ABSTRACT

Textile industry is one of the biggest pollutants of Citarum River, a very strategic river in Indonesia. This study aims to find an alternative to improving the river’s water quality by the combined system of geotextile, activated carbon, Hibiscus sabdariffa seeds, and clinoptilolite. Their role is to separate water from solid waste and chemical waste, especially heavy metal. The water sample used is water modified to replicate the actual Citarum River’s water quality which has been contaminated by adding sewer water, soil, and textile coloring agent. This synthetic sample is driven to the combined filtration unit by the order of geotextile, Hibiscus sabdariffa, and clinoptilolite. The post-treatment synthetic sample is examined in the laboratory referring to the SNI 6989-8:2009 on Water and Wastewater. The test reveals promising results as the filter system reduces the amount of contamination below the thresholds determined by various standards. With further research, these materials can potentially be implemented as an alternative in combating effluent contamination.