Contoh backwash

• Big business was especially multinational in operation; small firms were increasingly backwashed by that activity in local areas.

• Once the backwash step is formed, the flow separates a t the lower edge of the step, and another separation vortex is there induced.

• The vortex is shown in figure 4; the sawdust on the flat bed was lifted up by the backwash vortex, not by the breaker.

• The results so far described indicate that a step such as shown in figure 1 is formed due to the backwash vortex.

• Most designs typically employ backwashing once per day of operation.

• Relaxation and backwashing effectiveness will decrease with operation time as more irreversible fouling accumulates on the membrane surface.

• By contrast with the backwash effects of out-migration, there are also potential positive or ' spread ' effects that need to be taken account of.

• Reversible fouling can be removed by a strong shear force or backwashing.

• Slow sand filters and self-cleaning screen filters employ mechanisms other than backwashing to remove trapped particles.

• The backwash process caused detachment of biofilm from the sulfur media and relocation of the media.

• The vortex is formed at the edge of the swash zone when backwash turns back into an oncoming wave bore.

• Rapid sand filters must be cleaned frequently, often several times a day, by backwashing, which involves reversing the direction of the water and adding compressed air.

• Whereas before backwash the biofilm thickness on the media varied greatly along the height of the reactor, it became more uniform and much thinner after the backwash.

• To take on a service after the war, when there is a sort of bathos, a sort of backwash, is difficult.

• We certainly cannot go back to institutionalised incomes policies, the backwash of which is now presenting such huge problems for public finance.