Sink/generator manipulation

Due to the stringent limitation on the BFW (no ammonia or AN), no recycled stream can be used in lieu of fresh water (segregation, recycle and interception can reduce but not eliminate anunonia/AN content). Hence, the boiler should not be considered as a sink for recycle (with or without interception). Instead, it should be handled at the stage of sink/generator manipulation. This leaves us with the five... 

As a result of segreg ion, interception and recycle, we have eliminated the use of fresh water in the scrubber leading to a reduchon of fresh water consumption (and influent to biotreatment) by 6.0kg/s. Therefore, the target for segregation, interception and recycle has been realized. Next, we focus our attention on sink/generator manipulation to remove fresh-water consumption in the steam-jet... 

Figure 4,10 illustrates the revised flowsheet with segregation, interception, recycle and sink/generator manipulation. As can be seen from the figure, the flowrate of the terminal wastewater stream has been reduced to 4.8 kg H2O/S. This is exactly the same target predicted in Fig. 4,4. In order to refine the...

Figure 4.10 Optimal solution to the AN case study with segregation, recycle, interception and sink/generator manipulation.

Which units (sinks/generators) should be manipulated for source reduction By what means ... 

Laboratories that manipulate infectious agents, blood, or body fluids may generate waste that is contaminated with these mataials and toxic chemicals. In most cases, blood and body fluids that contain toxic chemicals can be disposed of safely in a sanitary sewer, which is designed to accept biological waste. Approval for such disposal should be requested from the local wastewater treatment works. Chemical concentrations in such waste are typically low enough to be accepted by a local treatment works. OSHA recoimnends that a separate sink be used exclusively for disposal of human blood, body fluids, and infectious waste. It may be prudent to treat blood and body fluids with bleach (usually a 1 10 aqueous dilution of household bleach) prior to disposal in the sanitary sewer. The worker should take care to prevent personal exposure while waste is being discharged into the sewer. 

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