... big, the efficiency high, occupies a land area, the use scope to be broad few. Widely adapts in ... , printing, papermaking, refinery, leather, steel and iron, machine-finishing, starch, food.In the water treatment domain gas ... sludge. In the water treatment domain gas floats machine the application in below aspect 1, in the ... shrinkage the sludge. dissolves the steam gas to float machine(advection type)