CN112978972B - Treatment method and treatment agent for cigarette adhesive production wastewater - Google Patents

Treatment method and treatment agent for cigarette adhesive production wastewater Download PDF

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CN112978972B
CN112978972B CN201911305383.2A CN201911305383A CN112978972B CN 112978972 B CN112978972 B CN 112978972B CN 201911305383 A CN201911305383 A CN 201911305383A CN 112978972 B CN112978972 B CN 112978972B
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wastewater
coagulant aid
flocculant
treating
filtering
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CN112978972A (en
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吴爱军
刘文富
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Beijing Changrun Chemicals Co ltd
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Beijing Changrun Chemicals Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
    • C02F1/56—Macromolecular compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/30—Organic compounds
    • C02F2101/34—Organic compounds containing oxygen
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

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  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

The invention discloses a method for treating cigarette adhesive production wastewater, which relates to the field of cigarette adhesive wastewater treatment, and provides that a coagulant aid I, a coagulant aid II and a granular flocculant I are used, the flocculant II realizes the full flocculation of the cigarette adhesive wastewater, then multi-stage filtration and reverse osmosis filtration are utilized, the obtained filtered water reaches the national first-stage discharge standard, the safe discharge of the cigarette adhesive wastewater is realized, in addition, the method prolongs the service life of a reverse osmosis filtration system, improves the filtration efficiency, and has the advantages of simple method, low cost and wide universality.

Description

Treatment method and treatment agent for cigarette adhesive production wastewater
Technical Field
The invention relates to the field of wastewater treatment, in particular to a treatment method and a treatment agent for cigarette adhesive production wastewater.
Background
The cigarette adhesive is a special adhesive applied to cigarette bonding and forming, and is an indispensable raw and auxiliary material in the cigarette manufacturing process. However, in the cigarette glue production process, a certain amount of waste water is generated by cleaning production equipment and is generally treated by a flocculation and filtration method, but the main solid substances in the cigarette glue waste water are ethylene-vinyl acetate and polyvinyl alcohol polymer particles, and the concentration of the solid substances is about 0.5-1%. The cigarette glue wastewater contains other substances such as a plasticizer and the like in addition to polyvinyl acetate (and polyvinyl alcohol) particles. Plasticizers in wastewater are easily removed using polyaluminum chloride (PAC). The flocculation effect of the flocculating agent can be enhanced when the content of the polyvinyl alcohol is low. However, the flocculation effect of particles in the wastewater is deteriorated in both cases where the polyvinyl alcohol content is high and where the wastewater temperature is low. The cigarette glue waste water that the flocculation is insufficient directly gets into activated carbon or reverse osmosis membrane and filters, and remaining colloid can rapid jam filtration system and can't clear away in the waste water, and is visible, because the nature of cigarette glue waste water itself, leads to conventional flocculation to add filterable method can not effective processing cigarette glue waste water.
In 2008, Chinese patent document CN101172723A provides a method for treating vinyl acetate-ethylene copolymer emulsion wastewater, which uses a high-efficiency composite coagulant consisting of ferric trichloride, potassium sulfate, sodium sulfate, ferric sulfate and sodium tetraborate and cationic polyacrylamide in sequence, wherein the treatment effect of the method reaches the first-level discharge standard required in the national Integrated wastewater discharge Standard GB 101172723A-1996, and the effect is obvious.
Disclosure of Invention
In order to solve the problem that the polyvinyl alcohol-containing cigarette glue wastewater in the prior art cannot be sufficiently flocculated, the invention provides a cigarette glue wastewater treatment method and a treatment agent.
