前置反硝化-高负荷地下渗滤系统深度脱氮研究
Study on Advanced Nitrogen Removal by High Hydraulic Loading Subsurface Infiltration System with Pre-denitrification
查看参考文献25篇
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文摘
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针对高负荷地下渗滤系统TN去除率低的问题,研究将渗滤出水回流与原污水混合,进入前置反硝化单元。结果表明,当回流体积比分别为0.5:1、1:1和2:1时,系统对NH_4~+-N的去除率高于92%,且出水NH_4~+-N的质量浓度低于0.5 mg/L;前置反硝化单元对NO_3~--N去除率分别为91.0%、83.0%和64.2%,而系统对TN去除率仅为18.6%、31.2%和30.8%。在回流体积比为2:1时,将原污水COD/ρ(TN)调为6,以与常规生活污水C/N相同,此时反硝化单元的NO_3~--N去除率升至95.2%,而系统TN去除率升至57.1%,且出水TN的质量浓度低于15 mg/L。因此,如果采用该组合工艺处理常规生活污水(COD/ρ(TN)大于6),可使其最终出水TN和NH_4~+-N含量达到更严格的排放标准。 |
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其他语种文摘
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Aimed at promoting the total nitrogen removal of high hydraulic loading subsurface infiltration system(HLS),the pre-denitrification device was employed to treat the HLS effluent mixed with raw sewage.The results showed that the removal rates of NH_4~+-N were over 92% and the mass concentration of NH_4~+-N in effluent was lower than 0.5 mg/L no matter the reflux volume ratios were 0.5:1,1:1 and 2:1,while the NO_3~--N removal rates were 91.0%,83.0%,and 64.2% respectively in the pre-denitrification device,and the TN removal rates were only 18.6%,31.2%,and 30.8% respectively in the combined system.The COD/ρ(TN)of the raw sewage was adjusted to 6 same as the ordinary sewage when the reflux volume ratio was set at 2:1,the removal rate of NO_3~--N in pre-denitrification device was increased to 95.2% and TN in the whole system was increased to 57.1%,and the mass concentration of TN in effluent was less than 15 mg/L.Therefore,the TN and NO_3~--N content of treated effluent from the combined system could meet the stricter discharge standard when it was applied to treat the sewage with higher COD/ρ(TN)(≥6). |
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来源
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水处理技术
,2018,44(10):89-93 【核心库】
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DOI
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10.16796/j.cnki.1000-3770.2018.10.019
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关键词
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高负荷
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地下渗滤系统
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前置反硝化
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回流比
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碳氮比
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地址
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中国科学院广州地球化学研究所, 中国科学院矿物学与成矿学重点实验室;;广东省矿物物理与材料研究开发重点实验室, 广东, 广州, 510640
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中国科学院大学, 北京, 100049
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1000-3770 |
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学科
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行业污染、废物处理与综合利用 |
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基金
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广东省科技计划项目
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广东省广州市科技计划项目
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中国科学院广州地球化学研究所“一三五”规划项目
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文献收藏号
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CSCD:6381666
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