Judul: Produksi Biolistrik Limbah Cair Pemindangan dengan Sistem Salt Bridge Microbial Fuel Cell Berbahan Natrium Alginat
Abstrak: Microbial fuel cell (MFC) merupakan suatu teknologi alternatif penghasil energi listrik dari limbah cair. Microbial fuel cell dua bejana terdiri dari bejana anoda dan katoda yang dihubungkan oleh membran penukar proton maupun jembatan garam. Na-alginat merupakan polimer alami yang dapat dijadikan media jembatan garam. Penelitian ini bertujuan menentukan produksi biolistrik dan penurunan beban polusi dari limbah cair pemindangan dengan sistem salt-bridge microbial fuel cell berbahan Na-alginat. Konsentrasi Na-alginat yang digunakan yaitu 10%, 15%, dan 20%. Nilai elektrisitas tertinggi diperoleh pada perlakuan konsentrasi Na-alginat 20% yaitu nilai tegangan listrik sebesar 1,53 V, arus listrik sebesar 3,96 mA, dan daya listrik sebesar 6,03 mW. MFC jembatan garam Na alginat mampu menurunkan parameter biological oxygen demand (BOD) dan total ammonia nitrogen (TAN) sebesar 73% dan 76%. Perbedaan konsentrasi Na-alginat mempengaruhi kinerja MFC. Perlakuan terbaik terdapat pada konsentrasi Na-alginat 20%., Microbial fuel cell is an alternative technology for producing electrical energy from wastewater. Dual chamber MFCs consists of anode and cathode chambers connected with a proton exchange membrane or salt bridge. Sodium alginate is a natural polymer that can be used as salt bridge medium. This study was aimed to determine the bioelectric production and reduce the pollution load from the effluent using salt-bridge microbial fuel cell system made from Na-alginate. The sodium alginate concentrations used were 10%, 15%, and 20%. The highest value of electricity was obtained in the treatment of 20% sodium alginate concentration, the electric voltage was 1,53 V, the electric current was 3,96 mA, and the electric power was 6,03 mW. Sodium alginate salt bridge MFCs were able to reduce BOD and TAN parameters by 73% and 76%, respectively. Differences in Na-alginate concentrations affect MFC performance. The best treatment was at a concentration of 20% Na-alginate.
Keyword: elektrisitas, jembatan garam Na-alginat, limbah cair perikanan, microbial fuel cell

Judul: Kinerja Membran Komposit Kitosan-Sodium Alginat pada Sistem Microbial Fuel Cell dalam Menghasilkan Biolistrik dari Limbah Pemindangan Ikan.
Abstrak: Microbial Fuel Cell (MFC) merupakan sumber energi alternatif sebagai penghasil energi listrik dan dapat berasal dari limbah cair perikanan. Membran yang umum digunakan pada MFC yaitu membran nafion tetapi harganya mahal dan harus impor. Alternatif lain yaitu membuat membran dari kitosan dan sodium alginat. Penelitian ini bertujuan menentukan kinerja MFC dalam menghasilkan elektrisitas menggunakan membran kitosan-sodium alginat. Penelitian ini dilakukan dengan empat tahapan yaitu melakukan karakterisasi limbah cair perikanan yang meliputi BOD, COD, pH dan TAN, membuat dan mengkarakterisasi membran komposit dengan perlakuan komposisi alginat dengan kitosan 1:1, 2:1, dan 3:1 (v/v), membuat desain MFC serta mengukur kinerja listrik MFC. Membran kitosan-sodium alginat 2:1 (v/v) menghasilkan nilai elektrisitas tertinggi yaitu tegangan sebesar 0,960±0,077 V, kuat arus sebesar 3,909±2,354 mA dan daya listrik sebesar 3,717±2,176 mW.
Keyword: energi listrik, membran kitosan-sodium alginat, microbial fuel cell

Judul: Posisi Filogenetik Kura-Kura Carettochelys Insculpta  (Reptillia: Testudinata)
Abstrak: Carettochelys insculpta is an endemic freshwater turtle of southern Papua and northern Australia. Phylogenetic position of this turtle is remain unresolved until now. Most of the research conducted show close relationships of C. insculpta and members of Trionychidae family. However, some of the research show distance between C. insculpta and members of Trionychidae family. This research is conducted to analyze phylogenetic relationship between C. insculpta and other members of Testudinata using 12S rRNA, 16S rRNA, and both gene as markers. DNA samples were obtained from three different organisms of C. insculpta. Two species used as outgroups were Alligator mississippiensis and Iguana iguana. Phylogenetic analysis was carried out using Neighbor-Joining method with Felsenstein 1981 (F81) modeltest. A polytomy tree of Testudinata was produced by using 12S rRNA gene. However, analysis using 16S rRNA and both genes as markers confirmed that C. insculpta was located between the Chelonidae and the Trionychidae family.
Keyword: