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《Planning》2014,(7)
本文采用粉末活性炭-微滤(PAC-MF)组合工艺处理微污染地表水,考察了组合工艺对水中典型污染的去除效果。试验结果表明,粉末活性炭与微滤组合工艺能显著降低微污染水源中CODMn、浊度和紫外吸光度值(UV254),其平均去除率分别为62.4%、97.6%和51.2%,采用PAC-MF组合工艺处理微污染地表水能够达到优良的出水水质,并能够显著提高膜通量。 相似文献
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针对目前饮用水源污染日益严重、在无自来水设施的地区生活用水水质得不到保障的现状,采用电凝聚工艺处理微污染地表水,考察了其对水源水中细菌、浊度、CODMn的去除效果,并在此基础上研制了便携式电凝夥膜一体化装置,采用该装置对东湖水和长江水进行了处理.出水水质符合城镇供水水质标准的要求。 相似文献
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采用SBR-化学絮凝-微滤分离膜对高浓度生活污水进行处理,SBR处理系统的运行周期为14h,好氧/缺氧时间比为1.5:1,HRT为15d。实验结果表明:SBR生物处理系统对有机物和NH4-N的去除效果显著;化学絮凝对磷酸盐的去除作用优良,硅藻土效果最佳;微滤分离膜能有效去除浊度和水体中的悬浮物。SBR-化学絮凝-微滤分离膜处理系统的出水水质优良,可满足市政杂用和生活杂用要求。 相似文献
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华南某微污染水处理厂总处理规模为260×104m3/d,为改善河道水质,需对原工艺进行升级改造,其核心控制指标为氨氮。通过对比曝气生物滤池、生物转盘、生物接触氧化、纯膜MBBR对处理微污染水氨氮的适用性,并综合考虑进出水水质、投资运维成本、施工难易程度等因素,最终选取纯膜MBBR工艺进行改造,将部分沉淀区改为纯膜MBBR区。分析了不同水力池型对悬浮载体流态的影响。采用侧进侧出微动力混合池型进行改造,改造后出水水质稳定,氨氮浓度低于0.5 mg/L,在沉淀时间缩短的情况下,TP去除率仍达到81%,优于排放要求;在处理水量长期超标情况下出水水质保持稳定,抗冲击负荷能力强。纯膜MBBR工艺路线简单、占地省,投资运维成本低,适于微污染水处理厂新建或改扩建。 相似文献
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水体富营养化给饮用水处理带来了很多难题。为了给水厂的升级改造提供参考,开展了预臭氧/常规/超滤组合工艺处理太湖水的试验研究,并分析了超滤膜的污染情况。试验结果显示:组合工艺出水浊度、CODMn、UV254、DOC的平均值分别为0.09 NTU、2.23 mg/L、0.039 cm-1、2.90 mg/L,总去除率分别为97.25%、34.41%、40.48%、28.55%。膜出水中大于2μm的颗粒数平均为16个/mL,未检测出细菌及大肠菌群。此外,组合工艺还能有效去除铁、锰及藻类,其出水含量低于标准限值。与原水直接进行超滤处理相比,组合工艺的跨膜压差增加更平缓。因此,该组合工艺可用于太湖微污染原水的处理。 相似文献
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粉末活性炭和超滤组合工艺处理低温低浊水试验研究 总被引:1,自引:0,他引:1
通过浸没式超滤试验考察了粉末活性炭和超滤组合工艺对低温低浊水的净水效能以及对膜污染的缓解作用,并对其机理进行探讨.试验结果表明,粉末活性炭和超滤组合工艺处理低温低浊水时,能够降低膜表面的负荷,对可逆污染和不可逆污染具有一定的缓解作用;粉末活性炭投加量为10mg/L时,粉末活性炭和超滤组合工艺出水的浊度低于0.06NTU,对CODMn,UV254的平均去除率分别为20.9%,25%,比单纯的超滤工艺的去除率分别提高了10%,15%. 相似文献
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A dual membrane UF/RO process for reclamation of spent rinses from a nickel-plating operation--a case study 总被引:1,自引:0,他引:1
The objective of this work was to conduct treatability studies on rinse wastewater from process lines of a typical nickel-plating plant for reuse. The study comprised of three steps: (1) a plant process review and the treatability of different combinations of simulated spent rinses in the laboratory; (2) a variability monitoring of a combined rinse at the plant and a treatability study on a combined rinse in the laboratory; (3) a pilot study for reclamation of the combined rinse on site. The study established an optimum dual membrane ultrafiltration (UF)/reverse osmosis (RO) process for treating a combined liquor of spent alkaline, acidic and nickel-plating rinses which resulted in a treated water of a quality suitable for reuse as substitute for town water for the purpose of rinsing. The results of this study provided a good guide to the selection of a UF pretreatment combined with an RO membrane unit as the treatment system. The pilot plant had successfully operated for 6 months, consistently producing a high quality product water (< 95 microS cm-1) at an overall water recovery of 67.5%. The quality of reclaimed water was better than town water used at the factory. The product water from the pilot plant has been used as substitute of town water for in-process rinsing at the factory with no detrimental effects for 3 months. 相似文献
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粉末活性炭/污泥回流工艺强化膜前预处理的研究 总被引:2,自引:1,他引:1
采用粉末活性炭(PAC)吸附/混凝沉淀/浸没式超滤膜组合工艺处理苏州市某河水,考察了PAC/污泥回流工艺对膜前预处理的强化效果及对膜污染的影响,并与常规混凝沉淀、污泥回流强化混凝沉淀、PAC吸附/混凝沉淀等3种预处理工艺进行了对比。结果表明,PAC/污泥回流强化预处理工艺对浊度、DOC、UV254和THMFP的去除率分别为80.2%、47.5%、42.3%和52.3%,均比其他预处理工艺的高,对MW30 ku和MW1 ku有机物的去除效果明显。PAC/污泥回流强化预处理和超滤膜组合工艺对浊度、DOC、UV254和THMFP的去除率分别可达到99.2%、54.1%、47.2%和60.2%;经过15 d的运行,超滤膜的跨膜压差基本保持稳定,而其他预处理工艺虽能在一定程度上减轻膜污染,但无法避免不可逆膜污染的发生。 相似文献
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The purpose of this study was to determine the comparative environmental impacts of coupled seawater desalination and water reclamation using a novel hybrid system that consist of an osmotically driven membrane process and established membrane desalination technologies. A comparative life cycle assessment methodology was used to differentiate between a novel hybrid process consisting of forward osmosis (FO) operated in osmotic dilution (ODN) mode and seawater reverse osmosis (SWRO), and two other processes: a stand alone conventional SWRO desalination system, and a combined SWRO and dual barrier impaired water purification system consisting of nanofiltration followed by reverse osmosis. Each process was evaluated using ten baseline impact categories. It was demonstrated that from a life cycle perspective two hurdles exist to further development of the ODN-SWRO process: module design of FO membranes and cleaning intensity of the FO membranes. System optimization analysis revealed that doubling FO membrane packing density, tripling FO membrane permeability, and optimizing system operation, all of which are technically feasible at the time of this publication, could reduce the environmental impact of the hybrid ODN-SWRO process compared to SWRO by more than 25%; yet, novel hybrid nanofiltration-RO treatment of seawater and wastewater can achieve almost similar levels of environmental impact. 相似文献