cn ny1 tell me bout a project on sewage water?

Question

i need to know all da relevant details like its components(ions) and da reactions involved during treatment and testing

pls reply son its urgent

pls reply soon its urgent

Answer 1

Sewage treatment processes: The following is from wikipedia, the first link below. The second link does into more detail on denitrification.

primary treatment (solids settlement),
secondary treatment (biological treatment of the supernatant and settled solids)
tertiary treatment (additional polishing stages such as lagooning, micro-filtration or disinfection).

Nitrogen removal is effected through the biological oxidation of nitrogen from ammonia to nitrate (nitrification involving nitrifying bacteria such as Nitrobacter and Nitrosomonus), and then by reduction from nitrate to nitrogen gas (denitrification), which is released to the atmosphere. These conversions require carefully controlled conditions to encourage the appropriate biological communities to form. Sand filters, lagooning and reed beds can all be used to reduce nitrogen. Sometimes the conversion of toxic ammonia to nitrate alone is referred to as tertiary treatment.

Phosphorus removal can be effected biologically in a process called enhanced biological phosphorus removal. In this process specific bacteria, called Polyphosphate accumulating Organisms, are selectively enriched and accumulate large quantities of phosphorus within their cells. When the biomass enriched in these bacteria is separated from the treated water, the bacterial biosolids have a high fertilizer value. Phosphorus removal can also be achieved, usually by chemical precipitation with salts of iron (e.g. ferric chloride) or aluminum (e.g. alum). The resulting chemical sludge, however, is difficult to dispose of, and the use of chemicals in the treatment process is expensive. Although this makes operation difficult and often messy, chemical phosphorous removal requires significantly smaller equipment footprint than biological removal and is easier to operate.

Chlorine or ozone may be added to the water to disinfect it.

Answer 2

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