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Nitrating apparatus and waste water processing apparatus with same

A nitrification device and wastewater technology, which is applied in water treatment parameter control, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of increasing the size of the carrier, reducing the efficiency of nitrification treatment, etc., and achieving an enlarged mesh Width, effect of suppressing equipment investment cost and suppressing operating cost

Inactive Publication Date: 2013-01-09
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, when the mesh size of the carrier separation sieve 5 is increased so that the inclusions are not clogged, the size of the carrier has to be increased. Therefore, the efficiency of the nitrification treatment as described above is reduced.

Method used

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  • Nitrating apparatus and waste water processing apparatus with same
  • Nitrating apparatus and waste water processing apparatus with same
  • Nitrating apparatus and waste water processing apparatus with same

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0096] image 3 This is the case where a load adjustment mechanism is provided only in the nitrification tank 16 for carriers.

[0097] be explained, the basic composition and figure 1 same, therefore, only for figure 1 Different configurations will be described.

[0098] Such as image 3 As shown, the load adjustment mechanism is composed of the following devices: a bypass pipe 40 bypassing the nitrification tank 16 for the carrier to bypass the supernatant water to the treated water pipe 38; a supernatant water distributor 42 for distributing the supernatant water to the nitrification tank 16 for the carrier And bypass piping 40; The first concentration meter 44A measures the ammoniacal nitrogen concentration of the supernatant water; the second concentration meter 44B measures the ammoniacal nitrogen concentration of the nitrification water; And the measurement results of the second concentration measuring meters 44A and 44B drive the supernatant water distributor 42 ...

no. 4 approach

[0115] Figure 6 The load adjustment mechanism is not as Figure 3~Figure 5 In the method of adjusting the load by changing the distribution ratio through the waste water distributor 50 or the supernatant water distributor 42 as explained in the above, the sludge / carrier nitrification line 58 with the nitrification tank 16 for the carrier and the nitrification line 58 without the nitrification tank 16 for the carrier are arranged in parallel. Sludge nitrification line 60, and the way of the line is selected according to the water quality of the waste water.

[0116] That is, if Figure 6 As shown, the load adjustment mechanism is provided with a sludge / carrier nitrification circuit 58 composed of a nitrification tank 12 for sludge, a solid-liquid separation tank 14 and a nitrification tank 16 for a carrier, and a nitrification tank 12 for sludge and a solid-liquid separation circuit 58. The tank 14 forms the sludge nitrification line 60 which does not have the nitrification ...

Embodiment

[0134] (Test A)

[0135] Regarding the waste water treatment plant (embodiment) having the nitrification plant of the present invention, the waste water treatment plant (comparative example 1) of the conventional activated sludge circulation reform method and the waste water treatment plant (comparative example 2) of the conventional nitrification promotion type circulation reform method Three installations, comparing residence time (HRT) in the nitrification circuit.

[0136] In comparative test, embodiment and comparative example 1, 2 all are to the waste water of the same water quality that is 40mg / L to the total nitrogen concentration (TN) that is based on ammoniacal nitrogen, comparatively be used to obtain the treatment of average about TN10mg / L HRT required for water.

[0137] *Example using Figure 7 The composition of the waste water treatment plant.

[0138] *Comparative example 1 is solid-liquid separation tank (primary sedimentation tank) → denitrification tank ...

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Abstract

The present invention relates to a nitrating apparatus and a waste water processing apparatus with the same, which fully uses a fixed carrier, is high in nitrating processing efficiency, can greatly inhibit operation cost and equipment investment cost, and can be easily guided into established waste water processing plants without an original sedimentation basin. The nitrating apparatus (10) performs nitrating processing on ammoniacal nitrogen in waste water to form nitrate nitrogen through using nitrifying bacteria under an aerobic codition, and at least is provided with a series of sludge / carrier nitrating circuits (58), the circuits (58) comprise a sludge nitrating groove (12) into which the waste water flows, wherein the ammoniacal nitrogen is nitrated through active sludge (18) containing the nitrifying bacteria; a solid-liquid separating groove (14) separating solid components in the waste water to obtain upper clear water through using the sludge and performing nitrating processing in the nitrating groove (12); a carrier nitrating groove (16) into which the upper clear water flows, wherein the carrier nitrating groove comprises a carrier separating screen fixedly provided with a fixed carrier (30) and a fixed nitrifying bacteria and performs nitrating processing on the ammoniacal nitrogen residual in the upper clear water to finally obtain a nitrating processing water.

Description

technical field [0001] The present invention relates to a nitrification device and a waste water treatment device, and particularly relates to a technique for constructing a nitrification device for obtaining high nitrification treatment efficiency while suppressing running costs and equipment costs. Background technique [0002] As a wastewater treatment device for removing nitrogen from wastewater containing ammoniacal nitrogen (ammonia nitrogen), an activated sludge circulation method (circulation activated sludge method) is known. The activated sludge circulation method is a treatment method using activated sludge. The wastewater is sent to the aerobic nitrification tank through the anaerobic denitrification tank. In the nitrification tank, the nitrifying bacteria in the activated sludge are used to convert ammonia nitrogen Nitrification (oxidation) into nitrate nitrogen. Then, a part of the nitrified nitrified water is returned from the nitrification tank to the denitr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34C02F3/30C02F3/12
CPCY02W10/10C02F3/085C02F3/101C02F3/12C02F2101/38C02F2209/00
Inventor 安部直树高森毅韩敏顾一能大熊那夫纪
Owner HITACHI LTD