The Scientific Journal of Tra Vinh University最新文献

A RESEARCH OF THE IMPROVEMENT OF THE GAS VELOCITY DISTRIBUTION IN ELECTROSTATIC PRECIPITATOR THROUGH CFD SIMULATION 通过CFD模拟研究改善静电除尘器内气流速度分布的方法

The Scientific Journal of Tra Vinh University Pub Date : 2021-02-15 DOI: 10.35382/18594816.1.42.2021.696

B. Duong, Men Van Truong, Q. T. Le, Tai Tan Phan, Luong Van Truong

{"title":"A RESEARCH OF THE IMPROVEMENT OF THE GAS VELOCITY DISTRIBUTION IN ELECTROSTATIC PRECIPITATOR THROUGH CFD SIMULATION","authors":"B. Duong, Men Van Truong, Q. T. Le, Tai Tan Phan, Luong Van Truong","doi":"10.35382/18594816.1.42.2021.696","DOIUrl":"https://doi.org/10.35382/18594816.1.42.2021.696","url":null,"abstract":"Electrostatic precipitators (ESP) have been widely used in different fields such as thermal power plants, cement plants, production of constructive materials, chemical industry, fertilizer production, . . . due to their advantagesover other dust collector systems. One of the parameters which influences on dust removing efficiency of the ESP devices is the speed and velocity distribution of the polluted gas in the collecting chamber. This paper presents the research results of improving the uniform distribution of the gas velocity in the collecting chamber of ESP using CFD (Computational Fluid Dynamics) simulation. The simulation results showed that as the dispersion plate was installed at the gas inlet of the collecting chamber the velocity distribution of gas flow was more uniform and its direction was more stable towards the outlet. In addition, the dispersion plate also improved the flow stability at different flow rates and the smaller hole diameter on the dispersion plate was better for the velocity distribution and direction in the flow. The research results provide an approach foroptimum design of a ESP with high collection efficiency.","PeriodicalId":318509,"journal":{"name":"The Scientific Journal of Tra Vinh University","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130551983","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

FACTORS AFFECTING CITIZENS’ SATISFACTION WITH THE ONE-STOP-SHOP AT THE PEOPLE’S COMMITTEE OF DUYEN HAI TOWN, TRA VINH PROVINCE 越南越共省端海镇人民委员会的“一站式商店”影响市民满意度的因素

The Scientific Journal of Tra Vinh University Pub Date : 2021-02-15 DOI: 10.35382/18594816.1.42.2021.689

Vinh Hiep Kien, Lan Thanh Le

引用次数: 0

THE CHANGE OF SANDY SOIL PROPERTIES AFTER ADDING CHARCOAL PRODUCED FROM A TRADITIONAL KILN IN THE MEKONG DELTA, VIET NAM 在越南湄公河三角洲，加入传统窑生产的木炭后，沙土性质的变化

The Scientific Journal of Tra Vinh University Pub Date : 2021-02-15 DOI: 10.35382/18594816.1.42.2021.698

B. Huynh, T. Nguyen, Vien My Tran

{"title":"THE CHANGE OF SANDY SOIL PROPERTIES AFTER ADDING CHARCOAL PRODUCED FROM A TRADITIONAL KILN IN THE MEKONG DELTA, VIET NAM","authors":"B. Huynh, T. Nguyen, Vien My Tran","doi":"10.35382/18594816.1.42.2021.698","DOIUrl":"https://doi.org/10.35382/18594816.1.42.2021.698","url":null,"abstract":"This study aimed to use charcoal derived from the bamboo and melaleuca produced by traditional kiln applied to sandy soil growing mustard green (Brassica juncea L.). The charcoals were applied at three ratio (1%,2%, and 3%, which correspond to 10, 20, and 30 g charcoal/kg soil in pots) and the control treatment without charcoal. Soil properties were investigated including bulk density, pH, electrical conductivity (EC), cation exchange capacity (CEC), organic matter content, total nitrogen, and total phosphorous. The results showed that bulk density decreased in charcoal-treated soils. pH and EC were in the suitable range for plants.Nutrients and CEC of the soil in the charcoal treatment were significantly higher compared with the control (CEC increase 6.8% to 16%; TC increase 80% to 115%; TN increase 37.5 to 75%). Green mustard growing on charcoalamended soil had greater height (higher 3% to 21%), bigger leaves, and higher yield (increase18% to 81%) than those of plants groomed in the control treatment. This study showed the potential of using charcoal as supplying nutrient to the poor soil. Moreover, the abundant of raw material and easy to produce, it is suitable for applying in the Mekong Delta, Viet Nam, and other countries with similar conditions and infrastructure. ","PeriodicalId":318509,"journal":{"name":"The Scientific Journal of Tra Vinh University","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121615259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

