Judul: Eceng Gondok Eichhornia crassipes dan Tanaman Kiambang Salvinia molesta Sebagai Fitoremediator Limbah Detergen pada Pendederan Ikan lele Sangkuriang Clarias sp.
Abstrak: Penelitian ini bertujuan mengevaluasi efektivitas penyerapan limbah detergen oleh tanaman eceng gondok dan tanaman kiambang melalui proses fitoremediasi untuk pendederan ikan lele sangkuriang. Rancangan percobaan yang digunakan dalam penelitian yaitu Rancangan Acak Lengkap (RAL) dengan 4 perlakuan dan 2 kali ulangan yang terdiri atas perlakuan kontrol, pemberian detergen 5 mg/L tanpa tanaman air, pemberian detergen 5 mg/L dengan tanaman eceng gondok, dan pemberian detergen 5 mg/L dengan tanaman kiambang. Penelitian dilaksanakan selama 40 hari. Penelitian dilakukan dengan menggunakan 3 unit akuarium tandon berukuran 32 x 48 x 40 cm3 pada volume air 46 liter dan 1 unit akuarium tandon berukuran 75 x 48 x 40 cm3 pada volume air 90 liter, serta 8 unit akuarium pemeliharaan berukuran 30 x 20 x 20 cm3 pada volume air 9 liter. Benih lele sangkuriang yang digunakan memiliki bobot ratarata 1,64±0,01 gram dan panjang rata-rata 5,65±0,26 cm. Pakan diberikan secara ad satiation (sekenyangnya) dengan frekuensi 3 kali sehari. Parameter uji meliputi parameter kualitas air, tingkat kelangsungan hidup, laju pertumbuhan spesifik, rasio konversi pakan, jumlah konsumsi pakan, dan analisis histopatologi. Hasil yang didapatkan tanaman kiambang efektif dalam menyerap limbah detergen melalui proses fitoremediasi untuk pendederan ikan lele sangkuriang Clarias sp.
Keyword: Phytoremediation, Eichhornia crassipes, Salvinia molesta, Detergent

Judul: Pemanfaatan Rumput Vetiver (Vetiveria zizanioides) sebagai Fitoremediator dalam Pengolahan Limbah Budidaya Lele Sangkuriang (Clarias gariepinus).
Abstrak: Aquaponic is a combination of aquaculture and plant using recirculation system. Sangkuriang catfish (Clarias gariepinus) and vetiver (Vetiveria zizanioides) were used as experimental media of phytoremediation. This research aims to treat and utilize organic wastewater of sangkuriang catfish use vetiver grass. Measure the growth of sangkuriang catfish and vetiver in the recirculation system. Analysis of the data used was In Time Completely Randomized Design to determine the effect of treatment of vetiver grass on water quality parameters temperature, pH, dissolved oxygen, ammonia, nitrate, and orthophosphate. Biological parameters measured include SR, SGR, length and weight of fish growth, and growth of vetiver grass length. The result showed that the use of vetiver could reduce levels of ammonia up to 88,44%, nitrate 75,34%, and orthophosphate 96%. Spearman Rank Correlation test of aquarium treatment shows positive correlation between pH with nitrate and orthophosphate, and between nitrate and orthophospahate.
Keyword: Aquaponics, phytoremediation, sangkuriang catfish, vetiver, water quality

Judul: Penggunaan Teorema Homeomorphy 2-Manifold dan Teorema Euler Poincare pada Torus 𝑇�� dan Simplicial Complex 𝐾��
Abstrak: Two dimensional topological spaces are said to be homeomorphic if they have the same topological invariant, where one of topological invariant used is an Euler characteristic. Homeomorphy 2-Manifold’s Theorem and Euler Poincare’s Theorem are used to distinguish two topological spaces. Homeomorphy 2-Manifold’s Theorem uses Euler characteristic to identify two dimensional topological spaces. Euler Poincare’s Theorem is an alternative way to find Euler characteristic with Betti number, which is topological invariant as well. The objective of this paper is to investigate the homeomorphism of torus 𝑇����� and simplicial complex 𝐾�����. Topological space torus and simplicial complex 𝐾����� have the same Euler characteristic, which is two. Based on Homeomorphy 2-Manifold’s Theorem topological space torus 𝑇����� and simplicial complex 𝐾����� is homeomorphic.
Keyword: simplicial, torus, Euler, homeomorphism, topology