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The use of pure oxygen for activated sludge treatment has become competitive with the use of air owing to the development of efficient oxygen dissolution systems. The pure oxygen system may be used for aeration in activated sludge systems that operate in either the plug flow or complete mix hydraulic regimes. It is readily adaptable to new or existing complete mix systems and can be used to upgrade...
Biological technologies can be used to treat a vast majority of organic wastewaters because all organics could be biologically degraded if the proper microbial communities are established, maintained, and controlled. Before environmental engineers design and operate biological treatment systems that create the environment necessary for the effective treatment of wastewater, a sound understanding of...
Membrane bioreactor (MBR) is a biochemical engineering process involving the use of both (a) a suspended growth bioreactor for biochemical reactions (such as fermentation, bio-oxidation, nitrification, and denitrification); and (b) a membrane separator for sequent solid–liquid separation. In a chemical engineering fermentation process, the solids may be yeasts and the liquid may be an alcohol. In...
A novel columnar bioreactor system comprising an integrated bioreactor clarification system with layers of pseudoliquified activated sludge was demonstrated at a pilot scale for the treatment of municipal wastewaters. The system was mechanically simple, avoiding the need for any mechanical components for biomass recirculation, mixed liquor recirculation, and sludge collection and wastage. Wastewater...
Membrane bioreactor (MBR) is a biochemical engineering process involving the use of both (a) a suspended growth bioreactor for biochemical reactions (such as fermentation, bio-oxidation, nitrification, and denitrification) and (b) a membrane separator for subsequent solids–liquid separation. In a chemical engineering fermentation process, the solids may be yeasts and the liquid may be an alcohol....
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