Sequencing batch active sludge process for eliminating ammonia nitrogen from sewage
An activated sludge method and sequencing batch technology, applied in water/sludge/sewage treatment, chemical instruments and methods, biological water/sewage treatment, etc. problem, to achieve the effect of low overall cost, improved removal rate and low price
Active Publication Date: 2007-06-27
SINOPEC SHANGHAI PETROCHEMICAL CO LTD
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Problems solved by technology
The introduction of nitrifying bacteria from the outside can indeed ensure the smooth progress of the nitrification process in a relatively short period of time, but the operation and management are very inconvenient and the cost is relatively high, and the applicability of this method is not wide, such as for discharge It is not very suitable for large amount of industrial sewage treatment
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment 1～10
[0026] Sewage enters a volume of 50m 3 The reaction pool contains domesticated activated sludge. Inlet flow control is 20m 3 / hr, put the nitrifying bacteria culture accelerator into the reaction tank while entering the water. The nitrifying bacteria culture accelerant is firstly prepared into a diluent with industrial water, and the weight ratio of the nitrifying bacteria nurturing accelerant to water in the diluent is 1: (10-100). Sludge load control is 0.05~0.3kgBOD 5 / kg·MLVSS. The nitrifying bacteria culture accelerator that each embodiment uses is prepared by the required ratio, and wherein molasses is 100 parts by weight, and the proportioning of other components is shown in Table 1, and the dosage of accelerator is shown in Table 2;
[0027] Sewage is nitrified under aerobic conditions. The reaction conditions are: maintain the dissolved oxygen concentration at 2-8mg / l, the temperature at 20-30°C, the pH value at 6-8.5, and the reaction time for 3-6 hours;
[0028...
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The sequencing batch active sludge process for eliminating ammonia nitrogen from sewage includes the following steps: 1. settling sewage to eliminate solid impurity, making sewage enter to reaction pond with active sludge, and throwing nitrobacteria culture promoter comprising molasses 100 weight portions, metal salt 0.2-2.5 weight portions and adsorbent 1-8 weight portions, with the metal salt including component A of MnSO4 or MnCl2, and component B of MgSO4 and / or CaCl2, in the molar ratio of 10 to (0.5-5), the adsorbent being zeolite powder, diatomite, powdered active carbon, fly ash or their mixture, the sludge load being 0.05-0.3 kgBOD5 / kg.MLVSS, and the nitrobacteria culture promoter throwing amount being 5-20 mg / l; 2.aerobic nitrification reaction at dissolved oxygen concentration of 2-8 mg / l for 3-6 hr; 3.anaerobic nitrification reaction for 2-4 hr; and 4.leting sewage standing to settle sludge and exhausting supernatant.
Description
technical field [0001] The invention relates to a method for removing ammonia nitrogen from sewage by adopting a sequencing batch activated sludge method. Background technique [0002] Ammonia nitrogen is the most harmful pollution factor in water bodies. It will lead to eutrophication of rivers and lakes and weaken the self-purification ability of water bodies. Ammonia nitrogen in polluted water usually refers to nitrogen existing in the form of ammonia. Compared with other organic pollutants, it is much more difficult to remove ammonia nitrogen in polluted water. In the prior art, the removal methods of ammonia nitrogen in polluted water mainly include physical, chemical and biological methods. Physical or chemical methods include air stripping method, break point chlorination method, ion exchange adsorption method, flocculation precipitation method, electrodialysis method, catalytic wet oxidation method, liquid membrane method, etc. These methods are generally used for ...
Claims
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IPC IPC(8): C02F3/12C02F101/16
CPCY02W10/10
Inventor 吴敏仓一华祝娟芝杨玉梅
Owner SINOPEC SHANGHAI PETROCHEMICAL CO LTD