摘要
缺乏有机碳源污水中硝酸盐氮难以生物转化,以投加Fe(0)-活性炭尝试弥补生物厌氧脱氮过程中缺乏的有机碳,并筛选了铁碳的最优投加比例(质量比)。结果表明,铁碳的投加可以对生物反硝化起促进作用,铁碳内电解可以有效减少微生物在反硝化时对碳源的依赖。固定铁的质量为5 g,COD为135 mg/L,在C/N=3且投加铁碳比例为2:1时,反硝化率由52.1%提升到83.3%;将C/N降低至2.25,设置铁碳比例为1:1至5:1的五组实验组的反硝化率均在90%以上,铁碳比例越大生成氨氮越多;当投加m(铁):m(碳)为1:1时反硝化率由41.99%提升到93.84%,且生成亚硝氮与氨氮相对其他各组较少。
The lack of organic carbon source wastewater nitrate nitrogen is difficult to biotransform, and Fe(0)-activated carbon was added to try to reduce the organic carbon required in biological anaerobic denitrification process, and the optimal dosage ratio of iron and carbon was screened(mass ratio). The results showed that the addition of iron and carbon could promote the biological denitrification, and the iron-carbon internal electrolysis could effectively reduce the dependence of microorganisms on carbon sources during denitrification. The mass of fixed iron was 5 g and the concentration of COD was 135 mg/L. When C/N was 3 and the ratio of iron to carbon was 2:1, the denitrification rate was increased from 52.1% to83.3%. The C/N ratio was reduced to 2.25, and the denitrification rates of the five experimental groups with the ratio of iron to carbon of 1:1 to 5:1 were all above 90%. The larger the ratio of iron to carbon, the more ammonia nitrogen was produced;When m(iron) : m(carbon) was 1:1, the denitrification rate increased from 41.99% to 93.84%, and the formation of nitrous oxide and ammonia nitrogen was less than that of other groups.
作者
徐炳阳
黄显怀
李卫华
XU Bingyang;HUANG Xianhuai;LI Weihua(School of Environment and Energy Engineering,Anhui Jianzhu University;Anhui Key Laboratory of Water Pollution Control and Wastewater Reuse, Anhui Jianzhu University,Hefei 230601,China)
出处
《水处理技术》
CAS
CSCD
北大核心
2019年第8期108-111,共4页
Technology of Water Treatment
基金
国家自然科学基金资助项目(51578002)
关键词
低铁碳内电解
反硝化
低碳氮比
反硝化率
iron carbon internal electrolysis
denitrification
low carbon-nitrogen ratio
denitrification rate
