JPH0235901A - Drain treating agent, drain treating process and its device - Google Patents

Abstract

PURPOSE:To control sludge volume to be generated, and adsorb, flocculate and remove oil content by using a flossy material formed by the reaction of a cationic polyamine high molecular flocculating agent with an anionic polyacrylamide high molecular flocculating agent as a treating agent. CONSTITUTION:A floss silk-like material is formed by reacting a cationic polyamine high molecular flocculating agent with an anionic polyacrylamide high molecular flocculating agent. Said flossy material is formed in the drain such as car wah station drain or the like to adsorb and flocculate oil content which is further sedimented and separated to remove the oil content. Regenerated water of good quality can be prepared at low cost and sludge volume to be generated is controlled by treating the drain by means of said process.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a wastewater treatment agent, a wastewater treatment method, and an apparatus for treating and recycling wastewater from, for example, a car wash.

[Background of the invention]

BACKGROUND ART Conventionally, wastewater regeneration techniques using adsorbents such as activated carbon or wastewater regeneration techniques using special clay and polymer flocculants have been proposed. The former of these wastewater reclamation technologies does not have the problem of sludge treatment, but the life of the adsorbent is short;
Reproduction costs are high. For example, if activated carbon is used at 52Ktr to regenerate wastewater from a car wash at approximately 100C, the quality of the water after regeneration is 14.81/1. SS is 22mH
/l, the visibility is only about 10.2cm, the quality of the recycled water is not extremely good, and the recycling cost is about 2.5cm, including the cost of activated carbon only.
It is expensive at around 300 yen/end. Furthermore, the latter of the above wastewater treatment techniques has problems such as high post-treatment costs such as sludge dewatering and high recycling costs. For example, if we use 1.5 tons of special viscosity to regenerate approximately Loom's wastewater from a car wash, the quality of the water after regeneration is 3 g/1.5 g of n-hexane. SS is 10mg/
Although the quality of recycled water is better than that of the activated carbon treatment method with a visibility of 50 cm, the amount of sludge generated is 3.
00011. /m', which has the major drawback that sludge treatment is troublesome, and moreover, the treatment cost is l-
is expensive, about 250 yen/mff.

[Disclosure of the invention]

