pH值对包埋固定化技术反硝化脱氮的影响  

Influence of pH on Denitrification with Embedded Immobilized Technology

作　　者：宋佳强 李军[1] 陈光辉[1] 张振家[2] SONG Jia-qiang;LI Jun;CHEN Guang-hui;ZHANG Zhen-jia(Key Laboratory of Beijing for Water Quality Science & Water Environment Recovery Engineering,Beijing University of Technology, Beijing 100124, China;School of Environmental Science & Engineering, Shanghai Jiao Tong University, Shanghai 200240, China)

机构地区：[1]北京工业大学水质科学与水环境恢复工程北京市重点实验室,北京100124 [2]上海交通大学环境科学与工程学院,上海200240

出　　处：《中国给水排水》2019年第3期78-82,共5页China Water & Wastewater

基　　金：国家水体污染控制与治理科技重大专项(2014ZX07406002);国家自然科学基金资助项目(51078008);北京市教委重点项目(KZ201110005008)

摘　　要：在配水条件下,考察了p H值对包埋固定化技术反硝化脱氮的影响。结果表明,通过包埋固定化技术固定的反硝化菌经过驯化后,在酸性条件下其反硝化能力受到抑制,系统的pH值沿程升高;在中性和偏碱性条件下表现出了较好的反硝化能力,系统的pH值先升后降,在起始pH值=8和9时出现了亚硝态氮的积累。包埋固定化反硝化菌在pH值=8时有最佳的反应速率,在填充率为20%的情况下,可在60 min时去除45 mg/L的硝态氮。由于包埋固定化颗粒需要传质作用才能实现反硝化菌与原水中碳源和硝态氮的接触,导致反应时间较反硝化污泥长,因此当pH值=9时,其亚硝态氮积累现象出现的时间较反硝化污泥延后。The influence of pH on denitrification with embedded immobilized technology was investigated using simulated wastewater. The results showed that, the denitrification efficiency of the immobilized denitrifying bacteria was inhibited under acidic conditions, and the system pH increased with time. High denitrification efficiency was achieved under neutral and alkaline conditions, in which the system pH decreased after initially increased. Nitrite nitrogen accumulation was observed at the initial pH of 8 and 9. The immobilized denitrifying bacteria showed the highest reaction rate at pH of 8 , and with a filling rate of 20%, 45 mg/L of nitrate nitrogen was removed within 60 min. Mass transfer was critical to the contact of denitrifying bacteria and carbon source and nitrate nitrogen in raw wastewater, so the reaction time was longer than that of denitrifying sludge. When the pH value was 9 , the appearance of the nitrite nitrogen accumulation of immobilized denitrifying bacteria was postponed, in comparison with denitrifying sludge.

关 键 词：包埋固定化技术 反硝化菌 脱氮 PH值 亚硝态氮 

分 类 号：TU992.3[建筑科学—市政工程]