In order to achieve the technical purpose of the invention, the invention provides a method for treating cigarette adhesive production wastewater, which comprises the following steps:
when the wastewater is in a state of full contact with air, immediately adding coagulant aid I solution into the wastewater, mixing, and adding coagulant aid II solution to enable the mixed wastewater to reach a pH set value;
adding granular flocculant I into the mixed wastewater, adding a flocculant II solution after initial setting to continue flocculation, and stopping the full contact state of the wastewater and air when the wastewater becomes transparent to obtain flocculate and supernate;
filtering the supernatant liquid by a sand filter and activated carbon in sequence, quickly pouring the filtered filtrate into a sedimentation tank, and filtering by using the activated carbon to obtain filtered water which can be sent into a reverse osmosis filtering system;
filtering the filtered water in a filtering system with a reverse osmosis filtering membrane to obtain filtered water which can be directly discharged, and recycling flocculate and filter residue generated in the filtering process.
Wherein the coagulant aid I is boric acid or borax, sodium tetraborate or glutaraldehyde.
Wherein, the coagulant aid II is strong base, such as sodium hydroxide, potassium hydroxide and the like.
Wherein the dosage of the coagulant aid I is 30-90 g/ton, preferably 35-70 g/ton.
Wherein, the dosage of the coagulant aid II is 100-1000 mL/ton, preferably 300-800 mL/ton.
Wherein the coagulant aid I solution is a saturated solution.
Wherein the mass concentration of the coagulant aid II solution is 3-15%.
Preferably, the mass concentration of the coagulant aid II solution is 5-10%.
Wherein the mixing time of the coagulant aid I is 8-28 min.
Preferably, the mixing time for adding the coagulant aid I is 10-25 min.
Wherein the set value of the pH is 7-8.
It is to be noted that the invention adopts a dripping mode when adding the coagulant aid II, and the pH value is monitored while dripping, so that the pH value of the wastewater in the dripping process is always 7-8.
Wherein, the state that the wastewater is fully contacted with the air can be realized by an aeration system, and any other system with the same function as the aeration system can also be adopted.
Wherein the flocculating agent I is cationic polyacrylamide.
Wherein the dosage of the flocculant I is 1.8-4.6 g/ton, preferably 2.0-4.0 g/ton.
Wherein the flocculating agent II is polyaluminium chloride.
Wherein the dosage of the flocculant II is 50-100 g/ton, preferably 60-90 g/ton, and more preferably 70-80 g/ton.
Wherein the time for adding flocculant II is when the wastewater becomes translucent.
Preferably, the time for adding the flocculating agent II is 15-20min after adding the flocculating agent I.
To achieve the technical object of the present invention, in yet another aspect, the present invention provides a treating agent for treating cigarette glue wastewater, comprising:
a coagulant aid I for use in the waste water fed in a state of sufficient contact with air;
a coagulant aid II for adjusting the pH of the wastewater after the mixed coagulant aid I;
a flocculant I added to the wastewater having the adjusted pH; and
a flocculant II for sufficiently flocculating the wastewater;
wherein the coagulant aid I is one of boric acid or borax, sodium tetraborate and glutaraldehyde; the coagulant aid II is a strong alkali solution;
wherein the flocculating agent I is cationic polyacrylamide; the flocculant II is polyaluminium chloride.
It should be noted that the features and advantages described in the above method for treating waste water from cigarette glue production are also applicable to a treating agent for treating waste water from cigarette glue production, and are not described herein again.
In order to achieve the technical purpose of the invention, the invention also provides the application of the method or the treating agent for treating the wastewater of the polyvinyl acetate-ethylene copolymer emulsion.
Wherein the polyvinyl acetate-ethylene copolymer emulsion wastewater is cigarette adhesive wastewater.
Advantageous effects
1. According to the method provided by the invention, before the flocculant is used, the coagulant aid I and the coagulant aid II are used to separate the macromolecular protective colloid in the wastewater from the surface of the polyvinyl acetate particles, so that the flocculation of the flocculant on the wastewater is facilitated, and the technical problems that the cigarette adhesive wastewater is incompletely treated, a filtering system is easy to block, the filter material and a reverse osmosis membrane are frequently replaced, and the wastewater treatment cost is increased in the field of cigarette adhesives are solved.
