共查询到20条相似文献,搜索用时 15 毫秒
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采用气浮-混凝-Fenton氧化组合工艺对垃圾渗滤液进行处理。试验研究结果表明,最佳气浮条件:气水比为45~60mL/L、氧化石蜡皂用量为300mg/L、气浮时间为15min;最佳混凝条件:PAM投加量为9mg/L、PAC投加量为1100mg/L、pH值为5、搅拌强度为200r/min;最佳Fenton氧化条件:pH值为3,Fe2+投加量为0.04mol/L,n(H2O2)/n(Fe2+)为15,反应时间为90min。垃圾渗滤液经过气浮-混凝-Fenton氧化处理后COD、NH3-N得到了较好的去除,最终出水COD、NH3-N、TP可达《生活垃圾填埋场污染控制标准》(GB16889—2008)中的排放浓度限值。 相似文献
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以成都市长安垃圾填埋场渗滤液为研究对象,在常规水质分析的基础上,利用GC-MS联用技术对其中的有机污染物进行检测,考察了有机污染物的种类和性质对垃圾渗滤液可生化性的影响.研究结果表明:垃圾渗滤液的可生化性受有机污染物种类和性质的直接影响.在可生化处理的垃圾渗滤液A中(BOD_5/COD_(Cr)为0.3~0.4),检出的有机污染物主要是有机酸类物质,约占90%;在不易生化处理的垃圾渗滤液B中(BOD_5/COD_(Cr)<0.15),检出的有机污染物主要是烷烃类物质,约占50%.研究为垃圾渗滤液的处理提供了新思路. 相似文献
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电催化氧化法处理垃圾渗滤液中氨氮的研究 总被引:7,自引:0,他引:7
采用电解槽对垃圾渗滤液进行电解催化处理研究,考察不同的极板间距、电流密度、氯离子的质量浓度等对电解效果的影响。结果表明,极板间距为1.0 cm,电流密度为10 A/dm2,氯离子质量浓度为5 000 mg/L时,该法对中等浓度的垃圾渗滤液中的氨氮有较好的处理效果,对氨氮的去除率能达到97.3%。 相似文献
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采用Fe/C微电解和Fe/C微电解-Fenton氧化联合工艺对垃圾渗滤液进行处理,研究了废水初始pH、药剂投加量、药剂投加比例和反应时间等对处理效果的影响,获得Fe/C微电解处理垃圾渗滤液的最佳工艺条件:初始pH=3、m(Fe)/m(C)为4、ρ(Fe/C)为0.6 g/L、反应时间为60 min,处理后COD降至5 960 mg/L,COD去除率达51.8%。Fe/C微电解-Fenton氧化处理垃圾渗滤液的最佳工艺条件:在Fe/C微电解最佳条件下,H2 O2投加量为11 mL/L,反应时间为100 min,出水COD为4 480 mg/L,COD总去除率为63.8%。垃圾渗滤液中的腐殖酸类有机质经过Fe/C微电解或微电解-Fenton氧化处理后变成小分子产物,与Fe/C微电解相比,Fenton氧化对腐殖酸等大分子有机质有更强的氧化降解效果。 相似文献
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采用混凝沉淀-Fenton氧化处理垃圾渗滤液生化处理出水,通过单因素试验研究了混凝沉淀和Fenton氧化中各因素对去除CODCr的影响,试验结果表明,最佳混凝试验工艺条件为:复合混凝剂比例n(无机组分)∶n(有机组分)为4.0∶1、p H值为8.5、混凝剂投加量0.6 g/L,CODCr的去除率可达到88.6%。Fenton氧化阶段,当体系p H值为4.0、H2O2投加量为16 mg/L、Fe SO4·7H2O投加量为6 g/L、反应时间为110 min时,CODCr去除率高达95.9%。 相似文献
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Combined processes for wastewater purification: treatment of a typical landfill leachate with a combination of chemical and biological oxidation processes 下载免费PDF全文
Deniss Klauson Arthur Kivi Eneliis Kattel Kati Klein Marika Viisimaa Juri Bolobajev Siiri Velling Anna Goi Taavo Tenno Marina Trapido 《Journal of chemical technology and biotechnology (Oxford, Oxfordshire : 1986)》2015,90(8):1527-1536
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电化学氧化法预处理垃圾渗滤液的研究 总被引:1,自引:0,他引:1
通过电化学氧化法对垃圾渗滤液进行预处理,用正交实验方法确定最佳的反应条件,对处理前后的有机组成进行GCMS分析。结果表明,较佳电氧化条件为:处理时间120 min,电流密度7.5 A/dm2,极板间距5 mm,阳极板材为SnO2/Ti,阴极为不锈钢,NaCl投加量为2 g/100 mL。在此条件下,当进水COD浓度为44 100 mg/L时,出水浓度为1 369 mg/L,去除率达到68.94%,氨氮进水浓度为4 085 mg/L时,出水浓度为1 209 mg/L,去除率达到了70.4%。有机物的去除明显,挥发性有机物增多,能够达到对高浓度垃圾渗滤液进行预处理并有利于后续的生化处理的目的。 相似文献
