Electronic Theses and Dissertation

Produksi minyak kelapa sawit yang tinggi di indonesia menghasilkan limbah cair (palm oil mill effluent) dalam jumlah besar yang berpotensi mencemari lingkungan. salah satu solusi yang dapat diterapkan adalah pemanfaatan mikroalga lawi-lawi (caulerpa racemosa) dalam proses fitoremediasi, yang tidak hanya berfungsi sebagai agen bioremediasi tetapi juga memiliki potensi sebagai bahan baku alternatif pakan ikan. penelitian ini bertujuan untuk mengetahui potensi lawi-lawi hasil fitoremediasi limbah cair kelapa sawit sebagai bahan baku formulasi pakan ikan nila (oreochromis niloticus) ditinjau dari hasil uji proksimat dan performa pertumbuhan. penelitian menggunakan metode rancangan acak lengkap (ral) dengan 3 perlakuan disertai 5 kali pengulangan: p1 (pakan komersial), p2 (pakan lawi-lawi dari lingkungan terkontrol), dan p3 (pakan lawi-lawi hasil fitoremediasi limbah cair kelapa sawit). parameter yang diamati meliputi pertambahan berat mutlak, panjang mutlak, spesific growth rate (sgr), specifik length rate(slr), feed corversion ratio (fcr), serta hasil uji proksimat. hasil penelitian menunjukkan bahwa p1 memiliki kandungan protein tertinggi (39,00%) dibandingkan dengan p2 (12,94%) dan p3 (12,72%). pertumbuhan ikan nila terbaik ditunjukkan oleh p1, namun p2 dan p3 masih menunjukkan performa pertumbuhan yang layak dengan nilai fcr < 2, yang mengindikasikan efisiensi konversi pakan masih tergolong baik. meskipun pertumbuhan ikan pada perlakuan p2 dan p3 relatif lebih rendah dibandingkan pakan komersial, potensi ekonomis dan ekologis dari pemanfaatan lawi-lawi hasil fitoremediasi menunjukkan peluang untuk dikembangkan sebagai alternatif pakan ramah lingkungan. kata kunci: caulerpa racemosa, limbah cair kelapa sawit, fitoremediasi, oreochromis niloticus, pakan ikan

The high production of palm oil in Indonesia produces a large amount of liquid waste (Palm Oil Mill Effluent) that has the potential to pollute the environment. One solution that can be applied is the utilization of lawi-lawi microalgae (Caulerpa racemosa) in the phytoremediation process, which not only functions as a bioremediation agent but also has potential as an alternative raw material for fish feed. This study aims to determine the potential of lawi-lawi from phytoremediation of palm oil liquid waste as a raw material for tilapia (Oreochromis niloticus) feed formulation in terms of proximate test results and growth performance. The study used a completely randomized design (CRD) method with three treatments with 5 repetitions: P1 (commercial feed), P2 (lawi-lawi feed from controlled environment), and P3 (lawi-lawi feed from phytoremediation of palm oil liquid waste), each with three replicates. Parameters observed included absolute weight and length gain, specific growth rate (SGR), feed conversion ratio (FCR), and proximate test results. The results showed that P1 had the highest protein content (39.00%) compared to P2 (12.94%) and P3 (12.72%). The best tilapia growth was shown by P1, but P2 and P3 still showed decent growth performance with FCR value < 2, which indicates feed conversion efficiency is still relatively good. Although fish growth in the P2 and P3 treatments was relatively lower than P1, P2 and P3 still showed decent growth performance with FCR values < 2, indicating good feed conversion efficiency. Although fish growth in treatments P2 and P3 was relatively lower than commercial feed, the economic and ecological potential of utilizing phytoremediated lawi-lawi shows the opportunity to be developed as an environmentally friendly feed alternative. Keywords: Caulerpa racemosa, palm oil liquid waste, phytoremediation, Oreochromis niloticus, fish feed