共查询到20条相似文献,搜索用时 125 毫秒
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针对工业园区电镀废水处理中生化指标达标难的问题,采用新型聚四氟乙烯(PTFE)膜组件构建膜生物反应器(MBR),通过现场试验研究了MBR工艺处理电镀废水的实际效果。结果表明,通过合理的维护管理,MBR膜通量能稳定维持在16.67L/(m2·h)左右,对COD的去除率可达到50%以上,出水COD质量浓度稳定在80mg/L以下,但对氨氮的去除效果受水力停留时间(HRT)、温度、系统负荷等因素的影响较大。与传统的生物接触氧化工艺相比,基于新型膜材料的MBR工艺可以大大提高污泥量,避免结垢和出水跑泥等问题,提高了处理效果。从投资运行费用来看,采用MBR工艺的总投资费用高于普通生化处理工艺,运行费用约为2元/t。 相似文献
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Fenton试剂-MBR工艺处理环氧增塑剂化工废水的研究 总被引:2,自引:0,他引:2
针对含有H2O2的环氧增塑剂化工废水,采用Fenton-膜生物反应器(MBR)工艺进行处理。研究了不同的Fe2+的投加量和反应时间对Fenton试剂处理废水的影响,讨论了不同水力停留时间(HRT)和进水COD浓度对MBR处理废水效率的影响。由结果可得,当Fenton试剂中Fe2+投加量1.1 g/L、反应时间3 h、MBR的HRT 30 h和MLSS 7000~8000 mg/L时为最佳操作条件。处理出水CODCr为150~250 mg/L,总COD去除率为94%。 相似文献
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以实际焦化废水为研究对象,考察了序批式MBR-RO复合系统对该类废水污染物的处理效果。结果表明,序批式MBR-RO系统可成功应用于焦化废水常规预处理后的直接处理,COD去除率稳定在93%以上,反渗透出水COD平均为28.7 mg/L;TN去除率稳定在96%以上,反渗透出水TN平均质量浓度为4.53 mg/L。对于废水中酚类和氰化物的有毒污染物,MBR-RO系统出水质量浓度分别为0.24 mg/L和0.02 mg/L,反渗透浓缩倍数分别达到3.85倍和4.53倍,实现了该类有害物质的浓缩回收。此外,实验以膜的临界通量作为连续运行的初始条件,在连续60 d的运行过程中,MBR比膜通量损失65.3%,RO比膜通量损失73.2%。 相似文献
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复合式MBR处理涤纶碱减量废水的试验研究 总被引:2,自引:0,他引:2
以柔性多孔颗粒作为填料组成的复合式膜生物反应器(MBR)处理涤纶碱减量废水.结果表明,在控制HRT不变的条件下,进水COD从812.35 mg/L提高到1 621.24 mg/L,系统出水COD为26.60~68.03mg/L.系统的COD总去除率均在95%左右.有机负荷冲击对处理效果影响不大.膜组件有效截留有机污染物,确保系统稳定出水.复合膜生物反应器中的生物去除率略高于普通MBR.柔性填料对减轻膜污染贡献明显,相同运行条件下,使最终透膜压差比普通MBR小28.3kPa. 相似文献
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膜法处理石化废水探索研究 总被引:2,自引:0,他引:2
以膜生物反应器(MBR)和膜混凝反应器(MCR)分别处理石化污水厂水解池出水和二沉池出水.结果发现水力停留14.5 h,DO约4 mg/L时,MBR对石化废水的化学需氧量(COD)去除率达到88 %,膜出水COD为71.3 mg/L.以MCR对污水厂出水进行深度处理,发现PAC约10 mg/L为最佳投药量,此时COD去除率达到32 %,膜出水COD为75.6 mg/L.以两种微滤膜反应器出水进行淤泥密度指数(SDI)实验,SDI在3~5之间,可以作为RO进水,但为了RO系统的稳定运行,应进一步对出水进行深度处理. 相似文献
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采用混凝沉淀+水解酸化+膜生物反应器(MBR)+过滤+反渗透(RO)组合工艺,对某电镀企业生产废水进行深度处理和回用。首先通过混凝沉淀、生化和过滤去除重金属、有机物和悬浮物,然后利用RO系统去除剩余的有机物和盐分。实际运行结果表明,RO淡水水质可满足企业生产工艺用水水质要求,RO浓水水质达到了《电镀污染物排放标准》(GB 21900—2008)表2中的新建企业水污染物排放限值。 相似文献
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《Desalination》2007,202(1-3):129-134
Generally, membrane biofilm have been believed to be minimized during the operation of membrane bioreactor (MBR) for wastewater treatment and reuse. In this study, positive roles of membrane biofilm in the intermittently aerated MBR system were highlighted. During the long-term operation using real domestic wastewater, membrane biofilm played secondary filtration barrier for both low and high molecular weight organic matters. The biofilm on the membrane surface was responsible for the removal of low molecular weight organic matters by the use of easily degradable organic matters (i.e. <1 kDa) as microbial carbon and energy sources during the filtration. Also, track study showed that the significant denitrification took place by the membrane biofilm, proved by the degradation of carbon source and increase of alkalinity such as inorganic carbon. Nevertheless the necessity of further study, this study will give unique insight into positive roles of membrane biofilm, and also continue to aid both fundamental studies and developments of MBR processes. 相似文献
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该文采用混凝沉淀、MBR和反渗透组合工艺装置针对平面显示面板生产有机废水进行深度处理。结果表明通过混凝沉淀,有机废水中的 COD能降低约10%,并减轻后续 MBR膜的有机物污堵。MBR装置出水能保持良好水质(TOC <10 mg/L、SDI15<3),很适合采用反渗透进行进一步处理。通过反渗透装置进行深度处理后,出水能达到TOC<1 mg/L、电导率<85μs/cm,可作为原水直接回用到超纯水制备系统。 相似文献
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The significant improvements of membrane technology in reliability and cost effectiveness have increased the reuse probability and recycling extent of dairy wastewater. However, membrane fouling still remains a major bottleneck in wide application. In order to solve the problem, this paper investigated the possibility and applicability of coagulation-membrane bioreactor (MBR) hybrid system in reclaiming dairy wastewater. A comparative experiment based on the removal efficiencies and the membrane performance was designed to achieve the purpose. The results showed that polyaluminium chloride as the appropriate coagulant in coagulation process was effective for turbidity removal. Coagulation process played a very important role in stabilizing the effluent of MBR and the level of transmembrane pressure. MBR was a crucial process in turbidity and aluminum removal. MBR had the capability to resist shock loading and to maintain the high COD removal. Biological flocs in MBR could improve the fouling level of membrane. The hybrid system reduced 98% COD from the original and COD value of the wastewater came down to 8 mg/L. The combination of coagulation with MBR presents the possibility and applicability to reclaim effluent in dairy industries. 相似文献