Efektivitas Free Floating Wetland Tanaman Kiambang (Salvinia Molesta) Dengan Penambahan EM4 Dalam Pengolahan Limbah Laundry Pada Kondisi Anoxic–Oxic

Icha Ayoe Bilbina; Mohamad Mirwan

Authors

Icha Ayoe Bilbina Universitas Pembangunan Nasional Veteran Jawa Timur Author
Mohamad Mirwan Universitas Pembangunan Nasional Veteran Jawa Timur Author

Keywords:

COD, DO, EM4, Free Floating Wetland, Kiambang, Limbah Laundry, Surfaktan

Abstract

Laundry wastewater contains organic matter and detergents that have the potential to pollute the environment if not properly treated. One environmentally friendly method to address this problem is the free floating wetland (FFW) system, which utilizes aquatic plants and microorganisms. This study aimed to evaluate the effectiveness of water lettuce (Salvinia molesta) combined with 5% Effective Microorganisms 4 (EM4) in reducing Chemical Oxygen Demand (COD) and surfactants, as well as increasing Dissolved Oxygen (DO) levels in laundry wastewater. The experimental design consisted of two treatments: FFW with and without EM4 addition, over a 5-day retention time divided into an anoxic phase (day 0 to day 2) and an oxic phase (day 3 to day 5). The results showed that the combination of water lettuce and 5% EM4 was able to reduce COD by up to 80.9% and surfactants by 65%, while increasing DO to 5.02 mg/L. This success is attributed to the root system of the water lettuce, which enhances oxygenation in the rhizosphere zone, thus supporting the growth and activity of aerobic microorganisms. FFW based on water lettuce with EM4 addition has the potential to be an effective, sustainable, and environmentally friendly laundry wastewater treatment technology.

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