悬浮陶粒组合生物滤池工艺化学强化除磷实验研究  

Experimental Research on Chemically Enhanced Phosphorus Removal by Suspended Ceramsite/Bio-Filter Combined Process

作　　者：夏莉 陆少鸣 李嘉树 徐姮 江荻 

机构地区：[1]华南理工大学环境与能源学院,广东广州510006

出　　处：《水处理技术》2018年第3期114-117,共4页Technology of Water Treatment

基　　金：国家重点研发计划(2016YFC0400705)

摘　　要：以西部农村生活污水为研究对象,采用化学除磷强化前置反硝化悬浮陶粒曝气生物滤池工艺脱氮除磷的效果,考察在不同投加点处三氯化铁的投加量下对工艺的影响。结果表明,无论是同步加药还是后置加药都能有效的降低出水中TP的含量,且投加量越大,对磷的去除率越高;投加量对于COD、NH_4^+-N、TN的去除影响不大,即三氯化铁投加对工艺的影响较小。相同投加量下,同步化学除磷的处理效果明显优于后置化学除磷,采用同步化学除磷三氯化铁的投加量为60 mg/L时,此时出水的COD和NH_4^+-N、TN、TP的质量浓度平均分别为32.38 mg/L和1.18、10.45、0.39 mg/L,均满足GB 18918-2002的一级A标准,且曝气池水头损失变化较小,对滤池反冲洗周期影响不大。The western rural domestic wastewater was used as the research object,efficiency of nitrogen and phosphorus removal by pre-denitrification/suspended ceramsite/BAF combined process was enhanced by chemical phosphorus removal.The effect of ferric trichloride dosage in different dosing point on process was studied.The results showed that,both synchronous and rear medicine dosing could effectively reduce the TP content in effluent,the larger of the dosage the higher of the phosphorus removal rate,and the dosage had little effect on COD,NH4~＋-N,TN removal which meant ferric trichloride had little effect on the process.With the same dosage,the synchronous chemical phosphorus removal effect was superior to the post chemical phosphorus removal,the optimal dosage of ferric trichloride in synchronous chemical phosphorus removal process was 60 mg/L,the average COD and mass concentration of,NH4~＋-N,TN,TP in effluent was 32.38 mg/L and 1.18 mg/L,10.45 mg/L,0.39 mg/L,respectively,which met the first level A standard of GB 18918-2002.And the change of head loss in aeration pool was small,which had little effect on the filter backwash cycle.

关 键 词：前置反硝化 悬浮滤料 曝气生物滤池 化学除磷 

分 类 号：X703.1[环境科学与工程—环境工程]