(PPT) Các Giải Pháp Xử Lý Nền đất Yếu Hay Dùng ở Việt Nam. Pptx

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Application of constructed wetlands using Vetiveria zizanioides and Phragmites australis in the landfill leachate treatmentLe Nguyen

Science and Technology Development Journal - Natural Sciences, 2019

Constructed wetlands have been widely applied for removing pollutants in the leachate recently. In this study, constructed wetland system combined vertical flow and horizontal flow, using Vetiveria zizanioides L. and Phragmites australis, was set in a laboratory scale to assess the leachate treatment ability. The landfill leachate was added to the system with increasing concentration to evaluate the treatment ability by the time. The results showed that the removal efficiency reached the highest when the COD concentration was 575 mg/L, including BOD5 (96.48%), COD (83.24%), total nitrogen (91.43%), total phosphorus (77.84%), ammonia nitrogen (86.47%), and color (87.91%). Furthermore, the treated effluent quality reached the class A of the Vietnamese standard on industrial wastewater quality. Beside, when physicochemically treated leachate (coagulation – flocculation) (COD concentration was 1255.50 mg/L), was added to the system, the removing efficiencies remained stable by the time,...

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