CN110803799A - Method for treating waste liquid from heat treatment of bamboo wood - Google Patents
Method for treating waste liquid from heat treatment of bamboo wood Download PDFInfo
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- CN110803799A CN110803799A CN201911123452.8A CN201911123452A CN110803799A CN 110803799 A CN110803799 A CN 110803799A CN 201911123452 A CN201911123452 A CN 201911123452A CN 110803799 A CN110803799 A CN 110803799A
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- waste liquid
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- treatment waste
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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
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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
- C02F1/00—Treatment of water, waste water, or sewage
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
-
- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/285—Treatment of water, waste water, or sewage by sorption using synthetic organic sorbents
-
- 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
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- 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
- C02F2103/26—Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof
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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 Using Semi-Permeable Membranes (AREA)
- Water Treatment By Sorption (AREA)
Abstract
The invention discloses a method for treating waste liquor of bamboo heat treatment, which is mainly characterized in that the waste liquor of bamboo heat treatment is subjected to impurity interception through a grating, then adsorbent adsorption treatment, acid solution treatment, alkali solution treatment and purifying solution treatment are added into the waste liquor of bamboo heat treatment, and finally the waste liquor is filtered through a hollow fiber ultrafiltration membrane.
Description
Technical Field
The invention relates to the technical field of wastewater treatment, in particular to a method for treating waste liquid generated in bamboo heat treatment.
Background
China is the biggest bamboo resource owning country and producing country in the world, heat treatment is adopted by many bamboo enterprises as a new bamboo modification technology, and the bamboo has the following advantages after heat treatment: 1. the heat treatment can degrade the nutrient substances such as starch, sugar and the like in the bamboo wood, and improve the performances of corrosion resistance, mildew resistance, moth resistance and the like; 2. the heat treatment can improve the dimensional stability of the bamboo product; 3. the color of the bamboo can be changed by heat treatment, the requirements of people on bamboo products with different colors are met, and at present, various bamboo heat treatment products, such as a carbonized color bamboo floor, a carbonized color bamboo curtain, carbonized color bamboo furniture, a carbonized color bamboo mat, a carbonized color bamboo tea set and the like, have been developed. However, a large amount of waste liquid with faint yellow to brown color, peculiar smell and suspended matters is generated in the heat treatment process, 76 compounds containing benzene rings, heterocycles and the like are detected by using a gas chromatograph-mass spectrometer (GC/MS) to test the components of the waste water, and through further analysis, the waste liquid is weakly acidic (pH is 4.6), the Chemical Oxygen Demand (COD) is 12950mg/L, the ammonia nitrogen content is 10.1mg/L, the total phosphorus content is 4.6mg/L, and the indexes of pollutants in the waste water are seriously out of limits. Because of no effective and reasonable treatment technology, most bamboo enterprises directly discharge the waste water in the production without any treatment or only simple precipitation treatment; due to the high concentration of pollutants in the wastewater, the phenomena of black and odorous surface water bodies, eutrophication, soil hardening and the like appear on the periphery of a plant area gradually after the wastewater is discharged for a long time, and the environmental pollution is serious.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a bamboo heat treatment waste liquid treatment method, which can effectively remove suspended matters and harmful chemical components in the waste liquid under corresponding conditions through a reasonable waste liquid treatment method, so that nutrients such as starch, sugar and the like in bamboo are degraded, the treated waste liquid does not pollute the environment, and the method accords with the primary standard in the national sewage discharge standard.
