• 关键词：曝气生物滤池  化学强化除磷  生物除磷  协同作用  生物膜  生物相

• 基金项目：广州市科技局科技攻关重大项目(No.2002Z1-E0022);广州市环保局市级污染防治专项资金项目(No.2000-001)

• 凌霄
• 华南理工大学环境科学与工程学院, 广州 510641

• 胡勇有
• 华南理工大学环境科学与工程学院, 广州 510641

• 马骥
• 华南理工大学环境科学与工程学院, 广州 510641

• 摘要：为了解投加铝盐后曝气生物滤池的除磷效果及其对去碳、硝化功能和生物膜、生物相的影响,通过同步比较在投加药剂和不投加药剂情况下小试曝气生物滤池的净化效果和生物膜结构特征、生物相组成.结果表明,当反应器水力负荷和进水总磷(TP)负荷分别为1.3m³·m^-2·h^-1和0.12～0.13kg·m^-3·d^-1时,TP的去除随铝盐投加量的增加而增加,但并不成正比例增加.投加铝盐后TP去除率可提高70%～86%.

• Abstract：To compare with the removal efficiency of total phosphate (TP) and the influence of chemical dosed onto the reactors on the removal of organic matter, ammonia nitrogen (NH₄⁺-N) and biofilm, two pilot-scale upflow biological aerated filters (UBAF), UBAF-1 with aluminum chloride and UBAF-2 without chemical agent, at hydraulic loading rate (HLR) of 1.3 m³·m^-2·h^-1 and TP loading rate of 0.12～0.13 kg·m^-3·d^-1 were operated synchronously using artificial water. The removal efficiency of TP in UBAF-1 was 70%～86% more than the one in UBAF-2.The results demonstrate that the removal efficiency of TP increases gradually disproportionatly with the increase of chemical dosing ratio (Al/P mol ratio). The suitable increase of gas/liquid ratio was in favor of removing TP as chemical dose ratio was less than or equal to 1.50. But the increase of gas/liquid ratio had almost no influence on the removal of TP when the chemical dosing ratio was higher than or equal to 1.75. The TP effluent concentration was less than 0.5 mg·L^-1 when the chemical dose ratio was more than 1.75 with gas/liquid ratio in range of 3～5.The same result could be achieved when chemical dose ratio was 1.50 with gas/liquid ratio of 7.The chemical dosing was advantageous to the removal of turbidity and COD, which contributed respectively 4%～7% and 5%～13% reduction, but it had little influence on the removal of NH₄⁺-N. Many mesh-structure flocs were observied on the surface of the media near the inlet, but few on the surface of the media near the outlet of UBAF-1. Aluminum chloride precipitations have little effect on the species and quantities of microorganism.

• Key words：biological aerated filter  chemical enhancement phosphorus removal  biological phosphorus removal  synergistic  biofilm  biofacies

• 
  摘要点击次数： 2422 全文下载次数： 3577