在污水污泥堆肥和曝气过程中去除邻苯二甲酸二（2-乙基己基）酯（DEHP）

Removal of DEHP in composting and aeration of sewage sludge.

作者信息

Marttinen Sanna K, Hänninen Kari, Rintala Jukka A

机构信息

Department of Biological and Environmental Science, University of Jyväskylä, P.O. Box 35, FIN-40014 Jyväskylä, Finland.

出版信息

Chemosphere. 2004 Jan;54(3):265-72. doi: 10.1016/S0045-6535(03)00661-1.

DOI:10.1016/S0045-6535(03)00661-1

PMID:14575738

Abstract

The potential of composting and aeration to remove bis(2-ethylhexyl) phthalate (DEHP) from municipal sewage sludge was studied with two dewatered sludges: raw sludge and anaerobically digested sludge. Composting removed 58% of the DEHP content of the raw sludge and 34% of that of the anaerobically digested sludge during 85 days stabilisation in compost bins. A similar removal for the anaerobically digested sludge was achieved in a rotary drum in 28 days. Less than 1% of DEHP was removed with the compost leachate. Although DEHP removal was greater from raw sludge compost than anaerobically digested sludge compost, the total and volatile solids removals were on the same level in the two composts. In the aeration of raw sludge at 20 degrees C the DEHP removals were 33-41% and 50-62% in 7 and 28 days, respectively. Both composting and aeration are concluded to have the potential to reduce the DEHP contents typically found in sewage sludges to levels acceptable for agricultural use.

摘要

采用两种脱水污泥（生污泥和厌氧消化污泥）研究了堆肥和曝气从城市污水污泥中去除邻苯二甲酸二（2-乙基己基）酯（DEHP）的潜力。在堆肥箱中进行85天的稳定化处理期间，堆肥去除了生污泥中58%的DEHP含量以及厌氧消化污泥中34%的DEHP含量。在转鼓中28天内，厌氧消化污泥实现了类似的去除效果。堆肥渗滤液去除的DEHP不到1%。尽管生污泥堆肥中DEHP的去除量高于厌氧消化污泥堆肥，但两种堆肥中总固体和挥发性固体的去除水平相同。在20℃下对生污泥进行曝气，7天和28天内DEHP的去除率分别为33%-41%和50%-62%。得出结论，堆肥和曝气都有潜力将污水污泥中通常存在的DEHP含量降低到农业使用可接受的水平。