JP2003326289A - Polluted water treatment apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a polluted water treatment apparatus which is high in cleaning efficiency, does not give rise to secondary pollution, does not require an apparatus for a waste treatment, does not require a wide space for installation and is low in cost. <P>SOLUTION: The apparatus is provided with reaction chambers 14 and 15 for adsorbing effective microorganisms on adsorbent materials and holding the same and a spray water jetting device 18 for spraying and jetting the polluted raw water into the reaction chambers 14 and 15 and passing the water to flow therein. The effective microorganisms are formed or retrieved and specified by the adequateness of the decomposition cleaning effect to the previously collected polluted raw water and the apparatus is provided with a culture tank for culturing the effective microorganisms formed or retrieved and specified separately from a polluted water cleaning line. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a polluted water treatment device.

[0002]

2. Description of the Related Art Conventionally, a method for purifying sewage has, for example, provided an adjusting tank, an aeration tank, a sedimentation tank, etc. in a purification line. In the adjustment tank, a relatively large amount of foreign matter is precipitated and preliminary aeration is performed. At that time, after performing a full-scale aeration, in the settling tank, a coagulant is added to coagulate and settle the floating pollutants, and the coagulated surplus sludge is discharged, for example, After being dried using a dehydrator or the like, it was treated as industrial waste.

[0003]

However, in the conventional purification method as described above, in addition to a low purification rate, a large amount of excess sludge is generated, and dehydration, drying, incineration, and
There has been a problem that the cost required for transactions and the like (industrial waste processing cost) increases and the cost increases. Moreover, a coagulant such as aluminum sulfate or polyacrylamide is often used, which increases operating costs and may cause secondary pollution.

Further, various equipments (industrial waste treatment) for performing dehydration, drying, incineration, etc. are required, and the entire equipment is
There is also a problem that it is large-scale and expensive and requires a large space (site area) for installation.

Therefore, the present invention has a high purification rate, does not cause secondary pollution, does not require a device for industrial waste treatment, does not require a large space for installation, and is low in cost and treats polluted water. The purpose is to provide a device.

[0006]

The polluted water treatment apparatus of the present invention comprises a reaction tank for adsorbing and retaining active microorganisms in a polluted water purification line, and spraying of polluted raw water into the reaction tank. And a sprinkler injection device for flowing through, and the effective microorganisms are created or searched by the suitability of decomposition and purification action on the polluted raw water previously collected, and are specified by
A culture tank for culturing the effective microorganism that has been created or searched and specified is provided separately from the polluted water purification line. Further, the adsorbed material is one or more of quartz trachyte, activated carbon, charcoal, oyster shell, coral sand, ceramics, nylon rope, biotite rhyolite, biotite granite, rhyolite, and granite. It is also preferable that the combination of Further, the above-mentioned effective microorganism is one or two of Pseudomonas, Proteabacteria, Flavobacteria, Corynebacteria, Actinobacteria, Cytoferga, Nocardia, Alkaline Genes, Chromobacteria, Nitrosomonas, Nitrobacter, Zogrea, Bacillus, Acinetobacter. A combination of two or more species is also preferable.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below in detail with reference to the drawings showing an embodiment of the present invention.

FIG. 1 shows a preferred example of the basic construction of an apparatus for carrying out the polluted water treatment method of the present invention.
Is a sand settling tank for taking in polluted raw water and precipitating relatively large foreign matter such as sand, and has a partition plate and a weir inside. Reference numeral 2 is a raw water tank for temporarily storing the polluted raw water introduced from the sand settling tank 1. In addition, 5 is a fine screen incorporating a filter for filtering the contaminated raw water. 3 is an adjusting tank for adjusting pH, temperature, etc. of the contaminated raw water introduced from the raw water tank 2, 4 is a measuring instrument for adjusting pH, temperature, etc., 6 is an aerator. It is connected to the blower 7 with an air pipe.

Reference numerals 8 and 9 are aeration tanks for aerating the adjusted raw water for purification, 10, 11 are pumps arranged at the bottom of the aeration tanks 8 and 12, and 13 are aeration tanks for performing aeration. It is an air pipe. Reference numerals 14 and 15 denote reaction tanks (sprinkling injection reaction tanks) called sprinkling injection filter bed bioreactors arranged directly above the aeration tanks 8 and 9. , Porous biotite rhyolite 16 ... has been deposited and deposited, and a filter bed with many pores at the bottom
17 are laid. On the other hand, above the aeration tanks 8 and 9,
Sprinkler nozzle (sprinkler) 18 connected to pumps 10 and 11
Many are arranged. In addition to the above biotite rhyolite 16, quartz trachyte, activated carbon, charcoal,
Oyster shell, coral sand, ceramics, nylon rope, biotite granite, rhyolite, granite may be used. At this time, two or more kinds may be appropriately combined.