A first object of the present invention is to provide a wastewater treatment agent, a wastewater treatment method, and a wastewater treatment device that are low in wastewater regeneration treatment costs, particularly in running costs. A second object of the present invention is to provide a wastewater treatment agent, a wastewater treatment method, and a wastewater treatment device that generate less sludge than, for example, a wastewater treatment method using clay. The present invention has been made to achieve the above objects,
The object of the present invention is to provide a wastewater treatment agent made of cotton-like material produced by a reaction between a cationic polyamine-based polymer flocculant and an anionic polyacrylamide-based polymer flocculant. In addition, in the above wastewater treatment agent, the amount of cationic polyamine-based polymer flocculant used is 2 to 1 m3 of treated wastewater.
0g or more, more preferably about 60g or more, still more preferably about 120g or more, and the amount of anionic polyacrylamide polymer flocculant used is 1? 4F1 or more, more preferably 20. Above, more preferably 40. The above is preferable, that is, by using a predetermined amount or more of these polymer flocculants, cotton-like sludge that adsorbs and aggregates oil and the like is produced. Examples of such cationic polyamine-based polymer flocculants include Himoroku QIOI (molecular weight 30,000, manufactured by Wakidachi Organic Industrial Research Institute), Himorok Q202 (molecular weight 30,000, manufactured by Wakidachi Organic Industrial Research Institute, Ltd.), ) or Himoroku Q301 (molecular weight 80,000, manufactured by Wakidate Organic Industrial Research Institute Co., Ltd.), etc. As an anionic polyacrylamide polymer flocculant, for example, Himorok SS-"5
00 (molecular weight 1200, manufactured by Wakidachi Organic Industrial Research Institute Co., Ltd.)
, Himoroku 5S-140 (molecular weight 1200, Co., Ltd.)
1! (manufactured by Ritsumeikan Industrial Research Institute), Himoroku 5S100 (
Molecule 11200, manufactured by Wakidate Organic Industrial Research Institute Co., Ltd.), Konan Flock LTX-40, LTX-70 (Konan Chemical Industry Co., Ltd. WJ) or Cliff Rock P^ (Passenger Industrial Co., Ltd.)
Co., Ltd.) etc. Among them, Himorok Q101 and Himorok 5S-
A combination with 500 is most desirable. Further, in the above-mentioned wastewater treatment agent, an inorganic flocculant such as ferric chloride, iron sulfate, polyferric sulfate, aluminum chloride or bentonite is further used,
In particular, it is preferable that the amount of inorganic coagulant used is 1 g or more, more preferably 20 g or more, and even more desirably 40 g or more per 11' of treated wastewater, that is, an inorganic coagulant such as ferric chloride is used in combination. Then, even if the amount of expensive polymer flocculants used is reduced, fluff-like sludge will be generated due to the reaction of these polymer flocculants, so it is desirable to use an inorganic flocculant from a cost standpoint. Among inorganic flocculants, it is most desirable to use ferric chloride, which decomposes the base wax, etc. When using ferric chloride, the addition of ferric chloride reduces pl+ to 6 or less. In such a case, it is desirable to add sodium hydroxide or the like to neutralize it to about p116-6.5. In addition, the present invention adsorbs oil to the cotton-like material produced by adding a cationic polyamine-based polymer flocculant and an anionic polyacrylamide-based polymer flocculant to wastewater. The present invention also provides a wastewater treatment method for removing oil separated and settled by coagulation. In addition, in this wastewater treatment method, if an inorganic flocculant is added before the polyamine-based polymer flocculant and polyacrylamide-based polymer flocculant are added, the amount of these expensive polymer flocculants used can be reduced. Desirable because it can be done. The present invention also provides a mixer chamber, a reaction tank, a settling tank, a filtration means, a first flocculant tank, a second flocculant tank, and a first flocculant from the first flocculant tank. a first supply means for supplying an agent to the mixer chamber; and a second supply means for supplying a second flocculant from the second flocculant tank to the reaction tank.
The present invention also provides a wastewater treatment device having a supply means. In addition, in this wastewater treatment apparatus, a separation tank for wastewater pretreatment, a third flocculant tank, and a third supply supplying the third flocculant from this third flocculant/tank to the separation tank. It is even more desirable to further provide means.