(II) technical scheme
In order to achieve the above purpose, the invention provides the following technical scheme:
the bamboo heat treatment waste liquid treatment method comprises the following steps:
1) intercepting impurities in the bamboo heat treatment waste liquid through a grating, adding an adsorbent into the bamboo heat treatment waste liquid, wherein the addition amount of the adsorbent is 50-80% of that of the bamboo heat treatment waste liquid, stirring at a constant speed for 40-50h, and controlling the stirring speed to be 200-300 revolutions per minute;
2) filtering the bamboo heat treatment waste liquid obtained in the step 1), removing the adsorbent, allowing the bamboo heat treatment waste liquid to flow into a first treatment room, adding an acid solution into the first treatment room, introducing inert gas into the first treatment room, and adjusting the pH value of the bamboo heat treatment waste liquid to 4.2-5.5;
3) allowing the bamboo heat treatment waste liquid subjected to acid treatment in the step 2) to flow into a second treatment room, adding an alkali solution, and adjusting the pH value of the bamboo heat treatment waste liquid to 8.5-9.2;
4) allowing the bamboo heat treatment waste liquid subjected to alkali treatment in the step 3) to flow into a third treatment room, and adding a purifying liquid, wherein the purifying liquid comprises the following raw materials: 3-5% of sodium hyaluronate, 2-4% of dipropylene glycol, 7-12% of trehalose, 15-20% of hydroxyethyl cellulose, 15-25% of sodium thiosulfate, 4-5% of dipotassium glycyrrhizinate and the balance of deionized water;
5) and (3) allowing the bamboo heat treatment waste liquid purified in the step 4) to flow into a fourth treatment room, filtering by using a hollow fiber ultrafiltration membrane, inspecting the qualified water quality and discharging, and otherwise, repeating the steps 2), 3) and 4).
The adsorbent in the step 1) is zeolite molecular sieve, nano activated carbon, alumina powder or ammonium polyacrylate.
The acid solution in the step 2) is one or more of dilute hydrochloric acid solution, sulfurous acid solution, nitrous acid solution, phosphoric acid solution and carbonic acid.
The alkali solution in the step 3) is one or more of a sodium hydroxide solution, a sodium bicarbonate solution, a sodium carbonate solution or ammonia water.
The purifying liquid comprises the following raw materials: 4% of sodium hyaluronate, 3% of dipropylene glycol, 10% of trehalose, 18% of hydroxyethyl cellulose, 20% of sodium thiosulfate, 5% of dipotassium glycyrrhizinate and the balance of deionized water.
The filtering diameter of the hollow fiber ultrafiltration membrane is 0.01-0.1 micron, and the filtering temperature is controlled at 35-40 ℃.
(III) advantageous effects
Compared with the prior art, the invention provides a method for treating the waste liquid generated by the heat treatment of the bamboo wood, and the method can effectively remove suspended matters and harmful chemical components in the waste liquid under corresponding conditions through a reasonable waste liquid treatment method, so that the nutrients such as starch, sugar and the like in the bamboo wood are degraded, the treated waste liquid does not pollute the environment, and the method meets the first-level standard in the national sewage discharge standard.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
the bamboo heat treatment waste liquid treatment method comprises the following steps:
1) after impurities are intercepted by the bamboo heat treatment waste liquid through a grating, adding a zeolite molecular sieve into the bamboo heat treatment waste liquid, wherein the adding amount of the zeolite molecular sieve is 50% of that of the bamboo heat treatment waste liquid, and stirring at a constant speed for 40 hours, wherein the stirring speed is controlled to be 200 revolutions per minute;
2) filtering the bamboo heat treatment waste liquid obtained in the step 1), removing the zeolite molecular sieve, allowing the bamboo heat treatment waste liquid to flow into a first treatment room, adding a dilute hydrochloric acid solution into the first treatment room, introducing inert gas, and adjusting the pH value of the bamboo heat treatment waste liquid to 4.2;
3) allowing the bamboo heat treatment waste liquid subjected to acid treatment in the step 2) to flow into a second treatment room, adding a sodium hydroxide solution, and adjusting the pH value of the bamboo heat treatment waste liquid to 8.5;
4) allowing the bamboo heat treatment waste liquid subjected to alkali treatment in the step 3) to flow into a third treatment room, and adding a purifying liquid, wherein the purifying liquid comprises the following raw materials: 4% of sodium hyaluronate, 3% of dipropylene glycol, 10% of trehalose, 18% of hydroxyethyl cellulose, 20% of sodium thiosulfate, 5% of dipotassium glycyrrhizinate and the balance of deionized water;
5) and (3) allowing the bamboo heat treatment waste liquid purified in the step 4) to flow into a fourth treatment room, filtering by a 0.01-micron hollow fiber ultrafiltration membrane, controlling the temperature to be 35 ℃, checking that the water quality is qualified and the water can be discharged after the completion, and otherwise, repeating the steps 2), 3) and 4).
