共查询到17条相似文献,搜索用时 234 毫秒
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滦河源水的深度处理技术研究 总被引:1,自引:2,他引:1
针对滦河源水水质,在常规处理的基础上分别进行了生物活性炭和臭氧生物活性炭两种深度处理工艺的对比试验。结果表明,普通生物活性炭和臭氧生物活性炭两种深度处理工艺均能有效改善常规工艺的出水水质,经过色质联机检验,水中各类微量有机物的种类和含量均有了显著降低。相比较而言,臭氧生物活性炭对有机物具有更高的去除率,对氨氮的平均去除率为58.3%,对CODMn的平均去除率为58%,对UV254的平均去除率为62.3%,对TOC的平均去除率为51.6%,对分子质量为1~5ku有机物的去除率〉60%,对分子质量〈1ku和分子质量〉5ku的有机物去除率〉30%。 相似文献
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两级A/O-Fenton-BAF工艺处理垃圾渗滤液 总被引:1,自引:1,他引:0
针对垃圾渗滤液的水质特征,采用厌氧折流板反应器/一级好氧/接触厌氧/二级好氧/Fenton氧化/曝气生物滤池工艺处理垃圾渗滤液.原水COD约为1 300 mg/L,氨氮约为300mg/L,运行结果表明,该工艺运行稳定,系统对COD的去除率达到93%,对氨氮的去除率达到98%,出水COD<100 mg/L、氨氮<25 mg/L、色度<40倍、悬浮物<30 mg/L,达到<生活垃圾填埋场污染控制标准>(GB 16889-2008)中表2的排放标准. 相似文献
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混凝—微滤工艺去除膜反洗水中有机物的试验研究 总被引:1,自引:0,他引:1
采用混凝-微滤工艺处理混凝-超滤中试装置的膜反洗水(MBW),将试验原水和出水经不同截留分子质量的超滤膜过滤,分析了不同分子质量区间的有机物分布.此外通过改变混凝剂(FeCl3)投量、采取投加粉末活性炭(PAC)等措施,考察了MBW中有机物的去除率与FeCl3投量、处理工艺(混凝-微滤、混凝-PAc吸附-微滤工艺)的关系.研究结果表明,MBW中DOC主要分布在分子质量>30 ku和分子质量<1 ku的区间内,THMFP、UV254主要集中在分子质量<1ku的区间内;混凝过程能有效去除分子质量>30 ku的大分子有机物,PAC能有效去除小分子有机物;随混凝剂投量的增加,对DOC、UV254、THMFP的去除率均有不同程度的提高. 相似文献
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生活垃圾渗滤液是一种含有多种污染物的高浓度有机废水.其中难降解有机物和重金属离子在水中存在时间长、范围广、危害大.不能直接排放,因而渗滤液处理显得尤为重要。由于渗滤水质水量受各种因素的影响而变得非常复杂.目前尚无十分完善的处理工艺,就现有的处理方法来看,主要是厌氧、好氧生物处理、化学氧化混凝吸附等.如何把现有的处理工艺有 相似文献
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《中国给水排水》2016,(19)
通过对南郊水厂一期、二期原水中有机物分子质量分布的测定,得出一期原水中DOC以分子质量3 ku的有机物为主,其T1/C值高,其中的有机物更容易被微生物降解去除,并且原水水质受藻类新陈代谢的影响大,水质较差,处理负荷较大;二期原水DOC以分子质量3 ku和30 ku~0.45μm的有机物为主,大分子有机物含量较一期原水多,且所含有机物疏水性强,更容易通过混凝沉淀工艺去除,同时二期原水有机物含量较低,其所表现出来的生物可降解能力较差,该水质条件下的生物稳定性更强,水质优于一期,处理负荷较小。以上分析结果可以作为水厂一期、二期工艺运行参数及粉炭投量调整的依据,即一期工艺粉末活性炭投加采用其经济投量的上限,二期工艺投加的粉炭量可以采用下限;传统的混凝沉淀工艺对一期、二期原水的有机物去除能力不高,因此需要辅以其他处理工艺如粉末活性炭吸附。 相似文献
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从分子质量的变化分析臭氧活性炭工艺 总被引:7,自引:3,他引:7
为了解臭氧活性炭工艺的机理并优化运行条件,采用臭氧活性炭处理黄浦江原水,分析了原水及经不同工艺单元处理后溶解性有机物 (DOM)分子质量 (MW)的变化。结果表明:黄浦江原水中的DOM主要为小分子有机物;臭氧对大分子有机物的氧化分解作用明显强于对小分子有机物的氧化作用;MW<1ku的有机物经臭氧氧化后则表现出不同程度的增加;混凝、沉淀、过滤对MW>3ku的大分子有机物去除效果较好,而对MW<3ku的小分子有机物去除效果较差;生物活性炭单元能有效去除MW为 3~1ku和MW<1ku的小分子有机物;臭氧氧化与活性炭吸附在去除不同MW有机物的过程中有很好的互补性,从而使该工艺能有效去除原水中的DOM。 相似文献
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颗粒活性炭吸附去除黄浦江原水中有机物的研究 总被引:2,自引:0,他引:2
采用超滤膜法分析了黄浦江原水和水厂常规工艺处理出水中有机物的分子质量(MW)分布以及颗粒活性炭(GAC)在不同吸附阶段吸附去除不同分子质量有机物的性能.试验结果表明,黄浦江原水及常规工艺出水中的溶解性有机物(DOC)以小分子为主,并主要集中在MW为10~30 ku和MW<1 ku的区间;活性炭吸附出水中的溶解性有机物仍然主要集中在小分子区间;吸附初期的活性炭对有机物的去除能力较强,其中对CODMn的去除率>83%,对UV254的去除率>90%;随着通水倍数的增大则活性炭的吸附能力逐渐下降,当通水倍数达到6 590.9时,对CODMn和UV254的去除率都只有25%左右;活性炭吸附的各个阶段对小分子有机物的去除率均较高,而对大分子有机物的去除率则较低,从吸附初期到吸附后期,对小分子有机物的去除率高出对大分子有机物的去除率,其百分比从10%增大到30%. 相似文献
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Landfill leachate needs sufficient treatment before safe disposal. Bioreactor landfill technology could effectively degrade the organic matters in recirculated leachate, hence leaving a leachate stream of low biodegradability. This study characterized the dissolved organic matter (DOM) in the leachate from simulated bioreactor landfill columns with or without presence of trace oxygen. The removal efficiencies of this DOM using coagulation-sedimentation or electrolysis processes were demonstrated. Recirculated leachates were sampled from the simulated landfill columns applying conventional mode, intermittent-aeration mode, and natural aeration mode, whose DOM was fractionated into humic acids (HA), fulvic acids (FA) and hydrophilic fractions (HyI) by the XAD-8 resin combined with the cation exchange resin method. The recirculated leachate had low BOD/COD