共查询到20条相似文献,搜索用时 78 毫秒
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正美国Dow化学公司采用超滤与反渗透技术,可将美国德克萨斯州页岩气水力压裂开采现场产生的回注水和油污染水通过净化再生利用。由于该地区水源不足、土壤干燥,回注水和油污染水的再生利用受到好评。Dow公司的子公司在该地区采用超滤技术和反渗透技术制造的可移动水处理装置"HIPPO"已开始投入使用。该装置可以把在开采现场产生的油 相似文献
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采用“机械加速澄清—重力式过滤—离子交换—除碳—高效反渗透” 工艺处理某电厂废水,将反渗透产水作为冷却塔补水。运行结果表明:弱酸阳离子交换器出水碱度≤0.10 mmol/L、硬度≤0.02 mmol/L、浊度≤0.2 NTU,满足高效反渗透对进水水质的要求;高效反渗透产水浊度<0.1 NTU,CODMn≤0.08 mg/L,硬度≤1.12 mg/L,碱度≤8.40 mg/L,ρ(总铁)<10 μg/L,ρ(总硅)<0.5 mg/L,电导率<45 μS/cm,出水水质满足回用要求。针对该系统存在的自用水率高、过滤器污堵以及水量不平衡等问题提出了相应的建议。 相似文献
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结合天津第一热电厂给水处理技改工程实例,针对海河水质具有的微污染、低温低浊、富营养化特点,对采用反渗透预脱盐系统的预处理工艺进行分析探讨,并对目前预处理设施改造方案的可行性方案提出建议,为类似工程工艺设计提供参考。 相似文献
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李亚利 《再生资源与循环经济》2015,(4):39-41
在水资源紧缺和水污染日益严重的今天,针对某炼化厂的清净废水,实施了"预处理+超滤+反渗透"的深度处理工艺。实践证明该法具有出水水质好、运行稳定、能耗低的特点,本项目的成功实施,实现了节约用水和保护环境的双重目的。 相似文献
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通过对锅炉补给水处理系统中反渗透装置的多次化学清洗,结合水质条件和运行实际情况,提出反渗透膜清洗药品选型和反渗透膜清洗措施,并对反渗透装置运行及清洗存在的问题进行了总结,为同类清洗反渗透装置在运行效果、清洗效果以及延长膜运行寿命方面提供参考。 相似文献
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印染废水主要含有染料、浆料、助剂、酸碱、纤维杂质及无机盐等 ,具有成分复杂、高浓度、高色度、难降解等特点。该类废水的治理首先要解决脱色问题 ,目前常用的脱色处理方法有中和法、氧化法、吸附法、反渗透法、混凝法等。有机阳离子絮凝剂PDA是一种新型、多功能性高分子聚合物 ,与其他阳离子聚丙烯酰胺类絮凝剂相比 ,具有阳离子单元结构稳定、高效、无毒、使用不受 pH变化的影响等优点 ,广泛用于石油开采、造纸、纺织印染、日用化工及水处理领域。南京理工大学化工学院将PDA应用于处理经生化、未经生化处理的活性染料和分散染料的印染… 相似文献
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针对某厂多介质过滤-超滤-反渗透(MMF-UF-RO)废水深度处理工艺发生污堵的问题, 采用在MMF装置前加入NaOH混凝沉淀的改进工艺代替加入聚合氯化铝(PAC)絮凝剂的原工艺.模拟原工艺水样的初始UF膜通量较低,过滤后UF膜通量下降35%左右;模拟改进工艺水样的初始UF膜通量较高,且UF膜通量基本无变化.改进工艺UF装置出水中除SiO_2外,其他物质的质量浓度远小于原工艺UF装置出水,可有效改善RO装置的进水水质.改进工艺的MMF和UF的运行稳定性均明显优于原工艺. 相似文献
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《Waste management & research》1991,9(5):379-387
Experiences gained from full-scale evaluation of advanced treatment processes used for reclaiming wastewaters should help in the evaluation of potential treatment systems for treatment and reuse of water in space. Water Factory 21 is a 0.66 m3s−1 (15 million gallons per day) water reclamation plant in California that has been in operation since 1976. The plant receives biologically treated wastewater. Lime treatment is effective for removal of heavy metals. Volatile organic constitutes are efficiently removed by air stripping. Non-volatile organic constituents are removed by activated carbon adsorption and reverse osmosis (RO). RO is a highly effective polishing step, and removes most of the remaining materials including inorganic salts, heavy metals, and organics. RO removed 85% of the total organic carbon, down to about 1 mg 1−1, which is lower than in many treated drinking waters. The series of treatment processes used insured virus and pathogen removal, with lime treatment and chlorination together proving highly effective. Sufficient data has been collected to provide statistically reliable confidence limits to be set on the performance of each unit process. 相似文献
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Advanced physico-chemical treatment experiences on young municipal landfill leachates 总被引:19,自引:0,他引:19
Ozturk I Altinbas M Koyuncu I Arikan O Gomec-Yangin C 《Waste management (New York, N.Y.)》2003,23(5):441-446
