Effect of Hydraulic Retention Time on Pollutant Removal Performance of Biological Contact Oxidation Process Treating Hospital Wastewater

Bo Yu; Ying Zhou; Zheng Wen Huang; Li Chen

doi:10.4028/www.scientific.net/AMM.507.725

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 507Effect of Hydraulic Retention Time on Pollutant...

Effect of Hydraulic Retention Time on Pollutant Removal Performance of Biological Contact Oxidation Process Treating Hospital Wastewater

Abstract:

A study on hospital wastewater treatment was carried out using biological contact oxidation process. The effect of hydraulic retention time (HRT) on BOD₅, COD_Cr and SS removal was investigated. The results showed that the removal rate of BOD₅, and COD_Cr was ascending with the increase of HRT using the contrast test of five different HRTs. When the HRT was more than 4h, the effluent BOD₅, COD_Cr could meet the discharge standard (GB18466-2005). In considering of raising the biodegradability of effluent, 4h was recommended in this study. However, the whole trend of SS variation of system was not obvious with the increase of HRT, and the effluent SS could not meet the discharge standard (20mg/L). Thus, the additional processing steps to remove SS would be necessary.

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Periodical:

Applied Mechanics and Materials (Volume 507)

Pages:

725-729

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.507.725

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Online since:

January 2014

Authors:

Bo Yu*, Ying Zhou, Zheng Wen Huang, Li Chen

Keywords:

Biological Contact Oxidation Process, Hospital Wastewater, Hydraulic Retention Time (HRT), Influence Factor

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