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Explain the Activitated Sludge (Aeration Tank)?
The activated sludge treatment process is a biochemical oxidation process. Organic solids are stabilized through the oxidation process in the activated sludge basin. This basin is also referred as aeration tank and the process is known as suspended growth process. The incoming waste to the activated sludge basin is composed of inorganic and organic solids. The organic portion of the incoming waste is responsible for the BOD and it represents the Food (F) for the microorganisms in the activated sludge basin.
The solids in the activated sludge basin are called mixed liquor suspended solids (MLSS). These solids are composed of an organic (MLVSS) and an inorganic part (MLFSS). The MLVSS is often considered to represent the microorganisms in the activated sludge basin. The stabilized organic solids are removed in the secondary sedimentation basin. Most of stabilized solids are returned or recycled to the activated sludge basin. Part of the stabilized solids is wasted each day. The wastewater from the aeration tank then flows over the secondary sedimentation basin (where the solids have been removed) and to the disinfection basin and then discharged to the receiving stream.
Explain the Confined Aquifer and Piezometric Surface Confined Aquifer Groundwater is confined by impervious geologic stratums on all sides. The water may be under pressure.
The state of a pure substance of given mass is defined by specifying two appropriate properties provided that 1. The system is in equilibrium 2. Gravity, motion, electricity,
I am a Civil Engg student. Why CBR Values determined only at 2.5 and 5 mm penetration ?.
Uncompacted bedding for concrete pipes In the middle third of the base of precast concrete pipes, bedding layers are suggested to be left Uncompacted since it helps to decreas
Light Rail Transit (LRT) Light Rail Transit is also known by the name train. LRT can be run on the surface if road space is available (as in Kolkata) or as elevated, with pil
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Explain Chlorine Residuals Free Chlorine Residuals: Cl 2 , HOCl, OCl- Combined Chlorine Residuals: Chloramines (mono, di and tri chloramines) The disinfecting ability o
design a 3-meter cantilever slab to carry a uniform total dead load of 8.2KN/m^2 and a concentrated live load at the free end of 30 KN/m. f''c=28Mpa fy=420Mpa.
Define the term - pre- tensioning It is a method of prestressing in which tendons are placed, inside ducts or passages provided in concrete, after concrete gains sufficient str
actual meaning of it? Is it a unit to measure the functions of enviroment?
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