悬浮填料强化硝化功能及温度影响试验研究

Enhanced Nitrification with Suspended Carrier Addition at Different Temperatures

投加悬浮填料的MBBR工艺近年来在国内开始得到工程应用,但其生产性运行的实际效能及影响因素尚未得到系统研究。以实际运行的污水处理厂MBBR系统为测试对象,分别对活性污泥系统和悬浮填料+活性污泥复合系统的硝化能力及温度影响进行了试验研究,测定了不同温度下的硝化速率,并进行温度系数的比较研究,以判断温度变化对悬浮填料强化复合系统硝化效果的影响。测试结果表明:在填充率为45%的悬浮填料+活性污泥复合处理系统中,当温度分别为11、14、17、20、23、26、29和32℃时,硝化速率分别提高了156%、122%、105%、84%、64%、53%、27%和14%,硝化处理效果分别提高了123%、93%、78%、60%、42%、33%、11%和6.5%。温度变化对硝化过程有较大影响,但悬浮填料的投加可增强低温条件下复合系统的硝化能力,缓解温度变化对硝化功能的不利影响。

In recent years, the MBBR process with suspended carrier has been put into engineering application in China, but the actual operation performance and its influencing factors have not been systematically studied. The MBBR system in a large municipal wastewater treatment plant was sampled and tested to determine its nitrification performance at different temperatures. The testing results showed that at 11, 14, 17, 20, 23, 26, 29 and 32℃, the nitrification rates of MBBR system with 45% carrier filling rate increased by 156% , 122% , 105% , 84% , 64% , 53%, 27% and 14% , and the corresponding nitrification capacities increased by 123%, 93%, 78%, 60%, 42%, 33%, 11% and 6.5%, compared with those of activated sludge system without suspended carrier, respectively. The nitrification process was sensitive to temperature, while the low temperature nitrification capacity could be enhanced and the low temperature impact on nitrification could be reduced by the addition of the suspended carrier.