2. The method provided by the invention has the advantages that the granular flocculating agent is used, the flocculating agent does not need to be configured, the method is simple, the cost is low, the flocculating efficiency is high, and the method has obvious effects.
3. The method provided by the invention not only prolongs the service life of the reverse osmosis filtration system, but also can realize the high-efficiency treatment of the cigarette adhesive wastewater, the treated wastewater can be directly discharged into the environment, the ecological environment cannot be destroyed, and the social benefit is remarkable.
Drawings
FIG. 1 is a flow chart of a method for treating cigarette glue wastewater according to example 1 of the present invention.
Detailed Description
The method of treating wastewater of the present invention is described in more detail below, in which preferred embodiments of the present invention are shown, and it is understood that those skilled in the art can modify the present invention described herein while still achieving the advantageous effects of the present invention. Accordingly, the following description is to be construed as broadly as is known to those skilled in the art and not as a limitation on the invention, and methods and reagents not specifically set forth in the following description are conventionally or commercially available.
EXAMPLE 1 treatment agent for treating cigarette glue wastewater
The treating agent for treating the cigarette glue wastewater comprises a coagulant aid I which is used for being put into the wastewater in a state of being fully contacted with air; a coagulant aid II for adjusting the pH of the wastewater after the mixed coagulant aid I; a flocculant I added to the wastewater with the pH adjusted; and a flocculating agent II for fully flocculating the wastewater;
specifically, the coagulant aid I is boric acid; the coagulant aid II is strong alkali solution NaOH;
specifically, the flocculant I is cationic polyacrylamide; the flocculant II is polyaluminium chloride.
More specifically, the coagulant aid I is a saturated solution, and the strong alkali solution is 3% in mass concentration.
Specifically, the dosage of the boric acid is 90 g/ton, and the dosage of the strong alkali solution is 1000 mL/ton, preferably 800 mL/ton; the dosage of the cationic polyacrylamide is 1.8 g/ton; the amount of polyaluminium chloride used was 100 g/ton.
Example 2 treatment agent for treating cigarette glue wastewater
Except that borax is used as a flocculating agent I, the dosage of the borax is 30 g/ton, and the dosage of the strong alkali solution is 100 mL/ton, preferably 300 mL/ton; the dosage of the cationic polyacrylamide is 1.8 g/ton; the amount of polyaluminum chloride used was the same as in example 1 except that the amount of polyaluminum chloride used was 100 g/ton.
EXAMPLE 3 treatment agent for treating cigarette glue wastewater
Except that sodium tetraborate is adopted as a flocculating agent I, the dosage of the sodium tetraborate is 90 g/ton, and the dosage of the strong base solution is 1000 mL/ton; the dosage of the cationic polyacrylamide is 4.6 g/ton; the amount of polyaluminum chloride used was the same as in example 1 except that the amount of polyaluminum chloride used was 50 g/ton.
Example 4 treatment agent for treating cigarette glue wastewater
Except that glutaraldehyde is used as a flocculating agent I, the dosage of boric acid is 40 g/ton, and the dosage of strong alkali solution is 300 mL/ton; the dosage of the cationic polyacrylamide is 2.0 g/ton; the amount of polyaluminum chloride used was the same as in example 1 except that the amount of polyaluminum chloride used was 80 g/ton.
EXAMPLE 5 treatment agent for treating cigarette glue wastewater
The dosage of the boric acid or borax, sodium tetraborate and glutaraldehyde is 35 g/ton, and the dosage of the strong base solution is 400 mL/ton; the dosage of the cationic polyacrylamide is 2.5 g/ton; the amount of polyaluminum chloride used was the same as in example 1 except that the amount of polyaluminum chloride used was 70 g/ton.
