Abstract
In Indonesia surface water is often polluted by domestic waste causing degradation of riverwater quality. The use of activated Effective Microorganism Solution (EMS) mixed with rice bran or wheatbran, as well as soil and shaped into mudballs has in recent years shown promise as a direct method toimprove quality of polluted river water. This study examined the effect of temperature on removal of CODand TSS by mudballs made from activated EM4 solution, rice bran and clay soil. Batch experiments treatingartificial river water by the mudballs were conducted at temperatures 25oC and 30oC with the artificial riverwater having initial levels of 120 mg/L COD and 100 mg/L TSS. Efficiency removals of COD by 2.5 cm mudballs at 25oC and 30C were 66.7% and 59.4%, whereas that of TSS were 100% and 99.7% respectively.TSS sorption by the mudballs appears to better fit the Langmuir than the Freundlich isotherm models. At25oC and 30C, maximum sorption (Qm) of TSS is 6.89 mg/g and 7.52 mg/g; Langmuir constant (KL) is0.0196 L/mg and 0.0168 L/mg, while equilibrium parameter (RL) is 0.338 and 0.373 respectively. Statisticalhypothesis testing of the experimental data suggests that at =0.05, temperature affects removal efficiencyof COD but not that of TSS.
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