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1.发明公开Process for the treatment of biological sludge generated by the purification of wastewater 审中-公开一种用于从生物污水处理厂的处理污泥的方法
公开(公告)号：EP1281678A2
公开(公告)日：2003-02-05
申请号：EP02077926.0
申请日：2002-07-18
CPC分类号： C02F11/18 , C02F3/286 , C02F11/14 , Y02E50/343
摘要： A process is described for the treatment of biological sludge generated by the purification of industrial and civil wastewater which comprises the following steps:
(a) acidification of the sludge to a pH ranging from 1.5 to 2.5 and thickening by means of sedimentation;
(b) separation of the thickened sludge and a clarified product;
(c) thermo-chemical treatment of the thickened sludge;
(d) neutralization of the mixture obtained in step (c) to a pH ranging from 5.3 to 6.2;
(e) separation of a solid fraction and a liquid fraction;
(f) drying of the solid fraction obtained in step (e) and recovery of the liquid fraction.
The solid fraction, characterized by a final content of dry product greater than 90%, can be used as an amending substance or fuel, whereas the liquid fraction, characterized by a high biodegradability can be used for the production of biogas or as a carbon and energy source for microorganisms.摘要翻译： 方法描述为通过工业和民用废水的净化该方法包括以下步骤产生的生物污泥的处理：（a）所述污泥的pH范围从1.5到2.5和增稠通过沉淀的方式的酸化; 该增稠的污泥和澄清的产物（B）分离; 浓缩污泥的（C）热化学处理; （D）在步骤（c）至pH范围从5.3到6.2中得到的混合物的中和; （E）的固体部分和液体部分的分离; 在步骤（e）中得到的固体部分和液体部分的回收的（F）干燥。 固体部分，通过干产物大于90％的最终含量为特征的，可被用作关于修改物质或燃料，而液体部分，通过高生物降解性为特征的，可用于生产沼气或 作为碳源和能源为微生物。
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2.发明公开Process for the treatment of biological sludge generated by the purification of wastewater 审中-公开一种用于从生物污水处理厂的处理污泥的方法
公开(公告)号：EP1281678A3
公开(公告)日：2004-01-28
申请号：EP02077926.0
申请日：2002-07-18
CPC分类号： C02F11/18 , C02F3/286 , C02F11/14 , Y02E50/343
摘要： A process is described for the treatment of biological sludge generated by the purification of industrial and civil wastewater which comprises the following steps: (a) acidification of the sludge to a pH ranging from 1.5 to 2.5 and thickening by means of sedimentation; (b) separation of the thickened sludge and a clarified product; (c) thermo-chemical treatment of the thickened sludge; (d) neutralization of the mixture obtained in step (c) to a pH ranging from 5.3 to 6.2; (e) separation of a solid fraction and a liquid fraction; (f) drying of the solid fraction obtained in step (e) and recovery of the liquid fraction. The solid fraction, characterized by a final content of dry product greater than 90%, can be used as an amending substance or fuel, whereas the liquid fraction, characterized by a high biodegradability can be used for the production of biogas or as a carbon and energy source for microorganisms.
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