JP2002191911A - Water treatment method for muddy waste water, washing water, drilling water or the like - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive water treatment method for muddy waste water such as drilling water of a high pressure jet stirring process or the like, water mud slime, plant washing water, washing water of aerated mixed lightweight earthwork or the like. SOLUTION: Muddy waste water(MW) is put in a bag body (1) having filterability to be filtered and filtered water(FW) is reutilized and, in such a case that residual matter (RC1) is solidified, it is diverted to a banking material and, in the case of non-solidified residual matter, bag bodies housing the residual matter are stacked to further forcibly filter the residual matter by the compactification due to the own weight of the residual matter to reduce the volume of the residual matter. As a result, transport/disposal cost becomes low and inexpensive water treatment friendly to environment is performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a muddy water and mud containing hydraulically hardened material such as cement which is mainly generated in connection with cement-based ground improvement work and construction such as light-weight earthwork with mixed air bubbles. Drilling without self-hardening mixed with solids
The present invention relates to a method for treating water such as washing water.

[0002]

2. Description of the Related Art Wastewater in a high-pressure jet stirring method and cleaning water in a plant or the like in a bubble-mixed lightweight earth method contain a large amount of cement and have a high alkalinity, so that they are treated as industrial waste. I have.

When the amount of self-hardening wastewater discharged from a construction site or the like is small, a pit is dug near the plant, and the wastewater flows directly into the pit to allow water to penetrate into the ground, and The remaining residue is solidified by the cement and then excavated from the pit and disposed.

[0004] Further, in the case of wastewater having no self-hardening property, it is sucked and transported as it is by a vacuum truck or the like and treated as industrial waste, or a pit is dug near a plant and directly discharged there. And the water is allowed to penetrate into the ground, and the remaining solids in the pits are excavated and transported as industrial waste.

[0005]

According to the above-mentioned conventional processing method, when processing as industrial waste, suction and
Costs for transporting vacuum cars and disposal costs as industrial waste are incurred, which is a significant economic burden in construction costs, and is not desirable in terms of environmental impact. . Also, a method of digging a pit near the plant and pouring the muddy water into the pit is not preferable from the viewpoint of environmental impact.

[0006]

SUMMARY OF THE INVENTION The present invention has solved the above-mentioned problems of the conventional water treatment method. That is, in the invention of claim 1, in the treatment of muddy water into which a hardening material having hydraulic property such as cement is mixed, the upper part of a filterable bag having a closed bottom is opened and suspended in a water storage tank. The muddy water that has been sent downward is installed and flows into the bag through its opening, and moisture is filtered from the peripheral wall of the bag.

[0007] The filtered water that has been filtered out of the bag and stored in the water storage tank is drained out of the water storage tank by a drainage means such as a submersible pump, and the filtered water discharged out of the water storage tank is sent to the construction water tank. The filtered water is reused as kneading water or drilling water.

On the other hand, after the moisture is filtered from the bag and the cement-based residue remaining in the bag is solidified, the waste in the bag is crushed and reused as embankment material, etc. Water treatment method such as water and drilling water.

According to a second aspect of the present invention, there is provided a method for treating wastewater having no hydraulicity, such as drilling water and washing water mixed with sludge and solid matter, wherein the bottom is closed and the top is opened to discharge the wastewater. Filterable bag formed at the opening of the bag, suspended in a water storage tank with the top opening of the bag opened,
Muddy water mixed with non-hydraulic mud and solids, such as drilling water and washing water, is fed into the bag from the opening, filtered out of the bag and accumulated in the reservoir. The filtered water is drained out of the water storage tank by a drainage means such as a submersible pump, and the filtered water drained out of the water storage tank is sent to a construction water tank, and the filtered water is reused as kneading water or drilling water. And, after closing the opening of the bag with a string or the like, the bags are stacked and the compact is drained forcibly by the weight of the bag while leaving the residue in the bag to reduce the volume of the residue in the bag. After drastically reducing the amount of waste, waste water is discharged and disposed of to treat industrial waste such as sludge, washing water, and drilling water. Also,
According to a third aspect of the present invention, the bag used in the first or second aspect of the present invention is a filterable flexible container bag.

According to the present invention, as described above, the bottom of an empty bag of a solidifying material carrying bag such as a filterable flexible container bag is closed, and the bag is suspended and installed in a water storage tank with an upper opening opened. Put the muddy water in the empty bag, use the filterability of the empty bag to separate the muddy water into residuals mixed with moisture and cement, solidify the residuals with cement, and excavate this Disintegrate using a machine, etc., and divert to embankment material if necessary.

The filtered water is reused as kneading water and washing water for a slurry or the like.
H treatment and disposal.

In addition, this method of treating muddy water can be used even if cement is not mixed in the muddy water (for example, drilling water,
In such cases, water and residues can be separated by filtration.
The water is reused for kneading water, washing water, etc., and the residual content in the bag is reduced in moisture content due to the filtering action of the flexible container bag, and the bag is closed after closing the opening of the bag with a string or the like. Since the bodies are stacked, the volume of the muddy water is reduced by its own weight even if it cannot be reused, so that the transportation and processing costs for transporting dump trucks and the like can be greatly reduced.

A filterable bag is placed in a water tank with its bottom closed and its top opening open, and muddy water is poured into the empty bag. As time passes, the muddy water is filtered and dehydrated, only the water is stored in the water tank, the solid residue is left in the bag, and the water stored in the water tank is sent to the water tank used for construction by a submersible pump or the like. Reuse.