EXAMPLE 6 treatment agent for treating cigarette glue wastewater
The dosage of the strong alkali solution is 800 mL/ton except boric acid or borax, sodium tetraborate and glutaraldehyde; the dosage of the cationic polyacrylamide is 4.0 g/ton; the amount of polyaluminum chloride used was the same as in example 1 except that the amount of polyaluminum chloride used was 60 g/ton.
Example 7 treatment agent for treating cigarette glue wastewater
The dosage of the strong alkali solution is 700 mL/ton except the boric acid or the borax, the sodium tetraborate and the glutaraldehyde; the dosage of the cationic polyacrylamide is 3.0 g/ton; the amount of polyaluminum chloride used was the same as in example 1 except that the amount of polyaluminum chloride used was 70 g/ton.
EXAMPLE 8 treatment agent for treating cigarette glue wastewater
The dosage of the strong alkali solution is 500 mL/ton except that the boric acid or the borax, the sodium tetraborate and the glutaraldehyde is 50 g/ton; the dosage of the cationic polyacrylamide is 3.5 g/ton; the amount of polyaluminum chloride used was the same as in example 1 except that the amount of polyaluminum chloride used was 50 g/ton.
EXAMPLE 9 treatment agent for treating cigarette glue wastewater
The examples were the same as examples 1 to 8 except that the alkali solution had a mass concentration of 15%.
EXAMPLE 10 treatment agent for treating cigarette glue wastewater
The examples were the same as examples 1 to 8 except that the alkali solution had a mass concentration of 13%.
EXAMPLE 11 treatment agent for treating cigarette glue wastewater
The same as any one of examples 1 to 8 was carried out except that the alkali solution had a mass concentration of 10%.
EXAMPLE 12 treatment agent for cigarette glue wastewater
The examples were the same as examples 1 to 8 except that the alkali solution had a mass concentration of 8%.
It should be noted that in one embodiment of the present invention, the amount of coagulant aid I added is any value within the range of 30-90 g/ton, such as 32, 34, 37, 39, 41, 43, 45, 47, 49, 51, 53, 55, 56, 57, 59, 60, 61, 63, 64, 66, 67, 68, 70, 72, 74, 76, 77, 79, 80, 81, 83, 85, 86, 87, 89, etc.; coagulant aid II may be added in any amount of 100-; the amount of flocculant I used is any number in the range of 1.8 to 4.6 g/ton, e.g. 1.9, 2.1, 2.3, 2.4, 2.6, 2.8, 2.9, 3.2, 3.4, 3.6, 3.7, 3.8, 3.9, 4.0, 4.1, 4.2, 4.3, 4.4, 4.5; the technical object of the invention can be achieved with the amount of flocculant II in any of the ranges from 50 to 100 g/ton, for example 53, 56, 58, 61, 63, 65, 67, 69, 70, 71, 74, 75, 78, 79, 80, 82, 84, 86, 88, 90, 93, 94, 96, 98, 99.
The following steps of the method for treating waste water in the cigarette glue manufacturing industry by using the treating agent for treating cigarette glue waste water provided in any one of embodiments 1 to 12 are specifically as follows
Example 13
As shown in FIG. 1, the method for treating waste water in cigarette glue manufacturing industry of the present invention comprises:
step S101 of coagulation aiding treatment
The method comprises the steps of collecting waste water generated by flushing equipment during cigarette glue production in a reaction tank, opening an aeration system arranged in the reaction tank to enable the waste water in the reaction tank to be always in a sufficient contact state with air so as to exchange gaseous substances and remove volatile substances in water, adding a coagulant aid I, adding a coagulant aid II after the coagulant aid I and the waste water are fully reacted, and enabling the pH value of the waste water to reach a set value.
