| Anaerobic ammonium oxidation (ANAMMOX) technique is fully autotrophic biological denitrification technology, it is the most development prospects and is recognized as a high efficiency and low energy consumption biological denitrification technique in recent years, the ANAMMOX is a biological reaction process, it refers to in anaerobic conditions, microorganisms directly use NH4+-N as electron donor and N02--N as electron acceptor, make NH4+, NO2-directly translate into N2. The technology process of nitrogen conversion can be shorten, with the advantages of less oxygen consumption, no need of extra carbon sources and little sludge quantity etc, it is the most development prospects new technique of biological denitrification.The thesis specific to the municipal wastewater with the characteristics of relatively low concentration of influent ammonia nitrogen and the not very high temperature, in the running conditions of low water concentration and short HRT, investigated the highly efficient and stable operation feasibility of ANAMMOX process in the municipal wastewater treatment; As in the actual application process, a small amount of organic matter contained in the influent water, the change of pH and temperature etc might have a negative impact on ANAMMOX process, therefore, we need in-depth study to the effect of trends and scope on organic matter in the influent water, pH and temperature changes to ANAMMOX process and the Inhibit and eliminate technology, it lied an important foundation for the practical application of the ANAMMOX process in the field of municipal wastewater treatment.An up-flow anaerobic packed-bed reactor with the total volume of101.4L and the effective volume of88.7L was used in the experiments of the thesis to start up the ANAMMOX process, and experimentally investigated the running results and impacts of the factors as temperature, pH and C/N to ANAMMOX process after the stable operation.After104days operation the reactor successfully startup, and at the119day the removal rate of NH4+-N and NO2--N increased to100%and97.40%, while the TN removal rate was91.71%. The ratio between the three types of nitrogen-contained substance, p (NH4+-N):p (NO2-N):p (N03--N) was1:1.35:0.28.Then the HRT was decreased to increase the loading rate of the reactor:form35.5h to6.5h, at the end of the operation, the loading rate of TN was0.20kg/(m3/d), and the removal rate of NH4+-N, NO2--N and TN were95.59%,98.85%and86.15%, the ratio of the three kinds of nitrogen in the stable during the operation of ANAMMOX reaction process has not changed. Sludge obtained with the anaerobic ammonia oxidation activity was reddish brown, the shape was a round ball. The thesis studied the impact of temperature on the process of ANAMMOX. In five different temperature conditions33℃,28℃,23℃,18℃and13℃, controlling the other factors at the same conditions, investagated the different temperatures in the reaction of ammonia nitrogen and nitrite nitrogen concentration changes on ANAMMOX reaction, obtained the temperature range and the optimum temperature values of ANAMMOX.The thesis investagated the effect of pH on the ANAMMOX process. In five different pH conditions6.5,7.0,7.5,8.0and8.5, studied the changes of the ammonia oxidation rate with pH changes, and determined the optimum pH control range of the reaction, and fitted to solve the optimum pH of ANAMMOX process, it created conditions for the future deep research.The thesis also researched the effect of C/N on the ANAMMOX process. Setted the C/N as0.2,0.4,0.6,0.8and1.0, respectively researched the degradation rate of the ammonia nitrogen and nitrite nitrogen, and obtained the relationship of organic compounds on the ANAMMOX reaction. |
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