Sistem Pengendalian Dosis Zat Koagulan Berbasis Fuzzy Logic Pada Waste Water Treatment Plant Limbah Cair Domestik

Febryanta, PramudityaArjuna Satria (2026) Sistem Pengendalian Dosis Zat Koagulan Berbasis Fuzzy Logic Pada Waste Water Treatment Plant Limbah Cair Domestik. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Pengolahan limbah cair domestik memerlukan sistem pengendalian yang mampu menyesuaikan dosis koagulan secara dinamis sesuai karakteristik air limbah yang berubahubah. Penelitian ini bertujuan untuk merancang dan mengevaluasi sistem pengendalian dosis zat koagulan berbasis fuzzy logic pada wastewater treatment plant (WWTP) limbah cair domestik. Sistem yang dikembangkan terdiri dari unit pengukuran berbasis sensor kekeruhan, pH, Total Dissolved Solids (TDS), dan laju aliran, yang terintegrasi dengan pengendali fuzzy logic untuk menentukan dosis koagulan Poly Aluminium Chloride (PAC) secara otomatis. Hasil validasi menunjukkan bahwa sistem pengukuran memiliki tingkat akurasi yang memadai, dengan rata-rata error sensor kekeruhan sebesar ±5%, sensor pH ±4%, sensor TDS ±3%, dan sensor flowrate ±6% terhadap alat referensi. Penerapan persamaan regresi mampu meningkatkan kesesuaian pembacaan sensor terhadap nilai standar. Sistem fuzzy logic berhasil mengatur dosis koagulan secara adaptif berdasarkan kondisi limbah yang terukur, dengan respons pengendalian yang stabil selama proses berlangsung. Evaluasi performa sistem menunjukkan efektivitas penurunan kekeruhan yang berbeda pada tiap variasi limbah, yaitu sebesar 31,26% pada Limbah 1, 81,96% pada Limbah 2, dan 64,14% pada Limbah 3. Hasil ini menunjukkan bahwa efektivitas sistem paling optimal pada kondisi pH mendekati netral dan beban partikel sedang. Pada parameter TDS terjadi peningkatan masing-masing sebesar 234,08%, 316,02%, dan 67,75%, yang menunjukkan bahwa proses koagulasi lebih efektif menurunkan padatan tersuspensi dibanding zat terlarut. Dengan demikian, sistem pengendalian dosis koagulan berbasis fuzzy logic yang dirancang dinilai layak dan andal sebagai metode pengendalian pada pengolahan limbah cair domestik, meskipun efektivitas akhir tetap dipengaruhi oleh karakteristik awal limbah, khususnya pH dan beban pencemar.
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Domestic wastewater treatment requires a control system capable of adjusting coagulant dosage dynamically according to changing wastewater characteristics. This study aims to design and evaluate a fuzzy logic–based coagulant dosing control system for a domestic wastewater treatment plant (WWTP). The developed system consists of a measurement unit using turbidity, pH, Total Dissolved Solids (TDS), and flow rate sensors integrated with a fuzzy logic controller to automatically determine the dosage of Poly Aluminium Chloride (PAC). The validation results show that the measurement system has adequate accuracy, with average sensor errors of ±5% for turbidity, ±4% for pH, ±3% for TDS, and ±6% for flow rate compared to reference instruments. The application of regression equations improved the agreement between sensor readings and standard values. The fuzzy logic system successfully regulated the coagulant dosage adaptively based on measured wastewater conditions, demonstrating stable control response throughout the treatment process. Performance evaluation indicates different turbidity removal efficiencies for each wastewater variation, namely 31.26% for Wastewater 1, 81.96% for Wastewater 2, and 64.14% for Wastewater 3. These results show that the system performs optimally under near-neutral pH conditions with moderate particle loads. For the TDS parameter, increases of 234.08%, 316.02%, and 67.75% were observed, indicating that the coagulation process is more effective in removing suspended solids than dissolved substances. Therefore, the designed fuzzy logic–based coagulant dosing control system is considered feasible and reliable for domestic wastewater treatment applications, although the final effectiveness remains influenced by the initial wastewater characteristics, particularly pH and pollutant load.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	IPAL, Koagulasi, Sistem Pengendalian Dosis, Fuzzy Logic, Sensor Kekeruhan, pH, dan TDS ============================================================ WWTP, Coagulation and Floculation, Dosing Control System, fuzzy logic, turbidity sensor, TDS sensor and pH sensor
Subjects:	T Technology > TD Environmental technology. Sanitary engineering T Technology > TD Environmental technology. Sanitary engineering > TD375 Turbidity--Measurement. T Technology > TD Environmental technology. Sanitary engineering > TD433 Water treatment plants T Technology > TD Environmental technology. Sanitary engineering > TD455 Chemical precipitation. Coagulation. Flocculation. Water--Purification--Flocculation.
Divisions:	Faculty of Vocational > Instrumentation Engineering
Depositing User:	Pramuditya Arjuna Satria Febryanta
Date Deposited:	04 Feb 2026 00:43
Last Modified:	04 Feb 2026 00:43
URI:	http://repository.its.ac.id/id/eprint/131911

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