CN116161832B - Hydrogen production system containing high-concentration organic industrial wastewater - Google Patents
Hydrogen production system containing high-concentration organic industrial wastewater Download PDFInfo
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- CN116161832B CN116161832B CN202310449738.5A CN202310449738A CN116161832B CN 116161832 B CN116161832 B CN 116161832B CN 202310449738 A CN202310449738 A CN 202310449738A CN 116161832 B CN116161832 B CN 116161832B
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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
- C02F11/00—Treatment of sludge; Devices therefor
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
- C02F11/04—Anaerobic treatment; Production of methane by such processes
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P3/00—Preparation of elements or inorganic compounds except carbon dioxide
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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
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
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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
- C02F1/44—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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
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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
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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
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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
- C02F2001/007—Processes including a sedimentation step
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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 belongs to the field of wastewater treatment, and particularly discloses a hydrogen production system containing high-concentration organic industrial wastewater, which comprises an ultrafiltration device, a first mixing tank, a first sedimentation device, a filter pressing device, a second mixing tank, a third mixing tank, a second sedimentation device, a biochemical device, a sludge collection tank, a sludge acidification tank, a buffer tank and a hydrogen production fermentation tank which are sequentially arranged.
Description
Technical Field
The invention relates to a wastewater treatment process, in particular to a hydrogen production system containing high-concentration organic industrial wastewater.
Background
The PCB ink wastewater is a high-concentration organic wastewater, and CODcr is usually 5000-10000mg/L, and some of the wastewater can reach 20000mg/L. The water-based ink is prepared by combining water-soluble polymer resin, pigment, solvent and related auxiliary agents through a physical and chemical process, and the water-based ink wastewater mainly comes from equipment cleaning water in the printing process. Because the chemical components of the water-based ink wastewater are complex, the water-based ink wastewater has the characteristics of high chemical oxygen demand, high chromaticity, difficult biodegradation and the like, and once the water-based ink wastewater enters a water body, serious pollution is caused to the water environment. And the water quality difference of the wastewater is larger due to the different varieties, raw material properties and production processes of the water-based ink, so that the treatment difficulty is higher and the operation cost of wastewater treatment is higher. CN104944692a discloses a method for treating water-based ink wastewater, which adopts an acid precipitation coagulation precipitation-biodegradation combined process to treat water-based ink wastewater, and the selected ferric trichloride and polyacrylamide have wide application range, can rapidly form flocs and settle under acidic conditions, and has stable treatment process and easy control. CN109809615a discloses a PCB wastewater treatment process, which adopts the treatment processes of electric flocculation, air floatation and the like for the first wastewater, the second wastewater, the third wastewater and the fourth wastewater, so that a better treatment effect is obtained. However, in the above treatment process, the characteristics of different waste water generated in the PCB production process are not utilized to treat the waste with the waste, if the different waste water can be treated with pertinence, and the treatment cost and treatment effect of the waste water can be greatly reduced by utilizing the characteristics of various waste water, and if the renewable energy source can be generated in the treatment process, the important waste utilization mode is also realized.
Therefore, how to efficiently treat the high-concentration wastewater with different water quality characteristics in the PCB production wastewater becomes the current urgent problem to be solved.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art.
Disclosure of Invention
The invention aims to provide a hydrogen production system containing high-concentration organic industrial wastewater, which utilizes the characteristics of different water qualities in the PCB wastewater to comprehensively treat, and can be used for efficiently treating the PCB high-concentration organic wastewater and simultaneously obtaining hydrogen to achieve the purpose of treating waste by waste.
