Taking outdoor water supply and drainage design works in comprehensive design of municipal pipeline of C,F zone in Wenhua Yuan district as example,from outdoor hydrant fire system,rainwater drainage system,sewage drainage system and other aspects practical design is introduced,which provide good references for similar works.

In view of the low influent water quantity and low organic matter concentration,A2/O process in a wastewater treatment plant was started up and operated by activated sludge inoculation training methods.

Method of SRT was used to minimize the excess activated sludge production of wastewater treatment plant.

Because the wastewater treatment plant (WWTP) in cold area is difficult to start up with long time to be taken, the bio-augmentation technology with simultaneous addition of activated liquid strain, biological bacterial agent,and activated sludge into AO basin was firstly adopted in the start-up of Harbin Taiping WWTP.