【Example】

The drawing is a schematic diagram of one embodiment of a wastewater treatment apparatus in which the wastewater treatment method according to the present invention is implemented. In the figure, 1 is a ferric chloride tank filled with an aqueous solution of ferric chloride, 2 is a polyamine-based polymer flocculant tank filled with an aqueous solution of a cationic polyamine-based polymer flocculant, 3a and 3b are polyacrylamide polymer flocculant tanks filled with an aqueous solution of an anionic polyacrylamide polymer flocculant. Note that the ferric chloride tank 1 and the polyamine polymer flocculant tank 2 each have only one tank, whereas the polyacrylamide polymer flocculant tanks 3a and 3b are arranged in multiple tanks. This is because the solubility of the anionic polyacrylamide polymer flocculant is not so good, so one is used for dissolution preparation and the other is used alternately. Reference numeral 4 denotes a tank in which wastewater (white emulsion water containing a large amount of detergent, wax, oil, etc.) from, for example, an automobile car wash is stored. 5 is a separation tank for pre-treating the wastewater, and this separation tank 5 is provided with 51L of Sunroid Mat 0N-150 (nylon filter manufactured by Toyo Action Co., Ltd.) in the upper layer. A sloped pipe (Alpatsukin AP-8 manufactured by Tsutsunaka Plastic Industry Co., Ltd.) in the lower layer,
A sedimentation promoting member) 5b is provided, and an eye iron plate 5c is provided below this inclined tube 5b. 6a is a pump, and 6b is a pipe, which are configured to supply waste water from the tank 4 to the upper part of the filter 58 of the separation tank 5 via the vibro b by the force of the pump 61L. In addition, 7 is a liquid level gauge for starting and stopping the pump 6a. 8 is a line mixer room, 9 is a reaction tank, 10 is a precipitation tank connected to the reaction tank 9, and 11 is a filtration tank connected to the precipitation tank 10. 12a is a pump, 12b is a pipe, and pump IZa
The structure is such that the ferric chloride aqueous solution in the ferric chloride tank 1 is supplied into the separation tank 5 via the pipe 12b by this force. 13m is a pump, 13b is a pipe, and pump 13a
In other words, the cationic polyamine-based polymer flocculant (for example, Himorok Q 101) in the polyamine-based polymer flocculant tank 2 is supplied to the front stage of the line mixer 8 through the pipe 13b by the force of is supplied to the line mixer chamber 8. The pipe 13b is provided with a branch vibe, and most of the Himorok Q101 is supplied to the line mixer chamber 8, but a portion is also supplied into the reaction tank 9. A three-way valve is provided at the branch portion of the pipe 13b, so that the amount of supply to each Himolok Q101 can be adjusted as appropriate. 14a is a pump, 14b is a pipe, and a bong 114a
Anionic polyacrylamide polymer flocculant (for example, Himoro Tsuta 5S-500) is supplied to the reaction tank 9 from either of the polyacrylamide polymer flocculant tanks 3a and 3b via the pipe 14b by the force of It is configured. In addition, a branch pipe is provided in the pipe 14b, and most of Himorok 5S-500 is supplied to the reaction tank 9, but a portion is supplied via the branch pipe by adjusting a three-way valve provided at the branch position. It is also supplied to the settling tank 10. 15 is a regeneration tank, 16 is a pipe provided between the filtration tank 11 and the regeneration tank 15, LEA is a valve provided in the pipe 16, and 17 is the filtration tank 11, the separation tank 5, and the regeneration tank 1.
Pipe provided between 5, 17g, 17b,
17c is a valve provided on the pipe 17, and 17d is a pump. A blower 119 is a pipe provided between the blower 18 and the filtration tank 11 and the separation tank 5, and valves 19a and 19b are provided in the pipe 19. 20 is a sludge filtration tank, and this sludge filtration tank 20 is connected to a reaction tank 9, a settling tank 10, and a filtration tank 11 through pipes 21 provided with ball valves 21a, 21b, and 21c, respectively. Next, a method for treating wastewater in the wastewater treatment apparatus configured as described above will be described. First, the pump 6a supplies the wastewater stored in the tank 4 via the vibro b to the separation tank 5, and the pump 12a supplies the ferric chloride aqueous solution in the ferric chloride tank 1 via the pipe 12b. is supplied to the separation tank 5. Incidentally, the flow rate of the wastewater supplied into the separation tank 5 is adjusted at the overflow port 5d, and the overflow is returned to the tank 4. The wastewater supplied to this separation tank 5 at a rate of 251/min passes through a filter 5a, an inclined pipe 5b, and an eye iron plate 5c together with ferric chloride. Debris, mud, and oil were removed from the two houses. The wastewater treated in the separation tank 5 is supplied to the line mixer chamber 8, and the line mixer chamber 8 is supplied with Hymolok Q10 from the polyamine polymer flocculant tank 2 via a pipe 13b by a pump 13a.
