Xử lý nước thải bằng hệ thống đất ngập nước kiến tạo hay còn gọi là xử lý nước thải bằng hệ thống đất ngập nước nhân tạo. Đây là một hình thức xử lý nước thải dựa vào vùng đầm lầy, than bùn hoặc vùng nước tự nhiên hay nhân tạo, ngập nước thường xuyên hoặc từng thời kỳ, là nước tĩnh, nước chảy, chảy ngọt, nước lợ hay nước mặn, bao gồm cả những vùng biển mà độ sâu mực nước khi thủy triều ở mức thấp nhất không vượt quá 6m.
CONSTRUCTED WETLANDS: An Overview of the Technology Presentation For: Peconic River Remedial Alternatives Workshop December 12 & 13, 2000 Presented by: ROUX ASSOCIATES, INC Environmental Services and Management FILENAME.PPT Walter H Eifert Principal Hydrologist What Is A Constructed Wetland? Definition: A designed and man-made complex of: Saturated Substrates Emergent and Submergent Vegetation Animal Life Water That Simulates Natural Wetlands FILENAME.PPT FILENAME.PPT Present Treatment Applications Municipal and Industrial Wastewaters Acid Mine Drainage Landfill Leachates Agricultural Runoff Urban Stormwater FILENAME.PPT FILENAME.PPT FILENAME.PPT FILENAME.PPT FILENAME.PPT FILENAME.PPT FILENAME.PPT BASF, BASF, Williamsburg Williamsburg FILENAME.PPT BASF, Williamsburg FILENAME.PPT BASF, Williamsburg FILENAME.PPT BASF, BASF, Williamsburg Williamsburg FILENAME.PPT BASF, Williamsburg FILENAME.PPT BASF, Williamsburg FILENAME.PPT BASF, Williamsburg FILENAME.PPT City City of of Glen Glen Cove, Cove, New New York York Stormwater Stormwater Treatment Treatment Constructed Constructed Wetlands Wetlands COCs: TSS, Nitrogen, Lead, and Copper Typical Nitrogen Influent: 4.24 mg/l Projected Nitrogen Removal: 45 lbs/day Treatment Design Flow Rate: Base Flow = cfs First Flush = 25 cfs First Flush Hydraulic Retention Time: 12 Hours Hydraulic Design Flow Rate: 450 cfs Construction Completion Expected: April 2001 FILENAME.PPT 10 ft x ft Culvert LVD LE N E EK 07 E AV Creek ICK DR N HE L I.R R G LE NC O VE AVE G V CO E CR CH AR ST LES RT E ST Twin 12 ft x ft Culverts EN GL TB PRAT FILENAME.PPT 300 FT 10 E RT STUDY STUDY AREA AREA SITE SITE PLAN PLAN Proposed Pedestrian Path PRECONSTRUCTION PRECONSTRUCTION Debris Debris Waste Waste and and Iron Iron Stained Stained Seep Seep Area Area FILENAME.PPT PRECONSTRUCTION PRECONSTRUCTION Severely Severely Eroded Eroded Hillside Hillside FILENAME.PPT UNDER UNDER CONSTRUCTION CONSTRUCTION Stop Stop Log Log Structure Structure and and Diversion Diversion Channel Channel FILENAME.PPT POSTPOST- CONSTRUCTION CONSTRUCTION Completed Completed Micropool Micropool FILENAME.PPT Advantages Advantages of of Constructed Constructed Wetland Wetland Treatment Treatment Systems Systems Inexpensive to construct Very low operation and maintenance costs Easy to maintain Can be designed to provide habitat enhancements and contaminant mitigation Tolerant of fluctuating hydraulic and contaminant loading rates Provide increased educational opportunities FILENAME.PPT Potential Potential Disadvantages Disadvantages of of Constructed Constructed Wetland Wetland Treatment Treatment Systems Systems Require relatively large land areas Lack precise design criteria Potential vector control concerns FILENAME.PPT ... Substrate Substrate Water Water Level Level Hydraulic Gradient Treatment Treatment Media Media (gravel, (gravel, sand, sand, soil) soil) FILENAME.PPT Outflow Outflow Control Control Structure Structure