混凝-沉淀与混凝-气浮用于海水浸没式膜过滤的对比研究

发布时间：2018-04-26 10:39

本文选题：气浮 + 沉淀　；参考：《水处理技术》2016年12期

【摘要】：采用混凝-沉淀-SMF和混凝-气浮-SMF对渤海湾海水进行净化处理,考察了2种工艺作为反渗透海水淡化预处理的净化效果及运行稳定性。结果表明,气浮或沉淀后的海水经SMF处理,出水浊度均小于0.3 NTU,颗粒物去除率在98%以上,总铁质量浓度小于0.1 mg/L,SDI_(15)稳定在1左右,COD_(Mn)小于1 mg/L,达到了反渗透膜的进水水质要求;但是混凝-沉淀-SMF的膜比通量衰减速度明显小于混凝-气浮-SMF,且反洗后膜比通量恢复率较高。从出水水质、运行稳定性和经济性上考虑,混凝-沉淀-SMF优于混凝-气浮-SMF。
[Abstract]:Coagulation-precipitation -SMF and coagulation-air floatation -SMF were used to purify the Bohai Bay seawater. The purification effect and operational stability of the two processes as the pretreatment of reverse osmosis seawater desalination were investigated. The results showed that after SMF treatment, the turbidity of effluent was less than 0.3NTU, the removal rate of particulate matter was more than 98%, and the total iron content concentration was less than 0.1 mg / L SDII-15), which was less than 1 mg 路L ~ (-1) 路L ~ (-1), which met the requirement of influent water quality of reverse osmosis membrane. However, the membrane specific flux attenuation rate of coagulation-precipitation -SMF is obviously lower than that of coagulation-air floatation -SMF, and the recovery rate of membrane specific flux is higher after backwash. Considering the effluent quality, operation stability and economy, the coagulation-precipitation -SMF is superior to the coagulation-air floatation -SMF.
【作者单位】：天津城建大学环境与市政工程学院天津市水质科学与技术重点实验室;中冶海水淡化投资有限公司;
【基金】：“十二五”国家科技支撑计划(2012BAB17B02)
【分类号】：P747

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