Penggunaan Filtrasi dan Sinar Ultraviolet dalam Menurunkan Total Coliform pada Air Buangan Proses Water Bath

Abstract

Air buangan proses water bath dalam industri kemasan plastik fleksibel mengandung cemaran mikrobiologis berupa bakteri coliform yang melebihi ambang batas baku mutu air menurut Permenkes No. 2 Tahun 2023. Kandungan bakteri coliform pada air buangan proses water bath memerlukan upaya pengolahan lanjutan untuk menurunkan kadar kontaminan mikrobiologis. Penelitian ini bertujuan untuk menganalisis efektivitas kombinasi sistem filtrasi dan desinfeksi sinar ultraviolet (UV) dalam menurunkan total coliform. Metode penelitian dilakukan menggunakan tiga perlakuan media filtrasi, yaitu perlakuan P1 karbon aktif, pasir silika, dan zeolit, perlakuan P2 bio ceramic ball, serta perlakuan P3 kombinasi bio ceramic ball, karbon aktif, pasir silika, dan zeolit. Hasil perlakuan terbaik diperoleh pada P3+UV yaitu kombinasi media filtrasi bio ceramic ball, karbon aktif, pasir silika, dan zeolit yang dilanjutkan dengan proses desinfeksi sinar ultraviolet (UV) dengan penurunan kadar total coliform dari 99,67 menjadi 0,67 CFU/100 mL dengan nilai efektivitas 99,33%, nilai pH 7,91, suhu 28,4 °C, dan TDS 34 mg/L. Kombinasi media filtrasi dan sinar UV efektif dalam menurunkan cemaran mikrobiologis serta mempertahankan nilai parameter pH, suhu, dan TDS.

Process wastewater from water baths in the flexible plastic packaging industry contains microbiological contaminants in the form of coliform bacteria that exceed the water quality standards set by Minister of Health Regulation No. 2 of 2023. The coliform bacteria content in process wastewater from water baths requires further treatment to reduce the level of microbiological contaminants. This study aims to analyze the effectiveness of a combination of filtration and ultraviolet (UV) disinfection systems in reducing total coliforms. The research method was carried out using three filtration media treatments, namely treatment P1 with activated carbon, silica sand, and zeolite, treatment P2 with bio ceramic balls, and treatment P3 with a combination of bio ceramic balls, activated carbon, silica sand, and zeolite. The best treatment results were obtained in P3+UV, which is a combination of bio ceramic ball, activated carbon, silica sand, and zeolite filtration media followed by ultraviolet (UV) disinfection, with a decrease in total coliform levels from 99.67 to 0.67 CFU/100 mL with an effectiveness value of 99.33%, a pH value of 7.91, temperature of 28.4 °C, and TDS of 34 mg/L. The combination of filtration media and UV light was effective in reducing microbiological contamination while maintaining pH, temperature, and TDS parameters.