The inventor analyzes the waste water and finds that polyvinyl alcohol particles in the cigarette glue waste water are attached to the surfaces of polyvinyl acetate particles, the polyvinyl alcohol particles are difficult to separate from the polyvinyl acetate particles even if an aeration system is adopted, and if a flocculating agent is directly added according to a conventional method, flocculation cannot be effectively crosslinked with the polyvinyl acetate particles, so that the flocculation effect is poor. Therefore, the inventor carries out a great deal of experimental research and discovers that the problem that polyvinyl alcohol particles in cigarette glue wastewater are attached to the surfaces of polyvinyl acetate particles can be solved by only adding boric acid or one of borax, sodium tetraborate and glutaraldehyde as a coagulant aid I to mix with the wastewater for pretreatment and then using an alkaline solution such as sodium hydroxide as a coagulant aid II to adjust the pH of the wastewater before flocculation, and the method is simple and low in cost.
Furthermore, the inventor has found through experiments that air is attached to suspended latex particles by the air flotation of the aeration system, the net structure of floc is easier to capture air bubbles and separate, and after floating on the surface of wastewater, polyvinyl alcohol particles and polyvinyl acetate particles can be effectively separated by using the coagulant aids I and II.
In order to achieve the purpose, researches show that the aeration system is opened to ensure that the wastewater is fully contacted with the air, and then the coagulant aid I solution is added, at the moment, the air flotation effect of the aeration system attaches the air to the suspended latex particles, the net structure of the flocs is easier to capture bubbles and separate out, the flocs float on the surface of the wastewater, the polyvinyl alcohol particles in the wastewater can be effectively separated from the polyvinyl acetate particles, the surfaces of the polyvinyl acetate particles are exposed, and the addition amount and the reaction time of the coagulant aid I are changed according to the volume change of the wastewater; the technical object of the present invention can be achieved for any time period within the range of 8 to 28min of the reaction time period (i.e., the mixing time period). After the above reaction is completed, coagulant aid II is added thereto in an amount such that the addition is stopped when the pH in the waste water reaches a range of 7 to 8.
It should be noted that, when the coagulant aid II is added, the coagulant aid II should be slowly added for a plurality of times to ensure that the pH value in the wastewater is between 7 and 8, and the coagulant aid II can be slowly added for a plurality of times by selecting a dropwise adding mode.
Specifically, in order to realize accurate pH adjustment, the coagulant aid II is added into the reaction tank, and a pH monitoring system is arranged in the reaction tank and is obtained commercially.
The invention adopts the step S101, so that polyvinyl alcohol particles and polyvinyl acetate particles are effectively separated, and favorable conditions are provided for subsequent flocculation treatment.
Step S102, flocculation treatment
And (3) slowly adding a flocculating agent I when the pH value in the reaction tank reaches 7-8, adding a flocculating agent II when the wastewater is gradually flocculated and semi-permeable, continuing aerating for 5min when the wastewater is transparent, and closing an aeration system.
The inventor finds out through a large number of experiments that the flocculation effect is better by using powdery cationic polyacrylamide as a flocculating agent I to be directly put into the cigarette glue production wastewater subjected to coagulation aiding treatment and spraying a polyaluminium chloride solution into the wastewater after reaction for a period of time.
Step S103 of multistage filtering processing
After flocculation is finished, collecting flocculates floating on the surface of the reaction tank, filtering lower clear liquid through a sand filter and active carbon in sequence, quickly dumping the lower clear liquid into a sedimentation tank, and filtering the upper clear liquid through the active carbon again after sedimentation to obtain filtered water capable of being sent into a reverse osmosis filtering system.
It should be noted that the supernatant may be rapidly poured through the settling tank one or more times.
The method comprises the steps of filtering large granular substances of the supernatant through a sand filter, separating the large granules suspended in the supernatant by utilizing gaps in the sand filter, then feeding the residual supernatant into activated carbon, adsorbing and filtering small granules, residual colloid and peculiar smell in the supernatant by utilizing the pore structure of the activated carbon, then quickly pouring the filtrate into a sedimentation tank, and feeding the supernatant separated from the sedimentation tank into the activated carbon again for adsorbing and filtering the small granules and the peculiar smell.
