Dear reader, due to some heavy work.we couldn’t touch with u last few months, OK.
Now we see as an with small example!
Aeration tank:
Influent BOD: 250mg/l(after 30% reduction in the Physio-chemical treatment followed by primary clarifier
Process selected: Activated sludge process
Design Condition:
F/M (Food/Microbes) =0.15
MLSS (Mixed Liquor Suspended Solids)=3000 mg/l
Calculation of Aeration Tank Volume: [....]
The orientation in basic water chemistry presented here has included an overview of some of the major impurities present in water and has suggested the nature of the problems they cause.
Table briefly summarizes the most common problems arising from the presence of such major impurities as hardness, iron, and microorganisms. Referring to these same impurities, Table focuses on [....]
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Organic Matter in Water, Nonspecific Tests |
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Test |
Description |
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BOD |
Biochemical oxygen demand. Measures the ability of common bacteria to digest organic matter, usually in a 5-day incubation at 2O |
What is Adsorption and Clarification?: Adsorption – is the grouping together of molecules on the surface of a solid or liquid; such "groupings" are the result of attractive forces between molecules. Activated carbons are highly porous; they contain mazes of interconnecting channels. An imbalance of molecular forces in the walls attracts many substances; these are physically held (adsorbed) by the [....]
What is the Difference Between Incompressible and Compressible Fluids:
The dependency of liquid volume on pressure may be expressed in terms of the coefficient of compressibility. The coefficient is constant over a wide range of pressures for a particular material, but is different for each substance and for the solid and liquid states of the same material. For liquids,volume decreases [....]
NATURAL TREATMENT OF POLLUTANTS IN WATER:Pollutants that can be oxidized by bacteria in the presence of free dissolved oxygen can be aerobically converted to CO2 and H2O. These pollutants, such as domestic sewage and many readily biodegradable industrial wastes, can be destroyed in accordance with the oxygen sag equations presented above, if oxygen is naturally reinjected into the water [....]