摘要
环境内分泌干扰物邻苯二甲酸酯(PAEs)在废水处理系统中广泛存在,难降解且易产生累积。PAEs的长期积累难以从废水处理工艺上解决。以序批式活性污泥(SBR)工艺处理人工配置的氨氮废水为例,考察PAEs存在条件下对SBR反应器运行的干扰。结果表明:随着原水中PAEs浓度增加,SBR反应器的活性污泥中,微生物最终能够以PAEs为唯一碳源;PAEs为10～150mg/L时,其浓度的变化对SBR反应器内活性污泥性状有明显影响,悬浮固体(MLSS)最终维持在2 000mg/L;随PAEs浓度的改变,SBR反应器内COD去除率变化不显著,而氨氮去除率随着PAEs浓度的升高而降低,最低值约为50%;亚硝态氮出现积累现象,积累量最高时接近60mg/L。
Phthalic acid ester（PAEs）,as an environmental endocrine disruptor,is a common pollutant in wastewater,which is prone to accumulate,and widespread in the wastewater treatment system.PAEs is a refractory organic matter which can be long-term accumulated in the reactor and difficult to degradation in the tradition wastewater treatment technology.In this research,sequencing batch reactor（SBR）activated sludge process was used to treat the manually simulated wastewater containing ammonia nitrogen.The results showed that：（1）with the increasing concentration of PEAs,the microbiological flora living in the activated sludge of the SBR were able to take PAEs as the sole carbon source finally.（2）With the concentration of PAEs increasing from 10 mg/L to 150 mg/L,the concentration of mixed liquid suspended solids（MLSS）maintained at 2 000 mg/L eventually.（3）With the increasing of the PAEs concentration,the efficiency of COD varied unsignificantly.However,the efficiency of ammonia nitrogen removal had the opposite result.The concentration of the ammonia nitrogen was decreased with the concentration of PAEs increasing,and the minium efficiency of ammonia nitrogen removal was about 50%.Finally,the nitrite nitrogen was accumulated in the SBR and the highest concentration was 60 mg/L.
作者
范荣桂
赵丹
王博文
尹利鹏
王世玉
姜清凤
张世强
邹京京
FAN Ronggui;ZHAO Dan;WANG Boatmen;YIN Lipeng;WANG Shiyu;JIANG Qingfeng;ZHANG Shiqiang;ZOU Jingjing(College of Environmental Sciences and Engineering,Liaoning Technical University,Fuxin Liaoning 123000)
出处
《环境污染与防治》
CAS
CSCD
北大核心
2018年第11期1279-1284,共6页
Environmental Pollution & Control
