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首页> 外文期刊>Journal of Environmental Science and Health. A, Toxic/Hazardous Substances & Environmental Engineering >Coagulation-flocculation and ammoniacal stripping of leachates from municipal solid waste landfill
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Coagulation-flocculation and ammoniacal stripping of leachates from municipal solid waste landfill

机译：城市生活垃圾填埋场渗滤液的混凝-絮凝和氨气提纯

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The elimination of contamination in leachates from municipal solid waste landfill was studied by sedimentation. The purpose of this study was to evaluate the removal efficiency of turbidity, chemical oxygen demand (COD), suspended solids (SS) and ammonia nitrogen (NH_3). First, by coagulation with aluminium sulphate like inorganic coagulant, and secondly by flocculation with anionic polyacrylamides in quick succession. The use of polyacrylamides after coagulation with Al~(3+) showed a lower SS removal and slow filtration. Turbidity removal efficacy was over 60% if Al~(3+) concentration was 190 mg/L. COD elimination by flocculation was 10 to 20% regardless of adding polyacrylamides. Finally, ammoniacal stripping is made in order to reduce the ammoniacal nitrogen concentration in the supernatant liquid obtained after coagulation with Al~(3+). The most influential variable in ammoniacal stripping was the agitation time.
机译：通过沉淀研究了消除城市固体垃圾填埋场渗滤液中污染物的方法。这项研究的目的是评估浊度，化学需氧量（COD），悬浮固体（SS）和氨氮（NH_3）的去除效率。首先，通过像无机凝结剂一样用硫酸铝凝结，其次通过快速连续地用阴离子聚丙烯酰胺絮凝。与Al〜（3+）混凝后使用聚丙烯酰胺显示出较低的SS去除率和缓慢的过滤。如果Al〜（3+）的浓度为190 mg / L，除浊率可达60％以上。不管添加聚丙烯酰胺，通过絮凝消除的COD率为10％至20％。最后，进行氨气汽提以降低用Al〜（3+）凝结后得到的上清液中氨氮的浓度。在氨气汽提中影响最大的变量是搅拌时间。

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