Example two:
the bamboo heat treatment waste liquid treatment method comprises the following steps:
1) intercepting impurities in the bamboo heat treatment waste liquid through a grating, adding nano activated carbon into the bamboo heat treatment waste liquid, wherein the adding amount of the nano activated carbon is 70% of that of the bamboo heat treatment waste liquid, stirring at a constant speed for 45 hours, and controlling the stirring speed to be 250 revolutions per minute;
2) filtering the bamboo heat treatment waste liquid obtained in the step 1), removing the nano activated carbon, allowing the bamboo heat treatment waste liquid to flow into a first treatment room, adding a carbonic acid solution into the first treatment room, introducing inert gas, and adjusting the pH value of the bamboo heat treatment waste liquid to 5.0;
3) allowing the bamboo heat treatment waste liquid subjected to acid treatment in the step 2) to flow into a second treatment room, adding an ammonia water solution, and adjusting the pH value of the bamboo heat treatment waste liquid to 9.0;
4) allowing the bamboo heat treatment waste liquid subjected to alkali treatment in the step 3) to flow into a third treatment room, and adding a purifying liquid, wherein the purifying liquid comprises the following raw materials: 4% of sodium hyaluronate, 3% of dipropylene glycol, 10% of trehalose, 18% of hydroxyethyl cellulose, 20% of sodium thiosulfate, 5% of dipotassium glycyrrhizinate and the balance of deionized water;
5) and (3) allowing the bamboo heat treatment waste liquid purified in the step 4) to flow into a fourth treatment room, filtering by a hollow fiber ultrafiltration membrane with the filter diameter of 0.05 micron, controlling the temperature at 35 ℃, checking that the water quality is qualified and the water can be discharged after the completion, and otherwise, repeating the steps 2), 3) and 4).
Example three: the bamboo heat treatment waste liquid treatment method comprises the following steps:
1) after intercepting impurities in the bamboo heat treatment waste liquid through a grating, adding alumina powder into the bamboo heat treatment waste liquid, wherein the addition amount of the alumina powder is 80% of that of the bamboo heat treatment waste liquid, and stirring at a constant speed of 300 revolutions per minute for 50 hours;
2) filtering the bamboo heat treatment waste liquid obtained in the step 1), removing aluminum oxide powder, flowing into a first treatment room, adding a sulfurous acid solution into the first treatment room, introducing inert gas, and adjusting the pH value of the bamboo heat treatment waste liquid to 5.5;
3) allowing the bamboo heat treatment waste liquid subjected to acid treatment in the step 2) to flow into a second treatment room, adding a sodium bicarbonate solution, and adjusting the pH value of the bamboo heat treatment waste liquid to 9.2;
4) allowing the bamboo heat treatment waste liquid subjected to alkali treatment in the step 3) to flow into a third treatment room, and adding a purifying liquid, wherein the purifying liquid comprises the following raw materials: 4% of sodium hyaluronate, 3% of dipropylene glycol, 10% of trehalose, 18% of hydroxyethyl cellulose, 20% of sodium thiosulfate, 5% of dipotassium glycyrrhizinate and the balance of deionized water;
5) and (3) allowing the bamboo heat treatment waste liquid purified in the step 4) to flow into a fourth treatment room, filtering by a hollow fiber ultrafiltration membrane with the filter diameter of 0.1 micron, controlling the temperature at 40 ℃, checking that the water quality is qualified and the water can be discharged after the completion of the filtering, and otherwise, repeating the steps 2), 3) and 4).
