Study on Evaluation Methods for Biodegradability and Biotoxicity of Industrial Effluents

Abstract:

The industrial effluents produced in petrochemical production contain kinds of pollutants and fluctuate wildly, also lead sewage plant to be impacted frequently. It is significant to develop a method that warms the effluents quality early, efficiently and accurately. As a result, it can make the biochemical devices run and manage smoothly. Based on the extreme sensitivity of Oxygen Uptake Rate (OUR) and Dehydrogenase Activity (DHA) to the abnormal effluents and toxicants, this study proposed a comprehensive assessment method of biodegradability and biotoxicity with Specific Oxygen Uptake Rate (SOUR) and Specific Dehydrogenase Activity (SDHA). And it also discussed the biodegradability and biotoxicity of the industrial effluents with different pH and toxicant by detecting OUR, SOUR and DHA. The results showed that, these three indexes were extremely sensitive and accurate to the effluents quality change. And the maximum concentrations of phenol, formaldehyde and carbinol that the microorganisms can allow in the industrial effluents were 350mg/L, 70mg/L and 170 mg/L. When the sewage plant was functioning normally, SOUR and SDHA fluctuations were 3.0~7.0 and 1.0~4.0 respectively. Therefore, they have important application value and prospect to early warming in the effluents quality.

• Periodical: Advanced Materials Research (Volumes 518-523)
• Pages: 516-519
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.518-523.516
• Online since: May 2012
• Authors: De Gang Xu, Ju Feng Li, Yu Zhong Li
• Keywords: Biodegradability, Biotoxicity, Dehydrogenase Activity (DHA), Industrial Effluents, Oxygen Uptake Rate (OUR)

References

[1] Hongmei Jiang, Yucheng Chen and Dingyong Wang: Feasibility Analysis of Wastewater's Biodegradability by The Ratio of BOD5/TOD,in Chinese， Chongqing Environmental Science, Vol. 22 (2000), pp.47-49.

[2] Joaquin Suescun: Dissolved Oxygen Control and Simultaneous Estimation of Oxygen Uptake Rate in Activated Sludge Plants, Wat. Envir. Res, Vol. 70 (1998), pp.316-322.

DOI: 10.2175/106143098x124948

[3] Xiaolu Xu and Xiuying Shen: Evaluation of Active Indicator of Activated Sludge，in Chinese, Chinese Journal of Environmental Science, Vol. 14 (1993), pp.58-62.

[4] Mei Hong: Application of ATP Determination in Waste Water Treatment Plants,in Chinese Chemical Engineer, Vol. 10 (2002), pp.56-60.

[5] Dinghua Shen, Zhaoyi Xu and Gang Kong: Monitoring Inhibitory Effect of Substituted Phenol Compounds on Activated Sludge Using Respirometer,inChinese， Environmental Science and Technology, Vol. 28 (2005), pp.50-55.

[6] Wane Guan, Hongguang Ge and Kefeng Zhang: Wastewater Treatment Technology，in Chinese, (Chemistry Industry Publications, Beijing 2003).