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
2 Cites 4 Cited by

AI-Extracted Technical Summary

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 c...
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Method used

As described with specific embodiment, in the device of Fig. 1 and Fig. 2, utilize anaerobic tank 4 to implement processing, can convert the organic compound of high volume load into organic acid. For example, for starch production process series wastewater, when the volume load of BOD is 7.8kg/m3·d, when the anaerobic tank 4 is used for 5.3 hours, the BOD value is reduced to 1340mg/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.
As mentioned above, in anaerobic tank 4, by separately using pad-shaped contact material 17 and shaking bed type contact material 28, except that above-mentioned contact material can be prevented from clogging, the organic acid of organic compound can also be effectively carried out. Transformation and denitrification treatment, etc.
In addition, because in anaerobic tank 4 and filter tank 7, only filter bed 16 is set in the inside of tank 15,39, and, in aeration tank 5, only contact material 28 is set in the inside of tank 27, Very high-efficiency biological treatment can be performed only with a simple configuration without enlarging the equipment, so extremely low-cost treatment can be realized. In addition, by simply modifying the existing equipment by simply assembling the filter bed 16 and the contact material 28, it is possible to perform high-efficiency treatment that greatly improves the treatment capacity without constructing new equipment.
The aeration tank 5 with shaking bed type contact material 28 is to be processed under aerobic conditions, and simultaneously by the air bubbles in the supply water from the aeration device 29 to generate water flow, by increasing the flow velocity of the treated water around the contact material 28 , causing the flocculent silk 34 to shake, by the shaking, as shown in Figure 7, the excess part of the sludge 45 attached to the contact material 28 is peeled off, so it has the function of preventing clogging caused by excessively attached sludge 45, and improving the treatment process. The advantage of ...
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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.

Application Domain

Treatment using aerobic processesTreatment with aerobic and anaerobic processes +3

Technology Topic

YarnSewage +5

Image

  • Wastewater treating apparatus
  • Wastewater treating apparatus
  • Wastewater treating apparatus

Examples

  • Experimental program(1)

Example Embodiment

[0069] Example
[0070] As illustrated by specific examples, in figure 1 and figure 2 In the device, the anaerobic tank 4 is used for processing, which can convert organic compounds with a high volume load into organic acids. For example, for the starch manufacturing process series wastewater, the volume load in BOD is 7.8kg/m 3 · At d, when the anaerobic tank 4 is used for 5.3 hours, the BOD value is reduced to 1340mg/L. At this time, the volatile fatty acid (VFA) reached a level of 857mg/L, of which acetic acid was 46.4%, propionic acid was 27.7%, butyric acid was 16.0%, and valeric acid was 9.9%. Therefore, the aerobic treatment in the rear-stage aeration tank 5 is performed very easily and stably.
[0071] So in figure 1 and figure 2 The device can handle organic compounds with a high volume load. As a volume load, for example, the anaerobic tank 4 can reach 5-20 kg/m 3 ·D. Aeration tank 5 is 2~8kg/m 3 ·D. Filter tank 7 is 0.5~1.5kg/m 3 ·D, as in the previous standard activated sludge method, generally about 0.8kg/m 3 ·Compared with the unstable volume load treatment of d, a significant improvement effect can be achieved.
[0072] An example of the water quality measurement of the treated water when the device of the present invention is operated is shown in Table 1. Table 1 shows the water quality of the raw water, the operating conditions of the anaerobic tank 4 and the aeration tank 5, and the treatment with the anaerobic tank 4 and the aeration tank 5. The quality of the water. As shown in Table 1, even when the BOD volume load is high, BOD and COD can be removed efficiently. Therefore, even if omitted figure 1 and figure 2 The illustrated sedimentation tank 6 and filter tank 7 can also be treated to the extent that they can be used as sewage.
[0073] Raw water
[0074] () Indicates the removal rate (%).
[0075] Table 2 shows other measurement examples of the water quality of the treated water when the device of the present invention is operated. Table 2 shows the result of treatment using a high-density contact material in which the number of flocculent filaments 34 per unit length of the core material 33 is larger than usual as the contact material 28 of the aeration tank 5. At this time, as a nitrogen removal rate, a high efficiency of 52.9% can be obtained. It can be judged that this is because the contact material 28 is used as the above-mentioned high-density contact material and the anaerobic layer is formed inside the contact material 28. In addition, such as figure 2 As shown, BOD and COD can also be removed efficiently at this time.
[0076] Raw water
[0077] () Indicates the removal rate (%).
[0078] BOD volume load 1.4(kg/m 3 ·D)
[0079] HRT 8.8(hr)

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