共查询到18条相似文献,搜索用时 109 毫秒
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分析了纯净水饮料行业反渗透系统膜元件劣化的原因.从预处理过痣环节的操作、反渗透运行条件优化管理与膜元件的选择等方面,针对性地阐释了过滤改善优化的原理,并提出了完善运行管理的建议措施. 相似文献
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锦州石化公司采用COBR(高级氧化与生物氧化组合工艺)组合工艺处理反渗透(RO)浓水,论述了COBR工艺流程、基本原理、工艺控制指标以及该工艺在锦州石化公司浓水处理装置的应用经验。结果表明,该工艺在一定的控制条件下,运行平稳,对RO浓水中的COD去除效果明显:COD去除率为57%;当进水浓度升高、波动较大时,该工艺仍具有很强的抗冲击能力:当进水浓度波动较大时,通过适当调节参数,出水COD仍可维持在50mg/L左右。 相似文献
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简要介绍了膜生物反应器(Membrane Bio-Reactor,MBR)的污水处理工艺流程,通过真空度表达式与有效汽蚀余量表达式分析了膜生物反应器中自吸泵汽蚀的主要原因是膜的脏堵、进水管路布置不合理导致进水条件不好、管路结垢导致总阻力损失增大和污水性状的改变等。通过将膜的反洗时间确定为每2h反洗一次、在线化学清洗时间确定为每100h清洗一次,SV30(污泥沉降比)控制在15%~25%,并减小膜与自吸泵间的管路长度、减少弯头和附件,运行条件变好,可以较好地解决自吸泵使用过程中的汽蚀问题。 相似文献
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针对炼化一体化污水处理工艺特点,结合水量、水质情况,选择了适合的炼油、化工污水处理与回用工艺处理流程,重点分析了各污水处理装置的工艺设计特色,包括根据水质不同采用不同的气浮及絮凝处理,在二沉池后设置承上启下的高密度沉淀池与V型滤池,回用水的双膜处理中选择浸没式超滤与一级三段反渗透,反渗透排水采用臭氧氧化加生物滤池的高效短流程。运行结果表明,一体化污水处理装置排水指标远优于GB 8978—1996《污水综合排放标准》的一级标准,污水与雨水的回用率合计70%以上。 相似文献
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本文总结了Inge多孔超滤膜在山西某再生水厂的中试情况,考察了UF系统的运行稳定性,出水水质和化学清洗情况,并对运行费用进行了初步估算.试验结果表明,Inge膜用于市政污水回用项目是可行的,出水水质合格,运行压力低,膜通量大. 相似文献
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试验研究了碟管式反渗透(DTRO)工艺中运行压力、进水温度及电导率对膜分离效果的影响,分析探讨了工艺对川西气田采出水生化处理产水COD、氨氮、氯化物等指标的截留分离效果。试验结果表明,当运行压力6~7MPa、进水温度24~25℃、电导率32000~40000μS/cm时,DTRO工艺对气田采出水COD、氨氮和氯化物的截留率分别达到95.54%,80%,98.78%,DTRO膜系统平均回收率达50%,减量化效果显著。同时,较单独低温多效蒸馏,热-膜耦合工艺运行成本降低19.75%,具有一定的经济效益。 相似文献
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中国石油宁夏石化公司采用循环喷淋洗涤技术回收尿素造粒塔粉尘,在该回收系统的运行过程中,存在排气中尿素粉尘含量偏高的情况,从设备管理和工艺优化等方面查找原因,制定应对措施并逐一进行实施,从而降低造粒塔排气中尿素粉尘的含量,减少空气污染,达到了污染减排的目的。 相似文献
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This paper presents result from an economic and technical point of view evaluation study, which has sought to establish the potential for replacing well-water that is currently used at the Piaggio industrial plant in Pontedera with recycled wastewater. The study is based upon a pilot wastewater treatment plant, which has been used to test wastewater treatment processes and to compare with achieved quality of recycled waters with that of water drawn on-site from physical/chemical pre-treatment and end with a reverse osmosis and air stripping stage. However, after the physical/chemical pre-treatment, the first option uses oxidation with ozone followed by activated carbon filtration, whereas the second method uses ultrafiltration. The first method is more effective at reducing chemical oxygen demand (COD) whereas the second method is more effective in removing bacteria. Nonetheless, both methods deliver water for re-use of a quality comparable with or better than that of well-water. In principle, the reverse osmosis permeate from either process could be re-used in all production phases at the industrial plant. However, the method base upon oxidation with ozone followed by activated carbon filtration is preferred, because, the process is simpler and continuous. The economic analysis of this process gives an estimated cost of Euro 0.55 per m3 for treated water. This compares favorably with other treatment processes and with the cost of other forms of water supply, which are projected to increase in any case. 相似文献
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凤眼莲在污水处理中的应用 总被引:2,自引:0,他引:2
叙述了水生植物凤眼莲的生活习性及生物特性,对污水的净化作用,有别于化学处理的各种特点及效果,在我国的发展前景以及使用中应注意的问题等。 相似文献
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Emily Yuhas 《Journal of Environmental Planning and Management》2006,49(4):571-585
Parts of the USA are facing impending shortages of freshwater. One proposed solution is the construction of desalination plants to turn seawater into freshwater. Although seawater desalination plants are widely used in the Middle East, especially Saudi Arabia, there are few desalination plants in the USA. In 2003, Tampa Bay Water built the largest desalination plant in North America. Persistent operating problems and escalating costs have caused the utility to re-evaluate its reliance on the seawater desalination plant as part of a long-term regional water supply strategy. In addition, environmental effects of the plant are uncertain. Advances in reverse osmosis technology have significantly reduced desalination costs. However, desalination of seawater is still more expensive than other freshwater supply sources and demand management measures. With time and research, seawater desalination may prove to be a sustainable, cost-effective source of new freshwater supplies, especially if plants are coupled with renewable energy sources. Until then, the development of small-scale groundwater desalination plants, the re-use of water, water conservation, and a more efficient allocation of water through higher prices and rising block rates will be important strategies in meeting growing water demand. Moreover, it is important to improve the coordination between water supply planning and land use planning as populations continue to increase. 相似文献