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All Journal LIMNOTEK - Perairan Darat Tropis di Indonesia LIMNOTEK
Satya, Awalina
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Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Engineering Environmental Science

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PENYISIHAN NUTRIEN DENGAN KULTUR Eichornia Crassipes DALAM AIR LIMBAH KOLAM IKAN RESIRKULASI SEMI TERTUTUP Satya, Awalina; Chrismadha, Tjandra; Sulawesty, Fachmijany; Yoga, Gunawan P.; Mardiyati, Yayah
LIMNOTEK - Perairan Darat Tropis di Indonesia Vol 21, No 2 (2014)
Publisher : Research Center for Limnology

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Abstract

Air Limbah kolam ikan resirkulasi memiliki karakteristik yang mirip dengan perairan eutrofik sehingga tidak aman untuk dibuang ke perairan umum secara langsung. Pada penelitian ini dilakukan evaluasi kemampuan tiga variasi kepadatan eceng gondok (Eichornia crassipes) untuk memperbaiki kualitas air limbah kolam ikan resirkulasi tersebut. Tujuan penelitian adalah untuk 1) mengungkapkan dinamika kualitas air dalam ?batch culture? 2) kinetika laju reduksi nutrien nitrogenik-fosforik dan konstituen pencemar lainnya, dan 3) efektifitas penyisihan nutrien. Eksperimen terdiri atas empat bak plastik, B1, B2, B3 dan B4. Bak B1 merupakan kontrol, hanya berisi air limbah tanpa eceng gondok. Bak B2, B3 dan B4 berisi eceng gondok dengan kepadatan awalnya berturut-turut adalah 1.618,40 gram/m2; 2.436,51 gram/m2 ; dan 3.243,93 gram/m2. Percobaan dilakukan selama empat hari. Pengukuran pH,Oksigen terlarut (Dissolved Oxygen,DO), konduktifitas, suhu, Total Dissolved Solid (TDS), dan % DO saturation dilakukan tiga kali sehari pada jam 09.00-09.30 ; 12.00-12.30 dan 16.00-16.30, sedangkan Senyawa nutrien nitrogenik (N-NH3+; N-NO2-; N-NO3-, Total Nitrogen (TN)), fosfor (TP), Total Suspended Solid (TSS) dan Total Organic Matter (TOM) dianalisis dua kali sehari pada pagi dan sore hari. Reduksi parameter konduktifitas,TDS, nutrien, nitrogenik, dan fosforik dalam bak-bak yang ditumbuhi eceng gondok mengikuti model kinetika order pertama. Kepadatan eceng gondok ideal adalah 2.436,51 gram/m2 (bak B3) karena menghasilkan pertambahan densitas yang paling tinggi (147,13 gram/m2). Bak berisi eceng gondok paling efektif menyisihkan turbiditas (94,28%-100%), N-nitrit (98,21%-98,93%), TP (92,86%-93,62%), N-nitrat (58,33%-83,33%), TN (59,46%-66,06%), N-ammonia (18.82%-46,88%) dan konduktifitas (16,34%-23,54%). Seluruh perlakuan dan kontrol terbukti tidak efektif untuk menyisihkan material organik.
Effect of Light Intensity on Ammonium Removal and Biomass Growth in Different Levels of Aquaculture Effluent Using Duckweed (Lemna perpusilla) Agus Waluyo; Nirmala, Kukuh; Satya, Awalina; Puji Hastuti, Yuni; Chrismadha, Tjandra; Susanti, Evi; Sumi Lestari, Fajar; Nafisyah, Eva; Sugiarti; Nasrul, Muit
LIMNOTEK Perairan Darat Tropis di Indonesia Vol. 30 No. 2 (2024)
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/limnotek.2024.6420

Abstract

Cultivating duckweed in aquaculture effluent offers a viable approach to eliminating contaminants. The duckweed biomass obtained can be utilized for the generation of bioenergy. However, elevated levels of ammonium (NH4+) in aquaculture effluent, combined with variations in light intensity, can hinder biomass formation. The precise mechanisms underlying this inhibition remain incompletely elucidated. The study assessed the efficacy of duckweed (Lemna perpusilla) as a treatment agent for wastewater from catfish farms. The objective was to evaluate the growth response of duckweed and its efficacy in reducing ammonium levels. The research demonstrated that daily light intensity fluctuated using shade nets and that the ammonium concentration of aquaculture wastewater varied according to the age of the fish. The shade nets, which blocked 25% of the sunlight and had an average daily light intensity of 3433.34–15199.56 lux, demonstrated a slightly elevated NH4+ removal efficiency and duckweed productivity of 69.34% and 0.050 kg/m²/day, respectively. However, these values were not statistically significant when compared to conditions without shade nets, which had a removal efficiency of 63.97% and duckweed productivity of 0.042kg/m2/day (P<0.05). The implementation of shade structures that effectively decrease solar exposure by 25% shows promise for enhancing duckweed productivity and optimizing nutrient reduction in wastewater from fish cultivation systems. This approach contributes to the promotion of sustainable integrated aquaculture.
Co-Authors Agus Waluyo Chrismadha, Tjandra Evi Susanti Gunawan P. Yoga, Gunawan P. Kukuh Nirmala Mardiyati, Yayah Nafisyah, Eva Nasrul, Muit Puji Hastuti, Yuni Sugiarti Sulawesty, Fachmijany Sumi Lestari, Fajar