Judul: Strategi Pengelolaan Limbah Cair Industri Pengolahan Ikan di Pelabuhan Perikanan Nusantara Tanjungpandan
Abstrak: Pelabuhan Perikanan Nusantara (PPN) Tanjungpandan belum memiliki Instalasi Pengolahan Air Limbah (IPAL) yang menyebabkan industri pengolahan ikan yang ada di dalam kawasan pelabuhan membuang limbah cair hasil produksi langsung ke kolam pelabuhan. Kondisi tersebut menyebabkan kolam pelabuhan terindikasi telah terjadi pencemaran lingkungan perairan. Penelitian ini bertujuan untuk menghitung status mutu air pada kolam pelabuhan, mengidentifikasi pengelolaan limbah cair industri pengolahan ikan, dan merumuskan strategi pengelolaan limbah cair industri pengolahan ikan. Data kualitas air diperoleh dari dokumen hasil pengukuran kualitas air milik PPN Tanjungpandan sedangkan data penilaian pengelolaan limbah cair dikumpulkan melalui wawancara dengan kuesioner. Analisis STORET, analisis deskriptif, analisis SWOT, dan analisis USG digunakan dalam penelitian ini. Hasil penelitian menunjukkan bahwa status mutu air pada kolam pelabuhan di PPN Tanjungpandan memperoleh nilai indeks sebesar -40. Nilai indeks tersebut menunjukkan status mutu air termasuk klasifikasi tercemar berat. Pengelolaan limbah cair industri pengolahan ikan dinilai menggunakan tiga parameter sebagai indikator penilaian dengan total skor yang diperoleh ialah tujuh yang artinya pengelolaan limbah cair industri di PPN Tanjungpandan termasuk dalam ketegori buruk. Strategi pengelolaan limbah cair industri pengolahan ikan di PPN Tanjungpandan terdiri dari delapan strategi. Strategi menyediakan fasilitas IPAL terpadu agar industri dapat mengolah limbah cair hasil kegiatan produksi menjadi strategi prioritas. Kata kunci: industri pengolahan ikan, limbah cair, pencemaran lingkungan, PPN Tanjungpandan, strategi, The Tanjungpandan Fishing Port (TFP) does not yet have a Wastewater Treatment Plant (WTP), which causes the fish processing industry in the port area to dispose of the liquid waste produced directly into the port basin. This condition causes port basin to have indicated that there pollution of the aquatic environment. This study aims to measure the status of water quality in port ponds, identify wastewater management from the fish processing industry, and formulate a strategy for managing liquid waste from the fish processing industry. Water quality data was obtained from the water quality measurement document belonging to TFP, while data on liquid waste management assessment was collected through interviews with questionnaires. STORET analysis, descriptive analysis, SWOT analysis, and USG analysis were used in this study. The results showed that the water quality status in the port pool at TFP obtained an index value of -40. The index value indicates the status of water quality included in the classification as heavily polluted. The assessment of the wastewater management of the fish processing industry uses three parameters for the assessment indicator with a total score of seven, which means that the management of industrial wastewater at TFP is in a bad category. The strategy for managing liquid waste from the fish processing industry at TFP consists of eight strategies. Providing integrated IPAL facilities so that the industry can process liquid waste resulting from production activities is a priority strategy. Keywords: fish processing industry, liquid waste, strategy, environmental pollution, Tanjungpandan Fishing Port, strategy
Keyword: fish processing industry, liquid wate, strategy, enviromental pollution, Tanjungpandan Fishing Port

Judul: Management Strategy for Liquid Waste of Fish Processing Units in the Muara Angke Fishing Port North Jakarta
