Background & Objective: Phytoremediation is an economically, environmentally, and scientifically efficient technique suitable for developing countries, and it is a worthwhile business. One of the special plants for remediation of these effluents is the vetiver plant. The purpose of this study was to determine the effectiveness of vetiver plant with hydroponic culture to remove the LAS wastewater from the hospital's laundry.Materials and methods: This was a descriptive-analytical study. Sampling was carried out using special sampling containers for hospital laundry wastewater. In this study, the concentration of LAS parameter was measured. The concentration of anionic surfactants was measured with methylene blue active substances or MBAS method. All sampling conditions and other tests were performed according to the guidelines of the book standard method. After various tests, the obtained results were analyzed using Statistical software Excel and SPSS; the average values for each parameter were calculated, compared to the standard efficiency of the remediation process, and plotted on the corresponding graphs.Results: In this study, the root efficacy of vetiver plant in treatment of hospital laundry wastewater was investigated. The highest removal efficiency of LAS in the pilot of vetiver hydroponics culture with 0.5, 1.5, 2, 5, 10, and 20 mg/L concentrations of the hospital laundry wastewater in two days was 70, 80, 72, 60, 50, and 40 percent, respectively. The concentration of LAS in the laundry room varied from 10 to 40 mg/L.Conclusion: The overall results show that the efficiency of this method in degradation and reduction of LAS of the wastewater of hospital laundry has been decreased with increase in surfactant concentration. Increase of the concentration of surfactants resulted in reduction of oxygen levels, as well as reduction in activity of bacteria and their destruction, and reduced the effectiveness of vetiver plant in LAS treatment.
