primary treatment secondary treatment

Sewage treated in primary treatment is brought in contact with oxygen and aerobic micro-organisms. They break down the organic matter into harmless materials as CO 2 and H 2 O. Further, chlorination is done to reduce the bacteria. It may be further treated to tertiary level ze..

The organic materials that are biodegradable are treated with the help of decomposers and oxygen. Then, the water is also chlorinated to remove the germ..

Sewage Treatment The ultimate return of used water to the environment is done by treating sewage. Typically, sewage treatment involves three stages. They are primary, secondary and tertiary. The solids are first separated from the waste water. The dissolve..

Iodo alkanes on treatment with alcoholic AgNO 2 gives 80% of nitroalkanes and 20% alkyl nitrites...

Treating cancer is difficult because it is not a single disease and because all the cells in a single tumour do not behave in the same way. Cancer can be controlled in early stages and control depends upon the locations and spread of the cancer. So, the key to cancer treatment is early de..

(I) is maximum when cos f = +1 or f = 0, 2 p , 4 p f = 2n p where n=0,1,2 Now a path difference of l corresponds to the phase difference 2 p . If x is the path difference, th..

This step removes the inorganic pollutants like the nitrates, phosphates, detergents, metal ions, etc. by passing the water through activated charcoal that acts as a filte..

Dormancy in some seeds is broken by treating them with hormones such as gibberellins, cytokinins and ethyle..

Many reagents like hydrobromic acid are capabile of causing racemisation. For e.g., mandelic acid when treated with hydrocarbromic acid forms the corresponding bromo aci..

Consider two simple harmonic sound waves each of amplitude A, frequencies f 1 and f 2 respectively, travelling in the same direction. Let y 1 and y 2 represent the individual displacements of a particle in the medium, that these waves can produce. Then the resultant displacement of the particl..