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污水深度处理中过滤技术的研究 总被引:4,自引:1,他引:4
阐述了粗石英砂气水同时冲洗滤池,在污水深度处理中的适用性。通过絮凝沉淀过滤、直接过滤和微絮凝过滤三种处理工艺的试验,表明该滤池较常规滤池显示更好的性能。针对污水过滤中的问题广重点对滤料、反冲洗、滤料支持系统进行了讨论。 相似文献
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针对水厂滤池出水水质不达标、反冲洗耗水量大、过滤周期短以及反冲洗水排放不彻底等问题,选择反向过滤气水反冲洗滤池来改善过滤效果,通过对工艺进行优化改造,使滤池出水浊度≤1 NTU,实现了初滤水的自动排放;反冲洗周期>36 h;反冲洗水耗控制在产水量的2.0%以内,并且提高了自动化程度. 相似文献
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虹吸滤池节水装置研制对砂层进行反冲洗排出污质,可恢复砂层清洁以再过滤。但是在反冲洗时(6~8min),滤池应该海正在水,否则这部分水白白浪费了。虹吸滤池即在在这个问题,现从该滤池的进个装上进行分析(见图1)。滤池投入运行后,配水干渠1的水从虹吸辅助管... 相似文献
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以甲醇为碳源,进行了生物滤池去除二级处理出水中氮、磷的试验研究。结果表明,随着甲醇投量的增大则生物滤池出水中的总氮浓度降低,但对总磷的去除率呈下降趋势。当甲醇投量为10mg/L时,生物滤池出水中的总氮〈6.60mg/L,对总氮的去除率〉37%,对总磷的去除率〉43%;当甲醇投量为20mg/L时,生物滤池出水中的总氮〈1.20mg/L,对总氮的去除率〉88%,对总磷的去除率〉9%;当甲醇投量为30mg/L时,生物滤池出水中的总氮〈1.20mg/L,对总氮的去除率〉88%,对总磷的去除率〉6%。当滤速在3~8.5m/h间变化时,陶粒滤池的脱氮除磷效果基本不受影响;砂滤池的脱氮除磷效果稍优于陶粒滤池。 相似文献
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针对生物滤池处理高氨氮水源水过程中硝酸盐、亚硝酸盐积累的问题,提出一种能够同时去除"三氮"污染物的强化过滤技术——生物催化滤池。该技术将传统生物过滤与催化还原反应相结合,在生物过滤去除氨氮的同时,钯/锡双金属催化滤料可将硝酸盐氮和亚硝酸盐氮还原为氮气。在滤池的滤速为10 m/h时,对氨氮和TOC的去除率分别为82. 12%和71. 94%,主要依靠生物滤层内微生物的降解作用来去除;对硝酸盐氮和亚硝酸盐氮的去除率分别为58. 22%和78. 65%,主要通过催化还原滤料的化学反应来去除;滤池出水浊度<3 NTU。生物催化滤池在生化反应和催化还原的共同作用下能够有效缓冲低温、高氨氮、高硝酸盐氮、高亚硝酸盐氮以及高TOC等特殊条件下短时间连续冲击,具有较强的抗冲击负荷能力,保证产水水质稳定。生物催化滤池可以作为微污染水源水的预处理工艺,保障后续工艺的稳定运行,具有良好的应用前景。 相似文献
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水解酸化/悬浮滤料BAF一体化装置处理生活污水 总被引:1,自引:0,他引:1
水解酸化/悬浮滤料曝气生物滤池,是将水解酸化与曝气生物滤池结合为一体的新型污水处理工艺。在滤速为37.7 m/d、水力停留时间为3.98 h、进水pH平均值为7.69、平均水温为18.1℃的条件下,考察了该工艺对城镇污水的处理效果。试验结果表明,当BOD5容积负荷为2.14 kg/(m3.d)、NH3-N容积负荷为0.38 kg/(m3.d)、反冲洗周期为3 d、反冲洗强度为39.3m3/(m2.h)时,该工艺具有良好的除碳脱氮性能,对COD、BOD5、NH3-N、SS、TN、TP的平均去除率分别可达90.1%、96.0%、90.1%、92.8%、38.4%、75.5%。此外,该工艺还具有结构简单、占地面积小、运行稳定、出水水质好、管理简便的特点,适合于居住小区等小水量的生活污水处理工程。 相似文献
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Pilot-scale trials at a domestic wastewater treatment works compared the performance of three grades of recycled glass (coarse, medium and fine) when used as tertiary filter media for total suspended solids removal (TSS). Fine glass produced the best effluent quality but blinded rapidly and coarse glass could process three times the flow but with a reduction in final effluent quality. The medium glass offered a compromise with similar flow characteristics to the coarse glass, yet still achieve good solids removal, albeit less than the fine glass. Full-scale studies compared the performance of medium glass with the sand medium that is typically used in this application. There was little difference between them in terms of TSS removal, and they both removed around 75% of TSS from the influent, provided that the solids concentration did not exceed 70mg/l. However, the glass media had superior flow characteristics and was able to treat an additional 8-10% of the influent following the backwash cycle. Over the study period, the influent to the filters had an average TSS concentration of 38mg/l and produced an effluent with an average of 15mg TSS/l. In order to design for an average TSS concentration of 20mg/l, the maximum solids loading on the medium should not exceed 0.25kg solids/m(3)/h. Selecting recycled glass as a tertiary filter medium will give a 10% reduction in the amount of media required, compared to sand. It also carries with it the benefits of using a recycled material, and although these are more difficult to quantify they include: reduced CO(2) emissions and use of a more sustainable product that promotes favourable publicity and positive environmental reporting. 相似文献
