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Difficult problems for low-carbon high nitrogen the aging landfill leachate denitrification carried out based on the sequence of the batch biofilm reactor SBBR the biological autotrophic denitrification technology research and study obtained nitrosated system quickly build on DO ammonia load, biofilm density, pH and temperature factors such as the impact of the SBBR reactor partial nitrification system, the key control parameters obtained efficient reactor partial nitrification. Shortcut nitrification reactor can withstand limit discussed under the conditions of high ammonia nitrogen, ammonia concentration. Ammonia load and temperature on autotrophic nitrogen removal effect, build a two SBBR autotrophic denitrification system, to achieve efficient autotrophic denitrification. The study reached the following main conclusions: ① SBBR shortcut nitrification Factors Influencing: DO, ammonia load, the hanging film density and pH the SBBR reactor partial nitrification impact significant. Parameters of the optimal conditions for: the hanging film density of 60%, the pH was 8.0, the DO of 2.5 mg / L, the ammonia load 0.9kgNH3-N / (m3 · d) In this case, the nitrite accumulation rate 83.1%; the shortcut nitrification ② two SBBR reactor: studies have shown that high ammonia load operation to adapt to the environment of high ammonia microbial systems, the first level SBBR reactor. Reactor at a temperature of 30 ℃, the hanging film density of 60%, the DO of 2.5 mg / L, HRT was 24h, first-class and second-class SBBR reactor ammonia load were 1.2kgNH3-N / (m3 · d) influent ammonia can and 0.1kgNH3-N / (m3 · d) conditions 1200mg / L of high ammonia landfill leachate, the effluent ammonia ≤ 11mg / L, the removal rate of 99%, landfill leachate level emissions standards. Compared with nitrification system SBBR II, under the same load, the two SBBR partial nitrification system pool capacity reduced by 30%. (3) ammonia concentration of the the partial nitrification impact study showed that: the high concentration ammonia partial nitrification impact significantly when the ammonia concentration in the reactor was 3000mg / L FA 194.39mg / L, ammonia removal efficiency was 56.7%, the accumulation of nitrite rate of 91%, the nitrosated bacteria showed better activity. The the ④ SBBR reactor autotrophic denitrification study showed that: a temperature of 28 ° C, the hanging film density of 60%, DO 4.5 5 mg / L, HRT was 24h, first-class and second-class SBBR ammonia nitrogen load of the reactor were 0.82 kgNH 3 -N / (m 3 · d) and 0.22kgNH 3 -N / (m 3 · d) conditions, the influent ammonia can to 3300mg / L, BOD5 120mg / L of high ammonia landfill leachate, effluent ammonia nitrogen, TN and COD concentration for 110.57mg / L, 434 mg of / L and 2852mg / L, the removal rates were 96.6%, 87.4% and 10%. The results of the study will be low-carbon high nitrogen landfill leachate efficient denitrification provide a new way, and to provide a scientific basis for its engineering practice, research has important practical significance and practical value.
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