CN111908740A - Method for treating wall imitation stone coating wastewater - Google Patents
Method for treating wall imitation stone coating wastewater Download PDFInfo
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- CN111908740A CN111908740A CN202010925318.6A CN202010925318A CN111908740A CN 111908740 A CN111908740 A CN 111908740A CN 202010925318 A CN202010925318 A CN 202010925318A CN 111908740 A CN111908740 A CN 111908740A
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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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
- C02F1/52—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
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
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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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5281—Installations for water purification using chemical agents
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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
- C02F1/52—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
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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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
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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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/14—Paint wastes
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/14—NH3-N
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
Abstract
The invention provides a wall body imitation stone coating wastewater treatment method which comprises the working procedures of plate-and-frame filter pressing, flocculation precipitation, hydrolytic acidification, UASB anaerobic reaction, contact oxidation, ozone oxidation and an aeration biological filter. The route of the method adopts a physicochemical, biochemical and advanced treatment method, and compared with the traditional flocculation precipitation method for treating the wall imitation stone coating wastewater, the method does not produce dangerous waste, does not produce secondary pollution, and has obvious environmental protection benefit.
Description
Technical Field
The invention relates to the field of wall imitation stone paint wastewater treatment, in particular to a wall imitation stone paint wastewater treatment method.
Background
In recent years, with the rapid development of the real estate industry, the usage amount of the wall imitation stone paint is gradually increased. The wall imitation stone paint is a paint exactly like marble and granite, and the paint has the characteristics of water resistance, fire resistance, no toxicity, acid and alkali resistance, strong oxidation resistance and the like, is fully utilized in the decoration of modern external walls, and gradually replaces the traditional stones such as marble and granite.
The wall imitation stone paint wastewater belongs to high-organic matter and high-suspended matter wastewater, the wastewater contains raw materials such as cellulose, a plasticizer, a thickening agent, a film forming additive, an emulsion and the like, the wastewater is directly discharged into the natural environment without being treated to cause serious damage to the natural environment, and how to effectively treat the wastewater becomes the important factor for the development of the industry. With the increase of the global dosage of the wall imitation stone paint, professional environmental protection personnel have begun to explore a treatment method of wall imitation stone paint wastewater to reduce the influence of the wastewater on the surrounding environment.
The existing commonly used wall imitation stone paint wastewater treatment process mainly comprises an incineration process, a wet catalytic oxidation process, a flocculation precipitation process, a biochemical process, an evaporation process and the like. Although the processes are widely applied and popularized, the processes have the defects of high operation cost, low treatment efficiency, high investment and the like. With the continuous improvement of the environmental protection requirement, how to economically and efficiently realize the wastewater discharge to reach the standard becomes the central importance of the industry development.
Disclosure of Invention
The invention aims to overcome the defects of the traditional technology and provides a method for treating the wall imitation stone coating wastewater.
The aim of the invention is achieved by the following technical measures:
a method for treating wall imitation stone paint wastewater comprises the following steps:
s1, filtering the wall stone-like coating wastewater, feeding the filtered wastewater into a wastewater collection pool, and recovering solids;
s2, discharging the sewage in the wastewater collection tank into a flocculation sedimentation tank in a metering manner, adding polyaluminium chloride and cationic polyacrylamide into the flocculation sedimentation tank, and precipitating suspended matters in the wastewater;
s3, discharging the supernatant after precipitation into a hydrolysis acidification pool, and performing a hydrolysis acidification process, wherein the hydrolysis acidification retention time is 12-18 h, the dissolved oxygen is 0.2-0.4 mg/L, and the hydrolysis acidification volume load is 0.08-0.10 kg/(m/L)3d)；
S4, after the hydrolytic acidification treatment is finished,the wastewater enters a UASB anaerobic reactor for treatment, and the volume load is 2.8-3.0 kg/(m)3d)；
S5, discharging the wastewater treated by the UASB anaerobic reactor into a contact oxidation tank, and consuming organic matters in the wastewater by microorganisms in the contact oxidation tank;
s6, the wastewater treated by the contact oxidation pond enters an ozone catalytic oxidation pond, and organic matters in the wastewater are oxidized into carbon dioxide and water through the oxidation action of ozone molecules;
s7, the waste gas after ozone oxidation automatically flows into the biological aerated filter, and the organic matters in the waste water are reduced to below 50mg/L under the action of microorganisms in the biological aerated filter.
