摘要
本实验研究在乙酸钠和可溶性淀粉2种碳源条件下,好氧/缺氧条件SBR反应器中,可溶性微生物产物(soluble microbial products,SMP)的产生规律及对反硝化总氮去除贡献的影响.乙酸钠系统总氮去除率为71%,进水碳源对总氮去除贡献为51.7%,SMP对总氮去除贡献率18.6%.其中由外源底物代谢形成的UAP和胞外聚合物水解形成的BAP贡献分别为2.6%和16%;淀粉系统总氮去除率为80.7%,进水碳源对总氮去除贡献为44.6%,SMP对总氮去除贡献率36%,其中UAP和BAP的贡献分别为3%和33%.可见淀粉系统总氮去除率以及生成的SMP对总氮去除贡献较乙酸钠系统更高,在SMP的减量利用等方面更有优势.
In this study,the generation of soluble microbial products(SMP)and its effect on the removal of total nitrogen from denitrification were investigated in an SBR reactor under aerobic/anoxic conditions under the conditions of sodium acetate and soluble starch.The total nitrogen removal rate of the sodium acetate system was 71%,the contribution of the influent carbon source to the total nitrogen removal was 51.7%,and the contribution rate of SMP to the total nitrogen removal was 18.6%,of which the contribution of UAP formed by the metabolism of exogenous substrates and the BAP formed by the hydrolysis of extracellular polymers was 2.6%and 16%,respectively,the total nitrogen removal rate of the starch system was 80.7%,the contribution of the influent carbon source to the total nitrogen removal was 44.6%,and the contribution rate of SMP to the total nitrogen removal was 36%,of which the contribution of UAP and BAP was 3%and 33%,respectively.It can be seen that the total nitrogen removal rate of starch system and the contribution of generated SMP to total nitrogen removal are higher than those of sodium acetate system,and they have more advantages in the reduction and utilization of SMP.
作者
张健
刘璐
李亚静
王少坡
ZHANG Jian;LIU Lu;LI Yajing;WANG Shaopo(Tianjin Key Laboratory of Aquatic Science and Technology,TCU,Tianjin 300384,China)
出处
《天津城建大学学报》
2025年第6期279-285,共7页
Journal of Tianjin Chengjian University
关键词
碳源
可溶性微生物产物
生物脱氮
贡献率
Carbon source
Soluble microbial products
Biological nitrogen removal
Contribution rate
