What are parameters of sewage to be determined Ammonia?
Nutrients in wastewater, such as nitrogen (N), have long been recognized as a source of over enrichment in receiving environments. This over-enrichment can result in explosive plant growth and algae blooms, resulting in eutrophication and fish kills, among other things. As a result, removing these nutrients has become a routine requirement in the treatment of sewage and other waste waters. Nitrification is the process by which ammonia is removed aerobically. This process converts ammonia (NH4) to nitrate (NO3).
Because nitrifying bacteria are more sensitive than carbonaceous bacteria, nitrification should be designed as a separate stage or aerobic treatment after the main BOD removal process. Nitrification should be designed as an additional stage in a package sewage treatment plant, operating in series with the first BOD removal stage.
The average NH4 concentration in domestic sewage influent is approximately 40 mg/L. However, there is a significant caveat to this figure. Concentrations can skyrocket in areas where water usage is lower than average.
Because of the nature of the microbes that affect nitrification, the majority of nitrification occurs after BOD removal or in the carbonaceous stages. As a result, we must add an additional aerobic section proportional to the amount of ammonia we want to remove. Ammonia typically necessitates three to four times the aerobic capacity required for BOD removal. Temperature is also a factor in nitrification. As a result, for cold and temperate climates, we use a ratio of 4 times BOD capacity, and for warm and hot climates, we use a ratio of 3 times BOD capacity.
To achieve the proper level of Ammonia removal (NH4) from wastewater effluent, the procedure followed is known as nitrification, which refers to the conversion of ammonia to nitrate (NO3).
Finally, to convert the Ammonia load to a Population Equivalent (PE) of 100 PE, for example, the Ammonia load will be divided by the equivalent BOD load produced by one normal person per day, or 1 PE.
The additional Nitrification Capacity required to achieve Ammonia will be 15 mg/l in the final effluent, bringing the treatment plant's total required capacity to 400 PE. This can be accomplished in one or two stages in a package sewage treatment plant, or by adding additional treatment capacity.