Nitrogen removal from low C/N wastewater in a novel Sharon&DSR (denitrifying sulfide removal) reactor

被引：3
|
作者：
Guo, Hongliang [1 ]
He, Tongyuan [1 ]
Chang, Jo-Shu [2 ,3 ,4 ]
Liu, Peng [1 ]
Lee, Duu-Jong [5 ,6 ]
机构：
[1] Northeast Forestry Univ, Coll Forestry, Harbin 150040, Peoples R China
[2] Tunghai Univ, Res Ctr Smart Sustainable Circular Econ, Taichung 407, Taiwan
[3] Natl Cheng Kung Univ, Dept Chem Engn, Tainan, Taiwan
[4] Tunghai Univ, Dept Chem & Mat Engn, Taichung 407, Taiwan
[5] City Univ Hong Kong, Dept Mech Engn, Kowloon Tong, Hong Kong, Peoples R China
[6] Yuan Ze Univ, Dept Chem Engn & Mat Sci, Chungli 32003, Taiwan
来源：
BIORESOURCE TECHNOLOGY | 2022年 / 362卷
基金：
中国博士后科学基金;
关键词：
Sharon reaction; Denitrifying sulfide removal; Nitrite; C/N ratio;
D O I：
10.1016/j.biortech.2022.127789
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
Denitrification reactions commonly remove nitrate and other reactive nitrogen (Nr) from wastewater. The C/N ratio indicates the sufficiency of organic carbons to drive heterotrophic denitrification; a low C/N ratio frequently leads to poor denitrification performance in wastewater treatment. This study proposed and tested a novel Sharon & DSR (denitrifying sulfide removal) process, with nitrite generated by the Sharon reactions and sulfide from sulfur-reducing reactions for promoting the following nitrite-based denitrification and denitrifying sulfide removal (DSR) process. The present reactor can remove nitrate at an efficiency of 97.7 %-93.5 % at an influent C/N ratio of 0.646-0.737 over a 96-d continuous-flow test. The microbial community study reveals the functional strains corresponding to individual groups of critical reactions. The stoichiometry analysis reveals the potential to apply the nitrite-based DSR process for Nr removal from ultra-low C/N (< 0.64) wastewaters, experimentally demonstrated in the present study with a C/N ratio of 0.16-0.39.
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页数：8
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