In order to achieve the above purpose, the embodiment of the invention provides a hydrogen production system containing high-concentration organic industrial wastewater, which comprises an ultrafiltration device 1, a first mixing tank 2, a first sedimentation device 3, a filter pressing device 4, a second mixing tank 5, a third mixing tank 6, a second sedimentation device 7, a biochemical device 8, a sludge collecting tank 9, a sludge acidification tank 10, a buffer tank 11 and a hydrogen production fermentation tank 16 which are sequentially arranged; the ultrafiltration device 1 is provided with an ink wastewater inlet pipe 1-1 and a concentrated solution discharge pipe 1-2, the concentrated solution discharge pipe 1-2 is communicated with the first mixing tank 2, the first mixing tank 2 is provided with an acid wastewater inlet pipe 2-2, mixed solution generated by the first mixing tank 2 is conveyed to a first sedimentation device 3, the first sedimentation device 3 is provided with a dried sludge feeding port, the bottom of the first sedimentation device 3 is provided with a conical collecting tank, the collecting tank is communicated with the filter pressing device 4, sludge discharged by the filter pressing device 4 is conveyed to the second mixing tank 5 after being crushed, the second mixing tank 5 is provided with an alkaline water inlet pipe 5-1, the second mixing tank 5 is provided with a water outlet weir, the water outlet weir is communicated with the third mixing tank 6, the mixture in the third mixing tank 6 is conveyed to the second sedimentation device 7, and supernatant of the second sedimentation device 7 is conveyed to the biochemical device 8; the biochemical device 8 is provided with an excess sludge discharge pipe which is communicated with the sludge collecting tank 9, sludge in the sludge collecting tank 9 is conveyed to the sludge acidification tank 10 after being subjected to homogenization and wall breaking treatment, the sludge in the sludge acidification tank 10 is conveyed to the buffer tank 11 after being subjected to anaerobic acidification, and the buffer tank 11 is communicated with the hydrogen production fermentation tank 16; a sludge high-temperature cracking device and a dehydration device are arranged between the buffer tank 11 and the hydrogen production fermentation tank 16;
in one or more embodiments of the present invention, the device further comprises a nanofiltration device 13, the nanofiltration device 13 is provided with a heavy metal waste water pipe 13-1, a concentrated water pipe of the nanofiltration device 13 is communicated with an ion exchange device 14, and a water outlet of the ion exchange device 14 is communicated with the ink waste water inlet pipe 1-1;
in one or more embodiments of the present invention, the sludge treatment device further comprises an incinerator 12, the second mixing tank 5 is communicated with the incinerator 12, and sludge in the second mixing tank 5 is incinerated after filter pressing treatment;
in one or more embodiments of the present invention, the apparatus further comprises a micro-electrolysis device 15, the supernatant of the first sedimentation device 3 is delivered to the micro-electrolysis device 15, and a water outlet of the micro-electrolysis device 15 is communicated with the third mixing tank 6;
in one or more embodiments of the present invention, the water outlet on the ultrafiltration device 1 communicates with the micro-electrolysis device 15;
in one or more embodiments of the invention, the biochemical apparatus includes an anaerobic process, an aerobic process, and an MBR process;
in one or more embodiments of the present invention, the addition amount of the dried sludge added to the first sedimentation device 3 is 20-40g/L;
in one or more embodiments of the present invention, the water outlet in the buffer tank 11 is connected to the mixing tank 1 and 2;
in one or more embodiments of the present invention, the amount of the wastewater fed into the first mixing tank 2 from the acidic wastewater inlet pipe 2-2 and the effluent from the buffer tank 11 is determined by the pH in the first mixing tank 2, and the pH is adjusted to 3.5-4.5;
in one or more embodiments of the present invention, a strongly acidic ion exchange resin is used in the ion exchange device;
in one or more embodiments of the present invention, the high concentration organic industrial wastewater is printed wiring board wastewater;
in one or more embodiments of the present invention, the wastewater containing heavy metals in the high concentration organic industrial wastewater is subjected to a vein breaking and security filtering treatment before entering the heavy metal wastewater pipe 13-1;
in one or more embodiments of the invention, the ion exchange device 14 is provided with a regeneration liquid outlet which communicates with the concentrate discharge pipe 1-2;
compared with the prior art, the embodiment of the invention has the following advantages:
(1) The method comprises the steps that waste water which is difficult to treat by ink waste water in the waste water of the printed circuit board is utilized, different types of waste water quality in the waste water of the printed circuit board is utilized, the pH adjustment of the ink waste water is realized by utilizing the acidizing process of hydrogen ions, acid waste water and surplus sludge in the waste water after heavy metal waste water ion exchange, so that the ink forms colloidal aggregates, and meanwhile, the dried sludge and the colloidal aggregates are mixed to form sedimentation treatment;
(2) The sludge generated by the filter pressing device is crushed and then mixed with the alkaline wastewater, wherein the crushed sludge is acid sludge, the pH value of the alkaline wastewater is reduced, and the pH value of the crushed sludge is improved, so that the incineration efficiency of the crushed sludge is higher in the incineration treatment process;
(3) After the printing ink wastewater is filtered and the supernatant fluid of the first sedimentation device is added into the micro-electrolysis device, the pH value of the mixed wastewater is reduced, so that the treatment effect of the iron-carbon process is greatly improved, and meanwhile, the pH value is not required to be adjusted by using acid;
(4) In the mixing process of the effluent of the micro-electrolysis device and the effluent of the mixing tank II, the alkaline wastewater and iron ions contained in the iron-carbon process can form sedimentation to further reduce suspended particles in the wastewater, and meanwhile, acid and alkali are neutralized, so that the effluent meets the requirements of the biochemical treatment process;
(5) The sludge acidizing tank is utilized to acidify the cracked sludge, the sludge is conveyed to the buffer tank, the supernatant is conveyed to the mixing tank to adjust the pH value of the printing ink wastewater, and the bottom material is conveyed to the hydrogen production fermentation tank to ferment and produce hydrogen to obtain biological energy;
(6) And after the sludge is dehydrated and broken at high temperature, the pH value of the sludge is 5-6, and the pH value is suitable for hydrogen production reaction.
