Liaoning Institute of Energy Resources

Yingkou, China

Liaoning Institute of Energy Resources

Yingkou, China
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Lei F.,Shenyang Aerospace University | Yuan G.,Shenyang Aerospace University | Wei K.,Liaoning Institute of Energy Resources | Rundong L.,Shenyang Aerospace University | And 3 more authors.
Journal of Residuals Science and Technology | Year: 2016

The effect of initial total solid (TS) concentrations on the volume percent of methane and TAN contents from the anaerobic digestion of kitchen waste was studied in this paper by setting the initial TS as 4 wt%, 5 wt%, 6 wt%, 7 wt%. The inflection points of the cumulative biogas productions curve of different initial TS concentration took place at day 8,19 day, 17 day, 15 day, 9,20 day, respectively. The concentrations of methane generally rose firstly and then declined except that two different peaks (71.54% and 64.31%) of the methane volume percent were observed in day 15 and day 25 respectively under the condition of initial TS mass fraction of 4 wt%. The maximum methane volume percent under the condition of initial TS mass fraction of 5 wt%, 6 wt%, and 7 wt% was 76.7%, 73.93%, and 74.32% respectively in day 20. The TAN contents increased with the reaction time under the influence of varied initial TS contents. When the initial TS content was 4 wt%, 5 wt%, 6 wt%, and 7 wt%, the accumulated total ammonia nitrogen (TAN) content in day 30 was 1830, 2659, 2647, and 3040 mg/L respectively. © 2016 DEStech Publications, Inc.


Ye R.,Shenyang Aerospace University | Ye R.,Liaoning Institute of Energy Resources | Liu J.,Liaoning Institute of Energy Resources | Li X.,Liaoning Institute of Energy Resources | And 4 more authors.
Taiyangneng Xuebao/Acta Energiae Solaris Sinica | Year: 2016

Considering synthesis gas preparation as the target, the experiment on the gasification of sawdust with steamoxygen enriched air is carried out in a bubbling fluidized bed with the directional target of improving the H/C. The effect of air equivalence ratio (ER), steam to biomass ratio (S/B) and oxygen concentration (OC) on the gas compositions and H2/CO(H/C) were investigated. Results showed that under the condition of same OC and S/B, the higher the ER within a certain range, the wider the experiment of S/B affordable range is, the higherthe target parameter H/C are; The H/C is mainly affected by S/B and OC; In theself-heating bubbling bed with steam-oxygen enriched air gasification process, the optimum process conditions for synthesis gas is: OC in the range of 60%-70%, ER in the range of 0.33-0.38, S/B is about 0.56, thecorresponding optimum H/C is 1.13. © 2016, Editorial Board of Acta Energiae Solaris Sinica. All right reserved.


Yu M.,Liaoning Institute of Energy Resources | Gu S.,ShenYang Agricultural University | Yu Y.,Yingkou Environmental Assessment Ltd. | Dong Y.,The Geological Society of Liaoning Province | And 3 more authors.
Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering | Year: 2016

