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This chapter deals with processes for biosolids dewatering and septage treatment. Septage is the liquid and solid material pumped from a septic tank or cesspool when it is cleaned. A selection of recent methods that show promising applications is presented. These include: Expressor Press, Som-A-System, CentriPress, screw press, Sun Sludge system, wedgewater bed, vacuum assisted bed, reed bed, biosolids...
Aerobic digestion is the biochemical oxidative stabilization of wastewater sludge in open or closed tanks that are separate from the liquid process system. This method of digestion is capable of handling waste activated, trickling filter, or primary sludges as well as mixtures of the same. Aerobic digestion is based upon endogenous respiration, where in the absence of suitable substrate food, microorganisms...
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