MATERIAL FLOW ANALYSIS (MFA) AND ENERGY BALANCE ANALYSIS (EBA) AS TECHNICAL TOOLS FOR WASTEWATER POLLUTION CONTROL IN TEXTILE AND DYEING INDUSTRY – A CASE STUDY

The textile and dyeing industry consumes a large amount of water and discharges to the environment many pollutants including dyestuffs, auxiliaries, others. In this study, a selected textile and dyeing company was representing modern factory in Vietnam. Using STAN software, the authors have quantified and analyzed the material flows of the production lines and of the main pollutants in wastewater. Comparing with “business as usual” scenario, a new scenario with treatment and reuse of wastewater has been introduced. The discharge volume of wastewater from company was about 3,608.96 m3/day (or 1,317,270.4 m3/year). Loadings of the main pollutants in wastewater as COD, TSS, T-P and T-N were 1419.95, 1571.36, 17.77 and 50.16 ton/year, respectively. One meter of produced fabric consumes 0.025 m3 of water. Energy consumption of the wastewater treatment station was analyzed by SANKEY software. The energy consumption rate was 1.695 kWh per m3 of wastewater. Reuse of wastewater could save 1,129.05 kWh per day of electricity and 1,804.48 m3 per day of fresh water to be taken from the river source. Ozonation was the most consuming energy process at the wastewater treatment station, accounting for 58.88% of total wastewater treatment energy consumption

ANALYSIS OF PRESCRIPTION INDICATORS FOR OUTPATIENTS WITH HEALTH INSURANCE IN OUTPATIENTS DEPARTMENT AT CAN THO UNIVERSITY OF MEDICINE AND PHARMACY HOSPITAL IN THE PERIOD 2017-2018

Objective: The main objective of this study was to evaluate the drug prescription parameters and to find out the elements had an influence on the prescribing practice of doctors’. Methods: A descriptive cross-sectional study was conducted to collect 300 outpatient drug prescriptions and 30 questionnaires of physicians during the period of 2017-2018. The data were analyzed according to WHO’s the guideline. Results: Average number of drug per prescription: 3.73, percentage of drugs prescribed by generic or international name (INN): 100%, percentage of prescriptions with an antibiotic prescribed: 24%, of β-lactam antibiotics group, including cephalosporin (31.17%) and aminopenicillin (27.27%), accounted for the highest percentage of using in antibiotic groups with a total of 58.44%, of corticosteroid: 12%, of vitamin: 27.3%, of drugs prescribed including in the Essential Medicines List issued by the Ministry of Health: 35.3%. Average drug cost per prescription: 88,867 VNĐ. Percentage of drug costs for antibiotics (%): 7.48%, of corticosteroids (%): 1.85% and of vitamins (%): 5.25%. Conclusion: The results of this research have identified some prescription indicators and elements affect the prescription indicators such as drug information, patient, drug, which may lead to intervention studies for evaluating changes in these issues in the outpatient clinic

EVALUATION OF PRESCRIBING INDICATORS FOR PEADIATRIC OUTPATIENTS UNDER SIX YEARS OLD IN DISTRICT HOSPITALS OF CAN THO CITY IN THE PERIOD OF 2015-2016

Objective: Examining and comparing the primary and supplementary prescribing indicators in pediatric outpatients under six years old. Methods: We performed a comparative cross-sectional study, over nine months, from September 2015. 800 prescriptions for peadiatric patients under 6 y old were collected at 8 district hospitals in Can Tho city to evaluate the primary and supplementary prescribing indicators. The sample was collected prospectively by the systematic selection, with the interval between the patients is 5. The data was analysed and compared to the standard drug use indicators in developing countries recommended by WHO. Results: Average number of drugs per encounter: 4.1, percentage of drugs prescribed by generic name: 94.2%, percentage of encounters with an antibiotic prescribed: 85.8%, percentage of drugs prescribed from essential drugs list by Ministry of Health: 78.7%, percentage of encounters with a corticoid prescribed: 41.7%, percentage of encounters with a vitamin prescribed: 13.1%, average drug cost per encounter: 37.5 thousands VND, percentage of drug costs spent on antibiotics: 55.2%, percentage of drug costs spent on essential drugs: 75.7%, percentage of drug costs spent on corticoid: 1.9%, percentage of drug costs spent on vitamin: 1.4%. Conclusion: The results of this research have identified some issues in outpatient prescribing, which may lead to intervention studies for evaluating changes in these issues in the outpatient clinic

