Sidik, Fahrudin (2019) Proses Elektrokimia Menggunakan Anoda Platina(Pt) dan Aluminium(Al) untuk Pengolahan Awal Lindi. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Keberadaan amonium dan senyawa organik yang tinggi pada pengolahan lindi secara biologis akan mempengaruhi efisiensi pengolahan. Pengolahan secara elektrokimia merupakan pengolahan fisik-kimia yang dapat menurunkan amonium dan polutan organik pada lindi. Beberapa faktor yang mempengaruhi pengolahan adalah jenis anoda yang digunakan, pH operasi, dan kuat arus. Anoda Platina (Pt) dapat mengoksidasi zat organik dengan proses oksidasi langsung dan oksidasi tidak langsung. Anoda Aluminium (Al) memiliki kemampuan untuk menghasilkan oksida logam sebagai koagulan dan dapat mendestabilisasi polutan pada lindi melalui mekanisme elektrokoagulasi. Tujuan penelitian ini adalah mengetahui pengaruh pH operasi, penggunaan anoda Pt dan Al, serta kuat arus terhadap efisiensi penurunan amonium dan polutan organik menggunakan proses elektrokimia. Efisiensi pengolahan dapat dinilai berdasarkan tingkat penyisihan amonium, COD, BOD, dan konsumsi energi spesifik (kWh.g-1). Penelitian ini dilakukan dalam skala laboratorium menggunakan reaktor elektrokimia tiga kompartemen dengan volume efektif 576 mL. Kompartemen tengah merupakan kompartemen recovery yang berisi akuades dengan larutan buffer fosfat. Menggunakan membran tipe Catode Exchange Membrane (CEM) dan Anode Exchange Membrane (AEM). Elektroda yang digunakan adalah Pt dan Al sebagai anoda dengan ukuran 3 cm x 8 cm serta katoda Stainless Steel (SS) berukuran 3 cm x 8 cm. Volume lindi yang diolah adalah 5 Liter dengan sistem batch recirculation selama 6 jam operasi pada debit 5 mL.detik-1. Variasi pH operasi dijaga pada pH 4, pH 6, dan pH 8, serta menggunakan kuat arus 500 mA dan 700 mA. Parameter yang dianalisis adalah Chemical Oxygen Demand (COD), Biochemical Oxygen Demand (BOD), Amonium, Total Kjedahl Nitrogen (TKN), pH, dan Total Dissolved Solid (TDS) dan nitrat. Hasil penelitian menunjukan bahwa proses penyisihan polutan organik dan amonium tertinggi untuk anoda aluminium adalah pada variasi pH 6 arus 700 mA dengan penyisihan COD sebesar 75% (5,01 g; 0,52 kWh.g-1), penyisihan amonium yaitu 69% (0,604 g; 0,182 kWh.g-1). Dengan anoda platina dicapai pada variasi pH 4 arus 500 mA dengan penyisihan COD sebesar 29% (1,89 g; 0,008 kWh.g-1). Penyisihan amonium sebesar 36%
(0,306 g; 0,073 kWh.g-1)
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The presence of high ammonium and organics in leachate will affect the treatment efficiency. Electrochemical treatment is a physico-cemical treatment potentially effective for removal of these substances. The treatment efficiency depends on several factors, such as anodes material, operational pH, and current. Platinum (Pt) anode can oxidize organic substance by direct and indirect oxidation, while aluminum (Al) anode can remove pollutants by electrocoagulation. This experiment aimed to investigate the effect of operational pH, anode materials (Pt for electrooxidation, Al for electrocoagulation), and electrical current on the removal of ammonium and organics substance using electrochemical process. The treatment efficiency was evaluated based on the removal of ammonium, COD, and BOD as well as the specific energy consumption. This study was conducted on a laboratory scale using a 576 mL. Electrochemical reactor consist of three compartments. The middle compartment served as recovery compartment, which was filled with the phosphate buffer solution. Each compartment was seperated by anion exchange membrane (AEM) and cation exchange membrane (CEM). The anode (Pt or Al with the area of 24 cm2) and cathode (SS with the same area) were separated 2 cm away. Each experiment treated a 5 L leachate sample, recirculated at a flow rate of 5 mL.s-1 for 6 hours. The operational pH was kept constant at 4, 6, and 8. The current applied were 500 mA and 700 mA. Periodically drawn samples were analyzed for chemical oxygen demand (COD), biochemical oxygen demand (BOD), ammonium, total Kjeldahl nitrogen (TKN), pH, nitrate, and total dissolved solids (TDS). The results showed that when using Al anode, i.e. electrocoagulation process, under the operational pH of 6 and current applied of 700 mA, the highest COD and NH4-N removal efficiencies of 5,01 g (0,052 kWh.g-1) and 0,604 g (0,182 kWh.g-1), respectively, were achieved. Using Pt anode, i.e. electrooxidation process, the highest COD and NH4-N removal were 1,89 g (0,008 kWh.g-1) and 0,306 g (0,073 kWh.g-1), respectively, and was achieved when operational pH was 4 and current applied was 500 mA.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Al Anode, Current, Leachate, pH Operation, Pt anode |
| Subjects: | T Technology > TD Environmental technology. Sanitary engineering > TD795.7 Sanitary landfills. Leachate--Purification. |
| Divisions: | Faculty of Civil Engineering and Planning > Environment Engineering > 25201-(S1) Undergraduate Thesis |
| Depositing User: | fahrudin sidik |
| Date Deposited: | 18 Jul 2024 03:40 |
| Last Modified: | 18 Jul 2024 03:40 |
| URI: | http://repository.its.ac.id/id/eprint/66434 |
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