EFFECT OF FeCl3 COAGULAN DOSAGE ON DECREASING TURBIDITY OF LEATHER TANNERY WASTE PROCESSING

Nanda Brilian Tantri; Swatika Juhana; Ragil Yuliatmo

doi:10.58533/bpfcjx20

Penulis

Nanda Brilian Tantri Department of Leather Processing Technology, Politeknik ATK Yogyakarta, 55188, Special Distric of Yogyakarta, Indonesia Penulis
Swatika Juhana Department of Leather Processing Technology, Politeknik ATK Yogyakarta, 55188, Special Distric of Yogyakarta, Indonesia Penulis
Ragil Yuliatmo Department of Leather Processing Technology, Politeknik ATK Yogyakarta, 55188, Special Distric of Yogyakarta, Indonesia Penulis

DOI:

https://doi.org/10.58533/bpfcjx20

Kata Kunci:

coagulant, FeCl3, turbidity, leather tanning waste, chromium content

Abstrak

The leather tanning industry is one of the industries that produces liquid waste. The liquid waste of the leather tanning industry contains pollutants with a high level of turbidity. This research was conducted to determine variations in the dose of FeCl₃ as a coagulant to reduce the turbidity of leather tanning wastewater. The coagulant added was 5 mL of FeCl₃ with various doses of 1%, 2%, 3%, 4% and 5%. The optimum dose of FeCl₃ coagulant to treat 300 mL of liquid waste is 3% with a volume of 5 mL, which means that 500 mg/L or 500 ppm is needed. The results showed a decrease in turbidity at the optimum dose was 94%, a decrease in chromium content of 83,53%. This shows that the effect of FeCl₃ on reducing total chromium content and turbidity gives quite good results.