Laundry Wastewater Treatment by Phytoremediation Utilized Polyculture System of Water Lettuce ( Pistia stratiotes  L.) and Giant Salvinia ( Salvinia molesta )

Laila Mukarromah; Fathur Fikran Qalam; Nurul Hidayat Aprilita; Suherman Suherman

doi:10.22146/ijc.102188

Laundry Wastewater Treatment by Phytoremediation Utilized Polyculture System of Water Lettuce (Pistia stratiotes L.) and Giant Salvinia (Salvinia molesta)

https://doi.org/10.22146/ijc.102188

Laila Mukarromah⁽¹⁾, Fathur Fikran Qalam⁽²⁾, Nurul Hidayat Aprilita⁽³⁾, Suherman Suherman^(4*)

(1) Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Sekip Utara, Yogyakarta 55281, Indonesia
(2) Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Sekip Utara, Yogyakarta 55281, Indonesia
(3) Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Sekip Utara, Yogyakarta 55281, Indonesia
(4) Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Sekip Utara, Yogyakarta 55281, Indonesia
(*) Corresponding Author

Abstract

The wastewater from laundry contains detergents with various types of substances including surfactants, builders, bleaching agents, and other additives. Phytoremediation using the water lettuce plant (Pistia stratiotes) and giant salvinia (Salvinia molesta) is an effort to mitigate pollution caused by laundry wastewater. The preliminary test involves wastewater concentrations of 0, 15, 30, 45, and 60% with 150 g of water lettuce and giant salvinia observed over a period of 4 d. Phytoremediation testing involved wastewater concentration of 15% with water lettuce and giant salvinia ratios of 100:0; 75:25; 50:50; 25:75; and 0:100 observed over a period of 15 d. The analyses are conducted by volumetric, gravimetric, and spectrophotometric methods. The optimal contact time for reducing pollutant levels is 15 d within the polyculture system consisting of 50 g of water lettuce and 100 g of giant salvinia. First-order kinetics provide suitable results in reducing COD, phosphate, and TSS in both monoculture and polyculture systems with R² > 0.80, and rate constants k > 0.0284 ((mg/L) d). In conclusion, the polyculture system demonstrated better reduction effectiveness than the monoculture system, although the performance difference is insignificant. These results implied for better option in managing wastewater laundry activities.

Keywords

Pistia stratiotes; giant salvinia; laundry wastewater; phytoremediation; polyculture

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DOI: https://doi.org/10.22146/ijc.102188