Experimental example four: the bamboo heat treatment waste liquid treatment method comprises the following steps:
1) after intercepting impurities in the bamboo heat treatment waste liquid through a grating, adding nano activated carbon and ammonium polyacrylate in equal mass ratio into the bamboo heat treatment waste liquid, wherein the total addition amount of the nano activated carbon and the ammonium polyacrylate is 75% of the bamboo heat treatment waste liquid, and uniformly stirring for 45 hours at a stirring speed of 250 revolutions per minute;
2) filtering the bamboo heat treatment waste liquid obtained in the step 1), removing nano activated carbon and ammonium polyacrylate, allowing the bamboo heat treatment waste liquid to flow into a first treatment room, adding a nitrous acid solution and a phosphoric acid solution, introducing inert gas, and adjusting the pH value of the bamboo heat treatment waste liquid to 4.5;
3) allowing the bamboo heat treatment waste liquid subjected to acid treatment in the step 2) to flow into a second treatment room, adding a sodium hydroxide solution and a sodium bicarbonate solution, and adjusting the pH value of the bamboo heat treatment waste liquid to 9.0;
4) allowing the bamboo heat treatment waste liquid subjected to alkali treatment in the step 3) to flow into a third treatment room, and adding a purifying liquid, wherein the purifying liquid comprises the following raw materials: 4% of sodium hyaluronate, 3% of dipropylene glycol, 10% of trehalose, 18% of hydroxyethyl cellulose, 20% of sodium thiosulfate, 5% of dipotassium glycyrrhizinate and the balance of deionized water;
5) and (3) allowing the bamboo heat treatment waste liquid purified in the step 4) to flow into a fourth treatment room, filtering by a hollow fiber ultrafiltration membrane with the filter diameter of 0.05 micron, controlling the temperature at 38 ℃, checking that the water quality is qualified and the water can be discharged after the completion, and otherwise, repeating the steps 2), 3) and 4).
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A method for treating waste liquid generated in heat treatment of bamboo wood is characterized by comprising the following steps:
1) intercepting impurities in the bamboo heat treatment waste liquid through a grating, adding an adsorbent into the bamboo heat treatment waste liquid, wherein the addition amount of the adsorbent is 50-80% of that of the bamboo heat treatment waste liquid, stirring at a constant speed for 40-50h, and controlling the stirring speed to be 200-300 revolutions per minute;
2) filtering the bamboo heat treatment waste liquid obtained in the step 1), removing the adsorbent, allowing the bamboo heat treatment waste liquid to flow into a first treatment room, adding an acid solution into the first treatment room, introducing inert gas into the first treatment room, and adjusting the pH value of the bamboo heat treatment waste liquid to 4.2-5.5;
3) allowing the bamboo heat treatment waste liquid subjected to acid treatment in the step 2) to flow into a second treatment room, adding an alkali solution, and adjusting the pH value of the bamboo heat treatment waste liquid to 8.5-9.2;
4) allowing the bamboo heat treatment waste liquid subjected to alkali treatment in the step 3) to flow into a third treatment room, and adding a purifying liquid, wherein the purifying liquid comprises the following raw materials: 3-5% of sodium hyaluronate, 2-4% of dipropylene glycol, 7-12% of trehalose, 15-20% of hydroxyethyl cellulose, 15-25% of sodium thiosulfate, 4-5% of dipotassium glycyrrhizinate and the balance of deionized water;
5) and (3) allowing the bamboo heat treatment waste liquid purified in the step 4) to flow into a fourth treatment room, filtering by using a hollow fiber ultrafiltration membrane, inspecting the qualified water quality and discharging, and otherwise, repeating the steps 2), 3) and 4).
2. The method for treating the bamboo heat treatment waste liquid as claimed in claim 1, wherein the adsorbent in the step 1) is zeolite molecular sieve, nano activated carbon, alumina powder or ammonium polyacrylate.
3. The method for treating the bamboo wood heat treatment waste liquid according to claim 1, wherein the acid solution in the step 2) is one or more of a dilute hydrochloric acid solution, a sulfurous acid solution, a nitrous acid solution, a phosphoric acid solution and carbonic acid.
4. The method for treating the bamboo wood heat treatment waste liquid as claimed in claim 1, wherein the alkali solution in the step 3) is one or more of a sodium hydroxide solution, a sodium bicarbonate solution, a sodium carbonate solution or ammonia water.
5. The method for treating the bamboo wood heat treatment waste liquid as claimed in claim 1, wherein the purifying liquid is prepared from the following raw materials: 4% of sodium hyaluronate, 3% of dipropylene glycol, 10% of trehalose, 18% of hydroxyethyl cellulose, 20% of sodium thiosulfate, 5% of dipotassium glycyrrhizinate and the balance of deionized water.
6. The method for treating the bamboo wood heat treatment waste liquid as claimed in claim 1, wherein the filtering diameter of the hollow fiber ultrafiltration membrane is 0.01-0.1 micron, and the filtering temperature is controlled at 35-40 ℃.
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