Two-way Role Of Organic Matter On Anammox And Inhibition

Anaerobic ammonia oxidation (ANAMMOX) as a novel technology for biological nitrogen removal comparing with conventional denitrification process, it has the advantages of saving oxygen consumption, no need to add the organic carbon source, low sludge production, high substrate removal and so on. It has become hot spots in domestic and international research. Domestic and foreign scholars have done a large number of laboratory investigation and engineering research, and have obtained remarkable achievements, in the 20 years. Holland, Sweden and other countries have been applied to the practical engineering, and have achieved excellent social benefits. But our country has only gone ahead with the initial pilot study phase currently. The effect of NO2- on the anaerobic ammonia oxidation with no Added organic matter amount, the effect of different concentration organic on Anammox inhibition solved through adding NO2- was studied through continuous cultivation by improved UASB reactor, inorganic carbon source on ammonia nitrogen is serious than that of nitrite nitrogen.Under the condition of no adding the organic matter, when the NO2-N/NH4-N is 1.108,the reactor normally operate, the ammonia nitrogen and nitrate nitrogen removal rate is 97.7% and 98.7%. When the rate of NO2-N/NH4-N is less than 1.108, because the lack of anaerobic ammonia oxidation electron acceptor the reactor rate decline. When the rate of NO2 N/NH4-N is greater than 1.108, anaerobic ammonia oxidation reactor will have a small amount of increase.Adding COD to the reacto with glucose as organic matter, When the inlet COD concentration below 120 mg/L, NH4-N, NO2-N removal rate close respectively to 98.7% and 98.7%,. Both of NH4-n rate is higher than that rate no adding the organic matter in the reactor. Show that when the COD concentration below 120 mg/L, organic matter has a good affect on anaerobic ammonia oxidation reaction. When COD concentration higher than 120 mg/L, NH4-N, NO2-N minimum removal rate is 48% and 99.8%, what is more the removal rate has The trend of dec line. Show that when the COD concentration higher than 120 mg/L, organic matter has inhibitory effect on anaerobic ammonia oxidation reaction.Adding different concentrations of nitrate nitrogen to the deteriorating anaerobic ammonia oxidation reactor, when the NO2-N is 231 mg/L, the rate of NH4-N rises to 94.8%, NO2-N rate closes to 99.8%; When the NO2-N is 306 mg/L, NH4-N rate increase to 99.8%, NO2-N rate dropped to 94.8%. That show that nitrate nitrogen can remove the competitive inhibition case of denitrifying bacteria breeding on anaerobic ammonia oxidation. Calculating the data we find that the reactor's reaction mass ratio of COD, NH4-N, NO2-N is 1.6:1:1.92. This proportion can guarantee anaerobic ammonia oxidation bacteria is not affected by denitrifying bacteria inhibition under the condition of the organic matter,...