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Long-term toxicity to aquatic invertebrates

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Description of key information

Based on the analogue approach justification, the following results on the chronic toxicity to invertebrates obtained on Vinasses, residue of fermentation, can be applied to the Vinasses, residue of fermentation, depotassified  :
NOECreproduction (21d) > 100 mg/L (nominal), > 42 mg/L (measured)
NOECparental mortality (21d) = 56 mg/L (nominal), = 23 mg/L (measured)

Key value for chemical safety assessment

Additional information

One key study is available on Vinasses, residue of fermentation. A long-term study withDaphnia magnawas performed to investigate the toxicity of Vinasses towards aquatic invertebrates (Bouwman, 2010). The study was conducted according to the OECD Guideline 211 “Daphnia magnaReproduction Test” in a semi-static test design for 21 days. Vinasses, residue of fermentation was applied in concentrations of 10, 18, 32, 56 and 100 mg/L. Based on the TOC content of the test material (i.e. 25.96%), the concentration of Vinasses in the aquatic samples was calculated and corrected for the control, resulting in average exposure concentrations of 3.8, 7.4, 13, 23 and 42 mg/L. No chronic effects on reproduction were observed at the highest test concentration of 42 mg/L, based on measured concentrations, corresponding to 100 mg/L, nominal concentration. The lowest no observed effect concentration was obtained for parental mortality: NOEC = 23 mg/L measured (56 mg/L nominal).

Vinasses, residue of fermentation and vinasses, residue of fermentation, depotassified contain very similar dry matter contents and the same types of components with similar ranges.The test results obtained for Vinasses, residue of fermentation on biodegradation, with fish (short term), daphnia (long term), algae and activated sludge reveal no persistency and no toxicity hazard for the aquatic environment. Therefore, based on the analogue justification approach,an analogy can be done on these properties between Vinasses, residue of fermentation and Vinasses residue of fermentation, depotassified.


Thus, Vinasses, residue of fermentation, depotassified, is considered to not affect reproduction of Daphnia magna at a nominal concentration of 100 mg/L after 21 days of exposure (NOEC), corresponding to an average exposure concentration of 42 mg/L.