Reverse technology transfer of low cost and energy consuming wastewater treatment system in India to step out of traditional activated sludge process

幕式DHS(Down-Flow Holding Sponge)反应器在发展中国家已被用于污水处理，但预计不会产生适用于发达国家的良好水质。然而，尽管DHS是一种非常经济有效和节能的工艺，但研究表明，UASB和DHS系统具有与活性污泥法相当的出水效果，而污泥产量更少。本研究通过借鉴印度在污水处理实验中积累的经验，尝试为日本等发达国家开发新型的DHS反应器。

Curtain type DHS(Down-flow Hanging Sponge) reactor has been studied for sewage treatment in developing countries, which was not expected to produce a good water quality applicable for developed countries. However, even though DHS is very cost effective and energy saving process, it was revealed that a system of UASB and DHS had a good effluent comparable to activated sludge process with less sludge production. In this study, novel DHS reactor for developed countries like Japan was tried to develop by transferring the knowhow accumulated in sewage treatment experiments in India.