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A novel high-rate anaerobic reactor, called "Buoyant Filter Bioreactor" (BFBR), has been developed for treating lipid-rich complex wastewater. The BFBR is able to decouple the biomass and insoluble COD retention time from the hydraulic retention time by means of a granular filter bed made of buoyant polystyrene beads. Filter clogging is prevented by an automatic backwash driven by biogas release, which fluidizes the granular filter bed in a downward direction. During filter backwash, the solids captured in the filter are reintroduced into the reaction zone of the reactor. The reaction zone is provided with a mixing system, which is independent of the hydraulic retention time. The performance of a laboratory-scale BFBR was studied for the treatment of dairy effluent, chosen as a model complex wastewater. The dairy effluent was not pre-treated for fat removal. The BFBR was operated over 400 d and showed greater than 85% COD removal at 10 kg COD/(m3/d). The COD conversion to methane in the BFBR was essentially complete. The BFBR performance improved with age, and with feed containing 3200 mg COD/l, the treated effluent had 120 mg COD/l and no turbidity. The hold-up of degradable biosolids, including scum, inside the BFBR was estimated using starvation tests. When load is increased, scum accumulates inside the BFBR and then decays after undergoing change from hydrophobic to hydrophilic. This is explained as the accumulation of fat solids, its conversion to insoluble long chain fatty acids and its further solubilization and degradation. 相似文献
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SMSBR去除焦化废水中有机物及氮的特性 总被引:12,自引:3,他引:12
选用一体化膜—序批式生物反应器 (SubmergedMembraneSequencingBatchReac tor ,简称SMSBR)处理焦化废水 ,考察了能否通过膜分离的强化作用提高生物处理系统对焦化废水的处理效果 ,使出水COD达到新的排放标准 ( <10 0mg/L) ,并提高脱氮效率。研究结果表明 :在HRT为 32 .7h ,平均COD容积负荷为 0 .4 5kg/ (m3·d)的条件下 ,出水COD可以稳定在 10 0mg/L以下 (平均为 86.4mg/L) ;要使COD达到新的排放标准 ,进水COD容积负荷应低于 0 .67kg/ (m3·d) (该负荷下出水COD在 10 0mg/L上下波动 ,平均为 10 6.3mg/L) ;好氧段存在明显的反硝化现象 ,使COD的去除得到强化 ;在保证系统温度、碱度、溶解氧和不受进水COD负荷冲击的情况下 ,出水NH3-N可低于 1mg/L ,但泥龄太长所产生的微生物代谢产物抑制了硝化反应过程中的硝酸盐细菌 ,使好氧段出水NO2 -N/NOx-N平均为 91.1% ,因此系统获得极其稳定高效的短程硝化作用 ,有利于进一步脱氮 ;按“缺氧 1—好氧—缺氧 2”方式运行时 ,若“缺氧 2”的HRT>8.4 4h ,可实现 81.34 %的反硝化率 (外加碳源 :COD/N为 2 .1g/g) ,平均TN去除率为 87.2 % ,最高达 90 .2 %。 相似文献
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重金属铅污染应急处理技术中试研究 总被引:1,自引:0,他引:1
研究了投加碱液预处理+常规净水工艺对水中铅的去除效果及影响因素。结果表明,该应急处理技术对水中的铅具有较好的去除效果,出水铅含量可降至《生活饮用水卫生标准》限值(10μg/L)以内;聚铝比液铝具有更好的除铅效果,当聚铝投加量为42~48 mg/L,原水pH调节至7.8~8.4,进水铅质量浓度为2.0 mg/L时,出水铅含量最低可降至0.56μg/L;pH值对除铅效果有一定影响,pH值越高出水铅含量越低;清洁滤池时,应采用碱液梯度递减的方式,以保证出水水质。 相似文献
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水力停留时间对BAF除污性能的影响 总被引:2,自引:0,他引:2
研究了水力停留时间(HRT)对曝气生物滤池(BAF)除污效果的影响。结果表明:HRT对BAF处理效果的影响较大,当HRT为0.63 h时,出水浊度、COD、氨氮和总氮浓度均较高,BAF的除污效果较差;当HRT为0.83 h时,出水COD浓度可降至50 mg/L以下,去除率可达到85.87%;当HRT为1.0 h时,BAF对浊度、氨氮和总氮均有较好的去除效果,去除率分别为95.98%7、7.08%4、0.09%,出水浊度<4 NTU、氨氮<8 mg/L、总氮<35 mg/L。 相似文献