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铅锌矿山井下废水与选矿废水的联合处理 总被引:1,自引:0,他引:1
用聚合硫酸铁处理铅锌矿山井下废水中的铀、镭,利用除去铀、镭后的井下水中的锌作混凝剂,与碱性选矿废水相混合,产生氢氧化物沉淀,达到相互净化处理的目的。处理后的水质符合工业废水排放标准,并可回用于选矿。 相似文献
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采用硼混复合混凝剂(PSC)对制革废水进行处理,实验结果表明:当PSC用量为2-3g/L,pH为7.0左右,快搅1-2min,慢搅12-16min,静置25min后,COD去除率达80%;加入硫酸亚铁进一步处理,可使COD去除率达91%以上,浊度去除率99%以上。该方法具有混凝剂用量少、工艺简单、絮体沉降快、成本低廉、效率高等优点。 相似文献
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用生化净水工艺和传统净水工艺系统进行了受污染姚江水源水的对比试验研究,以探讨生化系统节约的混凝剂和液氯用量。结果表明,在相同的净水条件下,生化工艺系统处理污染原水比传统净水工艺节约混凝剂硫酸铝50%以上,节约液氯75%~80%,具有显著的经济、社会效益。 相似文献
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合成洗涤剂废水处理技术研究 总被引:12,自引:1,他引:12
探讨了生物接触氧化法处理含合成洗涤剂废水的技术,求得了最佳工艺条件。试验结果表明,生物接触氧化法能有效地处理含合成洗涤剂废水,在适当条件厂,CODcr去除率可达到80%~87%,CODcr容积负荷为35~5.gkg/m3·d。采用生物接触氧化-化学凝聚组合工艺,可使CODcr去除率提高到92%~96%。 相似文献
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针对石油工业含油废水的处理研制了一种CAX复合混凝剂。给出了CAX复合混凝剂的最佳反应条件,并与常用的铝盐,铁盐混凝剂处理效果进行比较。实验结果表明:在pH6-9,温度15-40℃,加药量0.5g/L,处理时间5-8min实验条件下,对含油废水中油和COD的去除率分别达到98%和80%以上,处理效果明显优于常用混凝剂。 相似文献
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以COD为288mg/L,色度为25000倍的配制酸性大红GR染料废水为对象,在研究常用混凝剂处理的基础上,配制了FeSO4——MgSO4-PAM复配混凝剂,并通过实验优化了操作条件。结果表明,复配混凝剂在较少的投加量下,即可同时达到较高的脱色率与COD去除率,处理效果明显优于单一混凝剂。当脱色率达90.9%,COD去除率达74.1%时,复配混凝剂总药剂费用仅为0.94元/吨废水,在经济性和处理效果上均是可行的。 相似文献
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为进一步提高饮用水水质,通过系统研究筛选混凝剂及优化混凝过程来达到高效去除污染物,以提供经济合理的水处理工艺途径.结果表明:新型药剂具有显著提高出水水质的性能,改善了沉淀后水体颗粒物的粒度分布特征,提高了过滤效率.同时表现出明显优越的去除有机物能力,传统工艺TOC去除大约在9%~11%,而新型药剂则可以达到17%~20%.应用树脂分离分级对不同有机物表征的结果也得到进一步证实.原水的TTHMFP为20.98μg/L,而原有工艺为11.01μg/L,使用新药剂后仅为6.40μg/L.使用新药可以明显节约成本,具有显著的经济效益,同时降低生产工艺的复杂性. 相似文献
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Siriprapha Jangkorn Sinchai Kuhakaew Suwapee Theantanoo Harit Klinla-or Tongchai Sriwiriyarat 《环境科学学报(英文版)》2011,23(4):587-594
A coagulation-flocculation process is typically employed to treat the industrial wastewater generated by the consumer products
industry manufacturing detergents, soaps, and others. The expenditure of chemicals including coagulants and chemicals for pH
adjustment is costly for treating this wastewater. The objective of this study was to evaluate the feasibility of reusing the aluminum
sulfate (alum) sludge as a coagulant or as a coagulation aid so that the fresh alum dosage can be minimized or the removal e ciency can
be enhanced. The experiments were conducted in a jar-test apparatus simulating the coagulation-flocculation process for simultaneous
removals of organic matters, anionic surfactants, suspended solids, and turbidity. At the optimum initial pH value of 10 and the fresh
alum concentration of 400 mg/L, the total suspended solids (TSS), total chemical oxygen demand (TCOD), total anionic surfactants,
and turbidity removal e ciencies were 71.5%, 76.4%, 95.4%, and 98.2%, respectively. The addition of alum sludge as a coagulant
alone without any fresh alum addition could significantly remove the turbidity, TCOD, and anionic surfactants. The TSS was left in the
supernatants after the settling period, but would subsequently be removed by adding the fresh alum. The TSS, TCOD, and turbidity
removal e ciencies were also enhanced when both the alum sludge and the fresh alum were employed. The TCOD removal e ciency
