Bandung City is one of the most populous city in Indonesia with the percentage increase of population every year on average of 1.2%. The population density is causing environmental burdens as a buffer source of pollutants will be quite heavy. Detergent is one of the main parameters that is contained in the wastewater of the human population (domestic waste). High rates of detergent usage in community led to high detergent concentrations that are contained in the wastewater so it would be very disruptive to the sustainability of natural environment recovery process. At this time people commonly use detergent type of Llinear Alkyl Sulfonate” (LAS), which is environmentally friendly (easy to decompose in the environment). Detergent concentrations degrade through the processing with stabilization pond system. Specifically detergent degradation in the stabilization pond made through biodegradation by bacteria decomposers detergent.
Purpose of this study is to determine biodegradation detergent on stabilization pond. Degradation process of detergent contents in the wastewater carried through phases those are anaerobic process, facultative process, and maturation process as a whole could degrade levels of detergent by 92.52 %. Concentration of detergent in the domestic wastewater inlet channel by an average of 6.69 mg / l. Detergent concentrations after process by an average of 0.50 mg / l, the percentage of its reduction is 92.52 %. The highest degrade process occurred in facultative pond by an average of 77.57 %. From that degradation then carried out the identification of microorganisms’ that was decomposing detergent in the facultative pond. Microorganism identification made by growth test of medium "minimum salt detergent” (DMS). The results of identification in facultative pond obtained seven types of bacteria decomposers detergent. Those are Xenorhabdus bovienii; Bordetella avium; Aminobacter sp; Kluyvera ascorbata; Acinetobacter sp; Enterobacter sakazaki; Plesiomonas shigelloides.
From these studies it can be concluded that the content of detergents in domestic wastewater can be degraded significantly on biological process with help of certain bacteria that live naturally in the stabilization pond.