Analisis Jejak Karbon pada Sistem Pengelolaan Air Terproduksi di Central Processing Plant (CPP) Donggi, Sulawesi Tengah

Putri, Sabitha Angelina (2026) Analisis Jejak Karbon pada Sistem Pengelolaan Air Terproduksi di Central Processing Plant (CPP) Donggi, Sulawesi Tengah. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Industri minyak dan gas bumi merupakan salah satu sektor dengan intensitas emisi gas rumah kaca tertinggi, berkontribusi sekitar 15% dari total emisi sektor energi global. Air terproduksi merupakan limbah cair dengan volume terbesar dalam kegiatan produksi migas yang mengandung hidrokarbon sisa, bahan kimia, serta kontaminan organik dan anorganik. Pengelolaannya di Central Processing Plant (CPP) memerlukan konsumsi energi intensif yang berkontribusi signifikan terhadap emisi gas rumah kaca. Kajian jejak karbon yang secara spesifik mengkuantifikasi kontribusi emisi per unit proses pengolahan air terproduksi masih sangat terbatas, sehingga diperlukan analisis yang komprehensif sebagai dasar strategi dekarbonisasi fasilitas migas. Penelitian ini bertujuan mengkuantifikasi jejak karbon sistem pengolahan air terproduksi di CPP Donggi Pertamina EP, Toili, Sulawesi Tengah, mencakup unit HP Separator, Water Stripper, Water Coalescer, BSRU, Bioreactor Aerobic, Centrifuge, Membrane System, dan Treated Produced Water Tank. Perhitungan dilakukan menggunakan pendekatan faktor emisi berdasarkan IPCC (2006) dan GHG Protocol, mencakup konsumsi listrik Gas Turbine Generator berbahan bakar natural gas (Scope 1), penggunaan bahan kimia (Scope 3), dan transportasi bahan kimia (Scope 3). Data aktivitas diperoleh melalui data operasional lapangan tahun 2025.
Berdasarkan hasil perhitungan, total jejak karbon sistem pengolahan air terproduksi sebesar 12.344,43 tCO₂/tahundengan intensitas emisi 101,08 kgCO₂/m³. Kontribusi terbesar berasal dari konsumsi listrik Gas Turbine Generator (99,01%), dengan Water Stripper sebagai hotspot utama (44,19%). Berdasarkan sumber emisi dominan tersebut, dilakukan root cause anlalysis sehingga diusulkan tiga alternatif reduksi yaitu pemasangan Variable Speed Drive (VSD) pada Cooling Water Circulation Pump 110 kW menghasilkan reduksi sebesar 670,67 tCO₂/tahun, integrasi Solar PV hibrida 1 MWp dengan reduksi sebesar 340,02 tCO₂/tahun, serta penanaman 152 pohon damar dengan reduksi emisi sebesar 3,50 tCO₂/tahun. Penerapan ketiga alternatif tersebut secara simultan berpotensi menurunkan jejak karbon sebesar 1.014,29 tCO₂/tahun (8,22%), sehingga intensitas emisi menjadi 92,78 kgCO₂/m³.
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The oil and gas industry is one of the sectors with the highest greenhouse gas (GHG) emission intensities, contributing approximately 15% of total global energy-sector emissions. Produced water is the largest-volume liquid waste generated during oil and gas production and contains residual hydrocarbons, production chemicals, and various organic and inorganic contaminants. Its treatment at the Central Processing Plant (CPP) requires intensive energy consumption, which significantly contributes to greenhouse gas emissions. However, studies that specifically quantify the carbon footprint of individual produced water treatment units remain limited, highlighting the need for a comprehensive assessment to support decarbonization strategies in oil and gas facilities. This study aims to quantify the carbon footprint of the produced water treatment system at CPP Donggi, Pertamina EP, Toili, Central Sulawesi, covering the HP Separator, Water Stripper, Water Coalescer, Biological Sulphur Recovery Unit (BSRU), Aerobic Bioreactor, Centrifuge, Membrane System, and Treated Produced Water Tank. Carbon footprint calculations were performed using the emission factor approach based on the IPCC (2006) Guidelines and the GHG Protocol, including emissions from natural gas-fired Gas Turbine Generator (GTG) electricity consumption (Scope 1), chemical usage (Scope 3), and chemical transportation (Scope 3). Activity data were obtained from the facility’s 2025 operational records. The results indicate that the total carbon footprint of the produced water treatment system was 12,344.43 tCO₂/year, with an emission intensity of 101.08 kgCO₂/m³. The largest contribution originated from electricity consumption by the Gas Turbine Generator, accounting for 99.01% of total emissions, while the Water Stripper was identified as the primary emission hotspot, contributing 44.19%. Based on the dominant emission sources, a root cause analysis was conducted, leading to the proposal of three emission reduction alternatives: installing a Variable Speed Drive (VSD) on the 110-kW Cooling Water Circulation Pump, with a potential reduction of 670.67 tCO₂/year; integrating a 1-MWp hybrid solar photovoltaic (PV) system, reducing emissions by 340.02 tCO₂/year; and planting 152 damar trees (Agathis dammara), providing an additional reduction of 3.50 tCO₂/year. The simultaneous implementation of these three alternatives has the potential to reduce the carbon footprint by 1,014.29 tCO₂/year (8.22%), thereby lowering the emission intensity to 92.78 kgCO₂/m³.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Air Terproduksi, Emisi GRK, IPCC, Jejak Karbon, Sumur Injeksi, Carbon Footprint, Greenhouse Gas Emissions, Injection Well, IPCC, Produced Water
Subjects:	T Technology > TD Environmental technology. Sanitary engineering > TD171.75 Climate change mitigation T Technology > TD Environmental technology. Sanitary engineering > TD194.6 Environmental impact analysis T Technology > TD Environmental technology. Sanitary engineering > TD433 Water treatment plants
Divisions:	Faculty of Civil Engineering and Planning > Environment Engineering > 25201-(S1) Undergraduate Thesis
Depositing User:	Sabitha Angelina Putri
Date Deposited:	30 Jul 2026 06:08
Last Modified:	30 Jul 2026 06:08
URI:	http://repository.its.ac.id/id/eprint/136927

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