溶解氧对亚硫酸盐型自养反硝化的影响  

Effect of Dissolved Oxygen on Sulfite-type Autotrophic Denitrification

作　　者：连雨露 倪伟敏[1] 李可 刘月曈 LIAN Yu-lu;NI Wei-min;LI Ke;LIU Yue-tong(Hangzhou Normal University Key Laboratory of Ecosystem Conservation and Restoration Zhejiang Hangzhou 311121,China)

机构地区：[1]杭州师范大学生态系统保护与恢复杭州市重点实验室,浙江杭州311121

出　　处：《广州化工》2021年第12期79-81,共3页GuangZhou Chemical Industry

基　　金：浙江省新苗计划项目(2019R426029);杭州师范大学本科生创新创业能力提升工程(cx2018135)。

摘　　要：亚硫酸盐可代替碳源作为电子供体被脱氮硫杆菌利用进行反硝化,去除水中硝酸盐。亚硫酸钠可作为脱氧剂,在30℃,10.17 mmol/L的亚硫酸钠可在4 min内将水中DO降至0 mg/L。添加相同量亚硫酸钠,半封闭状态下,DO容易上升,稳定周期短,一个周期内硝态氮去除率仅为46.74%;而全封闭状态下,DO可长期稳定在0 mg/L,一个周期内硝态氮的去除率可达到97.74%。溶解氧会对亚硫酸盐型自氧反硝化产生抑制,通过改变亚硫酸钠投加量与采用全封闭状态可以消除抑制。Sulfite can replace the carbon source as an electron donor and be used by Thiobacillus denitrificans to denitrify and remove nitrate from water.Sodium sulfite can also be used as a deoxidizer.At 30℃,10.17 mmol/L sodium sulfite can reduce DO in water to 0 mg/L within 4 min.Adding the same amount of sodium sulfite,the DO was easy to rise in the semi-closed state,the stable period was short,and the nitrate nitrogen removal rate in one cycle was only 46.74%.While in the fully closed state,DO can be stabilized at 0 mg/L for a long time,and the removal rate of nitrate nitrogen in one cycle can reach 97.74%.Dissolved oxygen can inhibit sulfite-type auto-oxygen denitrification,which can be eliminated by changing the dosage of sodium sulfite and adopting a fully enclosed state.

关 键 词：自养反硝化 亚硫酸盐 溶解氧抑制 pH影响 

分 类 号：X703.1[环境科学与工程—环境工程]