Further, in step S1, the water content of the filtered wastewater is not less than 80%.
Further, in step S2, the addition amount of polyaluminum chloride is 10-30 mg/L, the addition amount of cationic polyacrylamide is 1.0-3.0 mg/L, and the surface load of the flocculation sedimentation tank is 0.2-0.6 m3/m2h。
Further, in step S4, the UASB control temperature is 28-38 ℃.
Further, in step S4, methane gas generated by the UASB anaerobic reactor is sent to a boiler room to be burned as fuel, and a water seal and a flame arrester are provided before methane enters the boiler to prevent backfire; alternatively, in step S4, the methane gas generated by the UASB anaerobic reactor is discharged to the air after passing through the purification device.
Further, in step S5, the dissolved oxygen in the contact oxidation pond is 2.5-3.2 mg/L, and the sludge volume load is 1.0-1.5.0 kgBOD 5/(m)3D), 25% -32% of SV30 and 3000-4000 mg/L of MLSS.
Further, in step S6, the ozone generator has an ozone concentration of 50-60 mg/L and a molar ratio of the ozone concentration to the organic matter of 3.0-4.0: 1.
Further, in step S7, the volume of the filter material in the biological aerated filter accounts for 1/3-1/2 of the total filter body, the dissolved oxygen concentration is 4.0-5.0 mg/L, and the flow rate of the filter cap is 0.3 t/h-0.4 t/h.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the advantages that:
(1) the invention recycles the wall imitation stone coating material in the wastewater, recycles the wall imitation stone coating material, improves the material conversion rate of production and saves resources.
(2) The route of the method adopts a physicochemical, biochemical and advanced treatment method, and compared with the traditional flocculation precipitation method for treating the wall imitation stone coating wastewater, the method does not produce dangerous waste, does not produce secondary pollution and has obvious environmental protection benefit.
(3) All unit treatment methods are easy to realize industrial production, a simple treatment method is adopted to obtain a better wastewater treatment result aiming at the wall stone-like coating wastewater, and the technology is convenient for industrial application and popularization.
(4) The technology can effectively solve the problem that the wall stone imitation coating wastewater does not reach the standard, and the treated wastewater can meet the requirement of direct discharge in the Integrated wastewater discharge Standard.
(5) The method has the advantages of low wastewater treatment cost, capability of recovering materials, reduction in production cost, simple operation, stable operation effect, low investment and remarkable economic benefit.
The invention is further described with reference to the following figures and detailed description.
Drawings
FIG. 1 is a flow diagram of a processing method in one embodiment of the invention.
Detailed Description
As shown in fig. 1, an embodiment of the present invention provides a method for treating wastewater containing wall artificial stone paint, which comprises the following steps of plate-and-frame filter pressing, flocculation precipitation, hydrolysis acidification, UASB anaerobic reaction, contact oxidation, ozone oxidation, and biological aerated filter, specifically:
s1, pumping the wall imitation stone coating wastewater into a plate-and-frame filter press through a screw pump, wherein the pressure of the plate-and-frame filter press is set to be 420-600 Kpa, and the plate-and-frame filter press period is 36-48 h. And (3) recycling the mud cake discharged by plate-and-frame filter pressing to a workshop, and enabling sewage to enter a wastewater collecting tank, wherein the material recovery rate reaches 10-12%. Wherein, preferably, the water content of the mud cake is less than 80 percent, if not less than 80 percent, the filter pressing time of the plate-and-frame filter press is continuously increased until the water content is less than or equal to 80 percent.
S2, pumping the wastewater after filter pressing in the collecting tank into a flocculation sedimentation tank by using a metering pump, and precipitating suspended matters in the wastewater by adding polyaluminum chloride and cationic polyacrylamide, wherein the addition amount of the polyaluminum chloride is 10-30 mg/L, and the addition amount of the cationic polyacrylamide is 1.0-3.0 mg/L. The surface load of the flocculation sedimentation tank is 0.2-0.6 m3/m2H, enabling the supernatant after precipitation to automatically flow into a hydrolysis acidification pool for further biochemical treatment.
