共查询到19条相似文献,搜索用时 187 毫秒
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对绿辉石作为新型滤料进行可行性探究,通过过滤试验,研究其除浊性能以及对有机物的去除能力。结果表明:在滤速为8 m/h、进水浊度为15 NTU、UV_(254)浓度为10 mg/L的条件下,过滤0~18 h,绿辉石滤料过滤出水浊度一直低于石英砂滤料;过滤7~10 h,绿辉石对出水浊度有更高的去除效率,出水浊度可达0.44 NTU。绿辉石对腐植酸的去除率为23.46%,低于石英砂25.27%的去除率。绿辉石每个滤层对有机物的去除能力更均匀。由水头损失对比分析可知,绿辉石水头损失增加率低于石英砂,绿辉石有更高的周期产水量,二者过滤能力受反冲洗影响较小。研究发现,绿辉石作为新型滤料在微污染原水处理中有一定的发展空间。 相似文献
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《净水技术》2017,(12)
强化过滤在饮用水常规处理技术中发挥着重要作用。通过对比国内外煤一砂双层滤料滤池设计参数,设计不同配置滤层的试验滤柱进行优化无烟煤一石英砂双层滤料滤池运行参数研究,可为双层滤料滤池设计运行提供一定的技术支持。试验结果表明,上层无烟煤层厚为600 mm、有效粒径为1.0 mm、K_(80)=1.4,下层石英砂层厚为300 mm、有效粒径为0.5 mm、K_(80)≤2.0的配置下滤柱具有较好的过滤性能。当滤速为12 m/h时,滤池出水浊度控制在0.1 NTU以下,2~5μm颗粒数在3 000/mL以下,过滤周期长达26 h,且可以防止浊度和颗粒数穿透滤池。 相似文献
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采用石英砂和新型纤维丝滤料对比研究微絮凝过滤工艺处理城市景观河水的净化效能.研究表明,石英砂滤床在投药量10mg·L-1,滤速10m·h-1时,过滤周期为12h左右;在投药量10mg·L-1,滤速15 m·h-1时,过滤周期仅为4h.而新型纤维丝滤料则具有更为优越的过滤性能,在投药量10mg·L-1,滤速30m·h-1时,新型纤维丝过滤柱的过滤周期达到了12h.在滤速为30m·h-1时,投药量在20mg·L-1以上时,过滤周期可以达到20h以上.10min的气水联合反冲洗能够将过滤后的新型纤维丝清洗干净.新型纤维丝滤料的产水率高,一个过滤周期内反冲洗水量:过滤水量约为1:100. 相似文献
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《化学与生物工程》2017,(3)
研发了一种新型高效纤维束过滤器,以过滤出水浊度、过滤周期和过滤能力指数为综合评价指标,考察了滤床密度、滤速和聚合氯化铝(PAC)投加量对过滤出水浊度的影响,并探究了在最佳运行参数条件下不同滤层深度出水浊度随时间的变化。结果表明,新型纤维过滤器的最佳运行参数为:滤床密度62.86kg·m-3,滤速30.0m·h-1,PAC投加量40mg·L-1,在该运行模式下平均过滤出水浊度低于0.01NTU,过滤周期260min,周期产水量5 200L。浊度的去除主要通过200~500mm滤层,该段滤层浊度下降最快,浊度去除率85%左右,而600~700mm段滤层经压缩后孔隙尺寸极小,起到了良好的浊度保护作用,最终过滤出水浊度均保持在了0.1NTU以下。 相似文献
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纤维束直接过滤微絮凝原水的试验研究 总被引:1,自引:0,他引:1
采用纤维束滤料对微絮凝的中浊度原水进行了直接过滤的试验研究。试验结果表明 ,在原水浊度为 2 0~ 4 0NTU ,PAC投加量为 18mg·L-1,滤速为 2 0~ 30m·h-1时 ,纤维束滤料直接过滤技术具有出水水质好、过滤水头损失小、截污量大、运行工况稳定的特点 相似文献
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采用SBR-过滤-吸附对氯丁橡胶生产废水进行处理,研究了不同进水浓度和曝气量对SBR出水的影响以及无烟煤.石英砂双层滤料的过滤效果和活性炭与人造沸石的吸附效果。结果表明,采用SBR-无烟煤-石英砂双层滤料过滤-活性炭吸附工艺处理氯丁橡胶生产废水,当进水COD为1020mg/L左右时,出水COD降至40mg/L以下,浊度降至0.75NTU,色度降至0,出水可回用于生产。 相似文献
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Vinay Kumar Tyagi 《Desalination》2009,249(2):571-576
The study was carried out to evaluate the feasibility of slow sand filtration as a promising post treatment method for the up-flow anaerobic sludge blanket (UASB) reactor effluent. Laboratory scale filter column of 10 cm diameter and 0.54 m sand media depth was used to study the process performance. It was found out that slow sand filtration with 0.43 mm effective sand size is the most effective at a filtration rate of 0.14 m/h. It is capable of removing 91.6% of turbidity, 89.1% of suspended solids (SS), 77% of chemical oxygen demand (COD) and 85% of bio-chemical oxygen demand (BOD), 99.95% of total and fecal coliforms (TC and FC) and 99.99% of fecal streptococci (FS). Slow sand filters efficiently reduce the mass of suspended material and extend the filter run for more time (7 days) at a hydraulic load of 0.14 m/h as compared to the hydraulic load of 0.19 m/h and 0.26 m/h. Therefore, due to excellent effluent quality, it can be said that slow sand filtration would be a promising technology for the post treatment of small-scale UASB reactor effluent in developing countries, where treated effluent can be reused for various recreational purposes i.e. gardening and irrigation, as well as for safe discharge. 相似文献
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Ultrafiltration (UF) of treated municipal wastewater has been used to produce high-quality reuse water for different applications. However, without pre-treatment, secondary treated wastewater effluent shows high fouling potential and reduces the performance of UF membrane filtration significantly. To remove foulants prior to UF, slow sand filtration (SSF) was investigated in the present work. Two pilot-scale slow sand filters were operated in tandem with UF. The performance of the UF plant was improved to a large extent by delivering slow sand filtrate compared to direct secondary effluent filtration. Removal of common organic fouling indicators (i.e., proteins, carbohydrates, and biopolymers) by SSF was significantly higher at 0.25 m/h versus 0.5 m/h filter loading rate. Results of a comparative analysis of SSF effluent characteristics and UF performance showed that the biopolymer content detected by size exclusion chromatography displayed a good correlation with the filterability of corresponding water sample by UF, while photo-metrically detected proteins and polysaccharides did not present any relationship with UF performance. 相似文献
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采用石英砂+微滤膜工艺对广州珠江原水进行了试验研究,运行参数为:石英砂滤速为8.0 m/h,微滤膜通量为28.6 L/m2h,结果表明:浊度的去除效果可达到99%以上,出水浊度在0.18~0.396 NTU之间;菌落总数的去除率受原水水质影响较大,总大肠菌群、耐热大肠菌群去除效果可达到100%;新微滤膜经过2次药洗,第38天后之后微滤膜的工作压力稳定在0.14 MPa左右。 相似文献