Pub Date : 2019-04-15DOI: 10.32508/STDJ.V20IK9.1675
T. Vo, Chi B. Vo, H. Nguyễn, L. Le, Domash Vi, Nguyen Thi Huong Thao
In this study, salmon by-products were utilised to produce high ash content (AC) salmon bone powder (SBP) using hydrolytic enzyme and apply in the production of Tra catfish cake. The by- products included 61.9% of moisture, 43.1% of protein, 45.4% of lipid, 10.2% of ash, 3.7% of calcium and 2.3% of phosphorus (on dry weight basis). The AC of SBP achieved the maximal value of 46.9% when hydrolytic enzyme of Alcalase, pH value of 6.5, temperature of 60oC, the Enzyme/Substrate (E/S) ratio of 60 U/g protein and time of 4 hours. The obtained SBP contained 23.1% of calcium, 11.7% of phosphorus and without heavy metals such as cadmium, mercury and lead. The fish cake added with 2% of SBP owned the highest gel strength, folding score and whiteness of 287.4, AA and 65.3, respectively and it was accepted by the test panel. Hence, SBP could be used in the production of Tra catfish cake as a mineral supplement.
{"title":"Recovery of bone powder from salmon by- product and application in production of Tra catfish cake","authors":"T. Vo, Chi B. Vo, H. Nguyễn, L. Le, Domash Vi, Nguyen Thi Huong Thao","doi":"10.32508/STDJ.V20IK9.1675","DOIUrl":"https://doi.org/10.32508/STDJ.V20IK9.1675","url":null,"abstract":"In this study, salmon by-products were utilised to produce high ash content (AC) salmon bone powder (SBP) using hydrolytic enzyme and apply in the production of Tra catfish cake. The by- products included 61.9% of moisture, 43.1% of protein, 45.4% of lipid, 10.2% of ash, 3.7% of calcium and 2.3% of phosphorus (on dry weight basis). The AC of SBP achieved the maximal value of 46.9% when hydrolytic enzyme of Alcalase, pH value of 6.5, temperature of 60oC, the Enzyme/Substrate (E/S) ratio of 60 U/g protein and time of 4 hours. The obtained SBP contained 23.1% of calcium, 11.7% of phosphorus and without heavy metals such as cadmium, mercury and lead. The fish cake added with 2% of SBP owned the highest gel strength, folding score and whiteness of 287.4, AA and 65.3, respectively and it was accepted by the test panel. Hence, SBP could be used in the production of Tra catfish cake as a mineral supplement.","PeriodicalId":285953,"journal":{"name":"Science and Technology Development Journal","volume":"2016 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126005672","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}
Pub Date : 2019-04-15DOI: 10.32508/STDJ.V20IK9.1676
A. Nguyen, Tam Le, V. Q. Tran, Viet Ngoc Truong, L. Nguyen, Phi Hoang Tan Nguyen, T. T. H. Nguyen
Constructed wetland is a low cost, effective technology and it is still in the state of improvement to enhance the treatment efficiency, especially in nutrient and trace elements treatment. This study investigated the effect of aerobic and anoxic conditions in Horizontal Subsurface Flow Constructed Wetland (HSFCW) on nutrient, organic, metal and Octylphenol - OP (Endocrine disrupting chemical) treatment. Two HSFCWs were constructed: HSFCW1 with three aerobic compartments; HSFCW2 with two aerobic compartments, one anoxic compartment. The two HSFCWs had the same design parameters (fiters, plants), except oxygen conditions. The results showed that aerobic and anoxic HSFCW may increase the efficiency of Nitrogen removal by 10%, but decreased by 11% in the efficiency of OP treatment (one of the EDCs). The efficiency of treatment of pollutants, including NH4+-N, COD, TP, Mn, Fe, Al and Cu between two HSFCWs were not significantly different; the average efficiency was 99%, 84%, 97%, 96%, 96%, 72% and 73%, respectively. Therefore, the anoxic compartment of HSFCW still provided the effective removal of organic matter, Manuscript received September 29th, 2017; accepted 24th December, 2017 This study was funded by CARE RESCIF under grant number Tc-TTC-2017-05. An Truong Nguyen, Tam Minh Thi Le, Viet Quoc Tran, Trang Huyen Thi Nguyen are with the CARE, Ho Chi Minh City University of Technology, VNU-HCM, Vietnam (truongan.hcmut@gmail.com, minhtamnt2006@hcmut.edu.vn, ngthtrang@hcmut.edu.vn) Viet Ngoc Truong, Luan Thanh Nguyen, Phi Hoang Tan Nguyen are with the Faculty of Environment and Natural Resources, Ho Chi Minh City University of Technology, VNU- HCM, Vietnam (truongngocviet93@gmail.com) metals and octylphenol, but it also improved nitrogen removal efficiency by up to 92%.
