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The start-up strategy of shortcut nitrification in SBR under low ammonia at room temperature |
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Abstract The start-up of nitrosationin SBR was analyzed with different seeding sludge strategy and influent. The results showed the quickly start up of nitrosation when seeding nitrosation sludge with low dissolved oxygen (DO=0.30mg/L) and no accumulation of nitrite when seeding nitrification sludge after 29days (58 cycels) operation.The rate of nitrosation could be above 60% in 27days (54 cycles) when alternative high-low dissolved oxygen was adopted.No nitrite was accumulated when seeding nitrification sludge under low dissolved oxygen (DO=0.30mg/L),with the effluent of A/O biological phosphorus removal process with the C/N of 0.40~0.93 after 32 cycles, while the start-up of nitrosation was realized with the influent from septic tanks with the C/N of 3.50~5.34.
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Received: 07 May 2012
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