Influencing Factors on Nitrogen Removal Performance of Combined Biological Aerated Filter for Secondary Effluent from Municipal WWTP

• Published in: 2009 3rd International Conference on Bioinformatics and Biomedical Engineering pp. 1 - 4
• Main Authors: Zhang, Jinsong, Yang, Yue, Wang, Hong-Jie, Huang, Wen-Zhang
• Format: Conference Proceeding
• Language: English
• Published: IEEE 01.06.2009
• Subjects: Biological materials; Carbon dioxide; Ceramics; Cities and towns; Effluents; Filters; Nitrogen; Temperature; Water conservation; Water resources
• ISBN: 9781424429011; 1424429013
• ISSN: 2151-7614
• DOI: 10.1109/ICBBE.2009.5162965

A pilot-scale study was conducted to investigate the principal influencing factors on nitrogen removal performance of combined biological aerated filter (CBAF), including external carbon source dosage, ratio of air to water and hydraulic loading rate, with inflow of secondary effluent form a municipal WWTP in Shenzhen city. Moreover, the optimal operation mode of CBAF was determined as follows: with 15~25 mg COD Cr /L of added carbon source, 2:1 of the ratio of air to water and 10 m 3 /m 2 -d of hydraulic loading rate, CBAF had an excellent and stable removal performance of nitrogen under this running mode. When the concentrations of NH 4 + -N and TN in the influent were 1.0~17.4 mg/L and 7~23 mg/L, the concentrations in the effluent were lower than 2 mg/L and 15 mg/L respectively. The water quality of the effluent was in accordance with the requirements of Water Quality Standard for Scenic of Environment Use (GB/T18921-2002).