共查询到19条相似文献,搜索用时 62 毫秒
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聚丙烯中空纤维膜生物反应器处理生活污水实验研究 总被引:1,自引:0,他引:1
在膜生物反应器中使用聚丙烯中空纤维膜材料的膜组件,可以解决以往其它材料寿命短、强度低、易污染等问题。利用这种膜生物反应器处理生活污水,其出水水质达到回用水标准,CODcr小于25mg/L;NH3-N小于5mg/L;浊度小于0.6NTU,可以回用于冲厕、绿化用水及河湖补充水。 相似文献
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本文介绍了浙江大学膜分离工程联合公司研制的聚烯烃中空纤维膜的性能,应用和开发前景。 相似文献
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针对家用净水器的市场情况,介绍了中空纤维膜超滤技术的工作原理和特点;提出用串联活性炭(或RO)过滤单元的组合模式可弥补该技术存在的不足;依据消费者对该类产品在净化功能等方面的需求,提出了改进建议。 相似文献
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将热化学与浮选法结合,应用于油泥的处理.在处理工艺试验中重点考察了温度、搅拌时间、搅拌速度、充气量等因素对油泥清洗效果的影响.试验结果表明:在温度60℃、搅拌时间30 min、搅拌强度2 250 r/min、充气量0.2 L/min时,采用热化学浮选法对油泥的处理效果达到最佳,油泥中的残油量仅为2.8%. 相似文献
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针对中空纤维膜应用于水力压裂返排液处理时存在膜污染严重、通量衰减快、影响处理效率等问题,研究了PVDF(聚偏氟乙烯)固含量、凝固浴温度等因素对PVDF膜性能的影响,通过非溶剂致相分离法制备PVDF中空纤维膜,并采用表面接枝技术,对PVDF中空纤维膜进行了表面亲水化改性。压裂返排液吸附实验结果表明,表面接枝降低了PVDF的接触角,提高了膜的亲水性。将亲水性中空纤维膜用于页岩气水力压裂返排液的过滤处理,应用结果表明其对压裂返排液中的总铁、SS、浊度、细菌去除率达到90%以上,长时间运行后的通量保持率高,有较好的抗膜污染性。 相似文献
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膜生物反应器在有机废水处理中的研究新进展 总被引:1,自引:1,他引:1
介绍了我国近年来利用膜生物反应器处理有机废水的研究成果,并对膜生物反应器用于有机废水生物处理的前景及存在的问题进行评述。 相似文献
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HSMBR系统表现了对于COD高且稳定的去除效果。对于TN、TP,由于不排泥,污泥浓度的升高,并且填料内部的生物膜不断形成,以及在填料内部的污泥受曝气的扰动小,而变的较为密实,反应器内形成好氧、缺氧两种微环境并存,有利于系统对于TN、TP去除率的提高。 相似文献
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一体式膜生物反应器(SMBR)处理抗生素废水研究 总被引:9,自引:1,他引:9
采用一体式膜生物反应器处理抗生素废水,用配水在水温30℃,体积负荷分别为0.5COD/m3*d,1.0COD/m3*d,1.5kgCOD/m3*d,出水COD、NH3-N均小于21.7mg/L、14.1mg/L,原水实验中在水温30℃时,体积负荷为0.957kgCOD/m3*d时,出水平均值分别为26.53mg/L,2.84mg/L、有较好的处理效果. 相似文献
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Valencia R den Hamer D Komboi J Lubberding HJ Gijzen HJ 《Journal of environmental management》2009,90(2):940-945
Co-disposal of septic tank sludge had a positive effect on the municipal solid waste (MSW) stabilisation process in Bioreactor Landfill simulators. Co-disposal experiments were carried out using the Bioreactor Landfill approach aiming to solve the environmental problems caused by indiscriminate and inadequate disposal of MSW and especially of septic tank sludge. The simulator receiving septic tank sludge exhibited a 200 days shorter lag-phase as compared to the 350 days required by the control simulator to start the exponential biogas production. Additionally, the simulator with septic sludge apparently retained more moisture (>60% w/w), which enhanced the overall conversion of organic matter hence increasing the biogas production (0.60 m3 biogas kg(-1)VS(converted)) and removal efficiency of 60% for VS from the simulator. Alkaline pH values (pH>8.5) did not inhibit the biogas production; moreover it contributed to reduce partially the negative effects of NH(4)(+) (>2 g L(-1)) due to NH(3) volatilisation thus reducing the nitrogen content of the residues. Associated risks and hazards with septage disposal were practically eliminated as total coliform and faecal coliform contents were reduced by 99% and 100%, respectively at the end of the experiment. These results indicate that co-disposal has two direct benefits, including the safe and environmentally sound disposal of septic tank sludge and an improvement of the overall performance of the Bioreactor Landfill by increasing moisture retention and supplying a more acclimatised bacterial population. 相似文献
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预膜过滤技术在采油污水处理中的应用 总被引:1,自引:0,他引:1
详细介绍了新开发的FDF300型过滤工艺,并通过试验验证了自行研制的新型GM助剂在FDF型过滤器中应用的工艺条件,考察了助剂用量、型号、预膜时间以及空气反吹脱渣时间、反吹压力等因素对过滤效果的影响。结果表明,选用150gGM3助剂,预膜时间约20 min,空气反吹脱渣时间5 min,反吹压力0.35 MPa等工艺条件,可以获得理想的过滤效果,解决了长期困扰油田采油污水含油量和机械杂质不达标的难题。 相似文献
