TAILIEUCHUNG - Design of wetland system for wastewater quality improvement at formosa Ha Tinh steel company

The study team has run the 500 m2 pilot wetland aiming to figure out optimum design parameters such as: balancing requirements of hydraulic conductivity, hydraulic headloss, filtration efficiency and plant growth. | Vietnam Journal of Science and Technology 56 (2C) (2018) 165-171 DESIGN OF WETLAND SYSTEM FOR WASTEWATER QUALITY IMPROVEMENT AT FORMOSA HA TINH STEEL COMPANY Viet-Anh Nguyen1, *, Anh Thi Kim Bui2, Giang Ngo Hoang1 1 Institute of Environmental Science and Engineering, Hanoi University of Civil Engineering, 55 Giai Phong, Ha Noi 2 Institute of Environmental Technology, VAST, 18 Hoang Quoc Viet, Ha Noi * Email: anhnv@ Received: 10 May 2018; Accepted for publication: 22 August 2018 ABSTRACT After a marine life disaster in central Viet Nam in 2016 due to poorly treated steel industry wastewater and pipe cleaning solutions, the Formosa Steel Corporation has been improved their wastewater treatment systems. Besides, an effluent polishing and buffer pond – wetland system has to be built. The study team has run the 500 m2 pilot wetland aiming to figure out optimum design parameters such as: balancing requirements of hydraulic conductivity, hydraulic headloss, filtration efficiency and plant growth. The pilot wetland was filled with different kind of lime stone, peanut gravel and sand, running with flow rate m3/h. The pilot test results have provided appropriate design parameters for the ha Formosa wetland: Subsurface flow constructed wetland cells CB1, CB2, CB3 placed in series, with maximum horizontal flow rate 122 m3/h, unit hydraulic headloss , followed by free water surface flow wetland cell CB4. The main filtration media selected for wetland cells CB1, 2, 3 was lime stone with diameter 50-100 mm (60 cm depth), where supporting layers for plant vegetation were coarse sand (20cm depth) and peanut gravel of 5-10 mm diameter (10 cm depth). The full scale 10 ha pond-wetland system now is in operation, proving design configurations of the team. Keywords: constructed wetland, filter media, headloss, hydraulic conductivity. 1. INTRODUCTION Constructed wetland (CW) is eco-friendly technology that utilizes aquatic plants for wastewater .

• Hoá học
• Vietnam Journal of Science and Technology
• Design of wetland system
• Wastewater quality improvement at formosa
• Ha Tinh steel company
• Proving design configurations
• Journal of Science
• Journal of Technology
• Technology Management
• Science and Technology
• International integration
• Journal of Marine Science and Technology
• Present state of ocean observations and service in Vietnam
• Unmanned Aerial Vehicle
• The Vietnam Academy of Science and Technology
• Ministry of Natural Resources and Environment
• Research Organizations
• Policy Planning
• Science and Technology development
• Theory Z
• Human Resources
• Development policy of Japan
• Technology and innovation system
• STI system
• Universities of Vietnam
• Model of Scientific Research
• Social Science Research System
• Nucleotide diversity of 15 conifer species in Vietnam’ s central highland
• Highland of Vietnam
• 15 conifer species
• Species of conifers
• Journal of Vietnam Agricultural Science and Technology
• Tạp chí Khoa học Công nghệ Nông nghiệp Việt Nam
• Agro food value chain
• Trade policy Vietnam
• Vietnam’s agricultural export
• The agricultural market
• The improved upland rice technology (IURT)
• Contract farming
• Improved technology
• Ssubsequent effect
• Application of passive remote sensin
• Upward looking microwave radiometers
• Technology Institute Vietnam Academy
• Trees canopyusing ground based
• Close innovation
• Open innovation
• Technological innovation
• Mechanical engineering
• R&D Organization
• Research activity
• Modeling studies of Vietnam lemongrass essential oil extraction process
• Lemongrass essential oil
• Response surface methodology
• Box Behnken design
• Kinetics of pyrolysis reaction
• Agricultural residues in Vietnam
• Corn cob and sugarcane bagasse
• Pyrolysis or gasification
• A hopane triterpenoid
• The mycelium of isaria japonica in Vietnam
• NMR assignment for 11β
• 22 dihydroxyhopane
• Spectral data analysis
• Seawater desalination applications in Vietnam
• Potential and challenges
• Current seawater desalination plants
• The MD process including configurations
• Characteristics of elemental and organic carbon
• Different sampling locations in vietnam
• NPs in the atmosphere
• Journal of Science and Technology
• Antibiotics and pesticides in water and sediments
• Intensive shrimp farms in southern Vietnam
• Mekong Delta Vietnam
• Arge amount of antibiotics
• Chemical constituents and biological activities
• Alpinia kwangsiensis collected in Vietnam
• Methanol extract of Alpinia kwangsiensis roots
• Staphylococcus aureus and Bacillus subtilis
• Wave characteristics in east Vietnam sea
• WAM cycle 4
• East Vietnam Sea
• Wave field Typhoon
• Using benthos to evaluate the quality
• The incident caused by formosa
• The central Vietnam
• The fungal strain FBV40
• Purification and characterization of laccase involved
• The white rot fungus isolated
• Bavi forest of Vietnam
• Study of sudden ionospheric disturbances
• Low frequency receiver
• Nha Trang province
• The sudden ionospheric disturbance
• Preliminary assessment of Btex
• Indoor and outdoor air
• Residential homes in Hanoi
• Among BTEX compounds