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PERBAIKAN BAKU MUTU AIR LIMBAH MELALUI OPTIMASI GREASE TRAP INDUK PADA SISTEM STP (STUDI KASUS: PONDOK INDAH MALL 2) Kerlima Hutagaol; Sri Hartanto; Muhammad Ilham Setiawan; Tri Mulait; Ahmad Ziddan Asyaffa
Journal of Innovation Research and Knowledge Vol. 6 No. 2 (2026): Juli 2026
Publisher : Bajang Institute

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Abstract: Sistem pengolahan limbah cair (Sewage Treatment Plant/STP) pada fasilitas komersial seperti pusat perbelanjaan memiliki tantangan utama dalam menangani beban pencemar berbasis lemak, minyak, dan grease (FOG) yang berasal dari aktivitas food and beverage (F&B). Kandungan grease yang tinggi berpotensi menurunkan efisiensi proses biologis, menyebabkan fouling pada sistem aerasi, serta menghambat pemenuhan baku mutu air limbah. Penelitian ini bertujuan untuk menganalisis pengaruh penambahan grease trap induk terhadap peningkatan kinerja STP dengan kapasitas 750 m³/hari di Pondok Indah Mall 2. Metode yang digunakan adalah pendekatan kuantitatif berbasis analisis performa sistem sebelum dan sesudah intervensi, dengan parameter utama meliputi Chemical Oxygen Demand (COD), Biological Oxygen Demand (BOD), Total Suspended Solids (TSS), dan oil and grease, serta rasio recycle air hasil olahan. Hasil analisis menunjukkan bahwa penambahan grease trap induk mampu menurunkan konsentrasi oil and grease hingga 68%, yang berdampak pada peningkatan efisiensi proses biologis dan stabilitas sistem. Nilai COD menurun dari 180 mg/L menjadi 80 mg/L, sedangkan rasio recycle meningkat dari 25% menjadi 64%. Secara keseluruhan, intervensi upstream ini terbukti efektif dalam mengurangi beban pencemar sebelum masuk ke unit pengolahan utama, sehingga meningkatkan kualitas effluent dan mendukung pemanfaatan kembali air olahan.
Tanggung Jawab Notaris Atas Akta Perjanjian Pengikatan Jual Beli Saham Yang Dibalut Dengan Hutang Piutang Edison Hatoguan Manurung; Sri Hartanto
Journal of Innovation Research and Knowledge Vol. 6 No. 3 (2026): Agustus 2026
Publisher : Bajang Institute

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Civil engineering practice requires professionals who possess not only strong technical competence but also high integrity and professional ethics in carrying out their duties and responsibilities. These three aspects are essential for ensuring the quality of construction work, public safety, and the successful implementation of infrastructure projects. This study aims to analyze the relationship between competence, integrity, and professional ethics in civil engineering practice. The study employed a descriptive-analytical approach by reviewing relevant scientific literature on professional competence, integrity, and professional ethics in civil engineering and related engineering professions. The data were analyzed through the processes of identification, classification, and synthesis of previous research findings concerning these three variables. The results indicate that competence plays a significant role in improving the quality of technical decision-making, work effectiveness, and compliance with professional standards. Integrity contributes to maintaining honesty, responsibility, transparency, and accountability in civil engineering practice. Furthermore, competence and integrity complement each other in shaping professional ethics. Competence provides the technical capabilities required to perform engineering tasks, while integrity ensures that these capabilities are applied responsibly in accordance with moral principles and professional codes of ethics. Therefore, continuous development of professional competence and the strengthening of integrity are essential to promote ethical, professional, and socially responsible civil engineering practice while ensuring public safety