doi:10.16186/j.cnki.1673-9787.2020.4.8

Received:2019/12/20

Revised:2020/02/18

Published:2020/07/15

Study on pollutants removal performances and denitrification kinetics of integrated floating beds

CHEN Hua1, HU Xin1, WU Song1, CAO Wenping2, ZHANG Yongming3, HENG Qiangqiang3

1.Jiangsu Fangzheng Environmental Design Research Co. ，Ltd. ，Xuzhou  221002，Jiangsu， China;2.School of Environmental Engineering， Xuzhou Institute of Technology， Xuzhou  221111， Jiangsu， China;3.Xuzhou Pohu Environmental Protection Technology Development Co.，Ltd. ， Xuzhou  221111，Jiangsu，China

Abstract:To investigate the denitrification effect and kinetics characteristics of a new combined ecological floating bed at low temperature， two groups of parallel combined ecological floating beds were set up，i. e. ， cob substrate floating bed（IFB-CF） and lightweight ceramsite substrate integrated floating bed （IFB-LC） . The study results showed that when water exchange period lasted 7 days， the degradation rates of total nitrogen （TN），  —N and   —N by IFB-CF were（13.58 ± 0.67） mg/L，（4.40 ± 0.61） mg/L，and（9.21 ±0.38 ） mg/L ， respectively. The degradation rates of total nitrogen （TN） ， —N and   —N by IFB-LC were （ 6. 41 ±1.47 ） mg/（L·d），（ 2. 15 ±0.40 ） mg/（L·d） ， （5. 95 ±0.46） mg/（L·d） ， respectively. Compared with IFB-LC ，IFB-CF had a higher TN removal effect. The kinetic processes of TN removal in the two combined ecological floating beds were in accordance with the Monod equation. The k value of IFB-LC and IFB-CF was 35. 67 and 39. 23 ， respectively. From the point of view of indicator microorganisms， there was a large difference between the microbial populations in the two substrates，which led to a large difference in water purification between the two floating beds.

Key words:denitrification;integrated floating bed;corn cob substrate;indicated microorganism;biochemical kinetics

组合式浮床去除污染物特征及脱氮动力学研究_陈华.pdf