摘要
采用3种正渗透膜对厌氧-缺氧-好氧(AAO)工艺二沉池出水中的磺胺甲恶唑进行截留效果研究。结果表明,活性层朝汲取液的压力阻尼渗透(PRO)模式下磺胺甲恶唑截留率大于活性层朝原料液的正渗透(FO)模式。NaCl是截留磺胺甲恶唑适合的汲取液溶质。随着汲取液含量升高,3种膜对磺胺甲恶唑截留效果有所提高,但增幅逐渐减小,且高含量的汲取液会引起严重的盐返混;流速对于聚酰胺活性层聚酯筛网结构的TFC-ES膜的影响比醋酸纤维素活性层(CTA)膜影响显著,醋酸纤维素活性层聚酯无纺布结构的CTA-NW膜随着膜两侧流速的增加对磺胺甲恶唑截留率反而下降。在正渗透实验中,醋酸纤维素活性层聚酯筛网结构的CTA-ES膜对磺胺甲恶唑的截留率始终高于CTA-NW膜和TFC-ES膜。
The rejection of sulfamethoxazole in secondary effluent of an Anaerobic-Anoxic-Oxic（AAO） by l forward osmosis（FO） membranes was investigated. The results showed the rejection of sulfamethoxazole in the PRO mode was higher than that in the FO mode. NaCl was the most suitable draw solute for sulfamethoxazole rejection. As draw solution content increased, the increase of sulfamethoxazole rejection increased slowly, and high draw content caused serious reverse salt flux. Effect of flow velocity on a thin-film composite with embedded polyester screen（TFC-ES） is more significant than on the cellulose triacetate（CTA） membrane and the cellulose triacetate with a cast nonwoven（CTA-NW） membrane displayed a lower rejection as the flow velocity increased. The rejection of sulfamethoxazole increased with water flux, but high reverse salt flux may result in decrease of sulfamethoxazole rejection. The cellulose triacetate with embedded polyester screen（CTA-ES） membrane showed constantly higher sulfamethoxazole rejection than that of CTA-NW membrane and TFC-ES membrane.
出处
《水处理技术》
CAS
CSCD
北大核心
2016年第5期8-11,22,共5页
Technology of Water Treatment
基金
国家自然科学基金(21477018
21007010)
交通运输部科技项目(2010353343290)
中央高校基本科研业务费专项
关键词
正渗透膜
截留率
磺胺甲恶唑
NACL
再生水
forward osmosis membrane
rejection
sulfamethoxazole
NaCl
reclaimed water
