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Monitoring and Control of some Pollutant Parametersin Livestock Wastewater Treatment Process

Ngo Phuong Thuy, Nguyen Thi Hien

Date Received: 01-12-2021 / Date Accepted: 27-05-2022
This study aimed to build a monitoring and control system of some pollutant parameters (pH, COD, BOD) in the balancing tank during the livestock wastewater treatment process by using PLC.TIA Portal 15.1 sofware allows simple monitoring and control interface design, easy for users. The assay process is carried out in the laboratory, showed that the monitoring interface enables us to visually monitor the system's operation, in which the pH, COD and BOD parameters are displayed numerically or graphically in real time, device operation is shown by changing color state.
Assessment of Surface Water Quality in Lang Sen Wetland Reserve Tan Hung District, Long An Province in Dry Season

Le Diem Kieu, Pham Quoc Nguyen

Date Received: 20-07-2023 / Date Accepted: 19-02-2025 / Date Published: 28-02-2025
The study was conducted to assess the current status of surface water quality in Lang Sen Wetland Reserve, Long An Province. Surface water quality of the reserve was surveyed in the dry season at 5, 6, 9, 10, 11 and 12 sub-zone (3 sample points/ sub-zone) using physical and chemical parameters of water. The results showed that the concentrations of total suspended solids, dissolved oxygen, chemical oxygen, total nitrogenof water in the sub-zones ranging 16.8-30.9; 0.67-1.73; 15.5-44.3; 0.99-3.34 mg/l, respectively, not meeting the standard justified in QCVN 08:2023/BTNMT. In addition, the electrical conductivity, total dissolved solids, turbidity, and nitrite nitrogen were also high that may affect aquatic organisms. Therefore, it is necessary to take measures to effectively monitor and manage water quality, especially in sub-zones 9 and 10 to ensure a favorable water environment for the conservation of large fish species in the reserve.
DOI: https://doi.org/10.31817/tckhnnvn.2025.23.2.09
Optimization of Saliva Sample Processing to Increase Sensitivity in Diagnosis of African Swine Fever

Le Tran Hoang Anh, Bui Le Thuy, Dang Thi Hang, Tran Thi My An, Dam Quoc Khanh, Mai Thi Ngan

Date Received: 05-10-2024 / Date Accepted: 17-01-2025 / Date Published: 23-01-2025
African swine fever (ASF) is a dangerous infectious disease with a mortality rate of up to 100%. Collecting saliva samples for diagnosis to monitor ASF has many advantages, but the low viral load in saliva samples, it affects the sensitivity of diagnostic methods. This study improved the saliva sample processing to increase the sensitivity of the diagnosis method. Semi-alkaline proteinase (SAP) and Polyethylene glycol (PEG) were used to process saliva samples. The optimal volume ratio of SAP and PEG solutions to saliva samples was 1:3 and 1:0.4, respectively. The results of ASFV diagnosis from saliva samples after processing with SAP and PEG showed increased sensitivity of real-time PCR reaction. Of 12 field samples, 7/12 samples gave positive results after processing with SAP and PEG compared to only 4/12 positive samples when not processed with SAP and PEG. Thus, applying the saliva sample processing increased the sensitivity of the real-time PCR method in ASF diagnosis, promising to be a useful support tool for ASF surveillance.
DOI: https://doi.org/10.31817/tckhnnvn.2025.23.1.04
Developing Web Applications to Support Teaching and Learning Management at the Department Level

Vu Thi Luu, Pham Thi Lan Anh

Date Received: 08-02-2025 / Date Published: 21-02-2025
This study proposed a solution to support the management of teachinhg and learning activities at the Department level. The software solution was built based on a survey of the actual needs in professional management at the Departments of the Faculty of Information Technology. We have collected data, standardized, organized, stored and managed data uniformly on a web platform to help managers as well as lecturers easily manage, monitor, search and compile information related to teaching activities and archiving work of the department. The program was built according to the steps in the software development process with full functions such as: managing teaching assignments, managing courses documents, managing the storage of academic records, information for specialized internship topics and graduation theses of students, assigning exam schedules, exams evaluation, managing work and other activities at the Department level. Currently, the application has been installed and tested at the Department of Computer Science and has been highly appreciated by teachers in the unit. The program has the potential to be expanded and adopted in other units within Vietnam National University of Agriculture.
DOI: https://doi.org/10.1234/bq4szm58
Reproductive Performance and Egg Quality ofVan Linh chickens raised at Vietnam National University of Agriculture

Duong Thu Huong, Nguyen Thi Chau Giang, Nguyen Van Thong, Nguyen Khanh Toan, Pham Van Son, Nguyen Hoang Thinh

