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A pilot‐scale deep bed denitrification filter for secondary effluent treatment using sodium acetate as external carbon
Author(s) -
Zheng Xiaowei,
Zhang Shenyao,
Huang Deying,
Zhang Liu,
Zhang Jibiao
Publication year - 2019
Publication title -
water environment research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.356
H-Index - 73
eISSN - 1554-7531
pISSN - 1061-4303
DOI - 10.1002/wer.1035
Subject(s) - denitrification , effluent , sodium acetate , chemistry , chemical oxygen demand , environmental chemistry , organic matter , pulp and paper industry , nitrogen , environmental engineering , chromatography , environmental science , wastewater , organic chemistry , engineering
A pilot‐scale quartz sand deep bed denitrification filter ( DBDF ) using sodium acetate as the additional carbon source was implemented to treat secondary effluent, with a high nitrate nitrogen ( NO 3 ‐N) concentration and low C/N ratio, from an urban municipal water resource recovery facility. By the 18th day, results showed that the removal efficiency of NO 3 ‐N and the chemical oxygen demand ( COD ) were stable at above 85% and 70%, respectively. When the filter layer depth was set to 1,600 mm and the concentration of additional sodium acetate was maintained at 51 mg/L, the total nitrogen and COD concentrations of the DBDF effluent were stabilized below 5 and 30 mg/L, respectively. The quartz sand DBDF had a good effect on the removal of dissolved organic matter, especially for aromatic protein‐like and tryptophan protein‐like substances. Bacteria with denitrification function, such as Cloacibacterium and Zoogloea , became increasingly dominant with increasing filling layer depth. Practitioner points The denitrification filter had a good effect on the removal of aromatic protein‐like and tryptophan protein‐like substances. Cloacibacterium and Zoogloea became increasingly dominant with increasing filling layer depth.