Intermittent aeration real-time control method for integrated short-range nitrification and anammox simultaneous removal of phosphorus

Abstract

A partial nitrification, anaerobic ammonia oxidation and phosphorous removal integrated intermittent aeration real-time control method belongs to the field of biological sewage treatment. The partialnitrification, anaerobic ammonia oxidation and phosphorous removal integrated intermittent aeration real-time control method comprises, 1, pumping original domestic sewage into an integrated reactor;2, performing intermittent aeration altogether for 11 cycles, every of which includes 20 min of anoxic stirring and 8 min of low-oxygen aeration with a dissolved oxygen content of 0.8-1.2 mg / L; 3, performing settlement and then discharging water, wherein, during every cycle, the hydraulic retention time is 6 h, and the floc sludge age is 30-50 d. The partial nitrification, anaerobic ammonia oxidation and phosphorous removal integrated intermittent aeration real-time control method takes advantages of different sensitivities of ammonia oxidizing bacteria (AOB) and nitrite oxidizing bacteria (NOB) to intermittent aeration so that AOB become dominant bacteria; control over low-oxygen aeration time and sludge age further achieves long-time maintenance of the dominant position of AOB; meanwhile, by directly inletting the original domestic sewage and through long intermittent aeriation cycles, zero investment of external carbon sources and deep nitrogen and phosphorous removal can be achieved. The partial nitrification, anaerobic ammonia oxidation and phosphorous removal integrated intermittent aeration real-time control method has the advantages of being accurate in control, free from carbon source investment, capable of integrating partial nitrification, anaerobic ammonia oxidation and phosphorous removal and the like.

Description

technical field [0001] The invention relates to an intermittent aeration real-time control method for integrated short-range nitrification and anaerobic ammonium oxidation while removing phosphorus, and belongs to the technical field of sewage biological treatment. Background technique [0002] Due to the serious eutrophication of water bodies, many sewage treatment plants are upgrading their standards, and the indicators of total nitrogen and total phosphorus in the effluent are more stringent. There is an urgent need for energy-saving and efficient denitrification and phosphorus removal processes to be put into the standard upgrading and renovation projects of sewage plants. At present, most sewage treatment plants still operate according to the traditional AAO or oxidation ditch mode. It is difficult to meet the total nitrogen and phosphorus standards in the effluent, and they also face many obstacles such as low temperature, low energy and large water volume of urban dom...

AI Technical Summary

Problems solved by technology

However, urban domestic sewage often does not have the environment to control NOB such as high temperature, high PH value, high FA and FNA inhibition, and can only gradually replace the full-process nitrification sludge in the mainstream with short-range nitrification sewage by means of side treatment and bioaugmentation. mud

Experiments have shown that it is difficult to achieve short-cut nitrification stably by controlling low dissolved oxygen or short sludge age alone.

Images