共查询到20条相似文献,搜索用时 125 毫秒
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沉水植物对水中氮、磷的去除效果 总被引:1,自引:0,他引:1
通过静态模拟试验,研究了水蕴草[Elodea densa(Planch.)Casp.]、金鱼藻(Ceratophyllum demersum L)、绿菊(Cabomba carliniana)3种沉水植物在不同营养浓度条件下(中、富、超富和胁迫浓度)对水中氮、磷的去除效果及其生物量的变化。结果表明,在不同营养浓度条件下,3种沉水植物均能去除水体中的氮、磷营养物质。其中,在前3种营养条件下金鱼藻对水中的TN有较好的去除效果,水蕴草在胁迫营养浓度条件下对水中氮的脱除效果较好;水蕴草在4种条件下对水中的TP有较好的去除效果,尤其是在超富营养和胁迫浓度条件下,去除效果远远好于其它两种植物。 相似文献
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介绍了臭氧氧化法去除工业废气中的硫化氢、硫醇的试验情况,考察了臭氧浓度、停留时间和催化剂等不同因素对去除率的影响。试验结果表明能达到较好的去除效果,硫化氢、硫醇的最终氧化产物可以不是二氧化硫,而是凝聚态的硫化物。 相似文献
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草浆木质素做混凝剂处理工业废水的试验研究 总被引:6,自引:0,他引:6
用草浆造纸黑液提取木质素做混凝剂对毛纺厂、印染厂、染料厂废水进行脱色、去除CODCr试验研究,表明草浆木质素是一种有前途的混凝剂,对纺织、印染、染料厂废水中CODCr及色度具有较好的去除效果。该方法以废治废,具有较好的社会效益和经济效益。 相似文献
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膜分离技术在饮用水处理中的应用 总被引:11,自引:0,他引:11
国际水协会(IWA)于2004年6月在韩国汉城召开了主题为”水环境.膜技术”会议,会议发表论文135篇,还有69篇招贴论文。会议就膜技术用于饮用水处理、生活污水处理、工业废水处理及膜污染和模型建立等方面展开交流。本文主要介绍了该会议报道的膜技术在饮用水处理中的应用与研究动态。所有报道表明用微滤/超滤及其与其它工艺组合生产饮用水是非常有前景的水处理技术,对悬浮颗粒、胶体物质和有机物有很好的去除效果,还能去除藻类及DBPs等。文中最后介绍了防止膜污染的措施。 相似文献
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原水颗粒物对超滤膜通量的影响及其污染机理 总被引:1,自引:0,他引:1
随着原水水质的日益恶化和水厂出水指标逐渐严苛,自来水厂常规处理工艺面临着严峻的考验与挑战。超滤膜技术在现有水厂技术改造及深度处理扩建领域具有广泛的应用空间和价值。不同类型、浓度的原水颗粒物对超滤膜通量及污染机理的影响存在明显的差异。该文针对原水颗粒物的类型和浓度,开展系统的试验研究与分析,以便为超滤膜在自来水厂提标改造工程中的应用提供理论依据。 相似文献
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T. Venkatesh 《分离科学与技术》2017,52(14):2262-2273
The membrane-based grey water treatment for grey water reuse and surfactant recovery is presented in this research paper. Grey water from washing machine discharges having turbidity and used surfactant was processed through the polymeric ultrafiltration (UF) membrane to remove the turbidity. The UF treated grey water is further purified by reverse osmosis (RO) membrane for surfactant recovery and water reuse. The surfactant trapped inside the RO spiral wound membrane module is recovered through various membrane physical regeneration techniques such as backwashing, simultaneous backwash–back-flush and ozone back-flush. Among this, backwash–back-flush is found to be effective process for surfactant recovery. The methodology for optimising surfactant recovery is captured by studying effect of various operating parameters such as feed detergent concentration, backwash pressure, backwash temperature and back-flush flow rate. By implementing optimal process conditions, the integrated UF and RO membrane process is able to produce 300 L of reusable pure water and 80 L of concentrated detergent solution and 20 L of turbid water while treating 400 L of grey water discharges. Maximum surfactant recovery of 82% is obtained while treating grey water which consists of 720 ppm of total dissolved solids (detergent) and 45 ppm of surfactant. The extent of UF and RO membrane fouling is determined by measuring the pure water flux before and after the grey water treatment. The membrane performance is found to be stable when membrane is regenerated by backwash–back-flush technique for RO and gravity backwash for UF membrane. 相似文献
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Study of drinking water treatment by ultrafiltration of surface water and its application to China 总被引:3,自引:0,他引:3
In China, many water supplies depend on conventional water treatment. Due to unfit soil and water conservationin some regions of China, conventional water treatment has showed some defects for the poor quality of water resource. In addition, advances in membrane technology and increasing requirements on water quality have stimulated ultrafiltration (UF) for water treatment. In this research, OF test apparatus was set up to produce drinking water from raw water of the Binxian Reservoir (China). The performance of UF membranes was investigated. There was a linear relationship between membrane resistance and accumulated permeate water. Using coagulation before OF increased permeate flux and retarded membrane flux decline. Surprisingly, membrane permeate flux in a coagulation/UF process was higher than that in coagulation-sand filtration-UF process with raw water of medium turbidity. OF treatment provided effective turbidity removal. Iron, manganese and aluminum were removed completely. The UF membrane also perfectly removed all coliform bacteria. The reduction of total organic carbon was satisfactory. The treated water quality complied with China's drinking water guidelines. The Ames test showed that the mutagenic activities of membrane permeate water was negative. 相似文献
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UF膜活性炭组合工艺自来水处理研究 总被引:1,自引:0,他引:1
本实验采用超滤与粉末活性炭组合工艺,研究了粉末活性炭的投加对超滤膜运行性能的影响,结果表明:随粉末活性炭投量的增加膜稳定运行时间延长,通量下降率降低。粉末活性炭的投加对膜过滤阻力影响不大。采用粉末活性炭和超滤组合工艺处理饮用水,调整适合的参数,其中CODMn、UV254、TOC和浊度的平均去除率分别为67%、56%、76%和98%以上,粉末活性炭超滤膜组合工艺可用于制备优质饮用水。 相似文献
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