Volume 23 Issue 6
Dec.  2010
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Man-Hong HUANG, Yong-Mei LI, Guo-Wei GU. Toxicity Reduction of Municipal Wastewater by Anaerobic-anoxic-oxic Process[J]. Biomedical and Environmental Sciences, 2010, 23(6): 481-486.
Citation: Man-Hong HUANG, Yong-Mei LI, Guo-Wei GU. Toxicity Reduction of Municipal Wastewater by Anaerobic-anoxic-oxic Process[J]. Biomedical and Environmental Sciences, 2010, 23(6): 481-486.

Toxicity Reduction of Municipal Wastewater by Anaerobic-anoxic-oxic Process

Funds:  the National Science Foundation Project grants of China(50878165%21007010)%the Program for New Century Excellent Talents in University(NCET-08-0403)%the Research Fund for the Doctoral Program of Higher Education of China(20090075120007)%the Shanghai Committee of Science and Technology, China(09230500200)%the Fundamental Research Funds for the Central Universities of China(10D11308)%the Key Special Program on the S&T for the Pollution Control and Treatment of Water Bodies(2008ZX07316-003)%the Shanghai Leading Academic Discipline Project(B604)
  • Objective This study was conducted to optimize the operational parameters of anaerobic-anoxic-oxic (A2/O) processes to reduce the toxicity of municipal wastewater and evaluate its ability to reduce toxicity. Methods A luminescent bacterium toxicity bioassay was employed to assess the toxicity of influent and effluent of each reactor in the A2/O system. Results The optimum operational parameters for toxicity reduction were as follows: anaerobic hydraulic retention time (HRT) = 2.8 h,anoxic HRT = 2.8 h, aerobic HRT = 6.9 h, sludge retention time (SRT) = 15 days and internal recycle ratio (IRR) = 100%. An important toxicity reduction (%) was observed in the optimized A2/O process, even when the toluene concentration of the influent was 120.7 mg.L-1. Conclusions The toxicity of municipal wastewater was reduced significantly during the A2/Oprocess. A2/O process can be used for toxicity reduction of municipal wastewater under toxic-shock loading.
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    沈阳化工大学材料科学与工程学院 沈阳 110142

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Toxicity Reduction of Municipal Wastewater by Anaerobic-anoxic-oxic Process

Funds:  the National Science Foundation Project grants of China(50878165%21007010)%the Program for New Century Excellent Talents in University(NCET-08-0403)%the Research Fund for the Doctoral Program of Higher Education of China(20090075120007)%the Shanghai Committee of Science and Technology, China(09230500200)%the Fundamental Research Funds for the Central Universities of China(10D11308)%the Key Special Program on the S&T for the Pollution Control and Treatment of Water Bodies(2008ZX07316-003)%the Shanghai Leading Academic Discipline Project(B604)

Abstract: Objective This study was conducted to optimize the operational parameters of anaerobic-anoxic-oxic (A2/O) processes to reduce the toxicity of municipal wastewater and evaluate its ability to reduce toxicity. Methods A luminescent bacterium toxicity bioassay was employed to assess the toxicity of influent and effluent of each reactor in the A2/O system. Results The optimum operational parameters for toxicity reduction were as follows: anaerobic hydraulic retention time (HRT) = 2.8 h,anoxic HRT = 2.8 h, aerobic HRT = 6.9 h, sludge retention time (SRT) = 15 days and internal recycle ratio (IRR) = 100%. An important toxicity reduction (%) was observed in the optimized A2/O process, even when the toluene concentration of the influent was 120.7 mg.L-1. Conclusions The toxicity of municipal wastewater was reduced significantly during the A2/Oprocess. A2/O process can be used for toxicity reduction of municipal wastewater under toxic-shock loading.

Man-Hong HUANG, Yong-Mei LI, Guo-Wei GU. Toxicity Reduction of Municipal Wastewater by Anaerobic-anoxic-oxic Process[J]. Biomedical and Environmental Sciences, 2010, 23(6): 481-486.
Citation: Man-Hong HUANG, Yong-Mei LI, Guo-Wei GU. Toxicity Reduction of Municipal Wastewater by Anaerobic-anoxic-oxic Process[J]. Biomedical and Environmental Sciences, 2010, 23(6): 481-486.

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