In this line mixer chamber 8, Himorok Q101 is uniformly mixed and dispersed in the waste water. Then, in the line mixer room 8, the Himolok Q1
The waste water in which 01 has been mixed and dispersed is supplied to the reaction tank 9. This reaction tank 9 is connected to a pipe 14 by the force of the pump 14a.
b via polyacrylamide polymer flocculant tank 3
Himorok 5S-500 is supplied from a or 3b, and the stirring means 9a in the reaction tank 9 uniformly mixes and disperses Himorok 5S-500 into the waste water. And, Himorok Q1 is mixed and dispersed in the wastewater.
01 and Himorok 5S-500 become cotton-like sludge through a neutralization reaction in the reaction tank 9, and this sludge adsorbs and coagulates emulsified oil, wax, mud, etc. remaining in the wastewater. will be done. The emulsified oil, etc. adsorbed and aggregated by this fluff-like sediment is separated by sedimentation in the settling tank 10 in the next step, and the supernatant water from which the emulsified oil, etc. has been sedimented and removed is provided in the settling tank IO. Sunroid mat 0N-15
The water passes through the filter tob of No. 0 and is supplied to the filtration tank 11, filtered through the activated carbon layer of the filtration tank 11, and then supplied to the regeneration water tank 15 via the pipe 16. The quality of the water in the regenerated water tank 15 that has been regenerated in this way is as shown in Table 1.2. Table 1 Table 2 However, the usage amount of ferric chloride is ZOg/m", the usage amount of Himorok Q101 is 48g/m", and the usage amount of Himorok 5S.
The amount of ferric chloride used is 20 g/m', the amount of ferric chloride used is 80 g/m', and the amount of ferric chloride used is 80 g/m'.
The usage amount of S500 is 56 g/m'. The running costs of the wastewater regeneration treatment in the example shown in Table 1 are as follows: chemical cost is 76 yen/I11', electricity cost is 25 yen/m3, and tongue loss for collecting sediment is 5 yen/wl''. The total cost is 106 yen/1, and the running cost of the wastewater regeneration treatment in the example shown in Table 2 is as follows: chemical cost is 125 yen/!+1', electricity cost is 25 yen/%, and tongue loss is 5 yen/end 3. , the total is 155 yen/-3,
Assuming that recycled water is 200 m' per month, the water and sewage charges in Tokyo are 259 yen/tank 3 as of April 1985, so the treatment cost in Table 1.2 is 106 to 155 yen/lI.
3 is found to be sufficiently low cost. During the above-mentioned regeneration process, the precipitate settled in the settling tank 10 is opened by opening the ball valve 21b, filtered through a sandbag tongue 20a, etc., naturally dehydrated, and then disposed of appropriately. Incidentally, the precipitates precipitated in the reaction tank 9 and the filtration tank 11 are
Ball valve 21. a, 21c may be opened, introduced into the tongue 20a of a sandbag bag, etc., and treated in the same manner as above. As the regeneration process progresses, the effectiveness of the filtration tank 11 weakens, so if the F3M capacity decreases, the wastewater regeneration process is stopped, the valve 16a is closed, the valves 17a and 17b are opened, and the pump 17d is turned on. The blower 18 is operated to supply water from the reclaimed water tank 15 to the filtration tank 11, and the blower 18 is operated as necessary for aeration cleaning, and when the turbidity of the backwash water disappears, the backwashing of the filtration tank 11 is completed. Even if the filtration capacity of the filtration tank 11 decreases, the filtration tank 11 can be easily regenerated. Furthermore, if the capacity of the filter 5a of the separation tank 5 decreases (clogging, etc.) during the regeneration process, the wastewater regeneration process is stopped, the valves 17a and 17c are opened, and the pump 17d is operated to supply the regenerated water 4ff15. The water is supplied to the separation tank 5, and if necessary, the blower 18 is operated to carry out aeration cleaning, and when the backwash water is no longer turbid, the separation tank 5 is
It is only necessary to complete the backwashing work, and even if the capacity of the separation tank 5 decreases, it can be easily regenerated.