{"title":"Effect of oxygen states in horizontal subsurface flow constructed wetlands on the removal of organic matter, nutrients, some metals and octylphenol","authors":"A. Nguyen, Tam Le, V. Q. Tran, Viet Ngoc Truong, L. Nguyen, Phi Hoang Tan Nguyen, T. T. H. Nguyen","doi":"10.32508/STDJ.V20IK9.1676","DOIUrl":"https://doi.org/10.32508/STDJ.V20IK9.1676","url":null,"abstract":"Constructed wetland is a low cost, effective technology and it is still in the state of improvement to enhance the treatment efficiency, especially in nutrient and trace elements treatment. This study investigated the effect of aerobic and anoxic conditions in Horizontal Subsurface Flow Constructed Wetland (HSFCW) on nutrient, organic, metal and Octylphenol - OP (Endocrine disrupting chemical) treatment. Two HSFCWs were constructed: HSFCW1 with three aerobic compartments; HSFCW2 with two aerobic compartments, one anoxic compartment. The two HSFCWs had the same design parameters (fiters, plants), except oxygen conditions. The results showed that aerobic and anoxic HSFCW may increase the efficiency of Nitrogen removal by 10%, but decreased by 11% in the efficiency of OP treatment (one of the EDCs). The efficiency of treatment of pollutants, including NH4+-N, COD, TP, Mn, Fe, Al and Cu between two HSFCWs were not significantly different; the average efficiency was 99%, 84%, 97%, 96%, 96%, 72% and 73%, respectively. Therefore, the anoxic compartment of HSFCW still provided the effective removal of organic matter, Manuscript received September 29th, 2017; accepted 24th December, 2017 This study was funded by CARE RESCIF under grant number Tc-TTC-2017-05. An Truong Nguyen, Tam Minh Thi Le, Viet Quoc Tran, Trang Huyen Thi Nguyen are with the CARE, Ho Chi Minh City University of Technology, VNU-HCM, Vietnam (truongan.hcmut@gmail.com, minhtamnt2006@hcmut.edu.vn, ngthtrang@hcmut.edu.vn) Viet Ngoc Truong, Luan Thanh Nguyen, Phi Hoang Tan Nguyen are with the Faculty of Environment and Natural Resources, Ho Chi Minh City University of Technology, VNU- HCM, Vietnam (truongngocviet93@gmail.com) metals and octylphenol, but it also improved nitrogen removal efficiency by up to 92%.","PeriodicalId":285953,"journal":{"name":"Science and Technology Development Journal","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131057858","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}
Pub Date : 2019-04-15DOI: 10.32508/STDJ.V20IK9.1673
Le Thi Thu Thuy, Phan Thi Tuoi, Q. T. Tho
Entity co-reference resolution and sentiment analysis are independent problems and popular research topics in the community of natural language processing. However, the combination of those two problems has not been getting much attention. Thus, this paper susgests to apply knowledge base to solve co- reference between object and aspect with sentiment. In addition, the paper also proposes the model of Ontology-based co-reference resolution in sentiment analysis for English text. Finally, we also discuss evaluation methods applied for our model and the results obtained.