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Rodrigo Poblete Ernesto Cortes José Bakit Yolanda Luna-Galiano 《Journal of chemical technology and biotechnology (Oxford, Oxfordshire : 1986)》2020,95(5):1550-1558
This study focuses on the removal of organic pollutants present in landfill leachate (LL) using an adsorption process with activated carbon (AC) obtained from fish scales, and subsequently evaluates the reduction of toxicity in the wastewater obtained from the process. The AC obtained is a mesoporous material, with a cumulative pore area of 1.57 m2 g−1, Brunauer–Emmett–Teller (BET) of 1.8329 m2 g−1 and adsorption average pore width of 12.79833 nm. The maximum removal of pollutants was achieved at natural pH (6.71) of the LL, with a load of 3 g L−1, resulting in 60.1% colour and 37.3% chemical oxygen demand (COD). The rate of COD removal per g of AC increase had a maximum value of 5.6 at pH 10 when passing from 0.5 to 1 g AC. The lowest rate of 0.6 occurred for the same pH when it passed from 1 to 2 g AC. At pH 3 the second lowest rate of 3.3 was observed when passing from 2 to 3 g AC. At pH 3 there was always an increase in the rate as more AC was added. Conversely, at natural pH 6.71 the rate tended to decrease. At pH 10 the rate first decreased and then increased. At acidic pH, because it is the one with the lowest COD removal, it would be expected that by adding more AC the rate would continue to increase as there are easily accessible sites still available. Langmuir isotherms fitted adequately with the experimental data, providing an R2 of 0.9657, which is consistent with a monolayer adsorption pattern. The LL before the adsorption process had an inhibition ratio of 20.4%, due to the fact that leachate can be toxic because of the presence of hazardous organic compounds. After adsorption processes at pH 6.71, the inhibition ratios were 16.9%, 13.8%, 12.2% and 10.9% at AC loads of 0.5, 1, 2 and 3 g L−1, respectively, due to decreasing COD and colour of the LL over the course of the treatment. It was observed that the reduction of the inhibition ratio was greater at higher loads of adsorbent. © 2020 Society of Chemical Industry 相似文献
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蒸发法处理垃圾填埋场渗滤液的实验研究 总被引:1,自引:0,他引:1
用实验的方法研究蒸发法处理垃圾填埋场渗滤液,结果表明:降低压力在负压的状态下进行蒸发实验,COD的处理效果好于常压下的蒸发效果,NH_3-N的蒸发则不受蒸发压力变化的影响:而在降低原液pH进行蒸发的情况下,虽然不能改善COD的处理效果,但是NH_3-N的去除率得到较大提高;在常压蒸发时发现冷凝液中COD的增大主要发生在蒸发后期(浓缩倍数≥10时),前期有小幅度的蒸发,中期几乎不变.NH_3-N的蒸发则和COD恰恰相反,它的蒸出主要发生在蒸发前期,后期有少量蒸发,中期和COD一样蒸发量几乎为零;实验还对渗滤液进行了二级蒸发研究,发现效果并不理想. 相似文献
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