Acute Toxicity Investigation of Landfill Leachates Treated with Fine Bubbles

Landfill Leachates is one of the pollutants containing high organic matter and heavy metal, which can cause toxic pollution to water due to less than optimal leachate processing. This study aims to introduce fine bubbles treatment to the leachate processing technology at the waste treatment facility at Sarimukti, West Java Indonesia. The toxicity test was conducted in the acute toxicity test and test for D. magna. The acute toxicity test was carried out using a static biological test according to APHA standards (1995). The LC50-48 hours were calculates using the Finney Probit Analysis Software. The results showed that Sarimukti TPA leachate treatment’s effectiveness was 97.5% DO, 71% BOD, 86% TDS, and 74.8% turbidity. The XRF spectra on the leachate after fine bubble found a recovery of heavy metal elements such as Cr, Mn, Fe, Zn, Cu, Pb, As, and Sn. Based on the Minister of Environment and Forestry Regulation, leachate processing’s effectiveness has reached the safe standard limit for pH, mercury, cadmium parameters. The acute toxicity of leachate before and after fine bubble treatment was 14.516 ppm and 11.178 ppm. The acute toxicity of leachate is considered almost non-toxic.

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