Step S104 reverse osmosis filtration
And feeding the filtered water into a reverse osmosis filtering system, and filtering by a reverse osmosis filtering membrane to obtain final filtered water.
The reverse osmosis filtration membrane used in the present invention is a reverse osmosis membrane using FR series anti-fouling membranes.
Test example 1
The method provided by the embodiment 1 of the invention is used for treating the wastewater generated by flushing equipment during the production of cigarette glue, and in order to illustrate the effect of the method, the physicochemical properties of the wastewater are detected before the treatment, and the detection results are shown in table 1.
TABLE 1 physicochemical Properties of wastewater
Detecting items The result of the detection
pH 7.5
Chemical Oxygen Demand (COD) mg/L 1.57×10 4
Five-day Biochemical Oxygen Demand (BOD) 5 ) 3.02×10 3
Suspended substance mg/L 3.53×10 3
Ammonia nitrogen mg/L 1.05
As can be seen from the results shown in Table 1, the Chemical Oxygen Demand (COD) in the wastewater was 1.57X 10 4 ml/L, biochemical oxygen demand BOD for five days 5 Up to 3.02X 10 3, Suspension 3.53X 10 3 ml/L, it can be seen that the wastewater to be treated far fails to meet the wastewater discharge requirement.
Specifically, the process for treating the cigarette glue wastewater by using the method provided by the embodiment 1 of the invention comprises the following steps:
concentrating waste water generated in the production process of cigarette glue in a reaction tank, opening an aeration system to enable the waste water in the reaction tank to be in a gas-water exchange state, then adding a boric acid saturated aqueous solution, wherein the using amount of boric acid is 40-60 g/ton of waste water, slowly adding a NaOH solution with the concentration of 8% after aeration mixing is carried out for 10min, slowly adding polyacrylamide particles when the pH value of the waste water reaches the range of 7-8, continuing aeration for 15min, finally uniformly adding a polyaluminium chloride solution with the concentration of 26% by mass, stopping adding the polyaluminium chloride when the waste water in the reaction tank begins to become transparent, and closing the aeration system after continuing aeration for 5 min.
At the moment, flocs can float on the upper layer of the solution, after the flocs are collected, the lower clear liquid is discharged to a sand filter, the flocculated wastewater passes through the sand filter, suspended large-particle flocs are removed, the residual wastewater is sent to activated carbon for filtering, particles are filtered, peculiar smell is adsorbed, then the filtered wastewater is sent to a sedimentation tank for buffering, sedimentation and filtration, the settled supernatant is filtered again in the activated carbon, and finally the obtained filtrate is sent to a reverse osmosis membrane for filtration to obtain the final filtered water.
The final filtered water was collected and tested, and the test results are shown in table 2.
TABLE 2 filtered water test results
Detecting items The result of the detection
pH 8.09
Chemical Oxygen Demand (COD) mg/L 11
Five-day Biochemical Oxygen Demand (BOD) 5 ) 3.2
Suspended substance mg/L ＜5
Ammonia nitrogen mg/L 0.832
As is clear from the results of the examination in Table 2, the final filtered water obtained by the treatment method of the present invention had a COD of much less than 30mg/L and was clear. Meets the requirements of 100mg/L of GB/T11-1996 standard in China and 30mg/L of DB11/307-2013 local standard in Beijing.
The inventor discovers that the method can still filter the effluent meeting the national first-level discharge standard when the service life of the reverse osmosis filtering membrane reaches 500 days, and the filtering efficiency of the RO reverse osmosis filtering membrane can still reach more than 80 percent by long-term observation, so that the method not only realizes the normal discharge of the wastewater, but also prolongs the replacement period of the filtering membrane and reduces the cost.
The above description is only a preferred example for facilitating understanding of the present invention and is not intended to limit the present invention, and various modifications and changes may be made to the present invention by those skilled in the art. All changes, equivalents, and modifications that come within the spirit and scope of the invention are desired to be protected.

