Commercialization of Pressurized Electroosmotic Dehydrator (PED)
Commercialization of Pressurized Electroosmotic Dehydrator (PED)
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DOI：
10.2166/wst.1990.0120
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发表时间：
1990-12
影响因子：
2.7
通讯作者：
S. Kondoh;M. Hiraoka
中科院分区：
文献类型：
--
作者：
S. Kondoh;M. Hiraoka
研究了电渗法在传统压滤机脱水机上的应用，以降低污水处理过程中产生的污泥中的水分。实验实现了生物剩余活性污泥含水率下降到50-60%，这是常规脱水方法所不能达到的。通过对剩余活性污泥的预浓缩、添加电解液和开发特殊的碳电极，新方法已经商业化。此外，扫描电子显微镜的观察使我们能够证明PED工艺对剩余活性污泥的适应性。新开发的脱水器和工艺已在世界上首次在三个商业工厂成功运行。
Application of electroosmosis to conventional filter press dehydrators has been studied to decrease water content in the sludge generated from waste water treatment process. Experiments realized the reduction of water content in the biological excess activated sludge down to 50-60%, which had never been achieved by the conventional dewatering method. The new method has been commercialized by pre-concentration of the excess activated sludge, addition of electrolyte, and development of special carbon electrodes. Moreover, observation using a scanning electron microscope enabled us to demonstrate the suitability of the PED process to the excess activated sludge. The newly-developed dehydrators and processes have been operating successfully at three commercial plants for the first time in the world.