Efficient Removal of Total Nitrogen from Tannery Wastewater by Promoting Denitrification with Sodium Acetate

被引：0
|
作者：
Ma Xiaojian [1 ,2 ]
Zhou Jianfei [3 ]
Zeng Yunhang [1 ]
Shi Bi [1 ,3 ]
机构：
[1] Sichuan Univ, Natl Engn Lab Clean Technol Leather Manufacture, Chengdu 610065, Sichuan, Peoples R China
[2] Maydiang Sihong Leather Co Ltd, Suqian 223900, Peoples R China
[3] Sichuan Univ, Minist Educ, Key Lab Leather Chem & Engn, Chengdu 610065, Sichuan, Peoples R China
来源：
JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS AND CHEMISTS | 2019年 / 103卷 / 06期
基金：
中国国家自然科学基金;
关键词：
CARBON; NITRIFICATION;
D O I：
暂无
中图分类号：
TB3 [工程材料学]; TS1 [纺织工业、染整工业];
学科分类号：
0805 ; 080502 ; 0821 ;
摘要：
Total nitrogen (TN) in tannery wastewater is difficult to remove completely, because the low C/N ratio of the wastewater leads to inadequate denitrification. Sodium acetate was used as an extra carbon source to improve the denitrification efficiency and the TN removal. The appropriate COD/TN ratio for denitrification using sodium acetate was 5.1, at which the TN concentration of tannery wastewater decreased by 95%. A much faster removal of TN was obtained by adding sodium acetate in denitrification than by adding common glucose. These results showed that sodium acetate was a high-quality carbon source for a complete and rapid denitrification of tannery wastewater. The denitrification efficiency decreased with decreasing temperature and increasing chloride concentration. However, when the carbon source was made sufficient by adding sodium acetate, complete denitrification was still obtained even at 15 degrees C or 10000mg/L of chloride concentration.
引用
收藏
页码：323 / 327
页数：5
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