Anes, Mahdiyah (2019) Optimasi Dosis dan Kecepatan pada Proses Koagulasi-Flokulasi Lindi TPA Benowo Menggunakan Poly Aluminium Clhoride dan Kitosan dengan Response Surface Methodology Design Box Behnken. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
TPA Benowo memiliki lindi dengan kandungan organik yang tinggi. Hal tersebut mengakibatkan mikroorganisme sulit mendegradasi sampah pada kondisi rasio BOD/COD <0,4. Metode yang dapat digunakan untuk mengurangi beban organik dengan menggunakan pengolahan koagulasi flokulasi yang dioptimalisasi menggunakan RSM (Response Surface Methodology) dengan desain Box Behnken. Penelitian ini bertujuan untuk menentukan efisiensi penyisihan salinitas, TSS, COD, BOD5 dan kadmium dan menentukan dosis dan kecepatan optimasi pada proses koagulasi-flokulasi dengan menggunakan RSM design Box Behnken. Penelitian ini menggunakan variasi yaitu konsentasi koagulan PAC, konsentrasi flokulan kitosan, kecepatan koagulasi dan kecepatan flokulasi. Data dimasukan ke dalam Software Design Expert 6.0.10 RSM design Box-Behnken berupa dosis rentang berdasarkan penelitian di laboratorium dan kecepatan berdasarkan perhitungan G.td. Parameter uji yang dianalisis adalah salinitas, TSS, COD, BOD5 dan kadmium. Metode yang digunakan untuk mengukur salinitas adalah Potensiometri, TSS adalah metode Gravimetri, COD adalah Closed Reflux, BOD adalah metode Winkler, dan Cd adalah metode Spektrofotometri Serapan Atom (SSA)-nyala. Keuntungan menggunakan RSM design Box Behnken adalah mencapai prediksi yang baik dengan paling sedikit percobaan yang diperlukan. Hasil penentuan rentang dosis menunjukan koagulan PAC menurukan COD, TSS dan kekeruhan pada range 2200 mg/L-2400 mg/L. Range flokulan kitosan antara 350 mg/L- 400 mg/L. Efesiensi COD, TSS dan kekeruhan pada dosis koagulan PAC 2400 mg/L dengan 350 mg/L flokulan kitosan yaitu 71%, 45%, dan 94%. Konsentrasi salinitas dari 6,4 ppt menjadi 7,82 ppt yang termasuk salinitas rendah. Kadar Cd sudah memenuhi baku mutu sehingga tidak dilakukan pengujian. Berdasarkan Software Design Expert 6.0.10 didapatkan dosis optimum dengan dosis PAC 2400 mg/L, dosis kitosan 350 mg/L dan memiliki kecepatan koagulasi 279,13 rpm serta flokulasi 60 rpm.
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Benowo Landfill produces leachate with high organic content. This makes it difficult for microorganisms to degrade solid waste under conditions where the BOD/COD ratio is <0.4. One of the methods that can be used to reduce the organic load is the coagulation-flocculation process, which can be optimized using Response Surface Methodology (RSM) with a Box-Behnken design. This study aims to determine the removal efficiency of salinity, TSS, COD, BOD₅, and cadmium concentrations, as well as to determine the optimum dose and mixing speed in the coagulation-flocculation process using the RSM Box-Behnken design. The variables used in this study are PAC coagulant concentration, chitosan flocculant concentration, coagulation speed, and flocculation speed. Data were entered into Design Expert Software 6.0.10 using the RSM Box-Behnken design in the form of dosage variations based on laboratory research and speed variations based on G·td calculations. The parameters analyzed were salinity, TSS, COD, BOD₅, and cadmium concentrations. The analytical methods used were potentiometry for salinity, the gravimetric method for TSS, the closed reflux method for COD, the Winkler method for BOD, and Atomic Absorption Spectrophotometry (AAS) for cadmium. The advantage of using the RSM Box-Behnken design is that it achieves good predictions with a relatively small number of experimental trials. The results showed that the PAC coagulant dosage range of 2200–2400 mg/L was able to reduce COD, TSS, and turbidity. The optimum chitosan flocculant dosage ranged from 350–400 mg/L. The removal efficiencies of COD, TSS, and turbidity using a PAC dose of 2400 mg/L and a chitosan dose of 350 mg/L were 71%, 45%, and 94%, respectively. Salinity concentrations ranged from 6.4 ppt to 7.82 ppt, which is classified as low salinity. The cadmium concentration had already met the quality standard and therefore was not further tested. Based on Design Expert Software 6.0.10, the optimum operating conditions were a PAC dose of 2400 mg/L, a chitosan dose of 350 mg/L, a coagulation speed of 279.13 rpm, and a flocculation speed of 60 rpm.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | koagulasi flokulasi, kitosan, lindi, PAC, RSM |
| Subjects: | T Technology > TD Environmental technology. Sanitary engineering > TD455 Chemical precipitation. Coagulation. Flocculation. Water--Purification--Flocculation. |
| Divisions: | Faculty of Civil, Environmental, and Geo Engineering > Environmental Engineering > 25201-(S1) Undergraduate Theses |
| Depositing User: | Mahdiyah Anes |
| Date Deposited: | 01 Oct 2024 06:52 |
| Last Modified: | 22 Jul 2026 06:14 |
| URI: | http://repository.its.ac.id/id/eprint/66224 |
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