Date Received: 11-12-2023 / Date Accepted: 23-05-2024 / Date Published: 12-06-2025
The study was carried out to determine reproductive performance and egg quality of Van Linh chicken from 17 to 40 weeks raised at the Faculty of Animal Science, Vietnam National University of Agriculture. A total of 40 hens and 6 roosters were randomly divided into 2 groups to monitor reproductive performance, feed consumption per ten eggs, egg quality and egg hatching rate. The results showed that Van Linh chickens attained sexual maturity at 120 days of age and the highest of laying egg rate at 193 days of age. In theperiod from 17-40 weeks of age, the egg yield was 66.93 eggs/hen, laying rate was 39.81%, feedconsumption/10 eggs was 3.24kg. The eggs of Van Linh chickens had an average weight of 43.81 g/egg, morphological index of 1.33; Haugh unit was 80.12. The rate of fertile eggs, hatched/fertile eggsand the rate of type I chicks/hatched eggswere 83.17; 86.98 and 90.48% respectively.
DOI: https://doi.org/10.31817/tckhnnvn.2024.22.5.
Influence of Dietary Peptidoglycan and Probiotics Supplementattion on Growth Performance, Feed Utilization,Survivaland Hematological Parameters in Nile Tilapia(Oreochromis niloticus)

Nguyen Thi Mai, Litpaya Nettavongsa, Le Thi Cam Van, Ho Hai Yen

Date Received: 16-03-2023 / Date Accepted: 23-05-2024 / Date Published: 12-06-2025
The present study was conducted to evaluate the effects of dietary co-supplementation of peptidoglycan and probiotics on growth performance, survival, feed utilization, and hematological parameters in Nile tilapia. Commercial feed specialized for tilapia were supplemented with peptidoglycan and probiotics at various concentration (g/kg of diet): 0; 3+3; 5+3; 5+5; 3+5 corresponding to experimental treatments: NT1, NT2, NT3, NT4, NT5. Nile tilapia juveniles were fed on the experimental feed for 4 weeks at a ration of 5% body weight; the feed amount was daily recorded. During the feeding period, fish were weekly weighed to monitor the fish growth. After a 4-week trial, blood samples were collected for hematological analysis; the fish number and weight were used to determine the survival rate and fish growth. Results show that the co-supplementation of probiotics and peptidoglycan induced positive effects on the fish survival, growth, and feed conversion ratio, in which fish fed 3g peptidoglycan + 3g probiotics displayed the best results.
DOI: https://doi.org/10.31817/tckhnnvn.2024.22.5.
Detection of Salmonella typhimuriumCausing Salmonellosisin Layer Ducks Raised in Phung Thuong Commune, Phuc Tho, Hanoi

Truong Ha Thai, Chu Thi Thanh Huong, Vu Thi Thu Tra, Cam Thi Thu Ha, Truong Lan Oanh

Date Received: 15-03-2023 / Date Accepted: 05-01-2024 / Date Published: 12-06-2025
The purpose of this study was to identify Salmonella typhimurium (S.typhimurium), causing salmonellosis in layer ducks farmed in Phung Thuong commune, Phuc Tho, Ha Noi. A total of 32 farm households were selected based on farm-scale and breeding method. Forty-four salmonelosis-suspected ducks were necropsied to monitor gross lessions; of which, 33 ducks had gross lessions of the disease. We collected livers (15 samples), spleens(11 samples), and ovary (7 samples) from 33 ducks with gross lession of the disease, besides, irregular egg yolks (15) were collected for bacteria isolation and then typing by PCRmethod. Results indicated that liver samples had the highest percentage of positive samples (60.0%), followed by spleen (54.5%), ovary (42.9%) and the lowest was the irregular egg yolk sample (40.0%). Twenty-four S.typhimurium strains were isolated and detected by PCR method. Testing the antibiotic sensitivity of the S.typhimurium isolates showed that thesestrains were most susceptible to colistin(100%), followed by doxycycline (79.2%) and gentamicin (70.8%) but moderately sensitvie or resistant to amoxicillin, ampicillinand neomycin.
DOI: https://doi.org/10.31817/tckhnnvn.2024.22.2.
Assessing Influencing Factors and Proposing Solutions to Improve the Results of implementing Land use Planningin Nho Quan District, Ninh Binh Province

