tailieunhanh - The use of water spinach (Ipomoea aquatica) in domestic wastewater treatment

The main objective of this study was to examine the efficacy and capacity of using hydroponic systems in municipal pollutant removal at household scale. Three pilot scaled hydroponic systems [dimension for each system: m (L) x Φ 114 mm] were installed to investigate the optimal age of vegetable, planting density and retention time for household wastewater treatment, respectively. | 49 Nong Lam University, Ho Chi Minh City The use of water spinach (Ipomoea aquatica) in domestic wastewater treatment Nguyen Vu Duc Thinh, Huynh Ngoc Thu Huong, Nguyen Nhat Huynh Mai and Ngo Vy Thao Nong Lam University, Ho Chi Minh City, Vietnam ARTICLE INFO ABSTRACT Research Paper The main objective of this study was to examine the efficacy and capacity of using hydroponic systems in municipal pollutant removal Recieved: June 23, 2018 at household scale. Three pilot scaled hydroponic systems [dimension Accepted: December 03, 2018 for each system: m (L) x Φ 114 mm] were installed to investigate the optimal age of vegetable, planting density and retention time for household wastewater treatment, respectively. Water spinach (Ipomoea aquatica) planted in 27 plastic cups throughout and 114mm-diameter uPVC pipes filled with wastewater was employed as the Keywords treating agent of pollutants. The averaged influent contained proximately mg L−1 suspended solids (SS), mg L−1 biological oxyDomestic wastewater gen demand (BOD5 ), mg L−1 chemical oxygen demand (COD), Household −1 −1 26 mg L−1 NH+ NO− PO3− at pH . 4 , mg L 3 , and mg L 4 Hydroponics Results showed that a designed system consisting of 10 plants of 15-dayWastewater treatment old water spinach pre-planted in baked clay in each cup was capable Water spinach of treating 30 L of domestic wastewater meeting the current municipal wastewater discharge standards in Vietnam (column A standards of QCVN 14:2008/BTNMT) after 4 days of wastewater retention time. If operated under conditions of the above parameters, the pilot-plant hydroponic system can achieve the removal of 65% SS, 82% BOD5 , 74% Corresponding author − 3− COD, 90% NH+ 4 , 30% NO3 and 86% PO4 . The result of this study has provided an applicable domestic wastewater treatment system ecoNguyen Vu Duc Thinh friendly and suitable for small and medium household areas. Email: 1. .

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