【effect】

The wastewater treatment agent according to the present invention is made of a cotton-like substance produced by the reaction between a cationic polyamine polymer flocculant and an anionic polyacrylamide polymer flocculant, so if this wastewater treatment agent is used, wastewater can be regenerated. The treatment cost is low, there is little sludge generation, and recycled water of good quality can be obtained. In addition, the wastewater treatment method according to the present invention adsorbs and aggregates oil in cotton-like material produced by adding a cationic polyamine-based polymer flocculant and an anionic polyacrylamide-based polymer flocculant to wastewater. Since the separated and precipitated oil is removed by this adsorption and coagulation, there is little generation of sludge that requires post-treatment, and it has the advantage of being able to provide recycled water of good quality at a low cost. Further, the wastewater treatment device according to the present invention includes a mixer room, a reaction tank, a settling tank, an i-filtration means, a first flocculant tank, a second flocculant tank, and the first flocculant. A first supply means for supplying a first flocculant from a tank to the mixer chamber, and a second supply means for supplying a second flocculant from the second flocculant tank to the reaction tank. So,
It is possible to effectively generate cotton-like material through the reaction between polyamine-based polymer flocculants and polyacrylamide-based polymer flocculants, thereby generating less sludge that requires post-treatment, and producing recycled water with good quality. Can be provided at low cost,
Furthermore, a mixer chamber is provided, and the first flocculant is supplied to this mixer chamber, and the second flocculant is supplied to the reaction tank, so that cotton-like material can be effectively produced. However, the number of tanks can be reduced, and the device can be made smaller and simpler.

[Brief explanation of the drawing]

The drawing is a schematic diagram of one embodiment of a wastewater treatment apparatus in which the wastewater treatment method according to the present invention is implemented. 1...tank for ferric chloride (third flocculant tank),
2...Polyamine-based polymer'a flocculant tank (first flocculant tank), 3a, 3b...Polyacrylamide-based polymer flocculant tank (second flocculant tank), 4...tank, 5...Separation tank, 6a...Pump, 6b...Pipe, 8...Line mixer room, 9...Reaction tank, 10
...Sedimentation tank, 1]...r filter tank, 12a...pump,
12b...pipe, 13a...pump, 13b...pipe, 14t...pump, 14b...pipe, 15.
...Recycled water tank, 20...Sludge? filtration tank.

Claims (9)

[Claims] (1) A wastewater treatment agent characterized by being made of a cotton-like material produced by a reaction between a cationic polyamine-based polymer flocculant and an anionic polyacrylamide-based polymer flocculant. (2) In the wastewater treatment agent according to claim 1, the amount of the polyamine-based polymer flocculant is 20 g or more per 1 m^3 of treated water, and the amount of the polyacrylamide-based polymer flocculant is is 4g or more per 1 m^3 of treated water. (3) The wastewater treatment agent according to claim 1, further comprising an inorganic flocculant. (4) The wastewater treatment agent according to claim 3, in which the amount of the inorganic flocculant is 1 g or more per 1 m^3 of treated water. (5) The wastewater treatment agent according to claim 3, wherein the inorganic flocculant is ferric chloride. (6) By adding a cationic polyamine-based polymer flocculant and an anionic polyacrylamide-based polymer flocculant to wastewater, oil is adsorbed and agglomerated by the cotton-like material produced, and through this adsorption and aggregation, A wastewater treatment method characterized by removing separated and settled oil. (7) In the wastewater treatment method according to claim 6, an inorganic flocculant is added before the polyamine polymer flocculant and the polyacrylamide polymer flocculant are added. (8) A mixer room, a reaction tank, a settling tank, a filtration means, a first flocculant tank, a second flocculant tank, and a first flocculant from the first flocculant tank. A wastewater treatment device comprising: a first supply means for supplying a mixer chamber; and a second supply means for supplying a second flocculant from the second flocculant tank to the reaction tank. (9) The wastewater treatment device according to claim 8, comprising: a separation tank for wastewater pretreatment; a third coagulant tank;
and third supply means for supplying the third flocculant from the third flocculant tank to the separation tank.