The methods of respiratory curve and COD 30 were adopted to evaluate the biodegradability of acrylic retanning agent DT-R521, which was used as the substrate of microorganism. The main results obtained by the method of respiratory curves were as follows: When the concentration of substrate was 0 3000mg/L, the respiratory curves of the substrate were under the curve of endogenous, which showed that the substrate has inhabiting effect on microorganism. When the concentration of the substrate was 1500mg/L, the utilization of the substrate by microorganism was the most. The main results obtained by the method of COD 30 were as follows: when sludge concentration was 1000mg/L and pH was 7, the biodegradation rate of 500mg/L DT-R521 was 26.21%. Under above condition, the biodegradation rates of DT-R521 with other concentrations were much smaller. Moreover, as indicated in the respiratory curves, the effect of sludge concentration, salinity and co-metabolism on the biodegradability of the substrate was obvious. Under the experimental conditions, when the concentration of the substrate was 1500mg/L, the sludge concentration was 3000mg/L and salinity was 0.7%, the biodegradability of the substrate was the best. The glucose was as co-metabolism substrate and when its concentration was 300mg/L, the biodegradability of the substrate was obviously increased. © 2012 Springer-Verlag.
CITATION STYLE
Wang, X., Fu, Y., Qiang, T., & Ren, L. (2012). Study on biodegradability of acrylic retanning agent DT-R521. In Lecture Notes in Electrical Engineering (Vol. 137 LNEE, pp. 319–325). https://doi.org/10.1007/978-3-642-26007-0_40
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