) ( 658 )   Save
    Based on single factor test,a 3-factor,3-level Box-Behnken experimental was adopted,including dependent variables (extraction time,liquid-solid ratio and ultrasonic wave power) and independent variable (polyphenol yield).The optimum conditions of ultrasonic-assisted extraction technology for polyphenol from Litsea coreana were determined by using response surface method.The results showed that the regression model fitted well with experimental data.The optimum conditions were 5 g samples,extraction time 22 min,liquid-solid ratio 21:1,ultrasonic wave power 300 W.Under these conditions,the polyphenol yield was 3.76%.
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    Overview of the Modification of Mesoporous Carbon Materials and the Application in the Hydrogenation of Bio-oil
    XU Ying, LI Yan-bin, ZHANG Li-min, ZHANG Qi, WANG Tie-jun
    2014, 48 (5):  24-32.  doi: 10.3969/j.issn.1673-5854.2014.05.006
    Abstract ( 777 )   PDF (4486KB) ( 837 )   Save
    The bio-oil,as low-cost and renewable fuel energy,is considered as a kind of important alternative fuel and has aroused many researchers interests in domestic and aboard.Hydrogenation is one of the promising methods on upgrading bio-oil,wherein the investigation on the catalysts especially the carrier is the key.This article reviewed the preparation of mesoporous carbons and the modification of mesoporous carbons was discussed emphatically.It also introduced different methods on modifying mesoporous carbons.The hydrogenation properties of catalysts using mesoporous carbons as carriers were analyzed.Finally,the potential application and development on the bio-oil upgrading through using mesoporous carbons were proposed.
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    A Review of the Formation Mechanism and Emission Characteristics of Particles in the Biomass Combustion Process
    CHEN Zhen-hui, YANG Hai-ping, YANG Wei, WANG Xian-hua, SHAO Jing-ai, CHEN Han-ping
    2014, 48 (5):  33-38.  doi: 10.3969/j.issn.1673-5854.2014.05.007
    Abstract ( 882 )   PDF (2571KB) ( 819 )   Save
    In this paper,the formation mechanisms of particles during biomass combustion are reviewed.And the emissions of particles in the traditional biomass combustion equipment features are emphatically discussed.However,some shortages still exist in the previous research,thus a few of proposals are put forward for the further research.
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    Research Progress of Livestock Protein Feedstuff Preparation by Solid State Fermentation
    XIE Pu-jun, HUANG Li-xin, ZHANG Cai-hong, YOU Feng, ZHANG Yao-lei
    2014, 48 (5):  39-46.  doi: 10.3969/j.issn.1673-5854.2014.05.008
    Abstract ( 573 )   PDF (2445KB) ( 789 )   Save
    Research progress of solid state fermentation (SSF) to produce protein forage at home and abroad was reviewed.The advantages and disadvantages of SSF,and the influenting factors of SSF including kinds of substrate,strain selection,technical parameters were expounded in detail.Furthermore,the problem and key technology in the process of SSF were discussed to provide a reference for the further process of the farming and forestry residues.
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    Research Progress on Thermal Stability of Nanocrystalline Cellulose
    WANG Qian-qian, ZHU Qian-qian, SUN Jian-zhong, XU Jia-xing
    2014, 48 (5):  47-51.  doi: 10.3969/j.issn.1673-5854.2014.05.009
    Abstract ( 1121 )   PDF (3001KB) ( 765 )   Save
    Nanocrystalline cellulose (NCC) isolated from biomass has attracted great attention as a novel nanostructure material due to its low cost,excellent mechanical properties,biodegradability and renewability.However,there are still many challenges that need to be overcome in the application of nanocrystalline cellulose,including large-scale production of nanocrystalline cellulose and improvement of its thermal stability.This paper reviewed the mechanism of nanocrystalline cellulose thermal degradation and summarized the factors which affected its thermal stability.The progress of the methods in improving thermal stability was discussed.
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    Research Progress on Volaile Organic Solvent Recovery by Carbon
    YANG hua, LIU Shi-Cai
    2014, 48 (5):  52-58.  doi: 10.3969/j.issn.1673-5854.2014.05.010
    Abstract ( 910 )   PDF (2296KB) ( 761 )   Save
    Recently with the high development of national economy in China,all kinds of organic solvents were widely used in industrial production,and the emission of organic exhaust also increased year by year. This not only cause environmental pollution but also bring the waste of resources.Organic vapor recovery had three benefits on environment,health and economy.The harmfulness,recycling significance and common recovery methods of organic solvents were introduced and solvents recovery via activated carbon was mainly presented.Taking the most common gasoline,acetone and butanone recovery as examples,the research progress on activated carbon used in solvents recovery was presented.
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