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Method for removing sewage aminonitrogen by activated sludge process

A technology of activated sludge method and sewage, which is applied in water/sludge/sewage treatment, chemical instruments and methods, biological water/sewage treatment, etc. problem, to achieve the effect of low price, low overall cost and meeting process requirements

Active Publication Date: 2009-09-23
SINOPEC SHANGHAI PETROCHEMICAL CO LTD
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  • Abstract
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  • Claims
  • Application Information

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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

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  • Method for removing sewage aminonitrogen by activated sludge process

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Embodiment 1～10

[0027] The above-mentioned sewage treated by primary sedimentation enters a volume of 1120m 3 There is domesticated activated sludge in the aeration tank. Inlet flow control is 100m 3 / hr, continuously put the nitrifying bacteria cultivation accelerator into the influent sewage. 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). The nitrifying bacteria cultivation accelerator used in each embodiment was prepared according to the required ratio, wherein molasses was 100 parts by weight, the proportioning of other components was shown in Table 1, and the dosage of the accelerator was shown in Table 2. Sewage is nitrified in the aeration tank under aerobic conditions, and the process conditions are controlled as follows:

[0028] Sludge load 0.1~0.5kgBOD 5 / kg·MLVSS, mud age 5~15d, maintain dissolved oxygen concentratio...

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Abstract

A process for preparing the ammoniacal nitrogen from sewage by active sludge method includes such steps as depositing for removing solid impurities, loading the sewage in aerating pool containing active sludge, adding the nitrobacterium culturing promoter proportionally prepared from molasses, ferrous sulfate or ferrous hydrochloride, and the adsorbent chosen from zeolite powder, diatomite, powdered activated carbon and powdered coal ash, depositing in the first settling pool containing activated sludge, taking supernatant, stirring in a stirring pool containing naturalized active sludge, depositing in the second settling pool, and draining the supernatant.

Description

technical field [0001] The invention relates to a method for removing ammonia nitrogen from sewage through nitrification and denitrification processes by 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...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/12
CPCY02W10/10
Inventor 吴敏仓一华祝娟芝杨玉梅
Owner SINOPEC SHANGHAI PETROCHEMICAL CO LTD