The biotite rhyolite 16 ... Adsorbs and retains effective microorganisms (decomposition effective bacteria) having a suitable purification action on the contaminated raw water to be purified. The effective microorganisms are collected in advance from the polluted raw water to be purified, and those having a suitable purifying action for the polluted raw water are created or searched for, taking into consideration aerobic, anaerobic, etc. ,
Separately, it has been efficiently cultivated and raised in a culture tank or the like, and examples thereof include Pseudomonas, Bacillus, Acinetobacter, Proteabacterium, Flavobacterium, Corynebacterium, Actinobacteria, Cytophaga, Nocardia, Alcaligenes, Chromobacteria, Nitroso. Monas, Nitrobacter, Zogrea, etc.
It should be noted that two or more of these may be appropriately combined.

Therefore, when the raw water sprayed from the spray nozzles 18 ... Flows through the porous rhyolite 16 ... As a bioreactor, the pollutants contained therein are effective microorganisms. After being efficiently decomposed and purified by
It passes through the filter bed 17 and falls into the aeration tanks 8 and 9 arranged immediately below. In the aeration tanks 8 and 9, the air pipe 12,
Aeration is performed by 13 and pollutants are easily decomposed, and pumped up by pumps 10 and 11,
After repeating the spraying and filtration cycles to carry out purification to reach a predetermined purification rate, the raw water flows down to the circulation tank 19 disposed on the downstream side, and further to the sedimentation tank 20.
After the foreign matter is settled at, it is discharged. Note that FIG.
24 is an on-off valve for operating on / off of aeration.

A reflux pump 21 is provided at the bottom of the final settling tank 20, and the raw water tank 2 and the adjusting tank 3 or the aeration tanks 8 and 9 are connected by a reflux line 25 indicated by a chain line. By refluxing, the effective microorganisms contained in the refluxed water can be used again for purification, and wasteful flushing can be prevented. By such a reflux operation, the decomposition efficiency can be constantly kept stable, and the purification rate can be remarkably improved. Further, by operating the three-way switching valve 27, the reflux line 25 shown by the one-dot chain line is connected to the reflux line 26 shown by the two-dot chain line, and undegraded substances and degrading bacteria in the final settling tank 20 are fed to the raw water tank 2 or Further purification can be achieved by refluxing to the adjusting tank 3 and the aeration tank 8.

In the polluted water treatment method using the sprinkling reaction tanks 14 and 15 with such circulation, effective microorganisms (decomposition effective bacteria) having a suitable purifying action for the contaminated raw water are searched (specified) in advance. ) Or producing and performing purification treatment, it is possible to perform purification with high efficiency without waste and to secure a much higher purification rate than in the past.

With the improvement of the purification rate, a large amount of excess sludge that has been generated in the past (due to the low purification rate) is significantly reduced, and an apparatus for industrial waste treatment is not required. Also, when treating excess sludge (dehydration, drying, incineration, trading, etc.), significant cost savings can be achieved. Moreover, since no chemicals are used, there is no secondary pollution, which is a great advantage.
After purification, the introduced effective microorganisms self-decompose and disappear spontaneously without any pollution.

Further, since the structure of the device is simple, it is inexpensive, small-scale, and does not require a large space for installation, so that the cost can be greatly reduced as compared with the conventional device. Moreover, the purification capacity of the existing device can be easily improved. For that purpose, for example, it is sufficient to carry out a search in advance and carry a specific cultured effective microorganism on an appropriate carrier (porous adsorbing substance etc.) and put it in the aeration tank (reaction tank) of the existing device. The purification capacity can be strengthened at a low cost (substantially increased) without increasing the equipment.

On the other hand, when the method of the present invention is applied to a relatively large-scale purification plant, as a reaction tank for causing active microorganisms to actively decompose, for example,
If a sprinkling jet type water tank is used and the carrier (porous adsorbing substance, etc.) is loaded with the effective microorganisms in the water tank so that the decomposition treatment is carried out, the decomposition activity of the effective microorganisms can be dynamically increased. It is possible to secure high purification ability.

In short, the method for treating polluted water according to the present invention, for example, as shown in the flow chart of FIG. 2, collects polluted raw water in advance (S1), and selects effective microorganisms having a suitable purification action for the polluted raw water. Search (specific) or create (S
2) Cultivate and grow the effective microorganisms (aerobically and anaerobically) (S3), put them into a reaction tank as a bioreactor (S4), and adsorb and retain them on an appropriate carrier (S3).
5), the polluted raw water is purified in the reaction tank (S
6), regardless of the details of the configuration of the device.

