[ABSTRAK
40-60% air bersih yang digunkan pada proses pengolahan minyak bumimenjadi limbah cair yang berbahaya bagi lingkungan. Penelitian ini bertujuanmenganalisis efisiensi dan kinetika penyisihan COD, fenol, sulfida, amonia limbahcair industri perminyakan pada pengolahan adsorpsi karbon aktif tempurung kelapadan biofilter serabut kelapa. Air limbah berasal dari PT.Pertamina RU-III. Padapercobaan batch adsorpsi, didapatkan waktu kontak optimum 95 menit dengandosis adsorben 40 g/l serta kinetika penyisihan COD dan fenol yakni kCOD=0,00696g/mg.min dan kfenol=1,243 g/mg.min. Adsorpsi dapat menyisihkan COD 97-48%,fenol 100-56%, amonia 100-71%, sulfida 100-5,15% dalam waktu operasi 235 jam.Sementara itu, pengolahan biofilter dapat menyisihkan COD 52-87%%, fenol 45-99%, amonia 100%, sulfida 100% dengan HLR 3,65 m3/m2.day. Hasil permodelankinetika menunjukkan bahwa HLR berpengaruh pada pengolahan biofilter.Sedangkan pada penggabungan npengolahan adsorpsi-biofilter, biofilter tidakmenunjukkan hasil optimum karena rentang optimal OLR biofilter yaitu 0,4-2,6 kgCOD/m3.day.
ABSTRACT
Approximately 40%-60% of raw water is wasted into wastewater in oilrefinery that can be hazardous to the environment. The purpose of this research wasto analyze the efficiency and kinetic study of COD, phenol, sulfide, ammoniadegradation in refinery wastewater by using coconuts shell activated carbon inadsorption unit and coconut fiber in biofilter unit. Wastewater sample wasconducted from PT.Pertamina RU-III. By the end of research, the optimumcondition of batch adsorption obtained which hit 95 minutes in contact time and 40g/l in adsorption dose. Moreover, the kinetic of COD and phenol degradationconsecutively sat on kCOD=0,00696 g/mg.min and kfenol=1,243 g/mg.min.Furthermore, column adsorption that operated for 235 hours removed 97%-48%ofCOD, 100%-56% of phenol, 100%-71% of ammonia, 100%-5,15% of sulfide. Inaddition, biofilter unit could eliminate 52-87% of COD, 45-99% of phenol, 100%of ammonia and sulfide by using 3,65 m3/m2.day as the HLR. Based on the kinceticmodel, HLR have influence in biofilter COD and phenol removal. However, in thecombination of adsorption and biofilter process, the biofilter unit could not achievethe optimum outcome because the OLR not in the range of 4-2,6 kg COD/ m3.day., Approximately 40%-60% of raw water is wasted into wastewater in oilrefinery that can be hazardous to the environment. The purpose of this research wasto analyze the efficiency and kinetic study of COD, phenol, sulfide, ammoniadegradation in refinery wastewater by using coconuts shell activated carbon inadsorption unit and coconut fiber in biofilter unit. Wastewater sample wasconducted from PT.Pertamina RU-III. By the end of research, the optimumcondition of batch adsorption obtained which hit 95 minutes in contact time and 40g/l in adsorption dose. Moreover, the kinetic of COD and phenol degradationconsecutively sat on kCOD=0,00696 g/mg.min and kfenol=1,243 g/mg.min.Furthermore, column adsorption that operated for 235 hours removed 97%-48%ofCOD, 100%-56% of phenol, 100%-71% of ammonia, 100%-5,15% of sulfide. Inaddition, biofilter unit could eliminate 52-87% of COD, 45-99% of phenol, 100%of ammonia and sulfide by using 3,65 m3/m2.day as the HLR. Based on the kinceticmodel, HLR have influence in biofilter COD and phenol removal. However, in thecombination of adsorption and biofilter process, the biofilter unit could not achievethe optimum outcome because the OLR not in the range of 4-2,6 kg COD/ m3.day.] |
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