CN101618911B - Method of realizing one-step autotrophic nitrogen removal under higher levels of dissolved oxygen - Google Patents
Method of realizing one-step autotrophic nitrogen removal under higher levels of dissolved oxygen Download PDFInfo
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- CN101618911B CN101618911B CN2009101044171A CN200910104417A CN101618911B CN 101618911 B CN101618911 B CN 101618911B CN 2009101044171 A CN2009101044171 A CN 2009101044171A CN 200910104417 A CN200910104417 A CN 200910104417A CN 101618911 B CN101618911 B CN 101618911B
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Abstract
The invention discloses a method for realizing one-step autotrophic nitrogen removal under higher levels of dissolved oxygen. When high ammonia nitrogen low C/N wastewater is treated, a sequencing batch biofilm reactor is adopted, of the reactor has the operation modes as follows: water is flooded in for 0.5-1.5h, the reaction lasts for 20.5-94.5h, the settlement and the water discharge last for 1.0-2.0h, the water discharge ratio is 0.5, the water power is remained for 48-192h under the conditions that the temperature is 25-35 DEG C and the pH value is 7.0-8.5; the intermittent aeration and the aeration time are as follows: the one-step autotrophic nitrogen removal process can be realized by controlling the concentration of dissolved oxygen (DO) in the reactor of the aeration stage to be higher level of 1.8-2.5g/L and the concentration of the DO at the aeration stop stage under the condition that the aeration stop time is 1:1. The invention broadens the concentration range of the dissolved oxygen of the one-step autotrophic nitrogen removal process, lowers the difficulty of the operation and the management of a one-step autotrophic nitrogen removal system, and enables the operation mode of the one-step autotrophic nitrogen removal system to be more flexible.
Description
Technical field
The present invention relates to a kind of novel method that realizes one-step autotrophic nitrogen removal technology, can under higher levels of dissolved oxygen, realize one-step autotrophic nitrogen removal technology, with the high-ammonia nitrogen low C/N ratio wastewaters such as animal excrement waste water of percolate, sludge of sewage treatment plants lye and the poultry farming field for the treatment of refuse landfill yard.
Background technology
One-step autotrophic nitrogen removal technology is meant under the situation that does not add organic carbon source, finishes the class technology of ammonia nitrogen to whole conversion processes of nitrogen by the autotrophic bacteria in the same structures.One-step autotrophic nitrogen removal technology is particularly suited for the waste water of class high-ammonia nitrogen low C/N ratios such as animal excrement waste water of percolate, sludge of sewage treatment plants lye and the poultry farming field for the treatment of refuse landfill yard.
One-step autotrophic nitrogen removal technology is to be united with the Anammox reaction that occurs in inner space by the nitrosation reaction that occurs in microbial film or active sludge flco outer space to finish.Because nitrosation reaction is an aerobic processes, and the Anammox reaction is anaerobic process, therefore, is to realize the key of one-step autotrophic nitrogen removal technology to the system constraint oxygen supply to make up microenvironment aerobic and the anaerobism coexistence.At present both at home and abroad the investigator generally believes that one-step autotrophic nitrogen removal technology needs could realize under dissolved oxygen concentration (DO) is lower than the lower level of 1.0mg/L, make the span of control of one-step autotrophic nitrogen removal system dissolves oxygen very narrow, brought certain degree of difficulty for the control of one-step autotrophic nitrogen removal system dissolves oxygen.
Summary of the invention
Narrow and be unfavorable for the problem of operational management at existing one-step autotrophic nitrogen removal technology dissolved oxygen span of control, the purpose of this invention is to provide a kind of method that realizes one-step autotrophic nitrogen removal under higher levels of dissolved oxygen, the present invention can reach the higher level of 1.8-2.5mg/L at the aeration phase dissolved oxygen concentration.
The object of the present invention is achieved like this: a kind of method that realizes one-step autotrophic nitrogen removal under higher levels of dissolved oxygen, it is characterized in that: waste water enters in the reactor and reacts, added active sludge in the reactor, can realize that under following control condition the dissolved oxygen concentration in the aeration phase reactor is the higher level of 1.8-2.5mg/L, the stage dissolved oxygen concentration that stops exposing to the sun is that the lower level of 0.2-0.5mg/L is realized one-step autotrophic nitrogen removal: the operation scheme of reactor is water inlet 0.5-1.5 hour, reacted 20.5-94.5 hour, precipitate and draining 1.0-2.0 hour, the draining ratio is 0.5, and the influent ammonia nitrogen volumetric loading is 0.04-0.13kgN/ (m
3D), sludge loading is 0.04-0.25kgN/ (kgMLSSd), and wastewater temperature is set to 25-35 ℃ in the reactor, conditioned reaction device water inlet pH value is 7.0-8.5, hydraulic detention time is 48-192 hour, and reactor is carried out intermittent aeration, and aeration time is 1.5-3.0h and exposes to the sun that to stop time ratio be 1: 1.
Further, reactor is the microbial film sequencing batch reactor, adds the wastewater treatment filler in reactor, can be soft combined fiber filler, elastic solid filler or hollow ball floating stuffing etc., and packing volume is than being 20-40%.
The invention has the beneficial effects as follows, widened the dissolved oxygen concentration span of control that realizes one-step autotrophic nitrogen removal technology, reduced the difficulty of one-step autotrophic nitrogen removal system operational management, and made the operation scheme of one-step autotrophic nitrogen removal system more flexible.
