The Use of Silica Sand as Infiltration of Tripikon Model for Improving Quality of Urban Domestic Waste

New innovation of disposal for fecal waste water infiltration from septic tank by tripikon model is one of efforts in minimizing water pollution. Moreover, this research aimed at analyzing the decrease of BOD level and Coliform on the infiltration of tripikon modification design for domestic waste in urban land area. This research was experimental research by utilizing one group pre and posttest design. Sample of this research was BOD parameter and MPN Coliform for waste water outlet of tripikon modification infiltration, which was 35 samples. Independent variable in this research was tripikon model of waste infiltration from septic tank, meanwhile, the dependent variables were BOD level and coliform. BOD level and MPN Coliform were checked in laboratory. The obtained data would be analyzed by annova. The result of this research showed that it was occurred decrease of BOD level in tripikon infiltration, thus, it was in accordance with Minister of Environment and Forestry Regulation Number 68 in 2016 concerning domestic waste quality standards, which the maximum is in 30 mg / L. As well as MPN Coliform level from infiltration outlet, which was still under maximum level in wastewater (3000 total per 100 ml). Percentage of decrease of BOD level in pipe that was filled by silica sand with the size of 5 meshes and 30 meshes, which were 36.8 % and 17.1 %. Meanwhile, data analysis that utilized Annova showed that there was no significant difference of the decrease of BOD level in tripikon infiltration in pipe that was filled by sand in diameter of 5 meshes and 30 meshes. The use of silica sand as the filter of infiltration could decrease BOD level and coliform. However, it needed to be considered that the use of sand or filtration media with larger diameter was in order to make decomposing microorganism for organic substance able to have oxygen in decomposing process.