In Switzerland MSWI bottom ash has to comply with the legal threshold value for TOC of < 2 wt-% in order to be landfilled. However, TOC contents of this magnitude lead to elevated DOC emissions and associated emissions of ammonium and Cu (aq). Since 2008 the Canton of Zürich therefore pursues a strategy to lower TOC contents in bottom ash by 2020 to 0.5 wt-%. To observe the development of TOC and other constituents, bottom ash has been monitored from 2008 to 2018. Monitoring results indicate that TOC contents < 0.5 wt-% in bottom ash lead to DOC eluate concentrations < 20 mg/l. DOC concentrations of this magnitude are close to Swiss legal criteria for discharge of landfill leachate into surface waters (10 mg/l). The emission results have been obtained by batch eluate tests according to Swiss Waste Legislation. Such laboratory tests only partially simulate real conditions occurring on landfills. To approximate landfill conditions, column tests with recent bottom ashes combined with tests on simple emission forecasting complete the study. The comparison of results from batch and column tests shows similar cumulative concentrations, indicating that batch tests are suitable to evaluate bottom ash quality. The tested modelling approach, based on constant conditions and exponential decrease in concentration, proved adequate to simulate column progressions. The modelled emission forecasts for DOC lies within 33% of column test results. Further, the model demonstrates the differences in flow regime between eluate tests and landfills and promotes better understanding of temporal aspects and the influence of landfill relevant parameters on pollutant mobilisation.

在瑞士，MSWI底灰必须满足<2 wt％的TOC法定阈值才能被填埋。但是，如此大量的TOC含量会导致DOC排放量增加以及相关的铵和Cu（aq）排放量。因此，自2008年以来，苏黎世州一直奉行一项战略，到2020年将底灰中的TOC含量降低至0.5 wt％。为了观察TOC和其他成分的发展，从2008年至2018年对底灰进行了监测。监测结果表明，底灰中TOC含量<0.5 wt％导致DOC洗脱液浓度<20 mg / l。DOC的浓度接近瑞士关于将垃圾渗滤液排放到地表水中的法律标准（10 mg / l）。排放结果已根据瑞士废物法规通过分批洗提测试获得。这种实验室测试仅部分模拟了垃圾填埋场发生的实际情况。为了近似掩埋条件，近期底灰的圆柱试验与简单排放预测试验的结合完成了研究。批处理和柱测试的结果比较显示出相似的累积浓度，表明批处理适合评估底灰的质量。经过测试的建模方法基于恒定的条件和浓度的指数下降，证明足以模拟色谱柱的进展。DOC的模拟排放预测位于柱测试结果的33％之内。此外，该模型展示了洗脱液测试和垃圾填埋场之间流动方式的差异，并促进了对时间方面以及垃圾填埋场相关参数对污染物迁移的影响的更好理解。