NUTRIENT RECOVERY AND POLLUTANT REMOVAL FROM PIGGERY WASTEWATER BY SPIRULINA CULTIVATION

Spirulina is noticed for great applications on food supplements, animal feeds, pharmaceutical, cosmetics, biofuel, fertilizer, etc. Spirulina cultures in wastewaters could enhance the feasibility of commodities due to its ability to reduce the cost of biomass production and remove pollutants in wastewaters. This study investigates the effects of wastewater pretreatment using various aeration periods (i.e. from 3 to 7 days), the supplement of bicarbonate and N:P ratios on the growth of Spirulina sp. HH to produce protein-rich biomass. The work showed that Spirulina sp. had the ability to effectively remove ammonium, with the highest efficiencies up to 99.9 %. However, the high concentration of ammonium in wastewater, from 125 mg N/L upward, caused a decline in the growth rate of Spirulina. The growth and remediation potential of Spirulina sp. were in the best condition with the N:P ratio of the medium in the range of 19:1-22:1. This study suggested a procedure to cultivate Spirulina sp. in piggery wastewater and remove pollutants efficiently

Characteristics of Simulated Workplace Neutron Standard Fields

This paper presents the development of simulated workplace neutron standard fields at the Institute for Nuclear Science and Technology with the 241Am-Be source moderated by polyethylene spheres with diameters of 15 cm and 30 cm. The characterization of the standard fields (in terms of neutron fluence rates and neutron ambient dose equivalent rates) was performed using Bonner sphere spectrometer system together with MAXED and FRUIT unfolding codes. The related quantities such as neutron dose equivalent-averaged energies and fluence-to-ambient dose equivalent conversion coefficients were also determined. The discrepancies of values are satisfied the standard uncertainty criteria as recommended by the International Standard Organization 12789 series. It implies that the simulated workplace neutron standard fields can be applied in the practical works for calibration purposes

DIFFICULTIES IN STUDYING TOEIC LISTENING COMPREHENSION OF NON–ENGLISH MAJORED FRESHMEN AT TAY DO UNIVERSITY, VIETNAM

TOEIC Certificate is becoming more and more popular all over the world in general and in particular, Vietnam. It is considered as one of the most compulsory demands for graduating university, especially at Tay Do university. Listening seems to be a skill that many students usually face difficulties in learning. Therefore, the survey research “Difficulties in studying TOEIC Listening Comprehension of non – English majored freshmen at Tay Do University” was conducted to figure out common difficulties in studying TOEIC listening of non-English majored students. Freshmen of Bachelor of Tourism and Travel Management class at Tay Do university were chosen as the participants. Questionnaire and interview were used as instruments to collect the data. The findings of the study would point out learners’ difficulties consisting of general difficulties (vocabulary, pronunciation, background knowledge and psychological) and difficulties in each part in the TOEIC listening test. Thanks to the results, some solutions would be suggested for students’ improvement. Article visualizations

Ho Chi Minh's Thoughts On Control Of The State's Power And Lessons For Vietnam

In Vietnam, the State’s power is unified, agencies shall assign, coordinate and control each other in the exercises of the legislative, executive, and judicial powers. This is necessary to prevent abuse of power and ensure the state’s power. The Constitution 1946 was written by Ho Chi Minh (1890 -1969) and created a mechanism and foundation to control the state’s power in Vietnam. Nearly, in the Constitution 2013, the issue of controlling state power is recorded. The assignment and control are reflected in the assignment of the scope of power to each state agency. From the approach of philosophical, social philosophy, and political philosophy, through research and analysis documents in Ho Chi Minh Complete Collection; of previous researchers and policies, legal of Vietnam’s Government on control of the state's power and lessons for Vietnam today. The result shows that Ho Chi Minh’s thought on controlling power has shown the basic contents related to asserting that the power owner belongs to the people and focusing on supervision; use the Constitution to limit state power. The article also gives experiences when studying Ho Chi Minh's thoughts on state power control over Vietnam today