{"title":"Coreference resolution Ontology-based in sentiment analysis","authors":"Le Thi Thu Thuy, Phan Thi Tuoi, Q. T. Tho","doi":"10.32508/STDJ.V20IK9.1673","DOIUrl":"https://doi.org/10.32508/STDJ.V20IK9.1673","url":null,"abstract":"Entity co-reference resolution and sentiment analysis are independent problems and popular research topics in the community of natural language processing. However, the combination of those two problems has not been getting much attention. Thus, this paper susgests to apply knowledge base to solve co- reference between object and aspect with sentiment. In addition, the paper also proposes the model of Ontology-based co-reference resolution in sentiment analysis for English text. Finally, we also discuss evaluation methods applied for our model and the results obtained.","PeriodicalId":285953,"journal":{"name":"Science and Technology Development Journal","volume":"102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122479665","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}
Pub Date : 2019-04-15DOI: 10.32508/STDJ.V20IK9.1677
Nguyen Dai Long, N. M. Hung, Lê Dương Hải, Nguyễn Thị Thanh Hằng, Huynh Minh Thua
It is expected that a certain amount of natural gas from Nam Con Son Pipeline No. 2 (Stage 2) which will be received from various new gas fields (e.g. Thien Ung, Dai Hung, Su Tu Trang, Sao Vang, Dai Nguyet) and from an existing Nam Con Son Pipeline No. 1. Besides the current utilisations (e.g. for power generation and fertilizer production), the use of natural gas for petrochemical production have attracted more attention due to a value chain increase and for petrochemical development. In Vietnam, the fertilizer production from natural gas via methane value chain is only used. However, with an estimated capacity of 7-10 milion cubic meter per day (MMSCD) and the ethane concentration of 7-8%, the separation and processing of ethane (200-300 thousand ton per year) is one of potential solution for increasing the gas processing margin. In this study, therefore, an evaluation of ethane gas processing for petrochemical production was conducted based on various marketing, technical and economic aspects. The result revealed that high density polyethylene (HDPE) shows the best scenarios owing to high economic efficiency, well-known technology, high demand but lack of supply. The finding might provide a valuable strategy for deep processing of domestic gas.
{"title":"Evaluation of deep processing of Ethane for petrochemical production from domestic natural gas","authors":"Nguyen Dai Long, N. M. Hung, Lê Dương Hải, Nguyễn Thị Thanh Hằng, Huynh Minh Thua","doi":"10.32508/STDJ.V20IK9.1677","DOIUrl":"https://doi.org/10.32508/STDJ.V20IK9.1677","url":null,"abstract":"It is expected that a certain amount of natural gas from Nam Con Son Pipeline No. 2 (Stage 2) which will be received from various new gas fields (e.g. Thien Ung, Dai Hung, Su Tu Trang, Sao Vang, Dai Nguyet) and from an existing Nam Con Son Pipeline No. 1. Besides the current utilisations (e.g. for power generation and fertilizer production), the use of natural gas for petrochemical production have attracted more attention due to a value chain increase and for petrochemical development. In Vietnam, the fertilizer production from natural gas via methane value chain is only used. However, with an estimated capacity of 7-10 milion cubic meter per day (MMSCD) and the ethane concentration of 7-8%, the separation and processing of ethane (200-300 thousand ton per year) is one of potential solution for increasing the gas processing margin. In this study, therefore, an evaluation of ethane gas processing for petrochemical production was conducted based on various marketing, technical and economic aspects. The result revealed that high density polyethylene (HDPE) shows the best scenarios owing to high economic efficiency, well-known technology, high demand but lack of supply. The finding might provide a valuable strategy for deep processing of domestic gas.","PeriodicalId":285953,"journal":{"name":"Science and Technology Development Journal","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125652294","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}
The consecutive-interpolation technique has been introduced as a tool enhanced into traditional finite element procedure to provide higher accurate solution. Furthermore, the gradient fields obtained by the proposed approach, namely consecutive-interpolation finite element method (CFEM), are smooth, instead of being discontinuous across nodes as in FEM. In this paper, the technique is applied to analyze transient heat transfer problems. In order increase time efficiency, a model- reduction technique, namely the proper orthogonal decomposition (POD), is employed. The idea is that a given large-size problem is projected into a small-size one which can be solved faster but still maintain the required accuracy. The optimal POD basis for projection is determined by mathematical operations. With the combination of the two novel techniques, i.e. consecutive-interpolation and proper orthogonal decomposition, the advantages of numerical solution obtained by CFEM are expected to be maintained, while computational time can be significantly saved.
