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ANALISA KINERJA DESALINASI REVERSE OSMOSIS PADA SWRO & BWRO PT. BLACK BEAR RESOURCES INDONESIA

AL MUHAJIR, Faizur and Widayat, Widayat and Suedy, Sri Widodo Agung (2024) ANALISA KINERJA DESALINASI REVERSE OSMOSIS PADA SWRO & BWRO PT. BLACK BEAR RESOURCES INDONESIA. Masters thesis, UNIVERSITAS DIPONEGORO.

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Abstract

Desalinasi Reverse Osmosis PT. BBRI menggunakan SWRO dan BWRO dengan air laut sebagai bahan baku. Desain produksi unit SWRO sebesar 210m3 per hari dan BWRO 178m3 per hari yang menggunakan Membrane Spiral Wound dengan material Polyamide. Proses SWRO membutuhkan energi yang signifikan untuk mencapai tekanan osmotic melalui Semi-Permeable Membrane. Untuk mengurangi konsumsi energi spesifik (SEC) digunakan perangkat pemulihan energi (Energy Recovery Devices). ERD memanfaatkan tekanan dari limbah proses desalinasi untuk membantu memompa bahan baku air laut menuju Membrane. Dengan cara ini, ERD membantu meningkatkan efisiensi keseluruhan proses dan mengurangi biaya operasional. Kinerja desalinasi RO bervariasi seiring dengan perubahan kualitas bahan baku. Secara umum desalinasi Reverse Osmosis akan beroperasi dengan hasil yang konsisten dalam jangka waktu yang lama jika parameter operasi (terutama kualitas bahan baku) tetap konstan. Scaling & Fouling akan terjadi secara perlahan seiring masa pakai umur Membrane dan kondisi operasional. Analisa kinerja RO dapat dipahami dari perubahan Recovery Rate, Percent Rejection, Reject Concentration, Flux, dan SEC (Specific Energy Consumption).
Kinerja rata rata desalinasi SWRO PT. BBRI diukur dari Recovery Rate sebesar 36,9% untuk unit SWRO-A dan 37% untuk unit SWRO-B, apabila dilihat dari kemampuan rejeksi nilai Percent Rejection SWRO-A sebesar 96,63% dan SWRO-B sebesar 97,03%. Terdapat kemungkinan terjadinya Scaling atau Fouling sehingga target 40% Recovery Rate dan target 99,5% Percent Rejection tidak tercapai. Kinerja Membrane BWRO-B Recovery Rate rata-rata sebesar 60,12% dengan Percent Rejection rata-rata sebesar 99%. Unit SWRO beroperasi pada tekanan tinggi 34 hingga 40kg/cm2 hal ini diperoleh dari HP Pump dan ERD Turbocharger. SWRO PT. BBRI menggunakan ERD Turbocharger yang berdampak signifikan terhadap penurunan angka SEC. Tingkat konsumsi energi per meter kubik air yang dihasilkan rata rata sebesar 4,05kWH/m3 untuk SWRO-A, 3,89kWH/m3 untuk SWRO-B, dan 0,94kWH/m3 untuk BWRO-B.
Kata kunci: Reverse Osmosis, SWRO, BWRO, PT. BBRI, SEC, Analisa Kinerja

Reverse Osmosis Desalination by PT. BBRI utilizes both SWRO and BWRO systems, with seawater as the raw material. The production capacity of the SWRO unit is 210m3/d and BWRO is 178m3/d, employing Spiral Wound Membranes made of Polyamide material. The SWRO process requires significant energy to achieve osmotic pressure across the Semi-Permeable Membrane. To reduce Specific Energy Consumption (SEC), Energy Recovery Devices (ERDs) are employed. ERDs harness pressure from the desalination process waste to assist in pumping seawater feedstock towards the Membrane, thus enhancing overall process efficiency and reducing operational costs. The performance of RO desalination varies with changes in feedstock quality. Generally, Reverse Osmosis desalination will operate consistently over a long period if operational parameters (especially feedstock quality) remain constant. Scaling and fouling occur gradually over the lifespan of the Membrane and operational conditions. RO performance analysis can be understood from changes in Recovery Rate, Percent Rejection, Reject Concentration, Flux, and SEC.
The average performance of PT. BBRI SWRO desalination is measured with a Recovery Rate of 36.9% for SWRO-A and 37% for SWRO-B. In terms of rejection capability, the Percent Rejection for SWRO-A is 96.63% and for SWRO-B is 97.03%. There is a possibility of scaling or fouling, leading to the failure to achieve the target of 40% Recovery Rate and 99.5% Percent Rejection. The BWRO-B Membrane performance averages a Recovery Rate of 60.12% with a Percent Rejection of 99%. SWRO units operate at high pressures ranging from 34 to 40 kg/cm2, obtained from HP Pumps and ERD Turbochargers. PT. BBRI utilizes ERD Turbochargers, significantly impacting the reduction in SEC figures. The energy consumption rate per cubic meter of water produced averages 4.05 kWh/m3 for SWRO-A, 3.89 kWh/m3 for SWRO-B, and 0.94 kWh/m3 for BWRO-B.
Key words: Reverse Osmosis, BBRI, SWRO, BWRO, SEC, Performance Analysis

Item Type: Thesis (Masters)
Uncontrolled Keywords: Reverse Osmosis, SWRO, BWRO, PT. BBRI, SEC, Analisa Kinerja
Subjects: Engineering
Divisions: Postgraduate Program > Master Program in Energy
Depositing User: ekana listianawati
Date Deposited: 23 Dec 2024 03:53
Last Modified: 23 Dec 2024 03:53
URI: https://eprints2.undip.ac.id/id/eprint/28282

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