共查询到20条相似文献,搜索用时 422 毫秒
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以某日化企业在生产过程中产生的洗涤剂废水为处理对象,以接触氧化法为核心工艺,比较了悬挂式组合填料和移动床生物膜反应器(MBBR)悬浮填料对洗涤剂废水的处理效果。实验结果表明:悬挂式组合填料和MBBR悬浮填料的挂膜启动时间分别为13,25 d;当悬挂式组合填料反应器的DO为4.0 mg/L时,COD和LAS的去除率分别为84.33%和89.06%;当MBBR悬浮填料反应器的DO为3.0 mg/L时,COD和LAS的去除率分别为82.54%和90.31%;当MBBR悬浮填料反应器的COD容积负荷为0.5~1.3 kg/(m3·d)时,平均COD去除率为83.91%,继续增大COD容积负荷,COD去除率仍能保持在80%以上;MBBR悬浮填料在COD的高效降解及高浓度有机废水的处理方面优于悬挂式组合填料。 相似文献
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采用移动床生物膜反应器(MBBR)—厌氧移动床生物膜反应器(AMBBR)—MBBR组合工艺处理高氨氮化工废水。反应器采用几何构型优化、比表面积大的新型YD-25生物载体和DNF-203硝化细菌,实现了同步硝化和反硝化,强化了脱氮能力。采用投加菌种和排泥的方式,经27 d的驯化培养即完成了反应器的挂膜启动。试验结果表明:最佳操作条件为HRT 8 d、MBBR中DO 3 mg/L、进水pH 8.0;在进水COD 2 840~7 437 mg/L、ρ(氨氮)92~179 mg/L、TN 148~258 mg/L、pH 6~8的条件下,出水指标均值为COD 352 mg/L、ρ(氨氮)21.2 mg/L、TN 36 mg/L、pH 7.4,满足排放要求。 相似文献
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采用移动床生物膜反应器(MBBR)—厌氧移动床生物膜反应器(AMBBR)—MBBR组合工艺处理高氨氮化工废水。反应器采用几何构型优化、比表面积大的新型YD-25生物载体和DNF-203硝化细菌,实现了同步硝化和反硝化,强化了脱氮能力。采用投加菌种和排泥的方式,经27 d的驯化培养即完成了反应器的挂膜启动。试验结果表明:最佳操作条件为HRT 8 d、MBBR中DO 3 mg/L、进水pH 8.0;在进水COD 2 840~7 437 mg/L、ρ(氨氮)92~179 mg/L、TN 148~258 mg/L、pH 6~8的条件下,出水指标均值为COD 352 mg/L、ρ(氨氮)21.2 mg/L、TN 36 mg/L、pH 7.4,满足排放要求。 相似文献
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采用两级移动床生物膜反应器(MBBR)预处理高挥发酚含量的石化厂汽提净化水,考察了HRT和DO对废水中挥发酚和COD去除效果的影响。实验结果表明:在两级MBBR总HRT为10 h、MBBR中部废水DO 为1~3 mg/L的条件下, 装置连续运行处理ρ(挥发酚)=110~201 mg/L、COD=644~1 827 mg/L、BOD5/COD=0.15~0.69的废水,两级MBBR处理后出水平均ρ(挥发酚)为17.6 mg/L,挥发酚去除率达87.9%;平均COD为745 mg/L,COD去除率为32.7%;出水BOD5/COD平均为0.68,表明经过两级MBBR处理后,废水的可生化性有所提高,有利于废水的后续生化处理。 相似文献
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构建了基于层次分析法(AHP)和标杆法(BM)的水污染控制技术混合评估模型,并以石化废水达标排放处理技术为例,确定了包含3项一级指标、8项二级指标和14项三级指标的评估指标体系和指标权重。以5种典型石化废水达标排放处理技术工艺为评估对象,获得技术、经济、环境单项评估指数和综合评估指数。评估结果表明,“隔油+气浮+A/O-PACT”和“隔油+气浮+MBBR+催化臭氧氧化+BAF”两种技术工艺综合指数较高。实际应用时,还应根据工程实际情况对指标权重进行调整,因地制宜地选择合适的废水达标排放处理技术工艺。 相似文献
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EGSB—MBBR处理高浓度聚酯废水 总被引:1,自引:0,他引:1
采用膨胀床颗粒污泥反应器(EGSB)—移动床生物膜反应器(MBBR)处理高浓度、难降解(COD≥10000mg/L,BOD5/COD0.3)聚酯废水。实验结果表明:在(37±1)℃、停留时间(HRT)为15.4h、进水COD为10000mg/L的条件下,EGSB反应器容积负荷达5.31kg/(m3.d),COD去除率达95%以上;在室温、HRT为48.0h的条件下,MBBR反应器出水COD100mg/L,BOD530mg/L,出水水质达到GB8978—1996《污水综合排放标准》中的一级排放标准。 相似文献
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Araceli Loredo-Treviño Gerardo Gutiérrez-Sánchez Raúl Rodríguez-Herrera Cristóbal N. Aguilar 《Journal of Polymers and the Environment》2012,20(1):258-265
Plastics are present in a lot of aspects of everyday life. They are very versatile and resistant to microbial attack. Polyurethanes
are used in several industries and are divided in polyester and polyether polyurethanes and there are different types among
them. Despite their microbial resistance, they are susceptible to the attack of fungi and bacteria but the mechanism to elucidate
its biodegradation are unknown. There are reports from bacteria and fungi that are capable of degrading polyurethane but the
studies about the enzymes that attack the plastic are focused on bacterial enzymes only. The enzymes reported are of type
esterase and protease mainly since these enzymes are very unspecific and can recognize some regions in the polyurethane molecule
and hydrolyze it. Fungal enzymes have been studied prior the 1990s decade but recently, some authors report the use of filamentous
fungi to degrade polyurethane and also report some characteristics of the enzymes involved in it. This review approaches polyurethane
biodegradation by focusing on the enzymes reported to date. 相似文献
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Diane R. Smith 《补救:环境净化治理成本、技术与工艺杂志》1998,8(4):87-93
“If we don't change the way we are going, we will end up where we are headed,” the saying goes. Well, with respect to environmental disputes, we are changing the way we are going, and we are doing it primarily through mediation. We are reaching for and finding cooperative, collaborative, and less expensive ways of solving problems. We are using mediation to eliminate or minimize the side effects of environmental issues and problematic sites. We are avoiding or dramatically reducing the “transactional” costs that have devastated so many persons and businesses involved in environmental problems. And we are finding ways to utilize collective intelligence and minimize collective damage through mediation. It's definitely good business. 相似文献
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对高级氧化技术再生吸附剂的研究现状进行了综述,重点介绍了光催化氧化技术、Fenton氧化技术、活化过硫酸盐氧化技术和臭氧氧化技术4种方法再生吸附剂的应用,分析了4种氧化技术用于吸附剂再生的机理,指出了各种再生方法存在的不足,并对后续的研究方向进行了展望。 相似文献
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