Document Type: Research Paper
Department of Chemistry, College of Natural Sciences, Jimma University, P. O. Box 378, Jimma, Ethiopia.
Department of Environmental Health Sciences and Technology, Public Health Faculty, Institute of Health Sciences, Jimma University, Jimma, Ethiopia
The study presented in this article investigated the removal of a long chain anionic surfactant from residential laundry wastewater using Jackfruit (Artocarpus heterophyllus) seeds. The main ingredients of laundry wastewater are the surfactants. Therefore, great attention should be given on the treatment and disposal of laundry wastewater. The use of natural substitutes in treating waste water has no harmful effects and it is considered an effective step towards protecting the environment and promotes sustainability. Jar test experiments were conducted in order to determine the optimum conditions for the removal of surfactants, chemical oxygen demand (COD), biological oxygen demand (BOD) and turbidity in terms of effective dosage, and pH control. At the optimum initial pH value of 6, optimum dose of 2.5 g/L, and optimum mixing time of 25 minutes the surfactant, COD, BOD and turbidity removal efficiencies were 91.66%, 82.86%, 77.66% and 85.14%, respectively. It can be concluded that Artocarpus heterophyllus seed powder was a feasible and cost effective natural coagulant for the removal of anionic surfactant from laundry waste water. Results showed that the pseudo second order equation is the suitable model for this system.