Judul: Economic Potential Analysis and Sustainable Green Shell (Perna viridis) Waste Management Strategy (Case Study: Ketapang Village, Mauk District, Tangerang Regency)
Abstrak: Salah satu komoditas unggulan wilayah pesisir adalah kerang. Berdasarkan survei di lapang terdapat enam pengusaha produksi perebusan kerang hijau di Desa Ketapang, Kecamatan Mauk, Kabupaten Tangerang. Kegiatan tersebut memberikan dampak negatif terhadap lingkungan berupa timbulan limbah cangkang kerang hijau. Pengelolaan limbah cangkang kerang hijau yang berkelanjutan sangat dibutuhkan untuk mengurangi timbulan limbah cangkang kerang di Desa Ketapang. Oleh karena itu, penelitian ini bertujuan untuk: (1) Mengidentifikasi kerang hijau di Desa Ketapang; (2) Mengidentifikasi manfaat pengelolaan cangkang kerang hijau di dalam sircular economy; (3) Menganalisis potensi ekonomi pengelolaan limbah cangkang kerang hijau; (4) Menganalisis strategi pengembangan pengelolaan limbah cangkang kerang hijau berkelanjutan. Metode analisis yang digunakan yaitu perhitungan rendemen, analisis biaya dan manfaat dan Analytical Hierarchy Process. Hasil penelitian menunjukkan bahwa limbah yang dihasilkan Desa Ketapang dalam sebulan mencapai 155,5 ton. Potensi ekonomi yang timbul dari pengelolaan limbah cangkang kerang hijau menjadi tepung cangkang kerang hijau di Desa Ketapang sebesar Rp432.000.000,00 per tahun. Strategi pengembangan pengelolaan limbah cangkang kerang hijau berkelanjutan di Desa Ketapang, Kecamatan Mauk, Kabupaten Tangerang menghasilkan prioritas kriteria kelembagaan dengan prioritas alternatif yaitu, melibatkan karang taruna dalam pengelolaan, melakukan pemasaran kemitraan dalam pengelolaan limbah cangkang kerang hijau, dan melakukan pengembangan usaha berbasis sircular economy., Shellfish is one of the leading commodities in coastal areas. Based on a survey in the field, there are six producers of green mussel stew production in Ketapang Village, Mauk District, Tangerang Regency. These activities negatively impact the environment in the form of waste generation. Sustainable management of green mussel shell waste is very much needed to reduce the generation of shellfish waste in Ketapang Village. Therefore, this study aims to: (1) Identify green mussel shell waste in Ketapang Village; (2) Identify the benefits of green mussel shell management in a circular economy; (3) Analyze the economic benefits of green mussel shell waste management; (4) Analyzing the development strategy of sustainable green mussel shell waste management. The analytical methods used are yield calculation, cost and benefit analysis, and Analytical Hierarchy Process. The results showed that the waste produced by Ketapang Village in a month reached 155.5 tons. The economic potential arising from managing green mussel shell waste into green mussel shell flour in Ketapang Village is Rp432.000.000,00 annually. The strategy for developing sustainable green mussel shell waste management in Ketapang Village, Mauk District, Tangerang Regency produces institutional priority criteria with priority alternatives, namely involving youth groups in management, marketing partnerships in managing green mussel shell waste, and conducting business development based on a circular economy.
Keyword: cost and benefit analysis, circular economy, circular economy, yield calculation

Judul: Estimasi Manfaat Ekonomi dan Strategi Pengelolaan Limbah Cangkang Kerang Berkelanjutan (Studi Kasus: PLTU Banten 3 Lontar)
Abstrak: Air laut menjadi bahan baku utama untuk proses penguapan dalam Pembangkit Listrik Tenaga Uap (PLTU). Proses penyaringan air laut di PLTU untuk menghasilkan energi juga menghasilkan limbah, termasuk limbah cangkang kerang. Limbah cangkang kerang di PLTU Banten 3 Lontar dapat dijadikan bahan pengganti untuk berbagai produk dan sisanya dibuang langsung ke Tempat Pemrosesan Akhir (TPA) Jatiwaringin. Tujuan dari penelitian ini adalah (1) mengidentifikasi proses pengelolaan dan pemanfaatan limbah cangkang kerang oleh PLTU Banten 3 Lontar (2) mengestimasi manfaat ekonomi dari pengelolaan limbah cangkang kerang di PLTU Banten 3 Lontar serta (3) menganalisis strategi pengembangan pengelolaan limbah cangkang kerang berkelanjutan di PLTU Banten 3 Lontar. Metode yang digunakan dalam penelitian ini adalah deskriptif kualitatif, analisis kuantitatif dengan pendekatan harga pasar dan PROMETHEE. Hasil penelitian menunjukkan bahwa terdapat pemanfaatan internal maupun eksternal limbah cangkang kerang di PLTU Banten 3 Lontar. Terdapat penghematan biaya karena adanya substitusi tepung cangkang kerang dengan bahan konvensional dalam pembuatan produk sebesar 94,95%. Pengembangan bahan campuran untuk pakan ternak merupakan alternatif strategi terbaik yang menjadi prioritas di PLTU Banten 3 Lontar., Seawater is the main raw material for the evaporation process in the Steam Power Plant (PLTU). The process of filtering seawater in PLTU to produce energy also produces waste, including clam shell waste. Clam shell waste in PLTU Banten 3 Lontar can be used as a substitute material for various products and the rest is disposed of directly to the Jatiwaringin Final Processing Site (TPA). Therefore, the objectives of this study are (1) to identify the process of management and utilization of clam shell waste by PLTU Banten 3 Lontar (2) to estimate the economic benefits of clam shell waste management in PLTU Banten 3 Lontar (3) to analyze the development strategy of sustainable clam shell waste management in PLTU Banten 3 Lontar. The methods used in this research are descriptive qualitative, quantitative analysis with market price and PROMETHEE approaches. The results showed that there was internal and external utilization of clam shell waste at PLTU Banten 3 Lontar. There are cost savings due to the substitution of clam shell flour with conventional materials by 94.95%. The development of mixed materials for animal feed is the best alternative strategy that is prioritized in PLTU Banten 3 Lontar.
Keyword: PLTU waste, PROMETHEE, Waste added value, limbah PLTU, nilai penghematan limbah

Judul: Comparison of HIV Model with and without Time Delay
Abstrak: Acquired immunodeficiency syndrome (AIDS) is the reduction of the human immune system. AIDS is caused by human immunodeficiency virus (HIV). No medicine has been found for this desease until recently. An AIDS therapy is usually performed with highly active antiretroviral therapy, namely reverse transcriptase inhibitors, protease inhibitors and combination of both. Various models have been developed to explain the immune system of patients with AIDS, namely the HIV, response and the time delay model. This paper discusses the comparison between the dynamics of the HIV virus, the dynamic response of protease inhibitors and dynamics of time delay. The dynamics model of HIV is influenced by the level of white blood cells produced and the rate of its death. Dynamics of protease inhibitors on the response and the time delay model is influenced by the death rate of infected white blood cells and the failure rate of treatment.
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