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All Journal HAYATI Journal of Biosciences Jurnal Ilmu Lingkungan
Rachminiwati, Nina
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Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences Environmental Science

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A Kinetic Approach for Employing Two Duckweed Species, Lemna minor, and Spirodela polyrhiza, in the Sustainable Aquaculture Wastewater Treatment and Fish Feed Production Rifai, Ridwan Muhamad; Yulistyorini, Anie; Siswahyudi, Dwi; Pratiwi, Jenvia Rista; Fauzi, Ichsan Achmad; Rachminiwati, Nina
HAYATI Journal of Biosciences Vol. 31 No. 6 (2024): November 2024
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.4308/hjb.31.6.1223-1230

Abstract

Duckweed, a widely used natural fish feed, has also become more popular as the phytoremediation agent for wastewater, including one sourced from aquaculture. These two features indicate that duckweed can be utilized in a sustainable aquaculture system by treating and reclaiming nutrients from wastewater and then harvesting them for fish feed production. Hence, this study attempted to assess the approach of the two most known duckweed species, i.e., Lemna minor and Spirodela polyrhiza, in depleting NH4 and PO4 from synthetic controlled aquaculture wastewater as well as to understand their yield based on the N : P ratio. Cultivation in synthetic aquaculture wastewater media was carried out, followed by nutrient uptake and growth analysis. According to statistical analysis, both L. minor and S. polyrhiza could remove NH4 and PO4 with a relatively equal rate (p-val > 0.050). Nonetheless, both duckweed species absorb nitrogen more easily than phosphorous (p-val < 0.050). Considering the yield based on nutrient uptake, NH4 drove a more efficient yield for L. minor to S. polyrhiza at 16.70 g dry biomass/g NH4 and 14.14 g dry biomass/g NH4, respectively. Meanwhile, a higher yield was observed on S. polyrhiza than on L. minor regarding PO4 concentration, at 19.31 g dry biomass/g PO4 and 9.10 g dry biomass/g PO4, respectively. Therefore, a strategy to remove nutrients and produce biomass for fish feed can be formulated based on the N : P concentration ratio, where L. minor tends to produce biomass more rapidly in a higher N : P ratio, whereas S. polyrhiza works in the opposite.
Reduksi Nitrogen dan Fosfor dari Air Limbah Budidaya Perikanan menggunakan Free-Water Surface Constructed Wetlands dengan Lemna minor Mufida, Ummi Afifatul; Rifai, Ridwan Muhamad; Fauzi, Ichsan Achmad; Rachminiwati, Nina; Yulistyorini, Anie
Jurnal Ilmu Lingkungan Vol 23, No 4 (2025): July 2025
Publisher : School of Postgraduate Studies, Diponegoro Univer

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jil.23.4.907-914

Abstract

Semakin banyaknya pembangunan di Indonesia termasuk fasilitas industri perikanan memberikan dampak pada kondisi lingkungan. Fasilitas industri perikanan di Kota Malang saat ini belum memiliki sistem pengolahan air limbah. Faktanya air limbah budidaya ikan yang dihasilkan dapat mencemari air permukaan. Polutan (Nitrogen dan Fosfor) yang terdapat pada air limbah budidaya ikan baik hasil dari sisa metabolisme maupun sisa pakan ikan dapat menyebabkan eutrofikasi. Penelitian ini bertujuan untuk menganalisa reduksi konsentrasi polutan (Nitrogen dan Fosfor) pada air limbah budidaya perikanan dengan menggunakan tanaman air Lemna minor menggunakan sistem Free-Water Surface Flow Constructed Wetlands (FWS CW). FWS CW yang digunakan dalam penelitian ini mempunyai dimensi tinggi 0,4 m, panjang 2 m dan lebar 1 m. Debit air limbah budidaya ikan yang dialirkan menggunakan dua macam Hydraulic Retention Time (HRT), yaitu 14 jam dan 7 jam. FWS CW dengan HRT 14 jam dengan debit inlet 15,14 mL/s dapat menurunkan konsentrasi amonium, nitrat dan fosfat dengan tingkat efisiensi 50,09%; 28,11%; dan 72,37%. Sedangkan FWS CW dengan HRT 7 jam dan debit inlet 30,28 mL/s dapat menurunkan konsentrasi amonium, nitrat dan fosfat dengan tingkat efisiensi 38,93%; 23,91%; dan 88,28%. Dapat disimpulkan bahwa FWS CW dengan HRT 14 jam lebih efisien untuk mereduksi nitrogen, sedangkan FWS CW dengan HRT 7 jam lebih efisien untuk mereduksi fosfor.
Co-Authors Anie Yulistyorini Ichsan Achmad Fauzi Jenvia Rista Pratiwi Mufida, Ummi Afifatul Ridwan Muhamad Rifai Siswahyudi, Dwi