A method for quickly and efficiently acclimating short-range nitrification sludge
A short-range nitrification and rapid technology, applied in chemical instruments and methods, water/sludge/sewage treatment, water pollutants, etc., can solve problems such as antibiotic pollution, unfavorable enrichment, and long time
Active Publication Date: 2020-10-27
清林创能(上海)技术有限公司
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Problems solved by technology
But there are the following problems: on the one hand, high temperature increases energy consumption; on the other hand, it takes a long time to domesticate short-range nitrification sludge through a single factor (low dissolved oxygen or high temperature), and the biomass is also low
[0014] Patent CN105692874A starts the semi-short-range nitrification process by adding an antibiotic (roxithin) into the reactor, which will cause antibiotic pollution in the environment
[0015] Patent CN102417238A cultivates short-range nitrification and denitrification granular sludge by regularly adding hydroxylamine (inhibitor). In this method, excessive concentration of hydroxylamine will affect AOB, which is not conducive to enrichment, and increases the process cost.
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[0031] The inner diameter of the SBR is 150mm, the height is 320mm, the effective volume is 5L, and the drainage ratio of the reactor is 75%. Inoculate 4.5L of aerobic activated sludge for treating urban domestic sewage into the reactor, and the sludge concentration is 4500mg / L. The water quality of the control reactor is as follows: the COD concentration of 400-500 mg / L after diluting 100 times the raw liquid of waste incineration leachate (COD 40000-50000 mg / L), the total phosphorus 3-5 mg / L, and the required trace elements. Add ammonium chloride to control the concentration of ammonia nitrogen to 100 mg / L, and add 2.5 to 5.5 g of sodium carbonate to control the pH to 7.0 to 7.5. The aeration rate was controlled to 36L / h, and the average dissolved oxygen concentration in the reactor was measured to be 3.0mg / L. Each cycle is 10 hours, including 10 minutes of water inflow time, 10.5 hours of aeration time, and 20 minutes of sedimentation time. Two cycles per day are maintaine...
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Abstract
A method for acclimating partial nitrification sludge quickly and effectively belongs to the technical field of wastewater biological removal of nitrogen. The method includes: inoculating common flocculent sludge into a sequencing batch reactor, and regulating parameters including ammonia nitrogen loading, the pH (potential of hydrogen) value, dissolved oxygen and the like of inlet water at a room temperature to enable a reaction system to operate in a high-free-ammonia state and a low-dissolved-oxygen state. Compared with a common regulating manner by means of regulating the dissolved oxygen, the temperature and a sludge age, the method for acclimating the partial nitrification sludge quickly and effectively has the advantages that partial nitrification sludge acclimating time is shortened from 10-15 days from 60-120 days, and the method is simple to operate and stable in operation effect.
Description
technical field [0001] The invention belongs to the technical field of sewage biological treatment, and in particular relates to a method for quickly and efficiently acclimating short-range nitrification sludge. Background technique [0002] The phenomenon of water eutrophication caused by excessive ammonia nitrogen is very serious in our country. During the "Twelfth Five-Year Plan" period, my country has incorporated ammonia nitrogen into the total pollutant control system. With the increasingly stringent discharge standards, the removal of nitrogen in water has attracted more and more attention. [0003] At present, the removal of nitrogen in sewage is mainly based on biological denitrification. In view of the shortcomings of traditional biological denitrification processes such as low efficiency, high energy consumption, and large amount of residual sludge, a series of new denitrification processes such as short-cut nitrification and denitrification and anaerobic ammoniu...
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IPC IPC(8): C02F3/12C02F101/16
CPCC02F3/1263C02F2101/16C02F2101/166Y02W10/10
Inventor 孙德智刘新颖党岩舒郅斐
Owner 清林创能(上海)技术有限公司