制革废水中总氮的高效去除——用乙酸钠促进反硝化作用

被引:10
作者
马小剑 [1 ,2 ]
周建飞 [3 ]
曾运航 [1 ]
石碧 [1 ,3 ]
机构
[1] 制革清洁技术国家工程实验室(四川大学)
[2] 美迪洋(泗洪)皮革有限公司
[3] 皮革化学与工程教育部重点实验室(四川大学)
关键词
乙酸钠; 厌氧反硝化; 制革废水; 外加碳源; 反硝化过程; 氯离子浓度; 反硝化作用;
D O I
10.13536/j.cnki.issn1001-6813.2020-004-009
中图分类号
X794 [皮革工业];
学科分类号
摘要
制革废水因具有较低的碳氮比(C/N),在废水的生物处理过程中厌氧反硝化反应不完全,总氮很难被彻底去除。用乙酸钠作为外加碳源以提高制革废水的反硝化效率,促进总氮的去除。试验结果表明,乙酸钠作为反硝化碳源的最适COD/TN为5.1,在此条件下制革废水的总氮去除率达到95%。与添加常见的葡萄糖碳源相比,在反硝化过程中外加乙酸钠更利于总氮的快速去除。上述结果表明乙酸钠是一种高质碳源,有利于制革废水彻底且快速的反硝化脱氮。较低的水温以及较高的氯离子浓度会导致反硝化速率的下降。但在外加乙酸钠保证碳源充足的前提下,即使水温为15℃或氯离子浓度为10 000 mg/L时,制革废水仍可以进行彻底的反硝化反应。
引用
收藏
页码:54 / 59
页数:6
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