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101.
垃圾渗滤液浓度高、成分复杂,难以处理,常规生化处理方法存在缺点,碟管式反渗透(DTRO)是针对垃圾渗滤液的水质特点而设计的,出水水质好,受进水水质影响很小,在国外的垃圾渗滤液处理中应用广泛。在分析DTRO工艺特点的基础上,探讨了两级DTRO工艺流程、特点、机理和浓缩液的处理方法,并论述了DTRO运行参数对膜片性能的影响。掌握系统运行和膜清洗时各项参数对膜性能的影响趋势,优化预处理工艺对降低处理成本,指导同类工艺的优化操作具有一定的参考价值。 相似文献
102.
染料厂、农药厂、制药厂等工业都会产生含有高浓度苯胺的废水,处理苯胺废水的方法较多,本文通过实验的方式着重研究了膜萃取法处理高浓度苯胺废水,并通过分析实验结果得出了相应结论。 相似文献
103.
104.
老港填埋场渗滤液性质随工艺变化研究 总被引:1,自引:0,他引:1
经老港填埋场渗滤液处理系统的各处理单元处理后的流出液,用不同孔径的系列膜进行了梯度分离。分离前后的渗滤液进行了TOC、TP、TN、氨氮和可溶性P等参数的测定,并建立了各参数与不同孔径膜的关系。结果表明,此工艺对老港填埋场渗滤液的处理具有一定的功效;随着处理工艺的进行,渗滤液的组成发生了较大的改变,其中细胶体部分的百分含量增加,而可溶性部分降低;渗滤液的绝大部分污染物质集中于可溶性部分,而渗滤液中的P主要与大分子的悬浮物和粗胶体结合。 相似文献
105.
Kayleigh Brown Avik J. Ghoshdastidar Jillian Hanmore James Frazee Anthony Z. Tong 《Waste management (New York, N.Y.)》2013,33(11):2188-2194
Compost leachate forms during the composting process of organic material. It is rich in oxidizable organics, ammonia and metals, which pose a risk to the environment if released without proper treatment. An innovative method based on the membrane bioreactor (MBR) technology was developed to treat compost leachate over 39 days. Water quality parameters, such as pH, dissolved oxygen, ammonia, nitrate, nitrite and chemical oxygen demand (COD) were measured daily. Concentrations of caffeine and metals were measured over the course of the experiment using gas chromatography – mass spectrometry (GC/MS) and inductively coupled plasma – mass spectrometry (ICP–MS) respectively. A decrease of more than 99% was achieved for a COD of 116 g/L in the initial leachate. Ammonia was decreased from 2720 mg/L to 0.046 mg/L, while the nitrate concentration in the effluent rose to 710 mg/L. The bacteria in the MBR system adjusted to the presence of the leachate, and increased 4 orders of magnitude. Heavy metals were removed by at least 82.7% except copper. These successful results demonstrated the membrane bioreactor technology is feasible, efficient method for the treatment of compost leachate. 相似文献
106.
107.
Zhongguo Zhang Dan Liu Yu Qian Yue Wu Peiran He Shuang Liang Xiaozheng Fu Jiding Li Changqing Ye 《环境科学学报(英文版)》2017,29(6):153-163
A submerged internal circulating membrane coagulation reactor(MCR) was used to treat surface water to produce drinking water. Polyaluminum chloride(PACl) was used as coagulant,and a hydrophilic polyvinylidene fluoride(PVDF) submerged hollow fiber microfiltration membrane was employed. The influences of trans-membrane pressure(TMP), zeta potential(ZP) of the suspended particles in raw water, and KMnO_4 dosing on water flux and the removal of turbidity and organic matter were systematically investigated. Continuous bench-scale experiments showed that the permeate quality of the MCR satisfied the requirement for a centralized water supply, according to the Standards for Drinking Water Quality of China(GB 5749-2006), as evaluated by turbidity(1 NTU) and total organic carbon(TOC)(5 mg/L)measurements. Besides water flux, the removal of turbidity, TOC and dissolved organic carbon(DOC) in the raw water also increased with increasing TMP in the range of 0.01–0.05 MPa. High ZP induced by PACl, such as 5–9 mV, led to an increase in the number of fine and total particles in the MCR, and consequently caused serious membrane fouling and high permeate turbidity.However, the removal of TOC and DOC increased with increasing ZP. A slightly positive ZP, such as 1–2 mV, corresponding to charge neutralization coagulation, was favorable for membrane fouling control. Moreover, dosing with KMnO_4 could further improve the removal of turbidity and DOC, thereby mitigating membrane fouling. The results are helpful for the application of the MCR in producing drinking water and also beneficial to the research and application of other coagulation and membrane separation hybrid processes. 相似文献
108.
随着MBR反应器在国内污水处理行业中的不断应用,其重要性进一步得到了业界的认可。但是,如何消减运行过程中的膜污染问题,成为制约MBR推广和应用的重要因素。文章通过实验,将旋转接头应用在MBR反应器的改良中,重点研究通过旋转接头实现膜组件的旋转运行模式对膜污染的抑制效果。 相似文献
109.
膜分离技术处理高浓度味精废水试验研究 总被引:3,自引:0,他引:3
利用膜分离技术,将高浓度味精废水分离为数量不等的滤过水和浓缩水,浓缩水可再次开发利用,滤过水可直接进行生化处理,使外排废水达到国家规定标准。 相似文献
110.
Volatile organic compounds(VOCs) are a crucial kind of pollutants in the environment due to their obvious features of severe toxicity, high volatility, and poor degradability. It is particularly urgent to control the emission of VOCs due to the persistent increase of concentration and the stringent regulations. In China, clear directions and requirements for reduction of VOCs have been given in the “national plan on environmental improvement for the 13th Five-Year Plan period”. Therefore, the de... 相似文献