Abstract:

Pyridine was treated by supercritical water oxidation and the effects of various factors were investigated. The results showed that the removal efficiency of TOC increased with the increase of pyridine initial concentration, reaction temperature, oxidation coefficient(OC) and residence time. However, the residual efficiency of ammonia nitrogen increased with pyridine initial concentration increasing, decreased first and then increased with reaction temperature increasing, and increased first and then decreased with the oxidation coefficient and the residence time increasing. The removal efficiency of TOC was 91.99% and the residual efficiency of ammonia nitrogen were 91.99% and 58.69%, respectively, when the optimal condition was reaction temperature 460 ℃, OC=2 and residence time 5 min, initial concentration of pyridine 100 mmol/L.

Key words: pyridine wastewater, supercritical water oxidation, ammonia nitrogen, TOC

摘要：

对吡啶溶液进行超临界水氧化处理，研究各因素对降解效果的影响。结果表明，TOC去除率随吡啶初始浓度、反应温度、氧化系数（OC）及停留时间的增加而增加，而氨氮残留率随吡啶初始浓度升高而升高，随温度升高先降低后升高，随氧化系数及停留时间的提高先升高后降低。选择初始质量浓度为100 mmol/L的吡啶溶液进行研究，在反应温度460℃，OC=2，停留时间5 min的优选条件下TOC去除率达到91.99%，氨氮残留率为58.69%。

关键词: 吡啶废水, 超临界水氧化, 氨氮, TOC

CLC Number: 

• X703