Kombinasi Proses Elektrodialisis dan Oksidasi Elektrokimia sebagai Alternatif Pra-pengolahan Lindi

Sari, Putu Putri Indira (2017) Kombinasi Proses Elektrodialisis dan Oksidasi Elektrokimia sebagai Alternatif Pra-pengolahan Lindi. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Proses oksidasi elektrokimia pada pengolahan lindi dilakukan untuk menyisihkan polutan organik sedangkan elektrodialisis untuk memisahkan ion-ion positif dan negatif yang dalam hal ini dimanfaatkan untuk recovery nutrien nitrogen (N) dan fosfor (P). Faktor pH berpengaruh pada evolusi persenyawaan klorin sebagai mediator pada oksidasi tidak langsung sedangkan penambahan NaCl bertujuan untuk menyediakan klorin sebagai mediator. Penelitian menggunakan reaktor akrilik dengan anoda karbon dan katoda stainless steel. Reaktor terdiri dari tiga kompartemen yang dipisahkan oleh membran anion dan kation. Pada kompartemen yang terdapat elektroda terjadi penyisihan polutan organik lindi sedangkan pada kompartemen yang berisi aquadest menerima perpindahan ion NH4 dan PO4 . Sistem yang digunakan adalah batch dan dioperasikan selama 12 jam dengan lima titik waktu pengambilan sampel. Elektroda dialiri arus listrik Direct Current (DC) dengan arus 0,25 A. Variasi yang digunakan adalah penambahan NaCl serta variasi pH awal proses yaitu 5,5; pH asli lindi dan 8,5. Analisis parameter utama meliputi COD, TDS, pH, Cl-, NH4 dan total fosfat. Dari keseluruhan uji reaktor, penyisihan massa paling efektif adalah pada variasi penambahan 2 gram NaCl L-1. Penyisihan COD paling tinggi terjadi pada variasi pH Awal Proses 8,5 dan yaitu sebesar 77,93% (0,991 g W-1h-1). Penyisihan TDS paling tinggi pada variasi pH awal proses 5,5 yaitu sebesar 60,30% (0,573 g W-1h-1) dan klorida sebesar (76,86%) 0,701 g W-1h-1. Penyisihan ammonium paling tinggi terjadi pada uji dengan variasi pH asli lindi yaitu sebesar 84,09% (0,466 g W-1h-1) dan untuk total fosfat tercapai pada variasi pH awal proses 8,5 sebesar 90,16% (0,0121 g W-1h-1). ===================================================================== In leachate treatment process electrochemical oxidation was applied to remove organic contaminants meanwhile electrodialysis played role on ionic transfer through membranes in which used as the nutrient (nitrogen and phosporus) recovery. Some factors affecting both processes are including pH, which affects the chlorine evolution to provide oxidizing agent and the amount of chloride ions as the mediator of indirect oxidation. A laboratory-scale electrochemical reactor was designed using commercially available carbon anode and stainless steel cathode to create a triple-chamber reactor separated by anion and cation exchange membranes. Organic pollutants removal took place in leachate compartment with electrodes that provide oxidation meanwhile aquadest compartment received NH4+ and PO43- ions transferred from leachate compartment. The batch processes were performed in 12-hour operational timeat constant supplied current density of 0.25 A and evaluated by means of pH and salinity effects. Different variation of 1 g L-1 , 2 g L-1 and without NaCl addition was applied. pH varied as unadjusted, adjusted to 5.5 and 8.5 in the beginning of each variation. Main parameters analyzed were including COD, TDS, pH, Cl-, NH4+ dan total phosphate. As aresult, operation with the addition of 2 g L-1 gave the best performance in removal efficiency of all parameters. The best COD removal attained 77.93% (0.991 g W-1h-1) at pH 8.5. Removal of 60.30% (0.573 g W-1h-1) TDS and (76.86%) 0.701 g W-1h-1 Cl- was attained at pH 5.5. Removal of amonium reached 84.09% (0.466 g W-1h-1) at the unadjusted pH and 90,16% (0.0121 g W-1h-1) was removed from total phosphate at pH 8.5.

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: elektrodialisis, elektrosorpsi, lindi, oksidasi elektrokimia, nutrien, electrodialysis, electrosorption, electrochemical oxidation, leachate, nutrient
Subjects: T Technology > TD Environmental technology. Sanitary engineering
Divisions: Faculty of Civil Engineering and Planning > Environment Engineering > (S1) Undergraduate Theses
Depositing User: Putu Putri Indira Sari
Date Deposited: 27 Sep 2017 01:09
Last Modified: 06 Mar 2019 03:33
URI: http://repository.its.ac.id/id/eprint/44182

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