18.This procedure is suitable for all urgent conditions including fire, detonation, chemical overflow, flammable gas divulgence, serious power failure and other natural disaster accidents and so on.
19.The state point analysis can be used in the design and operation analysis of the activated sludge system as the RAS ratio, overflow rate and settling characteristics of flocci are varying.
20.In March 2007 a mud flow, or "lahar" flowed down the side of the mountain after the crater lake overflowed, and large eruptions in 1995 and 1996 blanketed the surrounding area in ash.