In this study, Membrane Filtration (UF+RO), Struvite (MAP) precipitation and ammonia stripping alternatives were studied on biologically pre-treated Landfill Leachate. The results indicated that the system including the Upflow Anaerobic Sludge Blanket Reactor (UASBR) and Membrane Reactors (UF+RO) has been offered as an appropriate treatment alternative for young landfill leachates. This system provided high removals of COD, colour and conductivity (>98-99%). For ammonia removal, struvite precipitation was applied at the stoichiometric ratio (Mg:NH4:PO4=1:1:1) to anaerobically pre-treated raw landfill leachate effluent having an influent ammonium concentration of 2240 mg/l. Maximum ammonium nitrogen removal was observed as 85% at pH of 9.2. In ammonia stripping following 2 h of aeration, the removal was 72% at pH=12 while the removals were around 20% at pH=10 and pH=11. When membrane reactor, and struvite precipitation or ammonia stripping was applied to anaerobically pre-treated effluents, the results indicated that each system could be used as an appropriate post-treatment option for young landfill leachates. In economic aspect, ammonia stripping was found as the cheapest alternative with high ammonium removal. However, when both high COD and ammonium removals were to be achieved membrane technology such as UF+RO (SW) could be considered as the most appropriate system due to the fact that COD removal could be obtained very low by ammonia stripping. 相似文献
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采用“混凝沉淀-微滤-组合反渗透”工艺对某煤化工企业的高盐废水进行浓缩处理,浓水通过蒸发结晶进行脱水,产水采用常规反渗透进行水回收。运行结果表明,经30 d运行,水回收率保持在85%以上,脱盐率稳定在95%以上,常规反渗透产水水质稳定,产水电导率、浊度、Cl-质量浓度和COD的平均值分别为12.5 μs/cm,0.1 NTU,7.8 mg/L,1.8 mg/L,满足《炼化企业节水减排考核指标与回用水质控制指标》(Q/SH0104-2007)中污水回用于循环冷却水的水质指标和设计产水水质要求,实现了废水的近“零排放”。 相似文献
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According to current environmental legislation concerned with water scarcity, paper industry is being forced to adopt a zero liquid effluent policy. In consequence, reverse osmosis (RO) systems are being assessed as the final step of effluent treatment trains aiming to recover final wastewater and reuse it as process water. One of the most important drawbacks of these treatments is the production of a retentated stream, which is usually highly loaded with biorecalcitrant organic matter and inorganics; and this effluent must meet current legislation stringent constraints before being ultimately disposed. The treatment of biorefractory RO retentate from a paper mill by several promising advanced oxidation processes (AOPs) - conventional Fenton, photo-Fenton and photocatalysis - was optimized considering the effect and interaction of reaction parameters; particularly using response surface methodology (RSM) when appropriate (Fenton processes). The economical cost of these treatments was also comparatively assessed. Photo-Fenton process was able to totally remove the COD of the retentate, and resulted even operatively cheaper at high COD removal levels than conventional Fenton, which achieved an 80% reduction of the COD at best. In addition, although these optimal results were produced at pH=2.8, it was also tested that Fenton processes are able to achieve good COD reduction efficiencies (>60%) without adjusting the initial pH value, provided the natural pH of this wastewater was close to neutral. Finally, although TiO(2)-photocatalysis showed the least efficient and most expensive figures, it improved the biodegradability of the retentate, so its combination with a final biological step almost achieved the total removal of the COD. 相似文献
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为了解决砷化镓生产废水含有磷酸盐、氟化物、砷化物以及难沉降亚微米级悬浮物的处理难点,首先采用催化臭氧氧化—好氧生化深度预处理废水,再采用RO膜分离工艺进行处理。结果表明:催化臭氧氧化法使废水中亚微米级悬浮物脱稳,有利于悬浮物的混凝沉降,并优化了膜分离阶段的分离环境,可延长膜使用寿命,降低运行成本;经过膜分离后,出水砷质量浓度为0.01 mg/L,氟质量浓度为1.0 mg/L,COD、TP、TN和ρ(NH3-N)为10,0.01,0.50,0.50 mg/L,均达到《地表水环境质量标准》(GB3838—2002)Ⅲ类水质标准。 相似文献