With respect to the apparatus, for example, it is preferable that the reaction tank is accompanied by circulation, but it may be one not accompanied by circulation, or may be stacked in multiple stages, and a large number of them are connected and developed in a plane. Or, these may be appropriately combined, and the configuration thereof may be appropriately improved according to the use conditions, the ambient conditions, and the like.

Next, examples of the present invention will be described. (Example 1) When wastewater (raw water) discharged from a food factory was purified by a polluted water treatment device using Pseudomonas as an effective microorganism, the results (purification record data) shown in Table 1 were obtained.

[0020]

[Table 1]

From Table 1, in particular, a large amount of SS (suspended matter) contained in the raw water was drastically reduced, and the purification rate was 99.8%.
Met. In Table 1, BOD is biochemical oxygen demand, COD is chemical oxygen demand, and n-Hex is normal hexane.

(Example 2) When wastewater (raw water) discharged from a food (kamaboko) factory was purified by a polluted water treatment device using Bacillus as an effective microorganism, the results shown in Table 2 were obtained. .

[0023]

[Table 2]

From Table 2, B contained in a large amount in raw water
Most of the OD is purified, and the purification rate is 99.9.
%Met.

(Example 3) When wastewater (raw water) discharged from an oil refinery was purified by a polluted water treatment device using Acinetobacter as an effective microorganism, the results shown in Table 3 were obtained.

[0026]

[Table 3]

From Table 3, n contained in a large amount in raw water
Most of Hex is purified, and its purification rate is
It was 99.9%.

[0028]

According to the inventions of claims 1 to 3, effective microorganisms having a suitable purifying action on the contaminated raw water to be purified are searched (specified) or prepared in advance, and the effective microorganisms are identified. Since it is used after culturing, it is possible to carry out purification without waste and with much higher efficiency than before.
A high purification rate can be secured.

Due to the improvement of the purification rate, a large amount of excess sludge that has been conventionally generated (due to the low purification rate) is significantly reduced. Therefore, a device for industrial waste treatment becomes unnecessary. Also, when treating excess sludge (dehydration, drying, incineration, trading, etc.), significant cost savings can be achieved.

Since no chemicals are used, there is no secondary pollution, which is a great advantage. After purification, the introduced effective microorganisms self-decompose and disappear spontaneously without any pollution.

Since the structure of the device is simplified, the device is inexpensive and small in size, and does not require a large space for installation. Therefore, it is possible to significantly reduce the cost as compared with the conventional device. .

In addition, in order to improve the purification capacity of the existing equipment, for example, a specific effective microorganism that has been previously searched and cultivated is supported on an appropriate adsorbent, and the aeration tank (reaction tank) of the existing equipment is supported. ), Etc., the purification capacity can be easily enhanced (substantially increased) without increasing the equipment.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of a polluted water treatment device of the present invention.

FIG. 2 is a flowchart showing an embodiment of the polluted water treatment method of the present invention.

[Explanation of symbols]

14 Reaction tank 15 reaction tank 16 Adsorbed substance 18 Sprinkler (sprinkling nozzle)

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 4B065 AA01X AA04X AA12X AA15X                       AA24X AA41X BD22 BD23                       CA54                 4D003 AA01 AB12 DA03 DA15 DA30                       EA01 EA14 EA17 EA23 EA24                       EA25 EA30                 4D040 DD03 DD24

Claims (3)

[Claims] 1. A polluted water purification line, a reaction tank for adsorbing and retaining effective microorganisms on an adsorbent, and a spraying device for spraying and flowing contaminated raw water into the reaction tank.
The effective microorganisms are created or searched by the suitability of decomposition and purification action for the polluted raw water previously collected, and the culture tank for culturing the effective microorganisms created or searched is used for the contamination. A polluted water treatment device, which is provided separately from the water purification line. 2. The adsorbent material is quartz trachyte, activated carbon,
Charcoal, oyster shell, coral sand, ceramics, nylon rope,
The polluted water treatment device according to claim 1, which is one or a combination of two or more of biotite rhyolite, biotite granite, rhyolite, and granite. 3. The effective microorganism is selected from Pseudomonas, Proteabacterium, Flavobacterium, Corynebacterium, Actinobacteria, Cytoferga, Nocardia, Alcaligenes, Chromobacteria, Nitrosomonas, Nitrobacter, Zogrea, Bacillus, Acinetobacter. The polluted water treatment device according to claim 1 or 2, which is one kind or a combination of two or more kinds.