The wet anaerobic fermentation technology generates a large amount of biogas slurry. Biogas slurry treatment is the bottleneck of anaerobic fermentation technology development. In addition, according to past experience and theoretical calculation, maintaining an adequate liquid anaerobic fermentation temperature consumes about 30% of the system capacity. In winter, it even reaches 45% in the northern cold regions. This limits the anaerobic fermentation technology development greatly in northern cold region. The dry anaerobic fermentation technology, on the other hand, does not produce biogas slurry, and its residue is easy to be processed into the organic fertilizer. The level of the moisture content of China municipal waste is especially suitable for dry anaerobic digestion. However, the dry fermentation technology is relatively new, and the system control is more difficult than liquid fermentation. From that perspective, research on development of anaerobic dry fermentation devices is the key for the success of the technology. The features of designed vertical continuous dry fermentation equipment include stir heat up adjustment tank, multipoint distribution feed, vertical anaerobic fermentation tank and slurry reflux mixing process. Altogether, the fermentation system can process high volume of solid organic waste and produce biogas. The vertical continuous dry fermentation equipment mainly included the stir heat up regulating tank, feed pump, vertical anaerobic fermentation tank and discharge pump. A reflux inlet and fresh organic waste material inlet at the top of stir heat up regulating tank were set up, the bottom of stir heat up regulating tank was connected to the vertical anaerobic fermentation tank through the feed pump. An air outlet at the top of fermentation tank was set up which was connected to the gas pipeline. The discharge port on the bottom, the biogas slurry and residue that outflowed from discharge port was divided into two paths by discharging pump and first adjust the control valve. One path was connected to reflux inlet of stir heat up regulating tank, the other was the residue export connected to the discharge piping. We expected that such design could realize a quick start for biogas generation without stirring and heating in anaerobic reactor, and without adding water consumption during the process. We also expected that such device could save energy, reduce the volume of biogas slurry residue, protect the environment, and reduce the cost. The top of the vertical anaerobic fermentation tank using multipoint feeding distribution way facilitated more uniform distribution of fermentation raw materials. The internal temperature in the fermentation tank without stirring and heating device was maintained by continuous in and out of the hot materials. We used the reactor to conduct fermentation experiment to study the effect of slurry reflux and gas characteristics by comparing with a control group. The VFA (volatile fatty acid) content of application reflux was reduced, and the VFA content was minimum by reflux ratio of 1:7. When C/N ratio was close to 25:1, there was no ammonia nitrogen accumulation and gas production was the best. The high reflux ratio of 1:8-1:9 appeared to have a certain extent accumulation of VFA content. The flux ratio at 1:9 was the highest for generating biogas slurry quantity, and the VFA accumulation phenomenon was the most obvious, which reached 7822.4 mg/L. At the same time, high ammonia concentration inhibited biogas production. In conclusion, with a high clinker backflow, the anaerobic fermentation system would be suppressed. The slurry reflux had no significant influence in methane content. © 2016, Chinese Society of Agricultural Engineering. All right reserved.


Yu H.,Shenyang University of Technology | Chen S.,Shenyang University of Technology | Jiang Y.,Liaoning Institute of Energy Resources | Jin S.,Shenyang University of Technology | Bai Q.,Shenyang University of Technology
Materials Research Innovations | Year: 2014

Based on the thermal damage experiment in a laboratory, the damage variation versus temperature is analysed. A thermal damage model is established, which can be used to calculate damage field and stress field of concrete dam with damage character considered. The damage counter lines for 50 years during the operation period are given. The results show that the maximum of damage and the maximum of thermal stress were at the same place, where was the dam downstream surface. So, the dam downstream surface may crack easily. © 2014 W. S. Maney & Son Ltd.


Li X.,Liaoning Institute of Energy Resources | Liu J.,Liaoning Institute of Energy Resources | Zheng L.,Liaoning Institute of Energy Resources | Li M.,Liaoning Institute of Energy Resources | And 4 more authors.
Taiyangneng Xuebao/Acta Energiae Solaris Sinica | Year: 2015

The pilot scale experiment of oxygen-rich sawdust gasification in a bubbling fluidized bed was carried out. The influence of the different aperture ratio of air distribution plate, particle size of bed material, height of bed material, minimum fluidization velocity and gasification medium on gasification result was studied. The results show that the wind distribution effect of the air distribution plate with aperture of Φ 2 mm and 0.5% aperture ratio is better; the fluidization effect with particle size of bed material of 0.18-0.25 mm quartz sand and height of bed material of 140 mm is more ideal; the minimum fluidization velocity is influenced by the bed material size and heating rate. The preliminary test measurement shows that the calorific value is 9.6 MJ/m3 when oxygen concentration is 50%. ©, 2015, Taiyangneng Xuebao/Acta Energiae Solaris Sinica. All right reserved.


Liu J.,Liaoning Institute of Energy Resources | Wang G.,Liaoning Institute of Energy Resources | Li X.,Liaoning Institute of Energy Resources | Meng F.,ShenYang Agricultural University | Zhang D.,Liaoning Institute of Energy Resources
Taiyangneng Xuebao/Acta Energiae Solaris Sinica | Year: 2013

The pilot scale experiment on wood oxygen rich gasification in a down draft gasifier was carried out. The influence of the different gasified medium and oxygen concentration and temperature of gasification was studied. The reason of the gas heat value rise when the oxygen rich gasification was used and influence factors of CO2 gas from the gasification. The result showed that the gas heat value presented the trend of rise along with the increase of oxygen rich concentration at least double for the air gasification. The CO, H2 increased obviously, however the gasheat value do not rise as the oxygen rich concentration exceed 90%; The contents of CO2 was influence by oxygen concentration and ER; The effect of ER on gasification temperature and gas heat value; And conclude the proper temperature of gasification were 1100°C, in view of material characteristic and limit of equipment material.


Sun Y.,Liaoning Institute of Energy Resources | Liu Q.,Liaoning Institute of Energy Resources | Jiang Y.,Liaoning Institute of Energy Resources | Che Z.,Yingkou Institute of Environmental Science | And 4 more authors.
Chinese Journal of Environmental Engineering | Year: 2014

In order to study effects of alternative evolution in microorganism on gas production at starting stage of anaerobic fermentation, vegetable waste and restaurant garbage as raw materials respectively were analyzed. Trends of pH value, volatile fatty acid (VFA) and oxidation-reduction potential were also determined. The results show that the starting and gas production stage of restaurant garbage are longer than that of vegetable waste. The period of peak value of microorganism in vegetable waste is earlier than that of restaurant garbage. Organic in vegetable waste is more beneficial to degradation microorganism. The changes of microorganism community structure in two raw materials are uniform. Aerobic and facultative anaerobes are the dominant at early starting stage, the peak value of acidogenic bacteria is precede to the ammonification bacteria. Then the proliferation rate of anaerobic bacteria increases from less than 20% to almost 100% at the late starting stage. The anaerobic cellulose-decomposing bacteria grow slowly at starting stage. The content of n-butyric acid is over 4.7 mg/mL, account for over 46% of total VFA.


Yi K.,China Criminal Police College | Cao Y.,Liaoning Institute of Energy Resources | Li J.,China Criminal Police College | Xu Z.,China Criminal Police College | And 2 more authors.
Chemistry Bulletin / Huaxue Tongbao | Year: 2014

The determination of 5-Hydroxymethylfurfural (5-HMF) in soy has been carried out by derivative spectrophotometry. 5-HMF reacted with 2-thiobarbituric acid in strong acid medium, and then was determined at the wavelength of 414 nm. The analytical results indicated that the method is high accuracy, and good precision and sensitivity. The linear range was 0.5-4 μg/mL with correlation coefficient of 0.9995. The method can satisfy the requirement of quantitative determination in food security area.


Yu M.,Liaoning Institute of Energy Resources | Zhang D.,Liaoning Institute of Energy Resources | Li Y.,Liaoning Institute of Energy Resources | Dong X.,Liaoning Institute of Energy Resources | And 2 more authors.
Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering | Year: 2015