Embodiment
Below the present invention is further illustrated.
The invention provides a kind of method that under higher levels of dissolved oxygen, realizes one-step autotrophic nitrogen removal, with high-ammonia nitrogen low C/N ratio wastewater is process object, adopt the microbial film sequencing batch reactor, waste water enters in the reactor and reacts, be provided with soft combined fiber filler, elastic solid filler or hollow ball floating stuffing in the reactor, packing volume is 20-40% than the ratio of reactor useful volume (packing volume with).Under following control condition: the operation scheme of reactor is water inlet 0.5-1.5 hour, reaction 20.5-94.5 hour, precipitation and draining 1.0-2.0 hour, and the draining ratio is 0.5, and the influent ammonia nitrogen volumetric loading is 0.04-0.13kgN/ (m
3D), sludge loading is 0.04-0.25kgN/ (kgMLSSd), wastewater temperature is controlled to be 25-35 ℃ in the reactor, regulating water inlet pH value is 7.0-8.5, hydraulic detention time is 48-192 hour, reactor is carried out intermittent aeration, aeration time is 1.5-3.0h and exposes to the sun that to stop time ratio be 1: 1, this moment, the dissolved oxygen concentration during the Controlling System aeration was that the higher level of 1.8-2.5mg/L, the stage dissolved oxygen concentration that stops exposing to the sun are the lower level of 0.2-0.5mg/L, can realize one-step autotrophic nitrogen removal technology preferably, water outlet ammonia nitrogen transformation efficiency and nitrogen removal rate can reach higher level.
Specific embodiment: with the simulation ammonia nitrogen waste water (NH of artificial preparation
4 +-N concentration is 160mg/L) be research object, adopting useful volume is the microbial film sequencing batch reactor of 30L, and in reactor, add soft combined fiber filler, packing ratio 30%, the reactor operation scheme is water inlet 0.5 hour, reaction 22.5 hours, precipitation and draining 1.0 hours, the draining ratio is 0.5, the influent ammonia nitrogen volumetric loading is 0.08kgN/ (m
3D), sludge loading is 0.06kgN/ (kgMLSSd), in temperature is 30 ℃ ± 2 ℃, the pH value is 7.8～8.2, system's hydraulic detention time is 48h, intermittent aeration and aeration time: stopping the time of exposing to the sun is 2h: 2h, and aeration phase DO is 2.0～2.5mg/L, the stage D O that stops exposing to the sun is under the condition of 0.2-0.4mg/L, and ammonia nitrogen transformation efficiency and nitrogen removal rate in the one-step autotrophic nitrogen removal system reach respectively more than 90% and 80%.
This processing method handle to as if ammonia nitrogen concentration be 40-500mg/L, C/N is than being the high-ammonia nitrogen low C of 0-3/N ratio wastewater, as the animal excrement waste water of percolate, sludge of sewage treatment plants lye and the poultry farming field of refuse landfill etc.
Claims (1)
1. method that under higher levels of dissolved oxygen, realizes one-step autotrophic nitrogen removal, it is characterized in that: waste water enters in the reactor and reacts, added active sludge in the reactor, can realize that under following control condition the dissolved oxygen concentration in the aeration phase reactor is the higher level of 1.8-2.5mg/L, the stage dissolved oxygen concentration that stops exposing to the sun is that the lower level of 0.2-0.5mg/L is realized one-step autotrophic nitrogen removal: the operation scheme of reactor is water inlet 0.5-1.5 hour, reacted 20.5-94.5 hour, precipitate and draining 1.0-2.0 hour, the draining ratio is 0.5, and the influent ammonia nitrogen volumetric loading is 0.04-0.13kgN/ (m
3D), sludge loading is 0.04-0.25kgN/ (kgMLSSd), and wastewater temperature is set to 25-35 ℃ in the reactor, conditioned reaction device water inlet pH value is 7.0-8.5, hydraulic detention time is 48-192 hour, and intermittent aeration, aeration time are 1.5-3.0h and expose to the sun that to stop time ratio be 1: 1; Reactor is the microbial film sequencing batch reactor, adds soft combined fiber filler, elastic solid filler or hollow ball floating stuffing in reactor, and packing volume is than being 20-40%.
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| CN2009101044171A CN101618911B (en) | 2009-07-23 | 2009-07-23 | Method of realizing one-step autotrophic nitrogen removal under higher levels of dissolved oxygen |
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| CN101618911B true CN101618911B (en) | 2011-07-27 |
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| CN103148823B (en) * | 2013-03-14 | 2015-07-15 | 中国科学院重庆绿色智能技术研究院 | Device for measuring thicknesses of aerobic layer and anaerobic layer of biological film and measuring method |
| CN103408140B (en) * | 2013-08-14 | 2014-12-10 | 哈尔滨工业大学 | Control method realizing CANON process high-efficiency stable operation |
| CN115043489B (en) * | 2022-06-07 | 2024-02-27 | 广东轻工职业技术学院 | Method for strengthening single-stage autotrophic denitrification performance |
| CN115403147A (en) * | 2022-09-02 | 2022-11-29 | 四川省绵阳市丰谷酒业有限责任公司 | SBR wastewater treatment method and SBR wastewater treatment device |
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