Abstrak: Pelabuhan Perikanan Nusantara (PPN) Muara Angke belum memiliki Instalasi Pengolahan Air Limbah (IPAL) sehingga hampir semua Unit Pengolahan Ikan (UPI) membuang limbah tanpa diolah. Kondisi tersebut dalam jangka panjang dapat berpotensi menyebabkan pencemaran lingkungan, sehingga perlu adanya kajian terkait pengelolaan limbah cair dari UPI di kawasan PPN Muara Angke. Penelitian ini bertujuan untuk mengidentifikasi pengelolaan limbah cair unit pengolahan ikan di PPN Muara Angke, Membandingkan kualitas limbah cair unit pengolahan ikan dengan baku mutu limbah industri pengolahan ikan berdasarkan PERMEN-LH No. 05 Tahun 2014, serta Merumuskan strategi pengelolaan limbah cair unit pengolahan ikan di PPN Muara Angke. Data untuk mengidentifikasi pengelolaan limbah cair UPI dan membuat strateginya dikumpulkan melalui wawancara dengan kuesioner menggunakan metode snowball sampling dan purposive sampling sedangkan data kualitas air di salah satu industri UPI diperoleh dari mengambil sampling air pada saluran sebelum masuk ke perairan penerima air limbah. Analisis deskriptif, analisis komparatif deskriptif, dan analisis SWOT digunakan dalam penelitian ini. Hasil penelitian menunjukan pengelolaan limbah cair UPI belum optimal. Kualitas air limbah UPI menunjukkan hampir semua masih dibawah baku mutu dan hanya satu yang diatas baku mutu, yaitu parameter TSS. Strategi pengelolaan limbah cair UPI di PPN Muara Angke terdiri dari delapan strategi. Strategi merumuskan SOP penanganan limbah cair industri UPI di PPN Muara Angke, strategi uji kualitas air baik di UPI dan di perairan, dan strategi menyediakan fasilitas IPAL terpadu menjadi prioritas. Kata Kunci: industri pengolahan ikan, limbah cair, pencemaran lingkungan, PPN Muara Angke, strategi, The Muara Angke Fishing Port (PPN) does not yet have a Wastewater Treatment Plant (WTP) so that almost all Fish Processing Units (UPI) dispose of waste without being processed. In the long term, these conditions can potentially cause environmental pollution, so it is necessary to conduct a study related to the management of liquid waste from UPI in the PPN Muara Angke area. This study aims to identify the management of fish processing unit wastewater at PPN Muara Angke, compare the quality of fish processing unit wastewater with the quality standards of fish processing industry waste based on Permen LH No. 05 of 2014, as well as formulating a strategy for managing fish processing unit wastewater at PPN Muara Angke. Data to identify UPI wastewater management and formulate a strategy were collected through interviews with questionnaires using the snowball sampling and purposive sampling methods, while water quality data in one of the UPI industries were obtained from taking water samples in the canal before entering the wastewater receiving waters. Descriptive analysis, descriptive comparative analysis, and SWOT analysis were used in this study. The results showed that UPI's liquid waste management was not optimal. The quality of UPI's wastewater shows that almost all of it is still below the quality standard and only one is above the quality standard, namely the TSS parameter. UPI's liquid waste management strategy at PPN Muara Angke consists of eight strategies. The strategy formulating SOPs for handling UPI industrial liquid waste at PPN Muara Angke, strategy testing water quality both at UPI and in the waters, and strategy providing integrated WTP facilities are priorities. Keywords: environmental pollution, fish
Keyword: industri pengolahan ikan, limbah cair, pencemaran lingkungan, PPN Muara Angke, Strategi

Judul: Metrik Einstein (Anti-) Self-Dual Berdimensi Empat dengan Metode Cartan
Abstrak: Gravitational field equation can be formulated in differential forms (differential geometry), which describes gravity as a manifestation of the curvature of space-time. Curvature of space-time is characterized by a metric that satisfies the gravitational field equation. With differential forms it can be formulated the (anti-) self-dual Einstein equation, which is a modification of the Cartan structure in (anti-) self-dual basis. Calculation of (anti-) self-dual metric with (anti-) self-dual Einstein equation is simpler than the calculation using Christoffel symbols.
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