Nguyen Dinh Trung, Tran Trong Phuong, Ngo Thi Ha

Date Received: 23-08-2023 / Date Accepted: 05-01-2024 / Date Published: 12-06-2025
This study aims to evaluate the results of implementing land use planning in Nho Quan district, Ninh Binh province. On that basis, groups of solutions were proposed to improve the results of land use planning implementation to meet the socio-economic development goals of the district in the next period. Questionnaire surveys were administered to managers, organizations, and land users followed by interviews. SPSS 20 software was used to analyze, evaluate, and identify factors affecting the results of implementing land use planning. The results showed that there were 6 groups of factors affecting the results of land use planning implementation in Nho Quan district (ranked in order from strong to weak), including: Economic factors (+0.363); Investment environment factors (+0.341); Legal factors (+0.302); Organizational and implementation factors (+0.298); Social factors (+0.287); and other factors (+0.285). Five groups of solutions were proposed to improve the results of land use planning implementation in Nho Quan district, including: Solutions on economic resources for implementing land use planning; Solutions to improve the investment environment; Solutions to ensure legality; Solutions to organize and monitor implementation; and other solutions
DOI: https://doi.org/10.31817/tckhnnvn.2024.22.1.
Land use Management in the New Rural Construction in Tho Xuan District, Thanh Hoa Province

Do Dinh Hieu, Do Thi Tam, Mai Van Phan

Date Received: 13-09-2022 / Date Accepted: 21-10-2022
The study aimed to assess the current situation and propose solutions for effective land use management in new rural construction in the Tho Xuan district. The research used the following methods: primary and secondary survey,evaluation according to Likert's 5-level scale, and assessment according to land use criteria. Using the random sampling method, 100 officers were selected for the survey. Regarding the implementation of land use planning, there were 9/30 land use indicators achieved at a very good level, 5/30 of them were good, 3/30 were at an average level, and 13/30 indicators were poor and very poor. Regarding land use management, 2/12 criteria were evaluated as very good; 7/12 criteria were rated as good; there were 2/12 criteria rated at an average level, and 01 criteria rated at poor level.Some solutions were proposed to improve the efficiency of land use management in new rural construction. To improve the efficiency of land use management, it is necessary to strengthen the unity and coherence of planning; monitor rigidly the implementation of the planning; build a master land database; plan and classify land use projects, strengthen propaganda and dissemination; and increase access to land.
Application of LoRa Technology to Transmit and Receive Signals over Long Distance

Nguyen Van Dieu, Dang Thi Thuy Huyen, Nguyen Viet Anh

Date Received: 17-01-2022 / Date Accepted: 05-07-2022
This paper introduces a sensor network system based on wide area network technology to transmit signals over long distances, saving energy for concentrated agriculture. The system included 3 sensor nodes, 1 data collection station (gateway), and 1 online monitoring system. The system performed serial data transmission for the purpose of transmitting data over longer distances. Besides, the nodes transmitted data to the gateway to send data to the server, which helped users to monitor the system online. The maximum data transmission distance of the system was less than 900m at the test site with no obstructions. In places with many obstacles, the signals transmitted stably below 400m. This sensor network had a “sleep” state when not transmitting data, which saves system energy. The system parameters sent to the server for online monitoring on the Blynk application. These initial results suggest a solution for systems that need long distance transmission in agriculture.
Thiết kế và chế tạo mô hình chuyển động năng thu được từ chuyển độngcủa xe thành điện năng

Nguyen Van Dieu, Ngo Tri Duong, Bui Quoc Huy

Date Received: 14-10-2024 / Date Accepted: 30-05-2022 / Date Published: 29-05-2024
Bài báo này đề xuất một mô hình thu năng lượng động học được lắp đặt dưới gờ giảm tốc để thu năng lượng bị lãng phí do các phương tiện đi qua gờ giảm tốc. Mô hình bao gồm ba phần chính: hệ thống truyền động - bơm - hệ thống lưu trữ, mô-đun máy phát điện, mô-đun điều khiển. Hoạt động như một đầu vào năng lượng, hệ thống truyền động - bơm thu năng lượng động năng để tạo ra khí nén. Sau đó, hệ thống lưu trữ sẽ lưu trữ lượng không khí này để nó sẵn sàng xả khí tới hệ thống máy phát điện. Khi khí nén được xả vào mô-đun máy phát điện, mô-đun này sẽ tạo ra năng lượng điện có thể được sạc cho ắcquy. Mô-đun điều khiển có thể tự động giám sát và điều chỉnh lượng khí nén cũng như năng lượng trong ắcquy. Các thử nghiệm được đưa ra cho thấy hệ thống có khả năng tích trữ một lượng khí nén dưới 50psi. Năng lượng này cho phép tạo ra điện năng một chiều 14,8VDC để nạp vào ắcquy 12VDC. Kết quả ban đầu cho phép tiến hành những nghiên cứu sâu hơn về một nguồn năng lượng mới trong tương lai.
DOI: https://doi.org/10.1234/2c2fdq38
Studies on designing and manufacturing of an automatic monitoring and warning systems for some environmental parameters in shrimp ponds

