摘要
在好氧生物滤池水力负荷为3．0m^3／（m^2·h），温度为20-25℃，缺氧柱投加碳源量为60mg／L，将气水比分别控制为1：1、2：1、3：1、4：1，以污水厂二级出水为进水水源，考察了气水比对多级曝气生物滤池系统去除CODCr、氨氮、TN等效果的影响。结果表明：气水比对一级好氧生物滤池系统处理效能影响显著。当气水比从1：1提高到3：1时，一级好氧生物滤池对CODCr、氨氮的去除率明显提高，分别从22．26％提高至34．46％和35．06％提高至63．98％；对TN的去除率明显降低，从8．6％降低至4．8％；当气水比继续增大到4：1时，CODCr、氨氮及TN的去除率基本保持稳定，分别为36．66％、68．66％和4．7％。
Impact of air-to-liquid ratio on removal efficiency of CODCr .NH4＋-N and TN were investigated in multistage BAF, under the conditions of hydraulic load of3.0m^3/ （m^2· h）, temperature of 20-25℃, C sources addition of 60mg/L in anoxic filter column, air-to-liquid ratio of 1：1,2：1,3：1 and 4： 1. The result shows that the air-to-liquid ratio has significant effects on removal efficiency of BAF. When the air-to-liquid ratio increased from 1：1 to 3： 1, the removal rate of CODCr and NH^4＋-N have markedly improved in the first stage aerobic biological filter, increased from 22.26% to 34.46% and 35.06% to 63.98% respectively, the removal rate of TN has significantly decreased, decreased from 8.6% to 4.8%. when the fir-to-liquid ratio continued to increase to 4：1, CODCr, the removal rate of NH^4＋-N and TN remained stable at 36.66%, 68.66% and 4.7%.
出处
《重庆建筑》
2011年第10期48-51,共4页
Chongqing Architecture
关键词
气水比
多级曝气生物滤池
强化污水处理
fir-to-liquid
Multistage Biological Aeration Filter
advanced treatment ofwastewater
