THE INFLUENCE OF THE THICKNESS OF SAND MEDIA AND THE DENSITY OF TYPHA ANGUSTIFOLIA L PLANT AGAINST THE REMOVAL OF COD CONTENT OF WASTE LEACHATE POLLUTANTS ON CONSTRUCTED WETLANDS
Sugeng Nuradji1 , Sutrisno Anggoro2, Henna Rya Abdurachim3 and Boedi Hendrarto4
*Doctoral Program in Environmental Sciences of Diponegoro University Semarang
1 Health Polytechnic-Ministry of Health Palu, Central Sulawesi, Indonesia
2Doctoral Study Program in Coastal Resources Management of Diponegoro University Semarang
3Medical Faculty, Diponegoro University Semarang
4Fisheries and Marine Sciences Faculty of Diponegoro University Semarang
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ABSTRACT
One of the efforts to reduce the negative impact of leachate waste in the environment uses adaptive plants with waste in constructed wetlands (CWs), because the method does not require high operating costs and environmentally friendly.The purpose of this study is to examine the influence of the thickness of sand media and the density of Typha angustifolia L against the COD content of waste leachate pollutants removal efficiency in CWs. This research method uses a split plot design at laboratory scale. A statistical test uses linear additive of variance analysis for a randomized group with two factors and one dependent variable. The results of the study of the average influent COD content at the level of between 495.5 mg/L to 598.56 mg/L after experiencing sequential time (7, 9, 11 and 13) days in CWs decrease to 21.83 mg/L to 68.74 mg/L. There is not a significantly (p = 0.158 > 0.05) influence the thickness of sand media to the COD removal. The COD removal efficiency is significantly (p = 0.00 < 0.05) influenced by the density of Typha angustifolia L plant. The highest removal efficiency is selected on density 36 plants/m2, occurring in the thickness of sand media of 55 cm with the removal at the level of between 88.99 % to 95.96 %.
Keywords: constructed wetlands, leachate, COD, sand media, T.angustifolia L.