(3)What is the Nitrogen Cycle in the nature?Describe the main processes of nitrogen cycle and draw a schematic graph Almost all the nitrogen in the soil exists in organic molecules,primarily in proteins.When an organism dies.the process of microbial decomposition results in the hydrolytic breakdown of proteins into amino acids.The amino groups of amino acids are removed and converted into ammonia(NH3). Ammonification is brought about by numerous bacteria and fungi.Then ammonia are oxidized by nitrifying bacteria into nitrite and nitrate,which are converted into nitrogen gas by denitrification. (4)What are the fundamental biochemical mechanisms of enhanced biological phosphorus remova process for municipal wastewater treatment? 1)Under anaerobic conditions,phosphorus accumulating organisms (PAOs)release P to bulk liquid. 2)Under aerobic conditions,PAOs adsorb and utilize more P than it released. 3)The P was removed from wastewater water together with excessive waste sludge discharge. 5 (3) What is the Nitrogen Cycle in the nature? Describe the main processes of nitrogen cycle and draw a schematic graph. Almost all the nitrogen in the soil exists in organic molecules, primarily in proteins. When an organism dies, the process of microbial decomposition results in the hydrolytic breakdown of proteins into amino acids. The amino groups of amino acids are removed and converted into ammonia (NH3). Ammonification is brought about by numerous bacteria and fungi. Then ammonia are oxidized by nitrifying bacteria into nitrite and nitrate, which are converted into nitrogen gas by denitrification. (4) What are the fundamental biochemical mechanisms of enhanced biological phosphorus removal process for municipal wastewater treatment? 1) Under anaerobic conditions, phosphorus accumulating organisms (PAOs) release P to bulk liquid. 2) Under aerobic conditions, PAOs adsorb and utilize more P than it released. 3) The P was removed from wastewater water together with excessive waste sludge discharge