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water treatment system

A technology of water treatment system and water treatment device, which is applied in biological water/sewage treatment, water/sludge/sewage treatment, sustainable biological treatment, etc. It can solve the operation and maintenance business and consumables such as the small number of installations and the generation of proofreading. fees, etc.

Active Publication Date: 2021-07-13
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The number of ammonia meters installed in the sewage treatment plant is also small, and there are many occasions where new purchases are required, and new operation and maintenance services such as proofreading and consumables are incurred.

Method used

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Examples

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Embodiment 1

[0032] figure 1 A schematic overall configuration diagram of the water treatment system of Example 1 according to an example of the present invention is shown in . figure 1 In , solid lines indicate piping, and broken lines indicate signal lines. The water treatment system 1 according to this embodiment includes: a water treatment device 2 that removes organic matter and ammoniacal nitrogen by using activated sludge such as domestic wastewater or industrial wastewater (water to be treated) by a general-purpose activated sludge method, and an air volume control unit. 3.

[0033] (water treatment device)

[0034] Such as figure 1 As shown, the water treatment device 2 has: starting from the inflow side of the sewage as the water to be treated, a sequence 1 consisting of an aerobic tank (reaction tank) 4-1 and a final sedimentation tank 5-1 in order; Sequence 2 consisting of aerobic tank (reaction tank) 4-2 and final sedimentation tank 5-2 starts from the inflow side of sewag...

Embodiment 2

[0123] Figure 6 A schematic overall configuration diagram of a water treatment system according to Example 2 according to another example of the present invention is shown in FIG. Figure 7 shown in Figure 6 The functional block diagram of the air volume control unit shown. In the water treatment system of the present embodiment, there is an air volume meter 13-2 provided in the serial 2 diffuser piping 18-2 constituting the water treatment device 2, and the air volume control unit 3a includes a first target air volume calculation unit 31a and a first target air volume calculation unit 31a and The point that the second target calculation unit 31b replaces the target air volume calculation unit 31 and the DO concentration target value calculation unit 32 in the first embodiment is different from the first embodiment. The same reference numerals are assigned to the same constituent elements as those in Example 1, and descriptions that overlap with those in Example 1 will be ...

Embodiment 3

[0179] Figure 11 shows the processing flow chart of the second target air volume calculation unit constituting the air volume control unit of Embodiment 3 according to other embodiments of the present invention, Figure 12 A flow chart of the process of the air volume valve opening calculation unit constituting the air volume control unit of the third embodiment is shown in . In addition, the configuration of the water treatment device according to this embodiment is the same as that shown in the above-mentioned embodiment 2. Figure 6 The composition is the same. In addition, the configuration of the air volume control unit of this embodiment is the same as that shown in the above-mentioned embodiment 2. Figure 7 The functional block diagrams are the same. In the present embodiment, in addition to the corrected target air volume for sequence 2 shown in embodiment 2, it is configured based on the target air volume for sequence 1 shown in embodiment 1 or 2. For the target...

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Abstract

The water treatment system (1) of the present invention is provided with a water treatment device (2) and an air volume control unit (3), and the water treatment device (2) has a plurality of sequences having reaction tanks (4) including aerobic tanks ‑1, 4‑2) and diffusers (6‑1, 6‑2), the water treatment device (2) has: DO meters (12‑1, 12‑2) in all settings in multiple sequences, Flow meters (11-1, 11-2) for measuring the flow rate of treated water flowing into each series, water quality meters (10) installed in a series of aerobic tanks (4-1), and blowers (7) , the air volume control unit controls the air volume for each sequence. The air volume control part (3) controls the air volume to a sequence based on the measured value of the water quality meter (10), and, based on the DO concentration measured value, the inflow flow rate of the treated water in at least one of the sequence and other sequences, Air flow to other sequences is controlled.

Description

technical field [0001] The present invention relates to a water treatment system including a water treatment device using activated sludge and controlling the water treatment device. Background technique [0002] In water treatment facilities (water treatment equipment) such as sewage treatment plants, various water treatment processes are introduced to remove environmental pollutants. The general-purpose activated sludge method, which is a general treatment method, mainly targets the removal of organic matter. In recent years, in order to further reduce the environmental load, the spread of advanced treatment for the purpose of removing nitrogen (especially ammoniacal nitrogen) and phosphorus has been promoted. [0003] Mainly remove organic matter, ammoniacal nitrogen (NH 4 -N) and phosphorus. For example, for ammoniacal nitrogen, by using nitrifying bacteria in an aerobic state to nitrate nitrogen (NO 3 -N) oxidation reaction (nitration) to remove. Therefore, in sewa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/12
CPCC02F3/12Y02W10/10
Inventor 西田佳记山野井一郎武本刚中村信幸
Owner HITACHI LTD
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