LAKE WATER TREATMENT OF PADENGAN PLOSO VILLAGE, LAMONGAN DISTRICT WITH FILTRATION AND ADSORPTION PROCESSIRVANDY ANDRIANSYAH, MOHAMMAD RAZIF AND MARITHA NILAM KUSUMA
The inhabitants of Pedengan Ploso Village, Lamongan Regency currently still use lake water that does not meet the requirements of clean water, especially for turbidity parameters. In this village,there are enough coconut trees whose shells are not used optimally. This study used adsorbent media of coconut shell charcoal by a batch and continuous process. To obtain optimal results of turbidity allowance, the filtration process was conducted using sand, which is also available quitea lot in this village. Then, the water adsorption process was carried out. In the batch process, size variations of the adsorbent used were: mesh of 8, 10, 20 and the adsorbent dose of 50 g/ 500 mL, 75g/500 mL, 100 g/500 mL. The adsorption ability of batch process was measured from the value of x/m using Freundlich, Langmuir, and BET isotherms. In the continuous process, variations in media column height used were 7 cm, 14 cm,and 21 cm. The adsorption ability of continuous process was measured by the kinetics constant (k1) and adsorption capacity (qo). From the results of the batch research, the maximum turbidity removal efficiency was 43.75% in the mesh of 10. From the results of continuous research, the maximum turbidity removal efficiency of 96.57% in the mesh of 10 and column height of 21 cm with kinetic constants value of k1 = 5.2474 lt / mg.hour and qo = 3.411 x 10-7 mg adsorbate/mg adsorbent.