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Nghiên cứu sử dụng cây sậy (Phragmites australis) và cây rau muống (Ipomoea aquatica) trong xử lý nước thải chăn nuôi lợn sau biogas bằng bãi lọc trồng cây nhân tạo

Nghiên cứu trình bày kết quả sử dụng cây sậy (Phragmites australis) và rau muống (Ipomoea aquatica) trong công nghệ đất ngập nước nhân tạo để xử lý nước thải chăn nuôi lợn sau biogas. Kết quả ánh giá cho thấy hai loài thực vật này có khả năng chống chịu với nước thải chăn nuôi lợn sau biogas. | TAP CHI SINH HOC 2019 41 2se1 amp 2se2 327 335 DOI 10.15625 0866-7160 v41n2se1 amp 2se2.14184 STUDY ON USING REED Phragmites australis AND WATER SPINACH Ipomoea aquatica FOR PIGGERY WASTEWATER TREATMENT AFTER BIOGAS PROCESS BY CONSTRUCTED WETLAND Bui Thi Kim Anh1 Nguyen Van Thanh1 Pham Thuong Giang2 Dang Dinh Kim1 1 Institute of Environmental Technology VAST Vietnam 2 Thai Nguyen University Thai Nguyen Viet Nam Received 12 August 2019 accepted 28 September 2019 ABSTRACT This research aims to evaluate the capacity of two plants Phragmites australis reed and Ipomoea aquatica water spinach in the constructed wetland to treat the piggery wastewater after biogas process. The results showed that both plants are tolerant to the piggery wastewater. Ph. australis well grew in condition with pH 5 9 COD 750 1000 mg l and NH4 250 mg l while those for I. aquatica were pH 6 8 COD up to 750 mg l and NH4 100 mg l. The removal efficiency of TSS COD total N total P NH4 by Ph. australis were 84.6 80.1 71.9 53.5 and 75.7 meanwhile by I. aquatica were 81 62 8 60.5 60.4 and 63.7 respectively. It suggests that Ph. australis could have higher removal rate than I. aquatica. The quality of treated wastewater met the permitted standard QCVN62-MT 2016 BTNMT column B in all experiments indicating that it is possible to use these two plants in the constructed wetland for piggery wastewater treatment. Keywords Ipomoea aquatic Phragmites australis constructed wetland piggery wastewater. Citation Bui Thi Kim Anh Nguyen Van Thanh Pham Thuong Giang Dang Dinh Kim 2019. Study on using reed Phragmites australis and water spinach Ipomoea aquatica for piggery wastewater treatment after biogas process by constructed wetland. Tap chi Sinh hoc 41 2se1 amp 2se2 327 335. https doi.org 10.15625 0866- 7160 v41n2se1 amp 2se2.14184. Corresponding author email buianh7811@gmail.com 2019 Vietnam Academy of Science and Technology VAST 327 TAP CHI SINH HOC 2019 41 2se1 amp 2se2 327 335 DOI 10.15625 0866-7160 v41n2se1