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Wastewater treating apparatus

A sewage treatment device and water treatment technology, applied in the direction of biological water/sewage treatment, water/sludge/sewage treatment, aerobic process treatment, etc., can solve the problems of increasing treatment costs, large-scale treatment equipment, etc., and achieve low cost Effect

Inactive Publication Date: 2005-02-23
NET SA
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Problems solved by technology

Therefore, in order to increase the processing capacity, there is a problem that the processing equipment must be enlarged.
In addition, if the advanced treatment of sewage is to be carried out, in addition to the corresponding new equipment, the necessary advanced treatment technology must also be introduced, resulting in a significant increase in treatment costs

Method used

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Embodiment

[0070] As described in specific examples, in figure 1 and figure 2 In the device, the anaerobic tank 4 is used to perform treatment, and the organic compound with a high volume load can be converted into an organic acid. For example, for starch manufacturing process series wastewater, the volume load at BOD is 7.8kg / m 3 · At time d, when the anaerobic tank 4 was used for 5.3 hours, the BOD value decreased to 1340 mg / L. At this point, volatile fatty acids (VFA) reached a level of 857 mg / L, with 46.4% acetic acid, 27.7% propionic acid, 16.0% butyric acid, and 9.9% valerenic acid. Therefore, the aerobic treatment in the post-stage aeration tank 5 is performed very easily and stably.

[0071] so, in figure 1 and figure 2 In the device, it is possible to process organic compounds with high volume load. As a volume load, for example, the anaerobic tank 4 can reach 5-20kg / m 3 d. The aeration tank 5 is 2~8kg / m 3 d. The filter tank 7 is 0.5~1.5kg / m 3 d, and in the previous st...

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Abstract

To improve reaction efficiency in an anaerobic tank in a sewage treatment apparatus equipped with the anaerobic tank and an aeration tank; to carry out the advanced treatment of sewage at a low cost without the necessity of increase in equipment size and introduction of advanced technology. The anaerobic tank 4 and the aeration tank 5 are disposed in this order. A filter bed 16 is installed in the anaerobic tank 4, and has a contact material 17. This contact material 17 has a core material comprising a three-dimensional thick-plate net body, and sludge sticking yarn disposed along the core material.

Description

technical field [0001] The invention relates to a sewage treatment device. Background technique [0002] As a treatment method for organic wastewater, the standard activated sludge method is mainly used, including public sewer sewage. As a sewage treatment device that implements the standard sludge method, for example, an anaerobic tank is installed in the front stage, and an aerobic tank is installed in the rear stage. In the anaerobic tank, the influent wastewater is denitrified by denitrification bacteria Nitrogen, and then in the aerobic tank, under aerobic conditions, the oxidative decomposition of organic compounds and nitrifying bacteria are used to nitrify the activated sludge with ammonia. Then, the denitrification reaction in the anaerobic tank is promoted by returning the nitrifying liquid from the aerobic tank to the anaerobic tank. Patent Document 1 and the like describe such a sewage treatment device. [0003] However, with the conventional anaerobic tank, t...

Claims

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Application Information

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IPC IPC(8): C02F3/08B01D24/30B01D39/04B01D39/08C02F3/10C02F3/30C02F3/34
CPCY02W10/10
Inventor 古川宪治桑原和夫小山登一郎
Owner NET SA
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