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"Hasil pemeriksaan limbah cair yang dilakukan pada bulan Agustus tahun 2016, titik inlet dan outlet menunjukan kesenjangan hasil dimana hasil pemeriksaan di titik outlet lebih besar dari pada titik inlet untuk parameter TDS, TSS, pH, COD dan MBAS. Tujuan dari penelitian ini adalah menganalisi efektifitas pengolahan limbah cair di Rumah Sakit Harapan Depok memenuhi baku mutu limbah cair tahun 2017. Dengan penelitian ini bersifat studi kasus.Sumber penghasil Limbah cair Rumah Sakit Harapan Depok terbesar berasal dari seluruh aktifitas kegiatan di rumah sakit, jenis dan sumber terbesar air limbah yang dihasilkan di Rumah Sakit adalah limbah domestik, sisanya limbah yang terkontaminasi oleh infection agents kultur mikroorganisme, darah, buangan pasien pengidap penyakit infeksi, dan lain-lain. Debit output limbah cair rata-rata yang dihasilkan 3 m3/hari. Jaringan perpiaan yang digunakan sebagian terbuat dari pipa PVC sebagian terbuat dari beton yang masih terbuka. Proses pengolahan limbah cair di Rumah Sakit Harapan Depok melalui 3 proses pengolahan yaitu pengolahan pendahuluan pre treatment, pengolahan pertama primary treatment, pengolahan kedua secondary treatment, pengolahan ketiga tertiary treatment.Berdasarkan perhitungan waktu tinggal diperoleh hasil yang belum efektif yaitu pada bak equalisasi didapatakan hasil 35,87 jam dengan kedalam bak ekualisasi 1,5 m. Pada bak sedimentasi belum efektif dalam menurunan kadar pencemar yaitu BOD 0,49 dan TSS 0,95 dengan waktu tinggal 41,6 jam. Kualitas inffluent dan effluent limbah cair dari hasil pemeriksaan sudah efektif dalam menurunkan beban pencemaran limbah cair sesuai dengan baku mutu yang dipersyarat KepMen LH RI No. 5 tahun 2014 tentang Baku Mutu Air Limbah Bagi Usaha dan/atau Kegiatan Fasilitas Pelayanan Kesehatan.

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The results of the wastewater tests conducted in August 2016, the inlet and outlet sampling points indicate the results gap in which the checkout results at the outlet point is greater than the inlet point for TDS, TSS, pH, COD and MBAS parameters.This research aims to analyze effectivity of wastewater treatment plan at Harapan Depok Hospital fulfill wastewater quality standard in 2017. With this research is case study.

The largest source of wastewater from Harapan Depok Hospital comes from all activities in the hospital, the type and largest source of wastewater produced in the hospital is domestic waste, the rest of the waste contaminated by the infection agents culture of microorganisms, blood, diseases of patients with infectious diseases, and others. The average liquid waste discharge output produced 3 m3 day. The partial used network made of PVC pipe is partly made of open concrete. Wastewater treatment process at Harapan Hospital Depok through 3 processing process that is pre treatment, primary treatment, secondary treatment, tertiary treatment.

Based on the calculation of residence time obtained results that have not been effective in equalization obtained results 35.87 hours with 1.5 m in equalization basin. In the sedimentation has not been effective in decreasing levels of pollutants ie BOD 0.49 and TSS 0.95 with a residence time of 41.6 hours. The quality of inffluent and effluent of wastewater from the result of inspection has been effective in decreasing the burden of pollution of wastewater in accordance with the quality standard which is signed by Minister of Environment Decree of the Republic of Indonesia number 5 2014 on Quality Standard of Waste Water for Business and or Activity of Health Service Facility."

"Telah dilaporkan bahwa kinerja pengolahan di kolam fakultatif di Instalasi Pengolahan Air Kotor (IPAK) Bojongsoang adalah tidak stabil. Salah satu penyebabnya adalah karakteristik hidrodinamika yang tidak sesuai dengan criteria. Yang termasuk dalam karakteristik hidrodinamika yang tidak tepat antara lain kehadiran daerah mati, aliran pendek, dan turbulensi oleh arus eddy. Penelitian ini bertujuan untuk menganalisa pengaruh variasi debit influen terhadap karakteristik hidrodinamika menggunakan model matematis. Model hidrodinamika dua dimensi dibangun dari dua persamaan hidrodinamika, yaitu persamaan kontinuitas dan persamaan momentum. Kedua persamaan diselesaikan dengan metoda numerik beda hingga semi implisit (Crank-Nicolson). Dari hasil simulasi, dianalisa nilai bilangan Froude aliran serta waktu tinggal efektif dan luas efektif kolam fakultatif untuk melihat kehadiran daerah mati.Hasil simulasi menunjukkan bahwa daerah mati terdapat di tengah kolam. Apabila debit influen semakin besar, waktu tinggal efektif dan luas efektif semakin besar. Selain itu, distribusi nilai bilangan Froude menunjukkan bahwa nilai 10-10 semakin berkurang bila debit influen semakin besar. Dapat dikatakan bahwa daerah mati akan berkurang pada debit influen yang lebih besar. Dengan demikian debit influen yang semakin besar akan memperbaiki karakteristik hidrodinamika di kolam fakultatif.

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The Effects of Influent Debit on Hydrodynamic Characteristic of Bojongsoang Facultative Pond: Without Wind Effects. The performance of facultative pond in Bojongsoang WWTP have reported to be unstable. One of the cause of the unstable performance is the hydrodynamic characteristics that not met the criterion. The improper hydrodynamic characteristics are included the existence of dead-zone, the short-circuiting, and the turbulence due to eddy current. The study was to analyze the effect of the influent debit variation on the hydrodynamic characteristics of the pond using mathematical model. The two-dimensional hydrodynamic model was built from two hydrodynamic equations which are continuity and momentum equations. The equations were solved by finite-difference numerical method of semi-implicit (Crank-Nicolson).From the simulation results, the Froude number of the water flow was analyzed. Beside that, the effective residence time and the effective area were calculated. All of them were done to analyzed the existence of the dead-zone in the pond. The simulation results show that the dead-zone was exist in the center of the pond. when the influent debit was larger, the effective residence time and the effective area become larger. The distribution of the Froude number value shows that the area with the value of 10-10 become reduced in the larger influent debit. The existence of the dead-zone was reduced since the influent debit become larger. It can be said that the larger influent debit can improve the hydrodynamic characteristics of the pond."