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Joungdu Shin,Seung-Gill Hong,Won-Sil Choi,박선규 한국생물공학회 2013 Biotechnology and Bioprocess Engineering Vol.18 No.5
The liquefaction of rice hull (a typical agricultural waste) has been conducted with n-butanol solvent at various reaction temperatures ranging from 260 to 320oC. As a result, it was found that biomass conversion rates were increased with increasing temperature up to 320oC. However, it was observed that its rate of conversion to liquid was about 83% at 320oC for 30 min. The crude oil yield with rice hull increased up to 1,273 mg/g/L at 300oC,but the yield of Fraction 1 at 280oC was raised suddenly,and peaked at 2 times that of the initial input amount of feedstock. Furthermore, the calorific values of crude oil and Fraction 1 from rice hull were about 5,843 and 8,061kcal/kg and were enhanced 163 and 225%, respectively,relative to its feedstock as rice hull, respectively. Fraction 1may be suitable as an alternative liquid fuel of gasoline,based on an engine performance test. Sixty species of organic compounds in crude oil were categorized into 8classes of compounds, including acids, alcohols, aliphatic hydrocarbons, ethers, esters, ketones, phenol, and aromatics,and others. In the crude oil from rice hull, the most common chemical types were esters and ethers accounting for 32.0and 19.2% of the total extract, respectively. Analysis of Fraction 1 revealed that the main chemical components were C5H12O, C7H14O2, C8H16O2, and C12H26O2. Therefore,for producing clean and green fuel energy with plant biomass liquefaction it is necessary to further investigate crude oil and to further refine Fraction 1 through catalytic cracking or hydro-de-oxygenation (HDO).
Shin, Joungdu,Hong, Seung Gil,Kim, Sung-Chul,Yang, Jae Eui,Lee, SangRyong,Li, Fan-Zhu The Korean Society for Applied Biological Chemistr 2016 Applied Biological Chemistry (Appl Biol Chem) Vol.59 No.5
Biomass is a renewable energy resource derived from all organic materials produced by both human and natural activities. Total biomass is amounted to be $58,010Gg\;yr^{-1}$ from agricultural sector during 2013 in Korea: livestock manure, crop residues, and agro-industrial wastes. Potential methane production from agricultural biomass was calculated based on IPCC guidelines using manipulated equations. The main parameters were emission factor, total waste amount, and physico-chemical properties of each waste to estimate methane production. Calculated total potential methane production from the different categories for livestock, crop residues, and agro-industrial wastes was $502Gg\;yr^{-1}$ in Korea. Poultry waste generated the highest methane potential with $227Gg\;yr^{-1}$ followed by $80Gg\;yr^{-1}$ from cattle waste. For crop residues and agroindustrial wastes, estimated methane production was 1 and $126Gg\;yr^{-1}$, respectively. Results of this study show that livestock manure gave the highest methane emission in the agricultural sector. With this, more effective management of livestock wastes is necessary to develop and maximize technology on harnessing methane as alternative energy.
JoungDu Shin,DongKeon Lee,ChangKi Shim,JooHee Nam,ChangYoon Jeong 유기성자원학회 2022 유기성자원학회 학술발표대회논문집 Vol.2022 No.추계
This batch experiment was conducted to evaluate a major nutrient releasing impacts for different biochar application using a modified Hyperbola model through precipitation water for feasibility of organic fertilizer. The feeding stock for biochar was poultry manure compost, and then produced poultry manure biochar through pyrolysis system about 500℃. Furthermore, the poultry manure biochar was treated with Plasma for increasing its adsorption capacity. The input amount of sesame dregs was based on 320 kg ha-1 of nitrogen application, and the application amount of poultry manure compost was based on 2500 kg ha-1 for cabbage cultivation. The input amount of biochar was 20% of poultry manure compost application. The treatments consisted of control, poultry manure biochar and biochar treated with Prisma. The precipitation period was 120 days. The results were indicated that the soluble amounts of NH4-N was highest at 3673.5 mg L-1 in the control. The reduction rate in the addition of poultry manure biochar with plasma treated was 35.5%. The highest soluble amount of PO4-P was 1015.8 mg L-1 in the control. The reduction rates of PO4-P were 46.8% in the addition of poultry manure biochar with plasma treated compared to the control. Overall, the nutrient precipitation order was Control> Poultry manure compost biochar> addition of poultry manure biochar treated with Plasma. Therefore, it could be concluded that addition of the poultry manure biochar treated with biochar can be useful with controling the major nutrients for making the organic fertilizer.