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填埋物浸出液是水流入填埋的市政固体废料时 ,废料降解和浸出时产生的高度污染的废水。随产地和时间的不同 ,它们的组成变化很大。它们含有生物降解化合物、无机盐和污染物。通常 ,在废弃物管理工业中 ,在向环境排放前需要处理它们 ,以降低生化氧需要量、化学氧需要量和氨氮含量。试验表明 ,填埋物浸出液可部分或全部代替浮选中的起泡剂和捕收剂。可以认为 ,填埋物浸出液中含有的挥发脂肪酸具有起泡作用和捕收作用。较新鲜的浸出液比陈放的浸出液要好 ,因为 ,细菌作用使陈放过的浸出液中的挥发性脂肪酸含量减少。用隔膜过滤法可富集其中的有机化合物 ,大幅度降低这种药剂的运输费用和体积。填埋气体冷凝物也是挥发脂肪酸提纯和富集的来源。滤液经浮选后生化氧需要量大大降低 ,因为矿物表面和泡沫的吸附 ,除去了挥发的脂肪酸。浸出液中的氨氮化合物留在水相中 ,形成了需要处置的尾矿水成份。适当浓度的氨氮化合物有利于尾矿植被。本文叙述了用填埋物浸出液及其微孔浓缩物的浮选结果。讨论了浮选尾矿栽培植物的潜在优点。
Landfill leachate is highly contaminated waste water that is produced when waste streams degrade and leach as it flows into landfilled municipal solid waste. Their composition varies greatly depending on origin and time. They contain biodegradable compounds, inorganic salts and contaminants. Often, in the waste management industry, they need to be disposed of before they are discharged to the environment to reduce their biochemical oxygen requirements, chemical oxygen demand, and ammonia nitrogen content. Tests have shown that landfill leachate may partially or completely replace foaming agents and collectors in flotation. It is considered that the volatile fatty acids contained in the leachate of the landfill have the function of foaming and catching. Fresher leachate is better than laden leachate because the bacterial action reduces the amount of volatile fatty acids in the leached liquor that has expired. Membrane filtration can be used to enrich the organic compounds, which greatly reduce the cost and volume of transportation of such medicaments. Landfill gas condensate is also a source of volatile fatty acid purification and enrichment. Flotation by the filtrate biochemical oxygen demand greatly reduced, because the adsorption of mineral surface and foam, remove the volatile fatty acids. Leaching solution of ammonia nitrogen compounds remain in the water phase, forming the tailings water components need to be disposed of. Appropriate concentration of ammonia nitrogen compounds favor tailings vegetation. This article describes the flotation results of landfill leachate and its microporous concentrates. The potential benefits of cultivating flotation tailings are discussed.