over 80% has been accomplished, which has never fulfilled by using the fresh alum alone. It is concluded that the alum sludge could
be reused for the treatment of industrial wastewater generated by the consumer products industry. 相似文献
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Ferreira Filho SIDNEY SECKLER Marchetto MARGARIDA Alves Laganaro ROSEMEIRE 《环境科学学报(英文版)》2013,25(8):1575-1582
Powered activated carbon (PAC) is widely used in water treatment plants to minimize odors in drinking water. This study investigated the removal of 2-methylisoborneol (MIB) by PAC adsorption, combined with coagulation using iron as a coagulant. The adsorption and coagulation process were studied through different case scenarios of jar tests. The analysis evaluated the effect of PAC dosing in the liquid phase immediately before or after the coagulant addition. Ferric sulphate was used as the coagulant with dosages from 10 to 30 mg/L, and PAC dosages varied from 10 to 40 mg/L. The highest MIB removal efficiency (about 70%) was achieved without the coagulant addition and with the highest PAC dosage (40 mg/L). Lower MIB removal efficiencies were observed in the presence of coagulant, showing a clear interference of the iron precipitate or coagulant in the adsorption process. The degree of interference of the coagulation process in the MIB removal was proportional to the ratio of ferric hydroxide mass to the PAC mass. For both cases of PAC dosing, upstream and downstream of the coagulant injection point, the MIB removal efficiency was similar. However, MIB removal efficiency was 15% lower when compared with experiments without the coagulant application. This interference in the MIB adsorption occurs potentially because the coagulant coats the surface of the carbon and interferes with the MIB coming in contact with the carbon’s surface and pores. This constraint requires an increase of the PAC dosage to provide the same efficiency observed without coagulation. 相似文献
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文章将微生物絮凝剂产生单菌M-3和M-2共同培养,获取生物絮凝剂,进行提取生物絮凝剂粗品,处理某纸箱厂废水。对生物絮凝剂投加量、Ca2+离子浓度、pH值的影响条件进行较系统的研究,绘制出单一因素对生物絮凝剂处理效果影响的曲线,确定生物絮凝剂处理纸箱厂废水的最适条件,进行正交实验。实验表明复合型微生物絮凝剂对纸箱厂废水有较好的处理效果。单菌微生物絮凝剂絮凝率在92%以上,COD去除率接近55%,氨氮去除率也达到89%。复合型生物絮凝剂在更少的药剂下能获得比单菌絮凝剂更好的处理效果。絮凝率可达93%,COD去除率达到74%,氨氮去除率达到90%。 相似文献
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玻璃纤维生产废水处理实验研究 总被引:3,自引:0,他引:3
采用混凝 +SBR +活性炭吸附组合工艺对玻璃纤维废水进行了处理试验研究 ,结果表明单独使用高分子有机絮凝剂效果不好 ,而与无机混凝剂复合使用时阳离子有机絮凝剂比阴离子有机絮凝剂效果要好。PAM +与PAC复合使用的最佳pH值为 7.5 ,其最佳配比为 0 .0 0 2 +2 .4g/L。采用SBR生化处理后 ,废水中的有机物得到有效降解 ,出水COD浓度为 1 35mg/L ,去除率达到了 70 %。活性炭对于表面活性剂废水的后处理作用明显 ,COD去除率在 60 %以上。在常温条件下的实验结果 :COD从进水的 90 0mg/L下降到 55mg/L ,去除率93 .9% ,达到国家一级排放标准 相似文献
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采用PAC(聚合氯化铝)和PAFC(聚合氯化铝铁)作为絮凝剂,探讨不同絮凝剂及其投量对于内循环连续砂滤器处理效果和滤料板结潜在趋势的影响.结果表明,PAC和PAFC投量由5mg/L升至30mg/L时,COD和SS的去除率随着投加量的增大均呈现出先升高后降低的趋势.10mg/L为试验水质下的最佳投量,在该投量下,PAC对SS和COD去除率为分别为49.7%和12.9%;PAFC对SS和COD去除率分别为50.6%和13.8%.内循环连续砂滤器主要去除的是相对分子量在3k以上的溶解性有机物,但对相对分子量1k以下的溶解性有机物去除效果不好,总DOC去除率低于5%,需进一步深度处理以满足最新的排放标准.PAFC混合液比PAC混合液黏度低,有利于缓解滤料板结.总体来看,更适合于石化二级出水的混凝剂为PAFC,最佳投量为10-15mg/L,可保障对SS高效去除同时并使内循环连续砂滤器运行更加稳定. 相似文献