{"title":"Efficient numerical analysis of transient heat transfer by Consecutive-Interpolation and Proper Orthogonal Decomposition","authors":"N. Minh, Nguyen Thanh Nha, Truong Tich Thien, Bui Quoc Tinh","doi":"10.32508/STDJ.V20IK9.1671","DOIUrl":"https://doi.org/10.32508/STDJ.V20IK9.1671","url":null,"abstract":"The consecutive-interpolation technique has been introduced as a tool enhanced into traditional finite element procedure to provide higher accurate solution. Furthermore, the gradient fields obtained by the proposed approach, namely consecutive-interpolation finite element method (CFEM), are smooth, instead of being discontinuous across nodes as in FEM. In this paper, the technique is applied to analyze transient heat transfer problems. In order increase time efficiency, a model- reduction technique, namely the proper orthogonal decomposition (POD), is employed. The idea is that a given large-size problem is projected into a small-size one which can be solved faster but still maintain the required accuracy. The optimal POD basis for projection is determined by mathematical operations. With the combination of the two novel techniques, i.e. consecutive-interpolation and proper orthogonal decomposition, the advantages of numerical solution obtained by CFEM are expected to be maintained, while computational time can be significantly saved.","PeriodicalId":285953,"journal":{"name":"Science and Technology Development Journal","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114629734","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}
Pub Date : 2019-04-15DOI: 10.32508/STDJ.V20IK9.1672
Truong Hoang Bao Huy, V. N. Dieu
Economic operation of the electric energy generating system is one of the common problems in power system. This paper presents a new metaheuristic optimization method, the Search Group Algorithm (SGA) for solving optimal power flow (OPF) problem. The proposed method is tested for 11 different cases on the IEEE 30-bus and IEEE-118 bus systems, in which the IEEE 30-bus system is tested with different objective functions including quadratic function, valve point effects and multiple fuels. The obtained results are compared with some well-known optimization algorithms to emphasize the effectiveness of the SGA method for solving different OPF problems with complicated functions.
{"title":"A search group algorithm for optimal power flow in power systems","authors":"Truong Hoang Bao Huy, V. N. Dieu","doi":"10.32508/STDJ.V20IK9.1672","DOIUrl":"https://doi.org/10.32508/STDJ.V20IK9.1672","url":null,"abstract":"Economic operation of the electric energy generating system is one of the common problems in power system. This paper presents a new metaheuristic optimization method, the Search Group Algorithm (SGA) for solving optimal power flow (OPF) problem. The proposed method is tested for 11 different cases on the IEEE 30-bus and IEEE-118 bus systems, in which the IEEE 30-bus system is tested with different objective functions including quadratic function, valve point effects and multiple fuels. The obtained results are compared with some well-known optimization algorithms to emphasize the effectiveness of the SGA method for solving different OPF problems with complicated functions.","PeriodicalId":285953,"journal":{"name":"Science and Technology Development Journal","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131540064","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}
Pub Date : 2019-04-15DOI: 10.32508/STDJ.V20IK9.1674
K. L. T. Chung, Phan Thi Hai Ha, Lenée Son
Located in a flat plain with an extensive covering of very soft clay, Ho Chi Minh city is still in its urbanization and urban expansion with an inevitable development in construction at rapid pace. SHANSEP parameters for soft clay in HCM City will be helpful for geotechnical engineers in quantifying the behavior of soft clay and proposing suitable solutions for soft ground improvement. This paper presents the results of 100 CIUC triaxial tests on 20 clay samples belonging to two different groups of soft clay (taken in Binh Thanh and Nha Be districts) tested with 5 different modes of OCRs, i.e. 1, 1.5, 2, 4, and 6. The test results are analyzed to obtain SHANSEP models with really high coefficient of determination (R2 ≈ 1).
