游离氨耦联溶解氧调控高氮豆制品废水脱氮探究

为了实现高氮豆制品废水短程硝化的快速启动与稳定运行,采用了游离氨(FA)耦联溶解氧(DO)的策略进行调控。结果表明,当ρ(DO)在0.2~1.2 mg/L时,豆制品废水均能成功启动亚硝化,并且随着ρ(DO)的增加,达到完全亚硝化的周期数增加。ρ(DO)的升高促进硝化速率,并且当ρ(DO)在1.2~1.5 mg/L时,初始硝化速度为8.5 mg/(g·h),显著高于其他实验组。在FA耦联DO控制豆制品废水短程硝化过程中,而当ρ(FA)控制在6.5~7.0 mg/L时,豆制品废水短程硝化进入稳定期,Nitrosomonas europaea和Nitrosomonas stercoris增加至30.5%和21.3%。

Research on Nitrogen Removal from High Nitrogen Soybean Products Wastewater by Free Ammonia Coupled with Dissolved Oxygen

In order to realize the rapid start-up and stable operation of shortcut nitrification of high nitrogen soybean products wastewater,the strategy of free ammonia(FA)coupled dissolved oxygen(DO)was adopted to control.The results showed that when p(DO)was 0.2~1.2 mg/L,the soybean wastewater could start nitrification successfully,and with the increase ofρ(DO),the cycle count of complete nitrification increased.The nitrification rate increased with the increase ofp(DO),whenρ(DO)was 1.2-1.5 mg/L,the initial nitrification rate was 8.5 mg/(g·h),which was significantly higher than other experimental groups.In the process of FA coupled DO controlling the short-range nitrification of soybean products wastewater,when p(FA)was controlled at 6.5~7.0 mg/L,the short-range nitrification of soybean products wastewater entered a stable period,and Nitrosomonas europaea and Nitrosomonas stercoris increased to 30.5%and 21.3%,respectively.