Pengaruh Proses Aerasi Dan Pre-Klorinasi Terhadap Kinerja Koagulasi Dan Flokulasi

Manah, Suluh Parameswari Hayuning (2022) Pengaruh Proses Aerasi Dan Pre-Klorinasi Terhadap Kinerja Koagulasi Dan Flokulasi. Other thesis, Institut Teknologi Sepuluh Nopember.

Text 03211840000110-Undergraduate_Thesis.pdf Download (4MB)

Abstract

Proses aerasi dapat membantu meningkatkan dissolved oxygen di dalam pengolahan air sehingga dapat menambah bakteri untuk dekomposisi kimia. Selain itu terdapat proses pre�klorinasi yang juga dapat membantu peningkatan oksigen di dalam air. Namun, tidak semua pengolahan air minum menerapkan proses aerasi dan pre-klorinasi sebagai pengolahan awal walaupun parameter air baku yang dipakai memiliki karakteristik air yang sama. Belum terdapat penelitian yang membahas mengenai pengaruh proses aerasi dan pre-klorinasi terhadap unit setelahnya yaitu koagulasi dan flokulasi. Sehingga, penelitian ini dilakukan untuk mengetahui pengaruh proses aerasi terhadap efisiensi proses koagulasi dan flokulasi. Penelitian ini juga dilakukan untuk mengetahui pengaruh pre-klorinasi terhadap kelarutan oksigen dan efisiensi terhadap proses koagulasi dan flokulasi. Sampel air sebanyak 30 L/hari diambil dari intake PDAM Surya Sembada IPAM II Karang Pilang. Sampel air diambil pada kondisi cuaca cerah dan tidak hujan. Sampel air selanjutnya dilakukan proses aerasi menggunakan aerator (air pump aerator) dengan debit 4,3 L/menit. Air sampel dilakukan proses aerasi dengan 3 variasi lama waktu injeksi yang berbeda. Variasi lainnya adalah dengan menambahkan klorin berupa kaporit saat air sampel diinjeksikan oksigen. Selanjutnya, dilakukan pengukuran jar test dengan koagulan PAC 1%. Pengukuran dengan jar test dilakukan untuk mengetahui kinerja koagulasi dan flokulasi berdasarkan konsentrasi koagulan. Sebelum dan sesudah percobaan, dilakukan pengujian air sampel berupa pengujian parameter dissolved oxygen (DO), biochemical oxygen demand (BOD), chemical oxygen demand (COD), total suspended solid (TSS), kekeruhan, amonium, nitrit, dan nitrat. Hasil penelitian menunjukkan bahwa pada aerasi selama 70 menit dengan dosis koagulan 25 mg/L tanpa pre-klorinasi dapat menurunkan BOD 36%, COD 31%, TSS 75%, kekeruhan 93%, nitrat 13%, nitrit 55%, dan amonium 44%. Sedangkan aerasi selama 70 menit dan dosis koagulan 25 mg/L dengan proses pre-klorinasi dapat menurunkan 41% BOD, 57% COD, 84% TSS, 89% kekeruhan, 58% nitrit, 26% amonium dan 38% nitrat. Jika dibandingkan, hasil penambahan kaporit menambah efisiensi penurunan parameter dengan dosis koagulan dan lama
waktu aerasi yang sama.
===============================================================================================================================
Aeration process can help increase dissolved oxygen in water treatment. This process can add more bacteria for chemical decomposition. In addition, there is a prechlorination
process that can also help increase oxygen in the water. However, not all drinking water treatment implements aeration and prechlorination processes as initial treatment, even though the raw water parameters used have the same water characteristics. There is no research that discusses the effect of aeration and prechlorination processes on the unit coagulation and flocculation. Therefore, this study was conducted to determine the effect of the aeration process on the efficiency of the coagulation and flocculation processes. This research was also conducted to determine the effect of prechlorination on oxygen solubility and efficiency on coagulation and flocculation processes.
Water samples of 30 L/day were taken from the intake of PDAM Surya Sembada IPAM II Karang Pilang. Water samples were taken in bright weather conditions. After that, water samples were aerated using an aerator (air pump aerator) with a flow rate of 4.3 L/min. The sample water was aerated with 3 different injection time variations. Another variation is to add chlorine when oxygen is injected into the water sample. Next, the jar test was measured with 1% PAC coagulant. Measurements with the jar test were carried out to determine the performance of coagulation and flocculation based on the concentration of coagulant. Before and after the experiment, water samples were tested of parameters including dissolved oxygen (DO), biochemical oxygen demand (BOD), chemical oxygen demand (COD), total suspended solid (TSS), turbidity, ammonium, nitrite, dan nitrate. The results showed that aeration for 70 minutes with a coagulant dose of 25 mg/L without prechlorination could reduce 36% of BOD, 31% of COD, 75% of TSS, 93% of
Turbidity, 13% of nitrate, 55% of nitrite, and 44% of ammonium. While aeration for 70 minutes and coagulant dose of 30 mg/L with prechlorination process can reduce 41% of BOD, 57% of COD, 84% of TSS, 89% of turbidity, 58% of nitrite, 26% of ammonium and 38% of nitrate. Compared to the result, pre-chlorination process increases efficiency of parameter reduction with the same doses of coagulant and aeration time

Item Type:	Thesis (Other)
Additional Information:	RSL 628.167 Man p-1 2022
Uncontrolled Keywords:	Aerasi, Flokulasi, Jar Test, Koagulasi, Pre-klorinasi, Aeration, Flocculation, Jar Test, Coagulation, Prechlorination
Subjects:	T Technology > TD Environmental technology. Sanitary engineering > TD479.3 Saline water conversion
Divisions:	Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Environmental Engineering > 25201-(S1) Undergraduate Thesis
Depositing User:	Mr. Marsudiyana -
Date Deposited:	09 Dec 2024 06:55
Last Modified:	09 Dec 2024 06:55
URI:	http://repository.its.ac.id/id/eprint/115926

Actions (login required)

View Item