不同改性方法对生物砂滤池生物膜特性及处理受污染原水效果的影响
Effect of Different Modification Methods on Biofilm Characteristics and Treatment Effect of Contaminated Raw Water in Biological Sand Filters
李思敏 1王彦飞 1唐锋兵 1许铮 2郭沛然 1李乐民1
作者信息
- 1. 河北工程大学污水处理及资源化利用河北省工程研究中心,河北邯郸 056038;河北工程大学河北省水污染控制与水生态修复技术创新中心,河北邯郸 056038;河北工程大学邯郸市城市水利用技术重点实验室,河北邯郸 056038
- 2. 唐山市规划建筑设计研究院有限公司,河北唐山 063000
- 折叠
摘要
通过对普通石英砂(QS)进行氨基及铝钙双氢氧化物改性制得氨基改性砂(AMS)和铝钙双氢氧化物改性砂(CAS),分别以QS、AMS、CAS为滤料填充滤池进行挂膜,研究了不同石英砂表面的生物膜量、生物活性、胞外聚合物(EPS)的特性及对受污染原水的处理效果.结果表明,挂膜成功后CAS表面的生物活性最高,为42.00 mgO2/(g·h),生物膜量和胞外聚合物的含量最大,分别为12.43 mg/g、105.09 mg/(g·SS),对CODCr、NH4+-N的去除率分别稳定在58.20％、89.50％;AMS表面的生物活性、生物膜量、EPS平均含量分别为 32.97 mgO2/(g·h)、9.07 mg/g、93.41 mg/(g·SS),对 CODCr、NH4+-N 的去除率分别为 54.60％、85.10％.三种石英砂表面生物量分布均沿水流方向递减,EPS的含量从溶解性胞外聚合物(SL-EPS)到紧密附着性胞外聚合物(TB-EPS)呈上升趋势.
Abstract
Amino-modified sand(AMS)and aluminium-calcium double hydroxide modified sand(CAS)were pro-duced by modifying ordinary quartz sand(QS)with amino and aluminium-calcium double hydroxide,and QS,AMS and CAS were used as filter media to fill the filter cell for membrane suspension respectively.The results show that the high-est bioactivity of 42.00 mgO2/(g·h),the highest biofilm amount and extracellular polymer content of 12.43 mg/g and 105.09 mg/(g·SS),respectively,were obtained on the CAS surface after successful membrane suspension,and the re-moval rates of CODCr and NH4+-N were stable at 58.20％ and 89.50％,respectively.The bioactivity,biofilm volume and average EPS content of the AMS surface were 32.97 mgO2/(g·h),9.07 mg/g and 93.41 mg/(g·SS),respectively,and the removal rates of CODCr and NH4-N were 54.60％ and 85.10％,respectively.The surface biomass distribution of all three quartz sand species decreased along the direction of water flow,and the content of EPS showed an increasing trend from dissolved extracellular polymer(SL-EPS)to tightly adherent extracellular polymer(TB-EPS).
关键词
复合改性砂/生物砂滤池/挂膜/生物膜特性/受污染原水Key words
Composite modified sand/biological sand filter/biofilm formation/biofilm characteristics/micro-pollu-ted raw water引用本文复制引用
出版年
2024
NETL
NSTL
维普
万方数据