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: Pengelolaan Limbah Cair Industri Perikanan di Pelabuhan Perikanan Pantai Tegalsari, Provinsi Jawa Tengah
Abstrak: Perairan Pelabuhan Perikanan Pantai (PPP) Tegalsari mengalami pencemaran yang disebabkan oleh limbah cair dari industri perikanan tanpa proses pengolahan. Penelitian ini bertujuan untuk membandingkan kualitas limbah cair dan mutu air laut di PPP Tegalsari dengan baku mutu yang berlaku, mengidentifikasi eksisting pengelolaan limbah cair di PPP Tegalsari, dan merumuskan strategi pengelolaan limbah cair industri perikanan di PPP Tegalsari. Data dianalisis menggunakan analisis komparatif dengan baku mutu PERMEN LH No.05 Tahun 2014, analisis deskriptif, metode STORET (Storage and Retrieval of Water Quality Data System), SWOT (Strength, Weakness, Opportunities, Threats) dan USG (Urgency, Seriousness, Growth). Hasil penelitian menunjukkan bahwa kualias air limbah melebihi baku mutu dengan memperoleh skor -50 sehingga status mutu air laut di PPP Tegalsari dalam kategori tercemar berat. Pengelolaan limbah cair industri perikanan di PPP Tegalsari termasuk dalam ketegori buruk. Strategi pengelolaan limbah cair industri perikanan di PPP Tegalsari terdiri dari delapan strategi., The waters of the Tegalsari Coastal Fishing Port (PPP) are experiencing pollution caused by liquid waste from the fishing industry without processing. This research aims to compare the quality of liquid waste and sea water quality at PPP Tegalsari with applicable quality standards, identify existing liquid waste management at PPP Tegalsari, and formulate a strategy for managing liquid waste for the fishing industry at PPP Tegalsari. Data were analyzed using comparative analysis with quality standards PERMEN LH No.05 of 2014, descriptive analysis, STORET (Storage and Retrieval of Water Quality Data System), SWOT (Strength, Weakness, Opportunities, Threats) and USG (Urgency, Seriousness, Growth) methods. The research results show that the quality of waste water exceeds the quality standard by obtaining a score of -50 so that the quality status of sea water at PPP Tegalsari is in the heavily polluted category. Management of liquid waste from the fishing industry at PPP Tegalsari is included in the bad category. The fishing industry liquid waste management strategy at PPP Tegalsari consists of eight strategies.
Keyword: fishing industry, liquid waste, pollution, Tegalsari fishing port, water quality

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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