S3, the B/C value in the wastewater is greatly improved through the hydrolysis acidification effect, and a foundation is laid for subsequent anaerobism and sample preparation. The hydrolytic acidification residence time is 12 to 18 hours, the dissolved oxygen is 0.2 to 0.4mg/L, and the hydrolytic acidification volume load is 0.08 to 0.10 kg/(m)3.d)。
And S4, after the hydrolytic acidification treatment is finished, the wastewater enters a UASB anaerobic reactor for treatment, and organic matters in the wastewater are effectively degraded under the action of methanogens in the UASB. Wherein the UASB temperature is controlled to be 28-38 ℃, the residence time is 24-36 h, and the volume load is 2.8-3.0 kg/(m)3D). Anaerobic sludge generated by UASB is sent to an organic fertilizer factory to produce organic fertilizer, and generated biogas is sent to a boiler room to assist coal combustion. Wherein, preferably, before the methane gas generated by UASB enters the boiler, a water seal and two flame arresters are arranged to prevent backfire. If no boiler is arranged in the plant area, the waste gas can be directly discharged at high altitude through a set of water seal, and the discharged waste gas reaches the integrated emission standard of atmospheric pollutants.
And S5, enabling the wastewater treated by the UASB to automatically flow into a contact oxidation pond, and consuming the organic matters in the wastewater through the action of aerobic microorganisms. Wherein the dissolved oxygen of the contact oxidation pond is 2.5-3.2 mg/L, the sludge volume load is 1.0-1.5.0 kgBOD 5/(m)3D), 25% -32% of SV30 and 3000-4000 mg/L of MLSS.
S6, the wastewater treated by the contact oxidation pond enters an ozone catalytic oxidation pond, and organic matters in the wastewater are oxidized into carbon dioxide and water through the oxidation action of ozone molecules, so that the content of the organic matters in the wastewater is reduced. Wherein the ozone concentration of the ozone generator is 50-60 mg/L, and the molar ratio of the ozone concentration to the organic matters is 3.0-4.0: 1. Unreacted ozone is destroyed by an ozone destruction device.
S7, the waste gas after ozone oxidation automatically flows into the biological aerated filter, and the organic matters in the waste water are reduced to below 50mg/L under the action of microorganisms in the biological aerated filter. Wherein the volume of the filter material in the biological aerated filter accounts for 1/3-1/2 of the total filter body, and the concentration of dissolved oxygen is 4.0-5.0 mg/L. The flow rate of the filter cap is 0.3 t/h-0.4 t/h. The treated wastewater meets the direct discharge requirement in the Integrated wastewater discharge Standard, wherein the characteristic pollutant CODcr is less than or equal to 50mg/L, and the ammonia nitrogen is less than or equal to 5 mg/L.
Claims (8)
1. A method for treating wall imitation stone paint wastewater, which is characterized in that,
the method comprises the following steps:
s1, filtering the wall stone-like coating wastewater, feeding the filtered wastewater into a wastewater collection pool, and recovering solids;
s2, discharging the sewage in the wastewater collection tank into a flocculation sedimentation tank in a metering manner, adding polyaluminium chloride and cationic polyacrylamide into the flocculation sedimentation tank, and precipitating suspended matters in the wastewater;
s3, discharging the supernatant after precipitation into a hydrolysis acidification pool, and performing a hydrolysis acidification process, wherein the hydrolysis acidification retention time is 12-18 h, the dissolved oxygen is 0.2-0.4 mg/L, and the hydrolysis acidification volume load is 0.08-0.10 kg/(m/L)3d)；
S4, after the hydrolytic acidification treatment is finished, the wastewater enters a UASB anaerobic reactor for treatment, and the volume load is 2.8-3.0 kg/(m)3d)；
S5, discharging the wastewater treated by the UASB anaerobic reactor into a contact oxidation tank, and consuming organic matters in the wastewater by microorganisms in the contact oxidation tank;
s6, the wastewater treated by the contact oxidation pond enters an ozone catalytic oxidation pond, and organic matters in the wastewater are oxidized into carbon dioxide and water through the oxidation action of ozone molecules;
s7, the waste gas after ozone oxidation automatically flows into the biological aerated filter, and the organic matters in the waste water are reduced to below 50mg/L under the action of microorganisms in the biological aerated filter.