ratio, high humic substances contents, and high aromatic content. Their HA fraction comprised mainly large molecules (>10 k Da), while the FA and HyI were composed of smaller molecules (<50 k and <4 k Da, respectively). With the presence of oxygen, the TOC contents and the contents of HA, FA and HyI in leachate reduced, with FA and HyI fractions of molecular weight (MW) lower than 4 k Da more readily degraded. The organic matters left in leachates from intermittent-aeration mode and natural aeration mode were of low biodegradability. It was tested in the following sections the effects of coagulation-sedimentation process and of electrolysis process on the removal of residual DOM in recirculated leachate. Coagulation-sedimentation tests revealed that poly ferric sulphate (PFS) could remove more COD (58.1%) from leachate than polyaluminum chloride (PACl) (22.9%), particularly on the HA fraction with MW>10 k Da. Coagulation-sedimentation could not remove most of HyI in leachate. Furthermore, the corresponding BOD/COD ratio was not improved through coagulation. Electrolysis test could also effectively removed HA of MW>10 k Da. However, the biodegradability of treated effluent considerably was improved. The electrolysis could decompose high MW substances and increase biodegradability of recirculated leachate from bioreactor landfill. 相似文献
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采用超滤膜法对太湖源水中的蓝藻腐败产物进行了分子质量分级,研究了混凝、超滤、臭氧氧化及活性炭吸附等工艺对腐败产物的去除效果.结果表明,以CODMn表征的有机物主要分布在分子质量>40 ku和<10 ku的区间,致嗅物质主要集中在10-40 ku的区间,以UV254表征的有机物主要分布在分子质量<40 ku的区间.混凝、超滤特别适于去除分子质量较大的有机物,对致嗅有机物的去除效果不明显;臭氧氧化能显著去除致嗅有机物,同时还将大分子有机物氧化为小分子有机物;活性炭对小分子有机物的吸附效果明显,能够有效去除分子质量<10 ku的有机物.将这四种工艺进行组合能充分发挥各自的作用,保障饮用水的安全性. 相似文献
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Integrated ozone and biotreatment of pulp mill effluent and changes in biodegradability and molecular weight distribution of organic compounds 总被引:3,自引:0,他引:3
The overall effectiveness of integrating ozonation with biological treatment on the biodegradability enhancement and recalcitrant organic matter (ROM) removal from pulp mill alkaline bleach plant effluent was investigated. Ozonation was performed in a semi-batch bubble column reactor at pH of 11 and 4.5. Batch biological treatment was conducted in shake flasks. Samples obtained during the treatments were monitored for BOD5, COD, TOC, and molecular weight distribution. At an ozone dosage of 0.7-0.8 mg O3/mL wastewater, integrated treatment showed about 30% higher TOC mineralization compared to individual ozonation or biotreatment. Ozone treatment enhanced the biodegradability of the effluent (monitored as 21% COD reduction and 13% BOD5 enhancement), allowing for a higher removal of pollutants. The conversion of high molecular weight (HMW) to low molecular weight (LMW) compounds was an important factor in the overall biodegradability enhancement of the alkaline effluent. The overall biodegradability of the LMW compounds did not change over the course of ozonation, but it increased from 5% to 50% (measured as COD removal) for the HMW portion. Ozonation at pH of 11 was more effective than that at pH of 4.5 in terms of generating more biodegradable compounds. 相似文献
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针对微污染原水中存在的有机物和氨氮等污染物,采用生物粉末活性炭/超滤(BPAC/UF)组合工艺进行处理。结果表明,当进水氨氮浓度较低时,硝化细菌活性较差,无法充分发挥生物降解作用,氨氮去除率较低,同时有机物去除率也较低;当进水氨氮浓度在0. 6 mg/L左右时,可以形成稳定的生物活性炭,组合工艺对氨氮的去除率较高,且对有机物的去除率较为稳定。进水中主要以分子质量<5 ku的有机物为主,组合工艺对这部分有机物的去除率也最高。组合工艺对疏水性物质的去除,主要依靠生物粉末活性炭的吸附降解和膜面滤饼层的截留作用。NaClO强化反冲洗可以很好地降低跨膜压差的增长速度,当NaClO浓度为400 mg/L、反冲洗时间为10min时可达到最佳清洗效果。 相似文献