Siderocapsa sp.,Desulfovibrio sp., Corynebacterium sp., Micrococcus sp., Staphylococcus sp., Bacillus sp. and Acinetobacter sp. separated from the cycling hot water heating of pipeline in Taiyuan were sterilized by using glutaraldehyde (GL) and dodecylbenzyldi methyammonium chloride (DBMAC) indoor, respectively. The results indicated that: (1) the effect of GL and DBMAC concentration at each level on sterilizing 7 bacterial has significant difference, and the mortality of 7 bacterial inc...