| 低温下A2/O-BAF反硝化除磷脱氮特性 |
| 摘要点击 3563 全文点击 1223 投稿时间：2018-02-24 修订日期：2018-04-08 |
| 查看HTML全文
查看全文 查看/发表评论 下载PDF阅读器 |
| 中文关键词 低温 低C/N 曝气量 有效填料高度 反硝化除磷脱氮比例(ΔPO43-/ΔNO3--N) 曝气生物滤池 |
| 英文关键词 low temperature low C/N aeration flow effective packing height ratio of denitrifying phosphorus to nitrogen (ΔPO43-/ΔNO3--N) biological aerated filter (BAF) |
|
| 中文摘要 |
| 在11~14℃低温下，采用A2/O-BAF系统处理低C/N生活污水，研究了污染物去除特性、反硝化除磷过程中除磷脱氮比例（ΔPO43-/ΔNO3--N）以及BAF中曝气量和有效填料高度对硝化反应的影响.结果表明，在COD、NH4+-N、TN和PO43-的平均进水浓度分别为193.1、58.6、60.3和5.1mg·L-1时，平均出水浓度分别为46.3、2.5、13.4和0.3mg·L-1，达到国家城镇污水处理厂污染物排放标准一级A标准.对ΔPO43-/ΔNO3--N进行线性拟合，比值分布在0.47~1.75之间；运用正态分布对ΔPO43-/ΔNO3--N进行数理统计，其均值为1.20，标准差0.29.BAF中曝气量为60 L·h-1和100 L·h-1，出水NH4+-N浓度小于5.0mg·L-1时所需填料高度分别为1.8 m和1.0 m；继续增大BAF中曝气量为120 L·h-1时，气水流冲击导致生物膜脱落，造成出水NH4+-N大于5.0mg·L-1. |
| 英文摘要 |
| Low C/N domestic sewage was treated by an A2/O-biological aerated filter (BAF) system at low temperatures (11-14℃). The characteristics of pollutant removal, the ratio of denitrifying phosphorus to nitrogen (ΔPO43-/ΔNO3-N) and effects of aeration flow and effective packing height on nitrification in BAF were studied. The results showed that when the average influent concentrations of COD, NH4+-N, TN and PO43- were 193.1, 58.6, 60.3 and 5.1 mg·L-1 respectively, their effluent concentrations were 46.3, 2.5, 13.4 and 0.3 mg·L-1 respectively, which met the first level A criteria specified in the discharge standard of pollutants for municipal wastewater treatment plant (GB 18918-2002). The linear fitting of ΔPO43-/ΔNO3--N was between 0.47 and 1.75. The normal distribution of mathematical statistics was applied-and the average standard deviation for ΔPO43-/ΔNO3--N were 1.20 and 0.29 respectively. When the aeration flows were 60 L·h-1 and 100 L·h-1, the effluent concentration of NH4+-N was less than 5.0 mg·L-1, corresponding to the effective packing heights in the BAF of 1.8 m and 1.0 m respectively. However, when the aeration flow was increased to 120 L·h-1, the air-water flow led to biofilm detachment, which caused the effluent concentration of NH4+-N to increase beyond 5.0 mg·L-1. |
|
|
|
