Optimalisasi Kinerja Unit Koagulasi Dan Flokulasi Reaktor Wastewater Treatment Plant (WWTP) Pada PT. XYZ

Nururrochma, Andriana Candra and Ramadhantiya, Nabila Putri (2025) Optimalisasi Kinerja Unit Koagulasi Dan Flokulasi Reaktor Wastewater Treatment Plant (WWTP) Pada PT. XYZ. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

PT. XYZ merupakan industri pupuk yang menghadapi permasalahan yaitu terbentuknya padatan tersuspensi yang terbentuk akibat reaksi dari pencampuran air limbah asam dan basa dalam satu kolam ekualisasi yang dapat meningkatkan nilai Total Suspended Solids (TSS) sehingga berpengaruh pada kinerja proses berikutnya yaitu pada proses koagulasi dan flokulasi. Oleh karena itu, penelitian ini dilakukan untuk untuk mengetahui dosis paling optimal koagulasi dan flokulasi reaktor Wastewater Treatment Plant (WWTP) PT. XYZ dan untuk mengetahui karakteristik cake of waste yang dihasilkan dari proses dewatering dan potensinya untuk dimanfaatkan kembali oleh PT. XYZ. Penelitian ini memvariasikan dosis koagulan Tawas dan flokulan PAM A, serta membandingkannya dengan biokoagulan Biji Kelor pada dua variasi kecepatan pengadukan, yaitu 125/20 rpm (A1) dan 135/30 rpm (A2). Parameter yang diukur sebelum dan sesudah proses koagulasi dan flokulasi meliputi pH, TSS, COD, dan turbidity. Metode untuk menganalisis parameter cake of waste digunakan pengujian analisa organik, anorganik, karakteristik B3, dan uji TCLP. Didapatkan hasil dosis paling optimum pada variasi koagulan Tawas 110 mg/L dan flokulan PAM A 10 mg/L dengan variasi kecepatan pengadukan A1 dengan removal TSS sebesar 74% dan variasi biokoagulan diperoleh pada dosis Biji Kelor 50 mg/L dan flokulan PAM A 10 mg/L dengan variasi kecepatan pengadukan A1 dengan removal TSS sebesar 71%. Sedangkan pada limbah cake of waste, setelah melalui analisa organik, anorganik, karakteristik B3, dan uji TCLP dapat dipastikan aman dan berada dibawah standar regulatory limit sehingga aman untuk dimanfaatkan kembali sebagai material kondisioner.
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PT. XYZ is a fertiliser company that faces a problem, specifically the formation of suspended solids resulting from the reaction between acidic and caustic wastewater in an equalisation tank. This can increase the Total Suspended Solids (TSS) value, thereby affecting the performance of the subsequent process, which is coagulation and flocculation. Therefore, this study was conducted to determine the optimal dose of coagulation and flocculation for the PT XYZ Wastewater Treatment Plant (WWTP) reactor and to determine the characteristics the cake of waste produced from the dewatering process, as well as its potential for reuse by PT XYZ. This study varied the dosage of Tawas coagulant and PAM A flocculant and compared them with Moringa seed biocoagulant at two stirring speeds, 125/20 rpm (A1) and 135/30 rpm (A2). Parameters measured before and after the coagulation and flocculation process include pH, TSS, COD, and turbidity. The method used to analyze the waste cake parameters involved organic and inorganic, B3, and the TCLP (Toxicity Characteristic Leaching Procedure) test. The most optimal dose was obtained at a coagulant variation of 110 mg/L alum and a flocculant variation of 10 mg/L PAM A with a stirring speed variation of A1, achieving TSS removal of 74%. The optimal dosage for the biocoagulant was determined to be 50 mg/L of Moringa seeds and 10 mg/L of PAM A flocculant, with a stirring speed variation of A1, achieving TSS removal of 71%. Meanwhile, for the cake of waste, after undergoing organic and inorganic analysis, B3 characteristics, and TCLP test, it was confirmed to be safe and below regulatory limits, making it safe for reuse as a conditioner material.

Item Type:	Thesis (Other)
Subjects:	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. T Technology > TD Environmental technology. Sanitary engineering > TD767.7 Sewage sludge treatment and disposal T Technology > TD Environmental technology. Sanitary engineering > TD794.5 Recycling (Waste, etc.)
Divisions:	Faculty of Vocational > Industrial Chemical Engineering
Depositing User:	Andriana Candra Nururrochma
Date Deposited:	04 Aug 2025 07:06
Last Modified:	04 Aug 2025 07:06
URI:	http://repository.its.ac.id/id/eprint/125434

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