{"title":"Evaluation of SHANSEP parameters for soft clay in HCM City","authors":"K. L. T. Chung, Phan Thi Hai Ha, Lenée Son","doi":"10.32508/STDJ.V20IK9.1674","DOIUrl":"https://doi.org/10.32508/STDJ.V20IK9.1674","url":null,"abstract":"Located in a flat plain with an extensive covering of very soft clay, Ho Chi Minh city is still in its urbanization and urban expansion with an inevitable development in construction at rapid pace. SHANSEP parameters for soft clay in HCM City will be helpful for geotechnical engineers in quantifying the behavior of soft clay and proposing suitable solutions for soft ground improvement. This paper presents the results of 100 CIUC triaxial tests on 20 clay samples belonging to two different groups of soft clay (taken in Binh Thanh and Nha Be districts) tested with 5 different modes of OCRs, i.e. 1, 1.5, 2, 4, and 6. The test results are analyzed to obtain SHANSEP models with really high coefficient of determination (R2 ≈ 1).","PeriodicalId":285953,"journal":{"name":"Science and Technology Development Journal","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127865633","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}
Pub Date : 2019-04-13DOI: 10.32508/STDJ.V20IK8.1670
N. M. Hung, Hoang Dinh Tien, Nguyễn Việt Kỳ
Pr/nC17 and Ph/nC18 are normally available in geochemical analysis report. The data used to define sediment deposition environment and maturity. In this study, the comparison between Pr/nC17 and Ph/nC18 data from extracted mature rock and in crude oil regading to stratigraphy to reveal their relationship with oil&gas migration parth. The study results showed that Pr/nC17 and Ph/nC18 from extracted and crude oil reflect original oil and migration parth. Crude oil producing in Miocene & upper Oligocene and Lower Oligocene& Basement are mainly from Lower Oligocene+ Eocene? (E+F) source rock and one part of crude oil is generated from bottom part of formation D but only in most subsidising area of depression in central part of Cuu Long basin.
{"title":"Predict original oil&gas and migration path in Cuu Long basin by Pr/nC17 and Ph/nC18","authors":"N. M. Hung, Hoang Dinh Tien, Nguyễn Việt Kỳ","doi":"10.32508/STDJ.V20IK8.1670","DOIUrl":"https://doi.org/10.32508/STDJ.V20IK8.1670","url":null,"abstract":"Pr/nC17 and Ph/nC18 are normally available in geochemical analysis report. The data used to define sediment deposition environment and maturity. In this study, the comparison between Pr/nC17 and Ph/nC18 data from extracted mature rock and in crude oil regading to stratigraphy to reveal their relationship with oil&gas migration parth. The study results showed that Pr/nC17 and Ph/nC18 from extracted and crude oil reflect original oil and migration parth. Crude oil producing in Miocene & upper Oligocene and Lower Oligocene& Basement are mainly from Lower Oligocene+ Eocene? (E+F) source rock and one part of crude oil is generated from bottom part of formation D but only in most subsidising area of depression in central part of Cuu Long basin.","PeriodicalId":285953,"journal":{"name":"Science and Technology Development Journal","volume":"91 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130372452","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}
Pub Date : 2019-04-13DOI: 10.32508/STDJ.V20IK8.1669
N. T. An, Le Thi Minh Tam, Tran Quoc Viet, Truong Ngoc Viet, N. T. Luan, Nguyen Van Minh, Nguyễn Thị Huyền Trang, Dinh Quoc Tuc
Industrial sludge is a by-product which is enormously generated in wastewater treatment plants. Constructed wetland for sludge treatment (CWST) is a low cost, effective technology. This study investigated the effect of various design and operation parameters on the efficiency of four pilot-scale CWSTs to determine the optimal parameters by using the Analytic Hierarchy Process (AHP) for Decision- Making. The wetland units were planted with Phragmites australis or Typha angustifolia, operated with four sludge loading rate (SLR) (50, 60, 70 and 80 L/m2) and monitored in six different hydraulic retention time (HRT) (2,5,7,9,12 and 14 days). AHP results provided the optimal key parameters (vegetation of P. australis, 14-day HRT, SLR of 60 L/m2) which gave the most effective sludge treatment, reducing 99.8%, 95.16% and 98.23% for COD, TKN and TP, respectively. The results also showed that HRT, SLR and vegetation remarkably affected to the efficiency of CWST. In addition, AHP is an effective method to determine the optimal design and operation parameters of CWST.