ANALYSIS OF FACTORS AFFECTING THE EFFICIENCY OF HOUSEHOLDS LOANS USING FROM ECONOMIC DEVELOPMENT CAPITAL OF THE WOMEN’S UNION OF DUYEN HAI DISTRICT, TRA VINH PROVINCE 越共端海区妇联经济发展资金家庭贷款使用效率影响因素分析

The Scientific Journal of Tra Vinh University Pub Date : 2021-02-15 DOI: 10.35382/18594816.1.42.2021.688

Nguyen Ngọc Tung

引用次数: 0

FACTORS INFLUENCING NEW GRADUATES’ START-UP INTENTIONS IN ENGINEERING TECHNOLOGY IN CAN THO CITY 天津市工程技术专业应届毕业生创业意愿的影响因素

The Scientific Journal of Tra Vinh University Pub Date : 2021-02-15 DOI: 10.35382/18594816.1.42.2021.686

Lam Huynh, T. Nguyen, Nha Thanh Huynh

引用次数: 1

CHANGES IN RELIGIOUS ACTIVITIES OF SOUTHERN KHMER THERAVADA BUDDHISTS IN SOC TRANG PROVINCE, VIET NAM, FROM 1986 TO 2015 1986年至2015年越南社庄省南部高棉小乘佛教徒宗教活动的变化

The Scientific Journal of Tra Vinh University Pub Date : 2021-02-15 DOI: 10.35382/18594816.1.42.2021.692

K. Pham, Ly Minh Lam

引用次数: 0

ASSESSING SURFACE WATER QUALITY IN FRESHWATER RESERVOIRS IN AN GIANG PROVINCE, VIET NAM 评估越南江省淡水水库的地表水质量

The Scientific Journal of Tra Vinh University Pub Date : 2021-02-15 DOI: 10.35382/18594816.1.42.2021.694

Gia Thanh Nguyen

{"title":"ASSESSING SURFACE WATER QUALITY IN FRESHWATER RESERVOIRS IN AN GIANG PROVINCE, VIET NAM","authors":"Gia Thanh Nguyen","doi":"10.35382/18594816.1.42.2021.694","DOIUrl":"https://doi.org/10.35382/18594816.1.42.2021.694","url":null,"abstract":"Water quality is critical for a healthy ecosystem, this study was conducted to evaluate the surface water quality in lakes in An Giang Province from 2017 to 2019. Water quality was assessed using variables of temperature, pH, dissolved oxygen (DO), total suspended solids (TSS), chemical oxygen demand (COD), biological oxygen demand (BOD), nitrate (NO3- - N), phosphate (PO3 4- - P ), ammonia (NH+ 4 - N), and coliforms at nine locationsbelonging to seven reservoirs including O Tuk Sa, Thuy Liem, Soai So, Soai Chek, O Thum, O Ta Soc, and Bung Binh Thien. Water quality criteria were assessed according to the National Technical Regulation on Surface Water Quality (QCVN 08-MT: 2015/BTNMT). Cluster analysis (CA) and principal component analysis (PCA)were applied to group water quality to identify the main parameters affecting water quality in the reservoirs. The findings indicated that the water quality in the reservoirs were polluted by TSS, organic matters (DO was low, while COD and BOD were high), and microorganisms (coliforms). The PCA analysis showed that the watervariables including temperature, pH, DO, TSS, COD, BOD, NO3- - N, PO3 4- - P , NO3- - N, and coliforms significantly influenced the surface of the water in the reservoirs. It is necessary to investigate pollution sources to propose appropriate solutions to treat and maintain the water quality in the reservoirs of An Giang Province .","PeriodicalId":318509,"journal":{"name":"The Scientific Journal of Tra Vinh University","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134491122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

