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Toxicity of Various Organic Substances in Wastewater and Evaluated on Daphnia magna 1) Department of Environmental Engineering, Faculty of Engineering, University of Muhammadiyah Jember, Jember 68121, Indonesia. Abstract In accordance with the quantity complexity, organic substances have the complexity of pollutant quality. Wastewater with a high content of pollutants can be harmful to the biota in salt water and fresh water. There is a change in the level of danger from substances that are not mixed to mixed. This study is important and necessary for the discharge of wastewater. The objective is to obtain varied range of substances, also determining the quality of wastewater discharging to fresh waters. COD analysis using gas chromatography (GC7900, Hongkong). Toxicity test on D. magna using Methods for Measuring the Acute Toxicity of Effluents and Receiving Waters to Freshwater and Marine Organisms (USEPA, 2002). Pow variability and BOD/COD ratio had a negative correlation of -0.486 (Pearson Sig 95%). Diazinon-formaldehyde-IPA showed the lowest LC-50 (11.82 mg/L) in D. magna. There is compatibility between wastewater in the field and artificial wastewater in a mixture of organic acetic acid-IPA-formaldehyde in the biodegradable zone. The results of the BOD/COD ratio of the real material are similar to the reference material range in a mixture of organic matter acetic acid-IPA-formaldehyde in the biodegradable zone. This shows that acetic acid-IPA-formaldehyde can be used as a comparison of the six types of real materials, at any concentration. Keywords: toxicity- organic substances- wastewater- Daphnia magna Topic: Engineering |
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