Tuan Van Le

Tuan Van Le
Hue University · Environmental Science

Dr.Eng

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26
Publications
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104
Citations

Publications

Publications (26)
Article
Mục đích của nghiên cứu này nhằm đánh giá hiệu quả của hệ thống kết hợp than sinh học (biochar) và hồ sinh học bèo tây (Eichhornia crassipes) trong việc xử lý nước thải chăn nuôi lợn sau hầm biogas. Kết quả nghiên cứu thực nghiệm cho thấy nước thải đầu ra đạt quy chuẩn cho phép sau 7 giờ xử lý bằng hệ thống xử lý kết hợp. Độ pH của nước thải luôn ổ...
Article
Full-text available
Ascertaining peak oxygen demand is crucial for plant designers to determine blower capacities of wastewater treatment plants in planning phase. To obtain this technical information without cumbersome influent sampling and analysis, a set of field-test activated sludge reactors equipped with DO and nitrate-N sensors was installed at 3 sites and cont...
Article
Full-text available
This work presents batch mode experiments of combination ultrasonic wave (USW) and H2O2 in pre-treatment of landfill leachate. Additionally, in continuous mode experiments, a modified aerated bio-filter (ABF) was designed for the treatment of synthetic wastewater and the leachate (after treatment by USW/H2O2), with the stepwise increasing the volum...
Article
Công nghệ khử trùng nước không tạo ra các sản phẩm phụ độc hại ngày càng thu hút nhiều quan tâm nghiên cứu trong những năm gần đây. Nghiên cứu này trình bày kết quả khử trùng Escherichia coli trong nước bằng tia UV kết hợp với thiết bị tạo màng chất lỏng (LFFA). Sự nhạy cảm của vi khuẩn với sự khử trùng bằng UV hoặc UV/LFFA được xác định tại các đi...
Article
Full-text available
This study presents results for the use of UV radiation and a liquid-film-forming device (LFFD) for disinfection of water. Escherichia coli was used as a model microorganism for examining the bactericidal performance of UV. Bacterial inactivation was conducted in a LFFD with various condition of UV dosages, air flow rates, and initial bacterial con...
Article
Full-text available
This study presents results for the use of UV radiation and a liquid-film-forming device (LFFD) for disinfection of water. Escherichia coli was used as a model microorganism for examining the bactericidal performance of UV. Bacterial inactivation was conducted in a disinfection apparatus with various conditions of UV dosages, air flow rates, and in...
Article
Full-text available
Sewage generated in Southeast Asia is typically characterized by small per-capita flow and low concentration. This study investigated the impacts of exfiltration (leaking-out) and infiltration (leaking-in) on sewage flow and quality in Hue, Vietnam. Sewage flow and quality were continuously monitored at the sewer outlet of a residential drainage ar...
Article
Mangrove ecosystems in central Vietnam play an important role in protecting the coast line; reducing erosion and salinization; as well as regulating climate. Mangrove ecosystems in Cu Lao Cham-Hoi An Biosphere Reserve contribute significantly to the role of coastal protection, climate change resilience, and local economic development. Historical sa...
Article
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The study was aimed at developing an alternative method to catch biodegradable concentrations in municipal wastewater, especially for designing wastewater treatment plants receiving storm water where the influent concentrations significantly changed in time. As conventional water analytical methods required lots of samples and numerous analysis, wh...
Article
Full-text available
Heat and humic acid modified sludge (MS) from drinking water treatment plant (DWTP) is used as an adsorbent for removal of phosphate (P) from aqueous solution. The MS was characterized by XRD and SEM observation. The effects of pH, adsorbent dosage, initial P concentration, and exposure time on the P removal were studied. Under identical treatment...
Article
Full-text available
This work presents the results of adding H2O2 into a modified aerated biofilter (ABF) for treatment of refractory organic constituents in wastewater. The activated sludge, taken from wastewater treatment system of Hue Beer Company, was long-time cultured in laboratory with beef extract-peptone solution. The synthetic wastewater was prepared from so...
Article
Full-text available
Conventional wastewater analysis based on on-site sampling holds a limitation of accuracy because of fluctuation of influent composition in time and its corruptible nature in organics. To cope with the problem, this study aimed at developing an alternative method using on-site lab-scale activated sludge reactors, where a set of mean influent materi...
Article