ASSESSMENT OF CUSTOMER SATISFACTION ON SERVICE QUALITY AT SAIGON - HANOI COMMERCIAL JOINT STOCK BANK (SHB) 西贡-河内商业股份银行客户对服务质量的满意度评估

The Scientific Journal of Tra Vinh University Pub Date : 2021-02-15 DOI: 10.35382/18594816.1.42.2021.687

Hieu Minh Tran, Anh Hoang Nguyen

引用次数: 0

ASSESSMENT OF SEAFOOD PROCESSING SLUDGE AFTER COMPOSTING ON GROWTH OF TAGETES PATULA L. 海产品加工污泥堆肥后对万寿菊生长的影响。

The Scientific Journal of Tra Vinh University Pub Date : 2021-02-15 DOI: 10.35382/18594816.1.42.2021.697

T. Nguyen, Vien My Tran, B. Huynh

{"title":"ASSESSMENT OF SEAFOOD PROCESSING SLUDGE AFTER COMPOSTING ON GROWTH OF TAGETES PATULA L.","authors":"T. Nguyen, Vien My Tran, B. Huynh","doi":"10.35382/18594816.1.42.2021.697","DOIUrl":"https://doi.org/10.35382/18594816.1.42.2021.697","url":null,"abstract":"Sludge of seafood processing factories discharged directly into the environment can lead to environmental pollution. Research on the use of seafood processing sludge as compost for agriculture in the Mekong Delta is encouraged. The objectives of this study were (1) to evaluate the chemical composition of seafood processingsludge after 60 days composting and (2) to evaluate the growth of Tagetes patula L planted with composted sludge. The sludge composting experiment was carried out with 3 treatments: sludge + Trichoderma fungi; sludge + chicken manure + Trichoderma fungi; sludge + straw + chicken manure + Trichoderma fungi. The results showed that the treatment of sludge + straw + chicken manure + Trichoderma fungi had a betterquality than the other two treatments. The pH, TC, TN, NH+ 4 , NO- 3 , TP, PO3 4- and heavy metal(Pb, Cd, Cr, Cu, Ni, Zn and Hg) contents of sludge meet the environmental standard of Viet Nam (10TCN526:2002). E. coli and Salmonella were not present at the end of the composting experiment. Tagetes patula L grew and flowered on all 4 treatments: control – composted straw; sludge + Trichoderma fungi; sludge + chicken manure + Trichoderma fungi; sludge + straw + chicken manure + Trichoderma fungi. However,Tagetes patula L grew best on the sludge + Trichoderma fungi experimental condition .","PeriodicalId":318509,"journal":{"name":"The Scientific Journal of Tra Vinh University","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122426358","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

ESTIMATING THE INTERNAL FORCES OF RAFT IN PILED RAFT FOUNDATION FOR NORMAL AND GROUNDWATER PUMPING CONDITIONS: A CASE STUDY SOC TRANG PROVINCE, VIETNAM 在正常和地下水抽水条件下，桩筏基础中筏板的内力估算:以越南trang省为例

The Scientific Journal of Tra Vinh University Pub Date : 2021-02-15 DOI: 10.35382/18594816.1.42.2021.695

H. V. Huynh, Tri Huu Huynh, Truyen Gia Ngo, T. V. Tran

引用次数: 0