Polymorphic microorganism aggregate autotrophic nitrogen removal integrated device and operation method

Abstract

The invention discloses a polymorphic microorganism aggregate autotrophic nitrogen removal integrated device which is provided with a reaction tank, wherein the reaction tank is internally filled with microorganism aggregates and is provided with a water decanting device with a vertical push rod, fixed packing, an aerator, an online pH value detector, an online dissolved oxygen detector, an online ammonia nitrogen detector and an online nitrate nitrogen detector; the reaction tank is connected with a water inlet pipeline, a water outlet pipeline, a sludge outlet pipeline, an air pipeline, an overflow pipeline, a water inlet pump, a blast blower and an electrically operated valve; the reaction tank is also provided with an online gas flowmeter and a PLC (Programmable Logic Controller); the online gas flowmeter, the online pH value detector, the online dissolved oxygen detector, the online ammonia nitrogen detector and the online nitrate nitrogen detector are all connected with the PLC through signals. An operation method comprises the steps: (1) inoculating sludge; (2) carrying out habituated culture; (3) starting partial nitrification reaction; (4) inoculating anaerobic ammonium oxidization granular sludge; (5) proliferating the anaerobic ammonium oxidization granular sludge; (6) culturing an anaerobic ammonium oxidization bacterium biological film; (7) stably operating the autotrophic nitrogen removal integrated device. The polymorphic microorganism aggregate autotrophic nitrogen removal integrated device is suitable for denitrification treatment of medium and high concentration ammonia nitrogen sewage, simple in structure, high in degree of automation, good in denitrification effect and low in operation cost.

Description

technical field [0001] The invention belongs to the technical field of biochemical sewage treatment, in particular to a device and method for treating medium-high concentration ammonia-nitrogen wastewater with anaerobic ammonium oxidation technology as the core. On the basis of enriching and cultivating ammonia oxidizing bacteria, the device enriches and cultivates anammox bacteria by means of forming granular sludge and biofilm, and utilizes the synergistic effect of ammonia oxidizing bacteria and anammox bacteria in a single reactor Economical and efficient denitrification can be achieved within the system. This device is suitable for treating waste water with high ammonia nitrogen and low carbon nitrogen ratio such as digested sludge dehydration liquid in urban sewage treatment plants. Background technique [0002] Nitrogen pollution is one of the important reasons for the frequent occurrence of eutrophication in water bodies, and it is also the key to sewage treatment a...

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Problems solved by technology

[0004] The anammox process has many technical advantages, and it has been a research hotspot of domestic and foreign experts since the 1980s. However, how to popularize and apply the anammox technology has always been a difficult problem in the world. The generation growth time of anammox bacteria It is very long, about 11 days, and the sludge loss is serious at the initial stage of the anammox process, and the enrichment and cultivation of anammox bacteria is extremely difficult. The start-up period limits the rapid popularization and application of this technology. In order to shorten the start-up time of the anammox process, it is necessary to improve the retention capacity of the reactor for anammox bacteria so that the anammox bacteria can be quickly enriched. The latest The research results show that the formation of granular sludge in the reactor or the addition of new biological fillers can enhance the retention capacity of anammox bacteria, but there are still some technical problems in this technology, including: ① gas production capacity of anammox bacteria Stronger, so the granular sludge is not easy to settle, and it is easy to lose with the effluent; ②The simple biofilm process has a long time for the anammox bacteria to hang the film, the microbial biomass is low, the reactor processing capacity is difficult to improve, and the biofilm is easy to fall off , not easy to store and inoculate in new projects

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