摘要
载体是生物膜移动术反应器(MBBR)工艺的关键影响因素,利用亲水化改性聚氨酯载体构建MBBR,用于城市污水的中试研究.反应器日处理能力为3～3.5 t.d-1,水力停留时间为7～8 h,在连续进水(进水COD 140～280 mg.L-1,NH4+-N 30～50 mg.L-1,总氮45～65 mg.L-1,总磷2.5～4.0 mg.L-1)条件下对改性载体的挂膜速度、有机物和氮的去除效果及不同温度下的污水处理特性进行了研究.140 d的试验结果表明在24～28℃时,载体上生物膜在6 d左右即可完成挂膜,并达到稳定的处理效果.COD、NH4+-N、TN和TP的平均去除率分别为70%、97%、70%和39%.随着水温逐渐降低到12℃左右,NH4+-N的去除率依然能达到97%,表明通过添加改性载体可以提高反应器低温条件下的硝化能力.
The carrier is the key influencers in moving bed biofilm reactor（MBBR）,in this paper,a pilot scale apparatus was set up for treating municipal wastewater using modified cubic polyurethane carriers.For MBBR,the capacity of 3-3.5 t·d-1,hydraulic residence time of 7-8 h,under the condition of continuous feed water（COD：140-280 mg·L-1,NH＋4-N：30-50 mg·L-1,TN： 45-65 mg·L-1,TP：2.5-4.0 mg·L-1）,the speed of biofilm formation and removal effects of COD,nitrogen and phosphorus were studied.After 140 days,the results showed that the formation of biofilm on the carrier was very quickly under 24-28℃,and obtained stable treatment effect about 6 days.The COD,NH＋4-N,TN,TP average removal rates were 70%,97%,70%,39%,respectively.As the temperature gradually decreased to about 12℃,a high NH＋4-N removal rate（97%） could still be maintained,which indicating that the modified carrier can be achieved a high nitrification rate at low temperature.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2012年第10期3489-3494,共6页
Environmental Science
基金
国家高技术研究发展计划(863)项目(2009AA062903)
关键词
MBBR
城市污水
改性聚氨酯载体
脱氮
moving bed biofilm reactor（MBBR）
municipal sewage
modified polyurethane carriers
nitrification and denitrification
