Positive Draft Of Air Flow

The choice between the two alternative designs would have to be made on the basis of economics and other such factors since they should both give similar performance. This example illustrates the relationship between THL and media depth for a fixed media volume. Although it is recognized today that a minimum THL must be maintained to fully utilize the media and that recirculation can be used to achieve that THL, analysis of historical studies suggests that this requirement was not widely...

Step Feed Activated Sludge

Phostrip Process

Figure 7.10 presents the schematic diagram for the configuration used to simulate an SFAS system. As in Figure 7.1, five equal sized CSTRs in series were used, with all biomass recycle to the first bioreactor, but in this case the feed was distributed evenly among the bioreactors. All other characteristics of the system, including the flow rates, feed concentrations, etc., were the same as those used to simulate the performance of the tanks-in-series system. 7.3.2 Effect of SRT on Steady-State...

Conventional And High Purity Oxygen Activated Sludge

Cstr Activated Sludge

Figure 7.1 presents a schematic diagram of the system used to simulate conventional and high purity oxygen activated sludge systems. All influent and all biomass recycle enters the first bioreactor and passes from bioreactor to bioreactor down the chain. For the purposes of this chapter, the bioreactors were considered to be of equal volume, but different residence time distributions can be attained by using bioreactors of different size.1* The influent flow rate used in simulations was 1000 m'...