Fed-batch shortcut nitrification apparatus and technology thereof
A short-range nitrification and fed-batch technology, applied in chemical instruments and methods, sustainable biological treatment, water/sludge/sewage treatment, etc., can solve problems such as difficult control of physical and chemical factors, weak competitiveness, fluctuations, etc., and achieve improvement The effect of improving the quality of strains, improving stability, and ensuring high efficiency
Active Publication Date: 2009-05-06
ZHEJIANG UNIV
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Problems solved by technology
The reason is mainly that in actual wastewater, ammonia often coexists with organic matter, and the competition ability of nitrous bacteria for dissolved oxygen and nutrients is weaker than that of heterotrophic bacteria, so it is difficult to occupy a dominant position and function; at the same time, the actual wastewater quality There is a certain range of fluctuations, and physical and chemical factors (such as dissolved oxygen, pH, alkalinity) are also difficult to control
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[0018]Example: The first-level seed tank is an airlift nitrification reactor with a volume of 20L, which is composed of organic glass to simulate the inflow of wastewater. The wastewater composition: ammonia nitrogen 500mg / L, sodium bicarbonate 4g / L, and the rest are inorganic nutrients . The operating temperature of the reactor is 30℃, the hydraulic retention time is 4h, the dissolved oxygen is ≥1.5mg / L, and the SS is 6.1mg / L. Through one-year operation, the average ammonia nitrogen removal rate of the reactor is ≥95%, and the nitrous nitrogen accumulation rate is ≥98%. The sludge flow from the primary seed tank to the secondary seed tank is 3g VSS / m 3 ·D. The secondary seed tank has a volume of 2m 3 The airlift nitrification reactor is made of steel plate to simulate the inflow of wastewater. The composition of wastewater is 710mg / L of ammonia nitrogen, 5g / L of sodium carbonate, and the rest are inorganic nutrients. The reactor operates at room temperature, with a hydraulic rete...
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The invention discloses a strain fed-batch short distance nitration device and the technique thereof. The body of the technique comprises a two-stage nitrosomas seeding tank and a short distance nitration reactor. The two-stage nitrosomas seeding tank is operated by using imitation ammoniacal inorganic wastewater and used for producing fast grow nitrosomas group; the short distance nitration reactor is used for treating actual ammoniacal wastewater and increases the nitration function of the short distance with the help of strain fed-batch from the nitrosomas seeding tank. The invention has the advantages that the seeding tank is used for special culturing the fast grow nitrosomas, thus improving the quality of the strain and increasing the nitration potential of the short distance; the predicament that the nitrosomas can not dominate the advantage because of the limitation of water quality is broken away by the stain fed-batch, thus improving the stability of the short distance nitration; and the stain culture and the short distance nitration are separately carried out, thus simplifying the control of the course and the running operation.
Description
Technical field [0001] The invention relates to a flow-added short-range nitrification device and its process. Background technique [0002] Biological denitrification has become the mainstream technology of wastewater denitrification all over the world. The currently popular biological denitrification technologies include nitrification and denitrification process, oxygen-limited autotrophic nitrification and denitrification process (OLAND process), fully autotrophic nitrogen removal process based on nitrite (CANON process), and short-cut nitrification and denitrification process ( SHARON process) and short-cut nitrification anammox process (SHARON-ANAMMOX process), etc. Among them, the short-cut nitrification process (SHARON process) is the basis and necessary link of many new biological nitrogen removal processes, and has broad application prospects. [0003] The basic principle of the short-cut nitrification process is to limit the nitrification process (NH 4 + →NO 2 - →NO 3...
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IPC IPC(8): C02F3/12
CPCY02W10/10
Inventor 郑平陈建伟唐崇俭陈婷婷汪彩华
Owner ZHEJIANG UNIV