摘要
采用自主研发的智能化控制系统,以智能化控制的运行方式使序批式生物膜反应器(SBBR)形成交替运行的好氧-缺氧环境,对不同C/N人工模拟城市污水进行了脱氮磷实验研究.该实验中控制反应器内水温为25℃±1℃,曝气量为150 L/h,进水COD浓度为300 mg/L、TP浓度为5 mg/L,以TN浓度为30、60、90 mg/L分别运行了15、20、20 d.结果表明,当C/N分别为10、5、3.3时,COD的平均去除率分别达到85.2%、91.1%、97.7%;而TP的平均去除率分别达到94.1%、95.9%、96.7%;NH 4+-N的平均去除率分别达到95.8%、99.2%、80.0%;TN平均去除率则分别达到90.7%、81.1%、58.3%.C/N对氮的去除影响较大,随着C/N的降低,TN的去除率随之降低,而COD和TP的去除率略有升高.智能化控制SBBR中存在着同步硝化反硝化和短程同步硝化反硝化,C/N越高,反硝化程度越高.智能化控制SBBR在进水后未经厌氧释磷,直接以好氧-缺氧方式运行,具有良好的除磷效果,和传统的厌氧释磷好氧吸磷理论和研究有所不同.
The laboratory-scale experiments were conducted to treat synthetic municipal wastewater at different C /N ratios,using a developed intelligent controller sequencing batch biofilm reacter（SBBR）,which formed alternative aerobic-anoxic environment.The performance of nitrogen and phosphorus removal was investigated under different conditions（T = 25℃ ± 1℃,Vaeration = 150 L /h,COD = 300 mg /L,TP = 5 mg /L,TN = 30 mg /L,toperation = 15 d;TN = 60 mg /L,toperation = 20 d;TN = 90 mg /L,toperation = 20 d）.The average removal efficiency of COD reaches 85.2%,91.1% and 97.7%,the average removal efficiency of TP achieves 94.1%,95.9%,96.7%,the average removal efficiency of NH 4＋-N reaches 95.8%,99.2%,80.0%,and the average removal efficiency of TN are 90.7%,81.1%,58.3%,respectively.With the decrease of C /N ratios,the removal efficiency of N decreases significantly,while the removal efficiency of COD and TP increase slightly.In intelligent controlled SBBR,simultaneous nitrification and denitrification and shortened simultaneous nitrification and denitrification occur,meanwhile,the denitrification of the system strengthens with the increasing of C /N ratios.After the influent finished,intelligent controlled SBBR starts to operate in aerobic-anoxic environment.The efficiency of phosphorus removal is high,moreover,the theory of phosphorus removal is different from the conventional theory of release anaerobic and uptake aerobic phosphorus.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2011年第3期729-735,共7页
Environmental Science
基金
国家水体污染控制与治理科技重大专项(2008ZX07102-002)
"十一五"国家科技支撑计划项目(2006BAJ08B04)
国家高技术研究发展计划(863)项目(2007AA06Z351)
关键词
智能化控制
序批式生物膜反应器
C/N
脱氮除磷
intelligent controlled
sequencing batch biofilm reactor（SBBR）
C/N
nitrogen and phosphorus removal