2. The method for treating the wastewater of the wall imitation stone coating according to claim 1, characterized in that:
in step S1, the water content of the filtered wastewater is not less than 80%.
3. The method for treating the wastewater of the wall imitation stone coating according to claim 1, characterized in that:
in step S2, the addition amount of the polyaluminum chloride is 10-30 mg/L, the addition amount of the cationic polyacrylamide is 1.0-3.0 mg/L, and the surface load of the flocculation sedimentation tank is 0.2-0.6 m3/m2·h。
4. The method for treating the wastewater of the wall imitation stone coating according to claim 1, characterized in that:
in step S4, the UASB control temperature is 28-38 ℃.
5. The method for treating the wastewater of the wall imitation stone paint according to claim 4, characterized in that:
in the step S4, methane gas generated by the UASB anaerobic reactor is sent to a boiler room to be used as fuel for combustion, and a water seal and a flame arrester are arranged before the methane enters the boiler to prevent backfire; or
In step S4, the methane gas generated by the UASB anaerobic reactor is discharged to the air after passing through the purification device.
6. The method for treating the wastewater of the wall imitation stone coating according to claim 1, characterized in that:
in step S5, the dissolved oxygen in the contact oxidation pond is 2.5-3.2 mg/L, and the sludge volume load is 1.0-1.5.0 kgBOD 5/(m)3D), 25% -32% of SV30 and 3000-4000 mg/L of MLSS.
7. The method for treating the wastewater of the wall imitation stone coating according to claim 1, characterized in that:
in step S6, the ozone concentration of the ozone generator is 50-60 mg/L, and the molar ratio of the ozone concentration to the organic matter is 3.0-4.0: 1.
8. The method for treating the wastewater of the wall imitation stone coating according to claim 1, characterized in that:
in step S7, the volume ratio of the filter material in the biological aerated filter to the total filter body is 1/3-1/2, the dissolved oxygen concentration is 4.0-5.0 mg/L, and the flow rate of the filter cap is 0.3 t/h-0.4 t/h.
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| CN202010925318.6A CN111908740A (en) | 2020-09-06 | 2020-09-06 | Method for treating wall imitation stone coating wastewater |
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| CN202010925318.6A CN111908740A (en) | 2020-09-06 | 2020-09-06 | Method for treating wall imitation stone coating wastewater |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109422412A (en) * | 2017-08-16 | 2019-03-05 | 天津科技大学 | A kind of Integrated Processing Unit of coating waste-water and sanitary sewage |
| WO2019053750A1 (en) * | 2017-09-15 | 2019-03-21 | Lifdisill Ehf. | Integrated waste conversion system and method |
| CN109851161A (en) * | 2019-01-17 | 2019-06-07 | 南京中工智泓环保产业发展有限公司 | Produce the processing method of biphenyl-benzyl dichloride and the produced sewage of ortho-sulfonic acid sodium benzaldehyde |
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- 2020-09-06 CN CN202010925318.6A patent/CN111908740A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109422412A (en) * | 2017-08-16 | 2019-03-05 | 天津科技大学 | A kind of Integrated Processing Unit of coating waste-water and sanitary sewage |
| WO2019053750A1 (en) * | 2017-09-15 | 2019-03-21 | Lifdisill Ehf. | Integrated waste conversion system and method |
| CN109851161A (en) * | 2019-01-17 | 2019-06-07 | 南京中工智泓环保产业发展有限公司 | Produce the processing method of biphenyl-benzyl dichloride and the produced sewage of ortho-sulfonic acid sodium benzaldehyde |
Non-Patent Citations (1)
| Title |
|---|
| 张传兵等: ""高浓度难降解发酵类制药废水无害化处理及应用"", 《再生资源与循环经济》 * |
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Application publication date: 20201110 |