Claims (6)

1. A method for treating cigarette glue wastewater is characterized by comprising the following steps:
when the wastewater is in a sufficient contact state with air, immediately adding a coagulant aid I solution into the wastewater, mixing, and adding a coagulant aid II solution to enable the mixed wastewater to reach a set value of pH, wherein the coagulant aid I is one or more of boric acid or borax, sodium tetraborate and glutaraldehyde, and the coagulant aid II is strong base;
adding a granular flocculant I into the mixed wastewater, adding a flocculant II solution after initial setting to continue flocculation, and stopping the full contact state of the wastewater and air when the wastewater becomes transparent to obtain flocculates and a supernatant, wherein the flocculant I is cationic polyacrylamide, and the flocculant II is polyaluminium chloride;
filtering the supernatant liquid by a sand filter and activated carbon in sequence, precipitating the filtered filtrate, and filtering by the activated carbon again to obtain filtered water which can be sent into a reverse osmosis filtering system;
filtering the filtered water in a filtering system with a reverse osmosis filtering membrane to obtain filtered water which can be directly discharged, and recycling flocculate and filter residue generated in the filtering process.
2. The method for treating waste water of cigarette glue according to claim 1, wherein the sufficient contact between the waste water and air is achieved by using an aeration system.
3. The method according to claim 1, wherein the granular flocculant I has a particle size of less than 1 mm.
4. A treating agent for treating cigarette adhesive wastewater is characterized by comprising the following components:
a coagulant aid I for use in the waste water fed in a state of sufficient contact with air;
a coagulant aid II for adjusting the pH of the wastewater mixed with the coagulant aid I;
a flocculant I added to the wastewater with the pH adjusted; and
a flocculating agent II for fully flocculating the wastewater;
wherein the coagulant aid I is one of boric acid or borax, sodium tetraborate and glutaraldehyde; the coagulant aid II is a strong alkali solution;
wherein the flocculant I is cationic polyacrylamide; the flocculant II is polyaluminium chloride.
5. Use of the method according to any one of claims 1 to 3 for treating waste water of polyvinyl acetate-ethylene copolymer emulsions.
6. Use of the treating agent of claim 4 for treating wastewater of polyvinyl acetate-ethylene copolymer emulsion.
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993008219A1 (en) * 1991-10-21 1993-04-29 Henkel Kommanditgesellschaft Auf Aktien Improved process for removing organic polymer impurities from aqueous phases
CN101172723A (en) * 2007-10-19 2008-05-07 北京工业大学 Method for processing vinyl acetate-ethylene copolymerization emulsions wastewater
CN101891320A (en) * 2010-07-12 2010-11-24 胜利油田森诺胜利工程有限公司 Treatment method realizing polymer-bearing produced wastewater resource utilization
CN105692826A (en) * 2016-01-22 2016-06-22 南通海陵环境检测有限公司 Flocculating agent composition for treating textile wastewater and using method thereof
CN106082519A (en) * 2016-08-12 2016-11-09 安徽皖维高新材料股份有限公司 A kind of polyvinyl alcohol produces the recovery and treatment method of waste liquid

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993008219A1 (en) * 1991-10-21 1993-04-29 Henkel Kommanditgesellschaft Auf Aktien Improved process for removing organic polymer impurities from aqueous phases
CN101172723A (en) * 2007-10-19 2008-05-07 北京工业大学 Method for processing vinyl acetate-ethylene copolymerization emulsions wastewater
CN101891320A (en) * 2010-07-12 2010-11-24 胜利油田森诺胜利工程有限公司 Treatment method realizing polymer-bearing produced wastewater resource utilization
CN105692826A (en) * 2016-01-22 2016-06-22 南通海陵环境检测有限公司 Flocculating agent composition for treating textile wastewater and using method thereof
CN106082519A (en) * 2016-08-12 2016-11-09 安徽皖维高新材料股份有限公司 A kind of polyvinyl alcohol produces the recovery and treatment method of waste liquid

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