Instalasi Pengolahan Air Limbah (IPAL) pada industri penyamakan kulit sudah dibuat oleh satu industri. Adapun sebanyak 52 industri lainnya belum memiliki IPAL. Air limbah yang dihasilkan oleh 52 industri tersebut dibuang langsung ke Sungai Ciwalen dan Cigulampeng sehingga menyebabkan pencemaran. Penyelesaian terhadap masalah itu dilakukan dengan perencanaan IPAL Komunal untuk menanggulangi pencemaran di Sungai Ciwalen dan Cigulampeng. Tujuan Tugas Akhir ini, membuat perencanaan IPAL Komunal, dan menghitung estimasi biaya pembangunan serta operasional IPAL Komunal. Landasan perencanaan yang digunakan adalah Basic Design Consideration dari teori Waste Water Treatment Plan yang meliputi pertimbangan terhadap area pelayanan, desain populasi, karakteristik air limbah, proses pengolahan dan peralatan yang digunakan. Dalam perencanaan ini data diperoleh dari dua sumber, yaitu data primer dan data sekunder. Data primer seperti jumlah industri, luas kawasan industri, dan industri yang telah memiliki IPAL. Data Sekunder seperti peta lokasi kawasan industri, debit air limbah industri per hari, karakteristik air limbah industri, dan jumlah pertumbuhan produksi industri. Perencanaan IPAL ini, meliputi: rencana area pelayanan dapat melayani 52 industri penyamakan kulit. Rencana desain populasi dapat melayani pengolahan air limbah hingga 15 tahun ke depan sesuai dengan pertumbuhan produksi yang ada. Berdasarkan data pertumbuhan produksi industri yang ada, debit air limbah mengalami peningkatan secara berkala sehingga pembangunan IPAL bisa direncanakan menjadi 3 tahap per 5 tahun. Tahap I dengan kapasitas 28.3333 m3 per hari, tahap II dengan kapasitas 9.430 m3 per hari, dan tahap III dengan kapasitas 9.430 m3 per hari. Rencana karakteristik air limbah yang akan diolah terdiri dari 560 mg/L TSS, 3500 mg/L BOD, 1800 mg/L COD, 30 mg/L Ammonia Total, 40 mg/L Crom Total, dan 14,8 mg/L Sulfida. Rencana proses pengolahan air limbah yang digunakan terdiri dari proses pengolahan secara fisika, kimia, dan biologi. Rencana peralatan yang digunakan terdiri dari bak ekualisasi, bak koagulasi dan flokulasi, bak sedimenasi awal, bak aerasi, bak sedimentasi akhir, dan bak desinfektan. Estimasi biaya yang dibutuhkan untuk pembangunan dan operasional IPAL. Biaya pembangunan IPAL tahap I sebesar Rp. 15.959.986.462,-, tahap II sebesar Rp.6.087.025.782,-, dan tahap III sebesar Rp.7.489.380.475,-. Adapun estimasi biaya operasional IPAL tahap I sebesar Rp. 86.869.034.190,-, tahap II sebesar Rp. 24.149.813.865,- dan tahap III sebesar Rp. 14.230.673.356,-. Rekapitulasi dari biaya pembangunan dan operasional IPAL tahap I, II, dan III sebesar Rp. 154.785.914.130,-. Kata Kunci: Perencanaan IPAL, Instalasi Pengolahan Air Limbah (IPAL), Estimasi Biaya Pembangunan, Biaya Operasional.

Waste Water Treatment Plant (WWTP) in leather tanning industries has made by one industry, while 52 other industries don't have WWTP yet. The waste water produced by these 52 industries was dumped directly into the Ciwalen and Cigulampeng Rivers that causing pollution. The solution to the problem is by planning the WWTP to overcome pollution in the Ciwalen and Cigulampeng Rivers. The purpose of this final project is to plan the WWTP and calculate the estimated development and operational costs of the WWTP. Planning theory used in this research is the Basic Design Consideration from the theory of the Waste Water Treatment Plan which includes consideration of service areas, population design, characteristics of wastewater, and processing and equipment. This research data was obtained from two sources, namely primary and secondary data. Primary data consists of the number of industries, the area of industrial estates, and industries that already have WWTP. Secondary data consists of maps of the location of industrial estates, industrial waste water discharge per day, characteristics of industrial waste water, and the amount of growth in industrial production. The result of this project is the planning for the service area that included 52 tannery industries. The planned waste water discharge is 47,190 m3 per day which is projected for the next 15 years. Based on the growth of existing industrial production data, the discharge of wastewater has increased periodically so that the construction of WWTP can be planned into 3 phases per 5 years. The construction cost of Phase I with a capacity of 28,333 m3 per day, phase II with a capacity of 9,430 m3 per day, and Phase III with a capacity of 9,430 m3 per day. The planned characteristics of wastewater that will be processed including 140 mg/L TSS, 3 pH, 2.100 mg/L BOD, 1.260 mg/L COD, 30 mg/L Ammonia total, 0,4 mg/L Crom total dan 14,8 mg/L Sulfide. The planned of processing that will be used includes processing in physical, chemical and biological. The planned of equipment that will be used consists of equalization tank equipment, such as coagulation and flocculation tank, initial sedimentation tank, aeration tank, final sedimentation tank, and disinfectant tank. The results of the estimated that needs for the IPAL development and operational, Phase I is Rp. 15.959.986.462-, phase II is Rp. 6.087.025.782,-, and phase III is Rp.7.489.380.475. The results of the estimated operational costs of WWTP’s Phase I is Rp. 86.869.034.190, -, phase II is Rp. 24.149.813.865,-, and Phase III is Rp. 14.230.673.356,-. The recapitulation of the construction and operational costs of WWTP phase I, II, and III is Rp. 154.785.914.130,-. Keywords: WWTP Planning, Waste Water Treatment Plant (WWTP), Estimated Development and Operational Costs.

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