Judul: Konversi Limbah Plastik Dari TPS 3R Kota Bogor Menjadi Bahan Bakar Minyak Menggunakan Metode Pirolisis
Abstrak: Pirolisis dan degradasi termal merupakan metode alternatif untuk proses daur ulang akhir limbah plastik menjadi bahan bakar minyak. Penelitian bertujuan untuk melakukan pengukuran bangkitan sampah plastik di TPS 3R, menentukan kelayakan ekonomi proses pirolisis, dan menentukan jenis plastik yang paling produktif dalam proses pirolisis. Penelitian berlangsung pada bulan Februari hingga Mei 2020 menggunakan data primer hasil pengukuran di lapangan. Sampah plastik yang digunakan dalam proses pirolisis merupakan lima jenis plastik dari TPS 3R Kota Bogor yaitu low-density polyethylene (LDPE), high-density polyethylene (HDPE), polypropylene (PP), polyethylene terephthalate (PET), dan polystyrene (PS). TPS 3R Cipaku Kota Bogor melayani 2044 jiwa. Bangkitan sampah plastik PET, HDPE, LDPE, PP, dan PS pada TPS 3R Cipaku berturut-turut 1,2; 2,8; 2,0; 1,5; dan 0,3 (g/jiwa/hari). Berdasarkan hasil pirolisis, jenis plastik yang menghasilkan volume BBM tertinggi hingga terendah secara berturut-turut yaitu LDPE, PS, PP dan PET. Secara keseluruhan, keempat jenis plastik yang digunakan dalam proses pirolisis tidak layak dalam segi ekonomi (BCR<1).
Keyword: Bahan bakar minyak, dekomposisi termal, kelayakan ekonomi pirolisis, sampah plastik

Judul: Konversi Limbah Plastik dari Kampus IPB Darmaga Menjadi Bahan Bakar Minyak (BBM) Menggunakan Metode Pirolisis
Abstrak: Pirolisis merupakan alternatif pengolahan sampah plastik yang produknya berupa bahan bakar minyak. Penelitian ini bertujuan untuk mengukur timbulan sampah plastik, menentukan komposisi sampah plastik, serta menentukan kelayakan ekonomi pengolahan sampah plastik menjadi BBM. Penelitian berlangsung pada bulan Februari hingga Juli 2020 menggunakan data primer hasil pengukuran di lapangan. Sampah plastik yang digunakan dalam proses pirolisis merupakan lima jenis plastik dari TPA Cikabayan Kampus IPB Darmaga yaitu low-density polyethylene (LDPE), high-density polyethylene (HDPE), polypropylene (PP), polyethylene terephthalate (PET), dan polystyrene (PS). Sampah dipisahkan dan ditimbang berdasarkan komposisinya kemudian diolah menjadi bahan bakar minyak dengan metode pirolisis. Rata-rata bangkitan sampah plastik yang dihasilkan sebesar 39,4 kg/hari. Berdasarkan hasil pirolisis, jenis plastik yang menghasilkan volume BBM tertinggi hingga terendah secara berturut-turut yaitu PP, LDPE, PS dan PET. Analisis kelayakan ekonomi menunjukkan bahwa jenis plastik LDPE, PP, PET dan PS tidak layak secara ekonomi.
Keyword: bahan bakar minyak, kelayakan ekonomi, pirolisis, sampah plastik

Judul: Morphofunction changes of gonadal and mandibular glands of the cave swiflets (Collocalia linchi) during nesting and reproductive period
Abstrak: The present study aimed to study the morphological and histochemical changes and possible correlation between the gonads and mandibular glands of the cave swiflets (Collocalia linchi) during reproductive and nesting period. A total of seventy two adult birds were used in this study. The birds, three males and three females, were collected each month during a period of one year. After being sacrificed, samples of gonads and mandibular salivary glands were taken out and processed routinely for light microscopy. The present result showed that the gonads were active during the period of February - June. In the testis, the size of the testicle were similar throughout the year, but the testis had different color according to month. The testis in June - January were black in color, and were white and black in February, March, May and were all white in April. The size and structure of the ovaries were also increase towards February - May. Therefore the period of February - June was regarded as reproductive period of the cave swiftlet. The size and structure of mandibular glands were also clearly increased and the glands were more active during the nesting and reproductive period. Histochemically, the bindings of some lectins in the gonad and mandibular glands were also increase in the number of reactive cells and in the intensities of the positive reactions during the nesting and reproductive period, suggested that certain carbohydrates were involved and may play important roles in the reproductive function of the cave swiftlet. The present result showed that there were clear signs on the functional and structural changes of the gonads and mandibular glands of the cave swiftlets during the active nesting and reproductive period, suggested a possible regulatory mechanism of the mandibular gland through gonadal hormones pathway.
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