The organic waste mainly refers to the solid waste that is generated by residents' daily life. If the organic waste is converted into energy through anaerobic digestion, it will reduce the adverse impact on the environment and contribute to reduction in consumption of fossil fuel. Analysis of the space and time differences of various kinds of microbial community in fermentation process, plays a very important role for controlling the fermentation process effectively, understanding the fermentation stage, optimization of fermentation conditions and improving the efficiency of biogas production. This paper investigated the temporal and spatial distribution of microbial community during the semi-dry fermentation of organic waste, and studied the relationship of acid production, methane production and ammonia production using most probable number (MPN). The experiment used anaerobic fermentation under one-time charging medium temperature (37℃), and designed six sampling positions. The inoculum was biogas slurry fermented with pig manure, and the concentration was 30%, pH value was adjusted to 7.0 before anaerobic fermentation. The results showed that, in the early stage of organic waste anaerobic fermentation, large amounts of air existed in the reactor, and there was less number of anaerobic bacteria. With the formation of the anaerobic environment and rich nutrients, the number of anaerobic bacteria began to rise. The anaerobic acidification bacteria and anaerobic ammonification bacteria proliferated earliest, and the acidification bacteria was prior to reach maximum than ammonification bacteria and occupied the dominant position. The methane bacteria didn't proliferate at the start-up phase, they enter the fast growth stage after 15 days, and the peak value was 3. 24×109 mL-1 on the 25th day. In the gas peak decline period, the number of anaerobic ammonification bacteria and anaerobic acidification bacteria began to decline, however, the methane bacteria number kept on the order of magnitude in the whole period. The anaerobic cellulose-decomposing bacteria grew slowly, and the number was only 106 mL-1 on the 45th day. In the space, numbers of anaerobic acid bacteria and methane bacteria in the central part were more than those at the edge, and the numbers in the bottom were more than on the top; the most number of anaerobic ammoniation bacteria grew in middle edge and center position; at the same height, the numbers of edge position were more than the center position basically. The anaerobic cellulose-decomposing bacteria began to proliferate in the bottom. The number of the anaerobic bacteria on the top was lower than other places, due to the residual air on the top that was not conducive to the growth of anaerobic bacteria. In the reactor design, intermediate feed may be given priority to, edges feed was complementary, which was conducive to make full use of fermentation materials, and to improve the efficiency of the reactor. The dynamic model of anaerobic acidification bacteria and methanogens distribution differences was constructed preliminarily, and the correlation coefficients of fitting model were 0.824 and 0.939, respectively. The established model could predict effectively, and could provide the appropriate reference value of semi-dry anaerobic fermentation technology. The applicability of the model still requires further test to verify, therefore, the reactor enlarged gradually can be used for further study and parameters correction. This paper has theoretical significance for the technological processes of biogas production from organic waste. ©, 2015, Chinese Society of Agricultural Engineering. All right reserved.


Cao Y.,Liaoning Institute of Energy Resources | Shao L.,Liaoning Institute of Energy Resources | Zhang H.,Liaoning Institute of Energy Resources | Kou W.,Liaoning Institute of Energy Resources | And 2 more authors.
Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering | Year: 2014

Corn straw is one of the most abundant agricultural and forest residues containing cellulose, hemicellulose, and lignin. About 2.24×108 tons of corn straw are produced per year in china, most of which is burned or lost in farmland, and only a small part is used as feed for livestock. Because corn straw is abundant in cellulose, it can be used as a substitute for grain to produce fuel-ethanol, which can be a significant contribution for relieving the crisis of resource and foodstuff shortage. The process of producing fuel-ethanol includes pretreatment, enzymatic hydrolysis, fermentation, and distillation. Cellulose, hemicellulose, and lignin in corn straw form stable polymers, which hardly dissolve in water, dilute acid, dilute alkali, and most organic solutions. Each component interrelates with all the others. Because of the complex configuration, hemicellulose and lignin will hinder the degradation of cellulose. To utilize the cellulose, corn straw must be pretreated. To improve the reduction of sugar yield in corn straw, the hydrolysis method of using extremely low sulfuric acid followed by enzymolysis is employed to treat corn stalk. To investigate the mechanism of reducing sugar conversion in acid hydrolysis and enzymolysis, the yield of totally reduced sugar, glucose and xylose was analyzed with acid hydrolysis followed by enzymolysis under different acid concentrations, temperatures and reaction times. Acid concentrations 0.1%, 160°C, 55 min, 180 r/min, solid-liquid ratio 1:10 was confirmed by orthogonal experiment. Through acid hydrolysis followed by enzymolysis (enzyme 5.0%, pH 4.6, 24 h, 50°C), the yield of totally reduced sugar, glucose, and xylose was 56.22%, 16.97% and 18.83%, respectively. The concentration of totally reduced sugar, glucose, and xylose was 62.46, 18.85 and 20.92 g/L, respectively. After acid hydrolysis and enzymolysis treatment, the corn stalk component was analyzed by infrared spectral and the Van Soest methods. The conversion of cellulose and hemicellulose was 88.52% and 95.18%, respectively. The conversion of totally reduced sugar, glucose, and xylose was 88.11%, 44.86% and 72.49%, respectively. Extremely low acid pretreatment can hydrolyze hemicellulose into monosaccharides and degrade the crystalline structure of cellulose. The pretreated cellulose with high porosity can be hydrolyzed by cellulose efficiently. This method can avoid degradation of monosaccharides, improve reduced sugar yield and increase the conversion efficiency of corn straw cellulose.

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