If the solid residue contains cement or the like and is self-hardening, it is crushed by an excavator or the like after being solidified.
Divert to embankment. If it does not have self-hardening properties, it is possible to consolidate dewatering by stacking bags, etc. In addition, since bags with solid residues use flexible container bags, they can be easily loaded on dump trucks, etc. Can be treated as waste.

[0015]

FIG. 1 is a conceptual diagram of a water treatment method according to the present invention, and FIG. 2 is a forced drainage method using a dead weight of a non-hydraulic filtration residue by its own weight. FIG. In the construction of the lightweight foam mixed earth method, as shown in FIG. 1, the bottom 1b of the bag 1 made of a filterable flexible container bag (1t bag) is closed,
With the upper opening 1a open, 3 to 5 m ³ water tank 2
The hanging cord 1c of the bag 1 is hooked and fixed to the edge 2a of the bag 1 so that the discharge port of the wastewater flow pipe 3 is connected to the opening 1 of the bag 1.
The wastewater MW mixed with cement from the plant is caused to flow in through a pump (not shown) in such a manner as to face a.

As time elapses, the water in the muddy water MW is filtered out from the bag 1 and leaches out, so that an appropriate amount of water is stored in the water tank 2 and then pumped up by the submersible pump P previously installed in the water tank 2. Drain through drain pipe 4 and filter water FW
Is supplied to a construction water tank (not shown), and the filtered water FW can be reused as kneading water.

The residual material RC remaining in the bag 1 of the flexible container bag has been solidified by the action of cement approximately 1 to 2 days later, so the bag 1 is taken out together with the excavator and then crushed into an embankment. Divert.

FIG. 2 is a conceptual diagram of a method of forcibly draining wastewater having no hydraulicity such as drilling water or washing water mixed with sludge and solid matter, wherein hydraulic cement is mixed into the wastewater. Unperforated drilling water or washing water in the chemical solution injection method is separated by filtration into filtered water FW and residue RC2 in the same manner as the above-mentioned treatment method, and the filtered water FW is reused for kneading water and washing water. On the other hand, the residual material RC2 having no hydraulic property is put into the bag 1
The bag 1 closed and closed with the opening 1a of the bag 1 left inside
Are sequentially stacked in the water tank 2 from which the filtered water FW has been discharged, the forced consolidation dewatering is performed by the weight of the residue RC2, the water content of the residue RC2 in the bag body 1 is reduced by a water filtering action, After the volume of the residue RC2 is significantly reduced, the residue RC2 is loaded and carried to a dump truck or the like for disposal.

[0019]

According to the present invention, by using such a wastewater treatment method, the wastewater can be effectively used as much as possible, and even when the treatment is required, the treatment amount can be greatly reduced. In addition, good processing can be easily performed in terms of environmental impact. In addition, since the water content of non-self-hardening wastewater is reduced by filtration, even if it cannot be reused for embankment etc., the volume of the wastewater is reduced and it is easy to transport it. Transportation costs and processing costs can be significantly reduced.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram of a water treatment method of the present invention.

FIG. 2 is a conceptual diagram of a forced drainage method by the weight of filtration residue having no hydraulic property.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bag 1a Opening 1a Bottom 1c Hanging string 2 Reservoir 2a Top edge 3 Drainage water inflow pipe 4 Filtration water discharge pipe P Submersible pump MW Drainage FW Filtration water RC1 Hydraulic residue RC2 Non-hydraulic residue

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takeshi Nakao 2-174 Yanagibashi, Taito-ku, Tokyo Inside Onoda Chemiko Co., Ltd. (72) Inventor Fumihiko Kimura 2-17-4 Yanagibashi, Taito-ku, Tokyo Chemiko Onoda Co., Ltd. F-term (reference) 4D041 AA04 AA06 AB05 AD01 CB07 CC01 CC04 4D064 AA05 AA19 BC06 BC21 BC26 BK03

Claims (3)

[Claims] In the treatment of muddy water mixed with a hardening material having hydraulic property such as cement, a filterable bag formed at an opening for introducing muddy water by closing a bottom surface and opening an upper surface. Hanging installation in a water storage tank with the upper opening of the bag opened, the discharged mud water fed into the bag from the opening, filtered water that has been filtered and stored outside the bag,
Water is drained out of the water tank by a drainage means such as a submersible pump, and the filtered water drained out of the water tank is sent to the construction water tank, reused as kneading water or drilling water, and the residual matter in the bag body is removed. A method for treating wastewater, washing water, drilling water, etc., characterized by solidifying, crushing and reusing it as embankment material. 2. In the treatment of non-hydraulic wastewater such as drilling water and washing water mixed with sludge and solids, the bottom is closed and the top is opened to form an opening for the introduction of wastewater. Filterable bag, suspended and installed in a water storage tank with the top opening of the bag open, drilling water that has been sent,
Muddy water, which is mixed with mud and solid matter having no hydraulicity such as washing water, is charged into the bag through the opening, and filtered water that has been filtered and stored outside the bag is drained by a submersible pump or the like. Drained to the outside of the water tank, the filtered water drained out of the water tank is sent to the construction water tank, reused as kneading water or drilling water, and the residual matter in the bag body is stacked with the bag by its own weight. After forcibly consolidating drainage and greatly reducing the volume,
Sludge, washing water, characterized by carrying out disposal of residuals
Water treatment method for industrial waste such as drilling water. 3. A bag according to claim 1, wherein said bag is a flexible container bag.
Water treatment method for industrial waste such as drilling water.