Sludge types

Fig. 12. Activated sludge types (a) filamentous bulking (b) nonbulking (c) pinpoint.

FACT is limited to treating biodegradable contaminants. It cannot treat metals, inorganic contaminants, or halogenated compounds. For sludge-type soils that are heavily contaminated with tar, some texture modification may be required prior to treatment. 

Attempts to install MF or UF membranes in conventional biological reactors (of activated sludge type) with recirculation are also promising. Such membranes prevent the outflow of the biomass, thus improving the efficiency of the system. 

Mean Time Residence (years) Time of Deposition Sludge type LAS NP NPIEO PCB... 

FIGURE 44.2 Drying profiles of different sludge types. 

Physicochemical Characteristics of Several Sludge Types Produced by Different Industries... 

Cake discharge from filter presses is fest. After a number of cycles (depending on the sludge type), the filter cloth will require cleaning. This can be accomplished manually or can be performed automatically at preset frequencies with an automatic clodi washer using a jet of l(X)0-psi wash water. 

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