|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | A comparative study on the alternating mesophilic and thermophilic two-stage anaerobic digestion of food waste显示文摘An alternating mesophilic and thermophilic two stage anaerobic digestion(AD) process was conducted. The temperature of the acidogenic(A) and methanogenic(M) reactors was controlled as follows: System 1(S1) mesophilic A-mesophilic M;(S2) mesophilic A-thermophilic M; and(S3)thermophilic A-mesophilic M. Initially, the AD reactor was acclimatized and inoculated with digester sludge. Food waste was added with the soluble chemical oxygen demand(SCOD) concentrations of41.4–47.0 g/L and volatile fatty acids of 2.0–3.2 g/L. Based on the results, the highest total chemical oxygen demand removal(86.6%) was recorded in S2 while S3 exhibited the highest SCOD removal(96.6%). Comparing S1 with S2, total solids removal increased by 0.5%; S3 on the other hand decreased by 0.1 % as compared to S1. However, volatile solids(VS) removal in S1, S2, and S3was 78.5%, 81.7%, and 79.2%, respectively. S2 also exhibited the highest CH4 content, yield, and production rate of 70.7%, 0.44 L CH4/g VSadded, and 1.23 L CH4/(L·day), respectively. Bacterial community structure revealed that the richness, diversity, evenness, and dominance of S2 were high except for the archaeal community. The terminal restriction fragments dendrogram also revealed that the microbial community of the acidogenic and methanogenic reactors in S2 was distinct. Therefore,S2 was the best among the systems for the operation of two-stage AD of food waste in terms of CH4production, nutrient removal, and microbial community structure. | Jey-R Sabado Ventura Jehoon Lee Deokjin Jahng | 2014 | Journal of Environmental Sciences2014，26，6： | 4 |
| 2 | Nitrogen control in AO process with re-circulation of solubilized excess sludge 显示文摘 | Rong Cui Deokjin Jahng | 2004 | Water Research2004，38，5： | 1 |
| 3 | Protein recovery from excess sludge for its use as animal feed显示文摘 | Jiyeon Hwang Lei Zhang Sunkeun Seo Yong-Woo Lee Deokjin Jahng | 2008 | Bioresource Technology2008，，18： | 1 |
| 4 | Nitrogen control in AO process with recirculation of solubilized excess sludge显示文摘 | Rong Cui Deokjin Jahng | 2003 | Water Research2003，，5： | 1 |
| 5 | Anaerobic co-dig- estion of food waste and piggery wastewater: Focusing on the role of trace elements显示文摘 | Zhang Lei Lee Yong-Woo Jahng Deokjin | 2011 | Bioresource Technology2011，102，： | 1 |
| 6 | Nitrogen control in AO process with recirculation of solubilized excess sludge显示文摘 | Rong C Deokjin J | 2004 | Water Research2004，38，5： | 1 |
| 7 | Nitrogen control in AO process with recirculation of solubilized excess sludge显示文摘 | Rong C Deokjin J | 2004 | Water Reseach2004，38，： | 1 |
| 8 | Anaerobic co-digestion of food waste and piggery wastewater:Focusing on the role of trace elements显示文摘 | Lei Zhang Yong-Woo Lee Deokjin Jahng | 2011 | Bioresource Technology2011，8，102： | 1 |
| 9 | Nitrogen control in AO process with recirculation of solubilized excess sludge显示文摘 | Rong Cui Deokjin Jahng | 2003 | Water Research2003，，5： | 1 |
| 10 | Enhanced Methane Production from Anaerobic Digestion of Disintegrated and Deproteinized Excess Sludge显示文摘 | Rong Cui Deokjin Jahng | 2006 | Biotechnology Letters2006，，8： | 1 |
| 11 | Long-term anaerobic digestion of food waste stabilized by trace elements Original Research Article显示文摘 | Lei Zhang Deokjin Jahng | 2012 | Waste Management2012，3，28： | 1 |
| 12 | Protein recovery from excess sludge for its use as animal feed显示文摘 | Jiyeon Hwang Lei Zhang Sunkeun Seo Yong-Woo Lee Deokjin Jahng | 2008 | Bioresource Technology2008，，18： | 1 |
| 13 | Nitrogen control in AO process with recirculation of solubilized excess sludge显示文摘 | Rong Cui Deokjin Jahng | 2004 | Water Reseach2004，38，： | 1 |
| 14 | Nitrogen control in Aoprocess with recirculation of solubilized excess sludge显示文摘 | Rong Cui Deokjin Jahng | 2004 | Water Research2004，38，： | 1 |
| 15 | Nitrogen control in AO process with recirculation of solubilized excess sludge显示文摘 | Rong C Deokjin J | 2004 | Water Reseach2004，38，5： | 1 |
| 16 | The Relationship Between Self-esteem and Preference Type of Play by Gender of Elementary School Students显示文摘The purpose of this study is to differentiate the gender into males and females based on prior research that children prefer different types of play depending on their gender,and to see what the relationship between their self-esteem and preferred types of play is.Random stratified method was used to collect study participants for this study.Elementary school students in Incheon Metropolitan City,Republic of Korea,were set up as a population,the city was divided into six areas in a similar area,and each school was numbered after identifying local elementary schools.A total of six schools were selected for each region by making random checks.A total of 18 classes were selected for each of the four,five,and six grades.A total of 450 questionnaires were distributed,but 381 of them were used for statistical analysis,except for 69 that were judged to have been poorly response.There were 215 male,166 female,151 in fourth grade,109 in fifth grade,and 121 in sixth grade.There are two questionnaires used in this study.First,to measure self-esteem,Rosengerg’s 10-item Self Esteem Scale was used to assess self-esteem.The scale,which provides a convenient measure of global attitudes about the self,has five negatively worded items and five positively worded items.This scale is one of the most widely used measures of self-esteem and has displayed good reliability and validity.Cronbach’s a showed 0.859.Second,to find out the preference for play types,we used those produced by Choi and Lee based on four types of play suggested by Roger Caillois.The questionnaire consists of four sub-variables:competition(Agon),chance(Alea),simulation(Mimicry)and vertigo(Ilinx).The Crombach’s a values are 0.705,0.694,0.786,and 0.722,respectively.The class teacher of the selected school was contacted and explained the purpose of the study and asked for consent.On the measurement date,we visited the class and conducted the measurement.Before measurement,we informed the purpose of the study again and asked for consent.The self-reported method was used to respond,and the measurement time was about 10 minutes.The responses were coded using the SPSS(win)15.0 program and frequency analysis was performed to characterize the data.The independent t-test was carried out to see if there was a difference between self-esteem and preferred types of play by gender.Correlation analysis was performed to see how self-esteem relates to the type of preferred play.All statistical significance levels are set as p<0.05.Children’s self-esteem does not differ depending on their gender.And it turned out that boys preferred competition,and girls preferred simulation,and chance and vertigo did not differ depending on gender.In male,a correlation between self-esteem and preference for play types has resulted in statistically significant correlation between self-esteem and competition,chance,and vertigo.In female,a correlation between self-esteem and preference for play types was performed in vertigo,where self-esteem was statistically significant. | Kim Deokjin | 2020 | Psychology Research2020，10，3： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员