LEESU, UMR MA 102, Université Paris-Est, Agro Paris Tech, 6-8 avenue Blaise Pascal, Champs-sur-Marne, 77455 Marne-la-Vallée Cedex 2, France.
LEESU, UMR MA 102, Université Paris-Est, Agro Paris Tech, 6-8 avenue Blaise Pascal, Champs-sur-Marne, 77455 Marne-la-Vallée Cedex 2, France.
Waste Manag. 2014 Jul;34(7):1217-26. doi: 10.1016/j.wasman.2014.03.028. Epub 2014 May 3.
This paper aims at characterizing the quality of different treated sludges from Paris conurbation in terms of micropollutants and assessing their fate during different sludge treatment processes (STP). To achieve this, a large panel of priority and emerging pollutants (n=117) have been monitored in different STPs from Parisian wastewater treatment plants including anaerobic digestion, thermal drying, centrifugation and a sludge cake production unit. Considering the quality of treated sludges, comparable micropollutant patterns are found for the different sludges investigated (in mg/kg DM - dry matter). 35 compounds were detected in treated sludges. Some compounds (metals, organotins, alkylphenols, DEHP) are found in every kinds of sludge while pesticides or VOCs are never detected. Sludge cake is the most contaminated sludge, resulting from concentration phenomenon during different treatments. As regards treatments, both centrifugation and thermal drying have broadly no important impact on sludge contamination for metals and organic compounds, even if a slight removal seems to be possible with thermal drying for several compounds by abiotic transfers. Three different behaviors can be highlighted in anaerobic digestion: (i) no removal (metals), (ii) removal following dry matter (DM) elimination (organotins and NP) and iii) removal higher than DM (alkylphenols - except NP - BDE 209 and DEHP). Thus, this process allows a clear removal of biodegradable micropollutants which could be potentially significantly improved by increasing DM removal through operational parameters modifications (retention time, temperature, pre-treatment, etc.).
本文旨在描述巴黎城市群不同处理污泥的污染物特性，并评估它们在不同污泥处理工艺（STP）中的命运。为此，在巴黎污水处理厂的不同 STP 中监测了大量优先和新兴污染物（n=117），包括厌氧消化、热干燥、离心和污泥饼生产单元。考虑到处理污泥的质量，发现不同研究污泥的污染物模式相似（以 mg/kg DM-干物质计）。在处理污泥中检测到 35 种化合物。一些化合物（金属、有机锡、烷基酚、DEHP）存在于各种污泥中，而农药或 VOCs 从未被检测到。污泥饼是污染最严重的污泥，是由于不同处理过程中的浓缩现象造成的。至于处理方法，离心和热干燥对金属和有机化合物的污泥污染几乎没有重要影响，尽管热干燥似乎通过非生物转移对几种化合物具有轻微的去除作用。在厌氧消化中可以突出三种不同的行为：（i）无去除（金属），（ii）随干物质（DM）去除而去除（有机锡和 NP），以及（iii）去除量高于 DM（烷基酚-除 NP 外-BDE 209 和 DEHP）。因此，该工艺可有效去除可生物降解的污染物，通过操作参数修改（停留时间、温度、预处理等）增加 DM 去除量，可显著提高去除效果。
