Rachman, Rahadian Abdul (2024) Kinerja Peroksodisulfat Teraktivasi Fe2+ Sebagai Agen Kimia Pembersih Membran PVDF Serat Berongga Pada Aplikasi Membran Bioreaktor. Masters thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Pencucian membran PVDF dengan bahan kimia NH4S2O8 dengan FeSO4.7H2O, NaOCl, dan NaOH telah berhasil dilakukan. Pada penelitian ini, material membran PVDF baru diuji mikrofiltrasi dengan umpan air murni, kemudian membran diuji mikrofiltrasi dengan umpan COD sebesar 3,2 kgCOD/m3 hari dan padatan tersuspensi sebesar ±8000 mg/L. Selanjutnya,membran dilakukan pencucian dengan bahan kimia NH4S2O8 dengan FeSO4.7H2O, NaOCl, dan NaOH dan diuji kembali dengan umpan air murni. Langkah-langkah eksperimen yang telah dilakukan analisa berupa Flux Recovery Ratio (FRR), Irrversible Fouling Ratio (IFR), rejeksi TSS dan COD, kinetika pembersihan pengotor pada membran, nilai energi pembersihan pengotor pada membran melalui persamaan Arrhenius, nilai entalpi (ΔH#), entropi (ΔS#), dan energi bebas Gibbs (ΔG#) melalui persamaan Eyring polanyi. Membran dengan PDS/Fe2+ memiliki nilai rasio pemulihan fluks lebih besar (T= 298K; FRR= 86,52% - 88,45%, T= 303K; FRR= 90,09% - 94,19%, dan T= 308K; FRR= 96,10% - 99,04%) jika dibandingkan dengan NaOCl (T= 298K; FRR= 74,41%, T= 303K; FRR= 78,67%, T= 308K; FRR= 84,41%) dan NaOH (T= 298K; FRR= 69,81%, T= 303K; FRR= 72,99%, T= 308K; FRR= 75,44%). Akan tetapi, membran dengan PDS/Fe2+ memiliki nilai IFR lebih kecil (T= 298K; IFR= 13,48% - 11,55%, T= 303K; IFR= 9,91% - 5,80%, dan T= 308K; IFR = 3,90% - 0,96%) jika dibandingkan dengan NaOH (T= 298K; IFR = 30,19%, T= 303K; IFR= 27%, T= 308K; IFR=24,56%) dan NaOCl (T= 298K; IFR= 25,59%, T= 303K; IFR= 21,33%, T= 308K; IFR= 15,59%). Model penyumbatan pengotor pada membran mengikuti tipe penyumbatan intermediat dan cake filtration dengan mengikuti korelasi R2 yang tertinggi. Kinetika pembersihan pengotor pada membran mengikuti difusi lapisan membran dengan mengikuti korelasi R2 yang tertinggi. Kemudian energi yang dibutuhkan untuk pembersihan pengotor pada membran dengan PDS/Fe2+ lebih kecil (Ea= 7,96 – 9,84kJ/mol) jika dibandingkan dengan NaOCl (Ea= 11,96 kJ/mol) dan NaOH (Ea= 12,42 kJ/mol). Nilai entalpi (ΔH#) bernilai positif yang menandakan reaksi bersifat endotermis. Nilai entropi (ΔS#) bernilai positif yang menandakan peningkatan ketidakteraturan selama proses pembersihan. Nilai energi bebas Gibbs (ΔG#) yang didapatkan pada penelitian ini bernilai negatif, yang menunjukkan proses pembersihan membran secara kimia berlangsung secara spontan
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Cleaning the PVDF membrane with the chemical NH4S2O8/ FeSO4.7H2O, NaOCl, and NaOH has been successfully carried out. In this study, the new PVDF membrane material was subjected to a microfiltration test using pure water as feed, then the membrane was tested for microfiltration with a COD feed of 3.2 kgCOD/m3 day, suspended solids of ±8000 mgSS/L. Next, the membrane was washed with the chemicals NH4S2O8 with FeSO4.7H2O, NaOCl, and NaOH, and tested again with pure water feed again. The experimental steps that have been carried out have been analyzed which obtained data such as Flux Recovery Ratio (FRR), Irrversible Fouling Ratio (IFR), TSS and COD rejection, impurity cleaning kinetics on the membrane, energy value of impurity cleaning on the membrane using the Arrhenius equation, enthalpy value (ΔH# ), entropy (ΔS# ), and Gibbs free energy (ΔG# ) via the Eyring Polanyi equation. PDS/Fe2+ membrane had larger flux recovery ratio value (T= 298K; FRR= 86.52% - 88.45%, T= 303K; FRR= 90.09% - 94.19%, and T= 308K ; FRR= 96.10% - 99.04%) compared with NaOCl (T= 298K; FRR= 74.41%, T= 303K; FRR= 78.67%, T= 308K; FRR= 84, 41%) and NaOH (T= 298K; FRR= 69.81%, T= 303K; FRR= 72.99%, T= 308K; FRR= 75.44%). However, PDS/Fe2+ membrane had smaller IFR values (T= 298K; IFR= 13.48% - 11.55%, T= 303K; IFR= 9.91% - 5.80%, and T= 308K; IFR = 3.90% - 0.96%) compared with the NaOH (T= 298K; IFR = 30.19%, T= 303K; IFR= 27%, T= 308K; IFR= 24.56%) and NaOCl (T= 298K; IFR= 25.59%, T= 303K; IFR= 21.33%, T= 308K; IFR= 15.59%). The impurity blockage model in the membrane followed the intermediate and cake filtration blockage types by following the highest R2 correlation. The kinetics of impurity removal in the membrane followed reaction of ash diffusion with the highest R2 correlation. Then the energy required to clean impurities on the membrane with the chemical PDS/Fe2+ was smaller (Ea= 7.96 – 9.84 kJ/mol) compared with NaOCl (Ea= 11.96 kJ/mol) and NaOH (Ea= 12.42 kJ/mol). The enthalpy value (ΔH# ) was positive which indicated the reaction is endothermic. The entropy value (ΔS# ) was positive which indicated an increase in disorder during the cleaning process. The Gibbs free energy value (ΔG# ) obtained in this study was negative, which mean the chemical membrane cleaning process takes place spontaneously.
| Item Type: | Thesis (Masters) |
|---|---|
| Uncontrolled Keywords: | Membran bioreaktor, Penyumbatan, Pemulihan fluks, Sulfat radikal. |
| Subjects: | T Technology > TP Chemical technology > TP159.M4 Membranes (Technology) T Technology > TP Chemical technology > TP248.25.M45 Membrane reactors T Technology > TP Chemical technology > TP894 Bleaching, cleaning, scouring |
| Divisions: | Faculty of Science and Data Analytics (SCIENTICS) > Chemistry > 47101-(S2) Master Thesis |
| Depositing User: | Rahadian Abdul Rachman |
| Date Deposited: | 19 Jul 2024 04:07 |
| Last Modified: | 19 Jul 2024 06:37 |
| URI: | http://repository.its.ac.id/id/eprint/108492 |
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