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Liquid water management is still a critical issue in the improvement of proton exchange membrane fuel cell (PEMFC) performance. In this work, for the first time, the liquid water behavior and transport inside the cathode of a PEMFC with a stirred tank reactor (STR) design, rather than the conventional PEMFC flow channel design, are numerically studied. The dynamic contact angle (DCA) is applied to multiple wall boundaries in the numerical model through a user-defined-function (UDF) code, i.e., STR-DCA model. Another numerical model with the static contact angle (SCA) and same operating conditions, i.e., STR-SCA model, is also developed for comparison. The volume of fluid (VOF) method is employed in the simulation to track the gas-liquid interface. The results show that the liquid water distribution and transport are significantly different between these two models, indicating the remarkable effects of DCA on the simulation results. It is also verified the capability of STR-PEMFC to reduce the liquid water flooding, showing the potential of this channel-less type fuel cell in the further development. 相似文献
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分析了我国干法腈纶废水的来源、特点,介绍了干法腈纶废水处理技术的研究进展,并就其未来的研究方向提出了建议. 相似文献
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The membrane separation process for CO2 capture can be interfered by the gaseous components and the fine particles in flue gas, especially in desulfurized flue gas. In this work, the pint-sized Polyimide(PI) hollow fiber membrane contactors were self-packed to investigate the membrane CO2 separation from flue gas containing fine particles and gaseous contaminants (SO2,SO3,H2O). First, the effects of SO2, SO3, water vapor, and gypsum particles on the CO2 capture were studied independently and synergistically. The results showed that the effect of SO2 on the membrane separation properties is indistinctive; however, the membrane performance was damaged seriously with the addition of SO3. The high humidity promoted the CO2 separation initially before inhibiting the PI membrane performance. Moreover, the decrease of the CO2/N2 selectivity and the permeation rate were accelerated with the coexistence of SO2. The membrane performance showed an obvious deterioration in the presence of gypsum particles, with a 21% decrease in the CO2/N2 selectivity and 51% decrease in the permeation rate. Furthermore, the gypsum particles exerted dramatic damage. Under the WFGD conditions, the combined effects of SO2, water vapor, and the gypsum particles influenced the stability of the membrane significantly. This tendency is mainly attributed to the deposition of fine particles and aerosol on the membrane surface, which occupied the effective area and enhanced the mass transfer resistance. This study of impurities’ influence could play an important role in further industrial application of membrane CO2 capture. 相似文献
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Optimisation of rainwater tank design from large roofs: A case study in Melbourne, Australia 总被引:4,自引:0,他引:4
Monzur Alam Imteaz Abdallah ShanablehAtaur Rahman Amimul Ahsan 《Resources, Conservation and Recycling》2011,55(11):1022-1029
Rainwater tanks for larger roof areas need optimisation of tank size, which is often not carried out before installation of these tanks. This paper presents a case study of rainwater tank evaluation and design for large roof areas, located in Melbourne, Australia, based on observed daily rainfall data representing three different climatic regimes (i.e. dry average, and wet years). With the aim of developing a comprehensive Decision Support Tool for the performance analysis and design of rainwater tanks, a simple spreadsheet based daily water balance model is developed using daily rainfall data, contributing roof area, rainfall loss factor, available storage volume, tank overflow and irrigation water demand. In this case study, two (185 m3 and 110 m3) underground rainwater tanks are considered. Using the developed model, effectiveness of each tank under different climatic scenarios are assessed. The analysis shows that both the tanks are quite effective in wet and average years, however less effective in dry years. A payback period analysis of the tanks is preformed which reveals that the total construction cost of the tanks can be recovered within 15-21 years time depending on tank size, climatic conditions and future water price increase rates. For the tanks, a relationship between water price increase rates and payback periods is developed. The study highlights the need for detailed optimisation and financial analysis for large rainwater tanks to maximise the benefits. 相似文献