Dang Thi Thuy Huyen, Nguyen Kim Dung

Date Received: 16-02-2020 / Date Accepted: 06-07-2020
Our research was conducted to design and manufacture an automatic monitoring and warning system for shrimp ponds using three environmental parameters including pH, DO concentration, and salinity. Different from the manual measurement with KIT sets, hand-held meters requires many workers, or automatic monitoring of sensor network with nodes located in each pond often has a high cost, this study proposed the use of a measuring station to remotely monitor the water environment of ponds through an application installed on the smartphone. Water samples of ponds were pumped in turn to the measuring station, where parameters were determined, processed, and sent to the monitoring interface on a smartphone, and at the same time, providing timely warnings to the manager via text messages when these parameters are outside the allowed threshold. This research is not only applicable to the shrimp pond environment but also widely applicable in aquaculture. This is also an open direction in the application of automation in agricultural production. It is also possible to develop a monitoring system, automatic data storage of the pond environment, contributing to making the most effective management plan.
Evaluating Policy Implementation Result of Payment for Forest Environmental Services In Da Bac District ofHoa Binh Province

Mai Quyen, Nguyen Phuong Le

Date Received: 09-11-2019 / Date Accepted: 18-02-2020
Da Bac district, Hoa Binh province has started implementing the PFES policy since 2013. PFES is a mandated payment program from users of forest environmental services (FES) to service providers without using the state budget. Based on secondary and primary information gathered from various stakeholders related to PFES, this paper aims to assess the success and shortcomingsof PFES in Da Bac district.The results show that in2017, the area of forest protected by using PFES money has reached 90,35% of district's forest area; Income of 5.883 households has been increased; People's awareness of forest protection has been improved. However, there are still some difficulties in process of implementing policy, such as low PFES money received by the forest owners; limited propaganda activities; insufficient activities of checking and monitoring quantity and quality of forests after payment. Therefore, the paper suggests that it is essential to support households to increase their income from forests; propaganda activities on the policy should be consecutively encouraged, and a mechanism to check and monitor forest areas and forest quality should be developed...
The Current Production of Ampelopsis cantoniensis(Hook. & Arn.) Planch(Vine Tea)in the Tu Commune,Dong Giang District, Quang Nam Province

Nguyen Ho Lam, Tran Phuong Dong, Pham Viet Tich, Le Hoang, Nguyen Tan Tuan

Date Received: 08-07-2019 / Date Accepted: 29-08-2019
The objective of this study was to clarify the current production, natural conditions, botanical characteristics, cultivation techniques, harvesting, processing, product preservation techniques, and consumption of the vine tea, Ampelopsis cantoniensis,in Tu commune, Dong Giang District, Quang Nam Province. Primary and secondary data were collected, analyzed and evaluated. The results indicated that the vine tea was mainly planted in autumn season from August to October with a density of 20,000 plants per hactare. Six to eight months after cultivation, the vines wereharvested for the first time. The vines can be harvested once a monthwith9-10 months each year, yielding about 6.0 tons of dryvineyields per hectare per year. In order to make thisvine tea become a local major commercial plant, it is necessary to focus on improving the commercial production and processing techniques. In addition, the vine tea production cooperativesof Tu commune and the local government authorities should promote large-scale production, monitor quality, establish a brand name and advertise the product.
Population Dynamics of Javaen Barb(Systomus rubripinnisValenciennes, 1842) along Hau River, Mekong Delta of Vietnam

Au Van Hoa, Tran Van Viet

Date Received: 10-05-2018 / Date Accepted: 05-10-2018
A study on population dynamics of Javaen barb (Systomus rubripinnis)was carried out from January toDecember, 2016 along Hau River in An Giang and Can Tho provinces. Trap fence nets and gill nets were used for monthly fish catch sampling. Fishes were counted and measured for body weight (g) and length (cm) to monitor the temporal and spatial fluctuation on quantity and size. Results showed that the growth rate was high (K = 0.5/year); the survival rate after hatching to fishing size in the wild was low (6.2%); the total mortality was 2.8/year, and the fish was mostly caught at 8-11 cm in body length. The fish of smaller sizes was not affected by fishing gears and larger sizes were rarely found in the wild. The total length of fish could reach 20.5 cm. The breeding of this species occurred the whole year round with the peak in rainy and flooding seasons. Phytoplankton and detritus were the main food of this species. Larger fish was found more abundant upstream.

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