移动床生物膜反应器载体亲水改性的试验研究

采用聚合物共混法研究载体亲水性改善的可行性,在此基础上研究电晕处理对亲水性能强化的效果和持续性.结果表明,共混方式能够改善载体亲水性能,接触角从108°降至88°,载体表面已经呈亲水性;电晕处理能够强化亲水性能,接触角可进一步降低至72°,但强化效果持续时间短.从检测指标和检测方法2方面建立载体生物学性能评价体系,研究亲水性能改善对载体生物学性能的影响.对比电晕处理前后载体,经20 d生物学性能试验检测表明,亲水性能经电晕处理强化的载体启动快,启动第2 d COD和NH⁺₄-N去除率就分别高达80%和97%,同期未电晕处理载体仅为61%和63%;后期两者处理效果基本持平,说明电晕改性初期效果明显,而持续时间有限;也表明所建立的生物学性能评价体系快速可靠.

Experiment Study on Carriers in Moving Bed Biofilm Reactor

Two methods of mixture modified and corona discharge were used to modify hydrophilic performance of the surface of the carriers.By mixture modified,the contact angle reduced from 108° to 88°,which showed carriers were hydrophilic; corona discharge could strengthen the effect and contact angle could reduce to 72° further,although the effect lasted short time.To compare two carriers modified by corona discharge or not,evaluation system for biological quality of carries were established from two aspects:monitor indexes and monitor methods.Experiment lasted for 20 days.The results showed that the reactor filled with the former started up more quickly.On the 2nd day,removal rate of COD and NH⁺₄-N was 80% and 97%,respectively; while removal rate of the reactor filled with the latter only reached 61% and 63%,respectively.But soon,the removal rate of the both pollutants was nearly the same.It confirmed that the modified effect by corona discharge lasted short time,and indicated this evaluation system was fast,feasible and reliable.