工业污泥是污水处理厂大量产生的副产品。人工湿地污泥处理(CWST)是一种低成本、高效的污泥处理技术。本研究采用层次分析法(AHP)对4个中试规模CWSTs的设计和运行参数进行了研究，以确定最佳的设计和运行参数。湿地单元分别种植芦苇和叶柏，以4种污泥负荷率(50、60、70和80 L/m2)运行，并以6种不同的水力滞留时间(HRT)(2、5、7、9、12和14天)进行监测。AHP结果提供了最优的关键参数(南螺旋藻植被、14 d HRT、SLR为60 L/m2)，污泥处理效果最佳，COD、TKN和TP分别降低99.8%、95.16%和98.23%。HRT、SLR和植被对CWST效率影响显著。此外，AHP是确定CWST优化设计和运行参数的有效方法。
{"title":"Recommendation of optimal design and operation parameters for constructed wetland for sludge treatment based on the effect of hydraulic retention time, sludge loading rate and vegetation","authors":"N. T. An, Le Thi Minh Tam, Tran Quoc Viet, Truong Ngoc Viet, N. T. Luan, Nguyen Van Minh, Nguyễn Thị Huyền Trang, Dinh Quoc Tuc","doi":"10.32508/STDJ.V20IK8.1669","DOIUrl":"https://doi.org/10.32508/STDJ.V20IK8.1669","url":null,"abstract":"Industrial sludge is a by-product which is enormously generated in wastewater treatment plants. Constructed wetland for sludge treatment (CWST) is a low cost, effective technology. This study investigated the effect of various design and operation parameters on the efficiency of four pilot-scale CWSTs to determine the optimal parameters by using the Analytic Hierarchy Process (AHP) for Decision- Making. The wetland units were planted with Phragmites australis or Typha angustifolia, operated with four sludge loading rate (SLR) (50, 60, 70 and 80 L/m2) and monitored in six different hydraulic retention time (HRT) (2,5,7,9,12 and 14 days). AHP results provided the optimal key parameters (vegetation of P. australis, 14-day HRT, SLR of 60 L/m2) which gave the most effective sludge treatment, reducing 99.8%, 95.16% and 98.23% for COD, TKN and TP, respectively. The results also showed that HRT, SLR and vegetation remarkably affected to the efficiency of CWST. In addition, AHP is an effective method to determine the optimal design and operation parameters of CWST. \u0000 ","PeriodicalId":285953,"journal":{"name":"Science and Technology Development Journal","volume":"147 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114786302","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}
Pub Date : 2019-04-13DOI: 10.32508/STDJ.V20IK8.1665
P. Binh, N. T. Dung, V. Cuong
The power management in micro grid (MG) is related to the planning of dispatchable sources such as diesel generator or storage devices due to the fluctuation of output power of renewable sources like wind and solar. In the island mode, to balance the power in the case of output changing from wind and solar sources, the control trategy such as regulating the power of dispatchable generators and load shedding is necessary. This paper introduced the way to determine the load amount be shed for N ahead moment, based on conflict multi objectives, applying the Particle Swarm optimization algorithm and Belman-Zadeh principle to find out the strategy of generating the power in MG. The application for one medium voltage MG is also presented.
{"title":"Energy management of Micro grid in the island mode","authors":"P. Binh, N. T. Dung, V. Cuong","doi":"10.32508/STDJ.V20IK8.1665","DOIUrl":"https://doi.org/10.32508/STDJ.V20IK8.1665","url":null,"abstract":"The power management in micro grid (MG) is related to the planning of dispatchable sources such as diesel generator or storage devices due to the fluctuation of output power of renewable sources like wind and solar. In the island mode, to balance the power in the case of output changing from wind and solar sources, the control trategy such as regulating the power of dispatchable generators and load shedding is necessary. This paper introduced the way to determine the load amount be shed for N ahead moment, based on conflict multi objectives, applying the Particle Swarm optimization algorithm and Belman-Zadeh principle to find out the strategy of generating the power in MG. The application for one medium voltage MG is also presented.","PeriodicalId":285953,"journal":{"name":"Science and Technology Development Journal","volume":"16 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126058969","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}
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