This study investigated the effect of combined treatments using pressurized carbon dioxide (PCD) and sodium hypochlorite (NaOCl) on the inactivation of Enterococcus sp. in artificial seawater. Bacterial inactivation was conducted in a liquid-film-forming apparatus with various pressure conditions, CO2 supply rates, and chlorine dosages. Combined PC...
Article
Interest is growing in a disinfection technique for water treatment without disinfection byproducts. This study presents the result of using a liquid-film-forming apparatus at less than 1.0 MPa for disinfection of seawater. The sensitivity of Enterococcus sp. (ATCC 202155) to the pressurized carbon dioxide (CO2) was examined under various condition...
Article
Ship ballast water should be disinfected before being discharged into the ocean to avoid the dispersal of non-native species into the marine environment. This study presents the results of using pressurized carbon dioxide (CO2) at less than 1.0 MPa for inactivating Escherichia coli and Enterococcus sp. in artificial seawater (3.4% salinity). The ba...
Article
In the palm oil mill effluent (POME) discharged during the production process of palm oil, oil is contained in the emulsion state. Currently, the open ponding system (facultative/anaerobic lagoons) is being applied as the main treatment method for POME owing to low operating costs. However, the main disadvantages of this system are the requirement...
Article
Full-text available
The main objective of this research was to evaluate the effectiveness of using H2O2 with the aerobic biological treatment in order to increase benefit of H2O2 and overcome its inhibition to microorganisms. Here, the activated sludge was taken from wastewater treatment system of Hue Beer Company and was cultured long-term in laboratory by beef extra...
Article
The control of nutrients in wastewater flows plays an important role to prevent eutrophication of receiving waters and to recover the nutrients. This study has been carried out on the 05 sources of wastewater containing nitrogen and phosphorus in Hue city, including: households, hotels, restaurants, hospitals and markets. The analysis of wastewater...
Article
Full-text available
Wastewater may contain high levels of the nutrients: nitrogen and phosphorus. Excessive release of nutrients to the environment can cause severe environmental problem such as eutrophication leading to algal blooms, oxygen deficiency, and fish kills. The forward osmosis (FO) could be a choice of treatment. FO process presents the results of using fo...
Article
A modified column flotation of using tiny microbubbles ozonation (MB, diameter range: 1–16 μm, D32 = 6.59 μm) enhanced by coarse bubbles (CB, diameter range: 0.5–5 mm) was designed for the treatment of fine oil-in-water emulsions (EO, d < 16 μm, D32 = 6.3 μm) and humic acid (HA) mixture (EO/HA, d < 16 μm, D32 = 5.8 μm). Samples of EO/HA showed much...
Article
Irrigation water and recycled water used for farm gardens can be a potential source of contamination of microbial pathogens that cause harmful illness. This study investigated the use of pressurized carbon dioxide to inhibit pathogens in water sources. An apparatus producing microbubbles was operated with pressure up to 0.7 MPa, room temperature an...
Article
Full-text available
This study investigated the potential application of pressurized CO2 for water disinfection. Under supporting high pressure, a high volume of CO2 microbubbles were produced in a liquid environment. Specifically, the inactivation effects of CO2 against Escherichia coli, bacteriophage MS2 and T4 were examined at equal pressures (0.3 - 0.9 MPa) and te...
Conference Paper
Full-text available
Irrigation water and recycled water used for farm gardens can be a potential source of contamination of microbial pathogens that cause harmful illness. This study investigated the use of pressurized carbon dioxide to inhibit pathogens in water sources. An apparatus producing microbubbles was operated with pressure up to 0.7 MPa, room temperature an...
Article
Based on the production of gas bubbles with the support of a liquid film-forming apparatus, a device inducing contact between gas and water was used to inactivate pathogens for water disinfection. In this study, the inactivation effect of CO2 against Escherichia coli was investigated and compared with the effects of N2O and N2 under the same pressu...
Article
This study examined the efficiencies of microbubble (MB) treatment, MB treatment with polyaluminium chloride (PAC) as a coagulant, and MB treatment with cetyltrimethylammonium chloride (CTAC) as a cationic surfactant in the separation of emulsified oil (EO) by modified column flotation. Batch mode experiments were conducted by synthesizing emulsifi...

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