Drawings
FIG. 1 is a schematic diagram of a hydrogen production system containing high concentration organic industrial wastewater according to an embodiment of the present invention;
Detailed Description
The following detailed description of embodiments of the invention is, therefore, to be taken in conjunction with the accompanying drawings, and it is to be understood that the scope of the invention is not limited to the specific embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the term "comprise" or variations thereof such as "comprises" or "comprising", etc. will be understood to include the stated element or component without excluding other elements or components.
Example 1
As shown in fig. 1, the hydrogen production system containing high-concentration organic industrial wastewater according to the preferred embodiment of the invention comprises an ultrafiltration device 1, a first mixing tank 2, a first sedimentation device 3, a filter pressing device 4, a second mixing tank 5, a third mixing tank 6, a second sedimentation device 7, a biochemical device 8, a sludge collecting tank 9, a sludge acidification tank 10, a buffer tank 11 and a hydrogen production fermentation tank 16 which are sequentially arranged; the ultrafiltration device 1 is provided with an ink wastewater inlet pipe 1-1 and a concentrated solution discharge pipe 1-2, the concentrated solution discharge pipe 1-2 is communicated with the first mixing tank 2, the first mixing tank 2 is provided with an acid wastewater inlet pipe 2-2, mixed solution generated by the first mixing tank 2 is conveyed to a first sedimentation device 3, the first sedimentation device 3 is provided with a dried sludge feeding port, the bottom of the first sedimentation device 3 is provided with a conical collecting tank, the collecting tank is communicated with the filter pressing device 4, sludge discharged by the filter pressing device 4 is conveyed to the second mixing tank 5 after being crushed, the second mixing tank 5 is provided with an alkaline water inlet pipe 5-1, the second mixing tank 5 is provided with a water outlet weir, the water outlet weir is communicated with the third mixing tank 6, the mixture in the third mixing tank 6 is conveyed to the second sedimentation device 7, and supernatant of the second sedimentation device 7 is conveyed to the biochemical device 8; the biochemical device 8 is provided with an excess sludge discharge pipe which is communicated with the sludge collecting tank 9, sludge in the sludge collecting tank 9 is conveyed to the sludge acidification tank 10 after being subjected to homogenization and wall breaking treatment, the sludge in the sludge acidification tank 10 is conveyed to the buffer tank 11 after being subjected to anaerobic acidification, the buffer tank is communicated with the hydrogen production fermentation tank 16, and a sludge high-temperature cracking device and a dehydration device are arranged between the buffer tank 11 and the hydrogen production fermentation tank 16; the device also comprises a nanofiltration device 13, the nanofiltration device 13 is provided with a heavy metal waste pipe 13-1, a concentrated water pipe of the nanofiltration device 13 is communicated with an ion exchange device 14, a water outlet of the ion exchange device 14 is communicated with the ink wastewater inlet pipe 1-1, the device also comprises an incinerator 12, the second mixing tank 5 is communicated with the incinerator 12, the sludge in the second mixing tank 5 is incinerated after being subjected to filter pressing treatment, and the sludge treatment device further comprises a micro-electrolysis device 15, wherein the supernatant of the first sedimentation device 3 is conveyed to the micro-electrolysis device 15, a water outlet of the micro-electrolysis device 15 is communicated with the third mixing tank 6, and a water outlet of the ultrafiltration device 1 is communicated with the micro-electrolysis device 15; the biochemical device comprises an anaerobic process, an aerobic process and an MBR process, the addition amount of the dried sludge added to the first sedimentation device 3 is 20-40g/L, a water outlet in the buffer tank 11 is communicated with the first mixing tank 2, the amount of the wastewater added into the first mixing tank 2 by the acid wastewater inlet pipe 2-2 and the effluent of the buffer tank 11 is determined by the pH value in the first mixing tank 2, and the pH value is adjusted to 3.5-4.5; the temperature of the fermentation hydrogen production tank is controlled to be 39-45 ℃.
Wherein, the CODcr of the waste water of the ink waste water inlet pipe is 8900mg/L, the SS is 1050mg/L, the pH value is 8.4, and the water content of the discharged sludge of the filter pressing device is controlled to be 50-70 percent; the pH value in the first mixing tank is respectively controlled at 3.5, 3.7, 3.9, 4.0, 4.3 and 4.5, and the CODcr removal rate in the effluent of the first sedimentation device is respectively 34.5%, 41.2%, 43.4%, 40.8%, 36.9% and 32.1%, so that the treatment effect is best at the pH value of 3.9;
the CODcr of the effluent treated by the biochemical treatment process is 64mg/L, and ss is 2.3mg/L; the hydrogen yield of the hydrogen production fermentation tank is 64.3 percent.
Comparative example
The sludge acidification tank is omitted for acidification treatment of the surplus sludge, the sludge is directly subjected to high Wen Pojie and dehydration treatment, and hydrogen production fermentation is carried out in the manner of example 1, so that the hydrogen yield is only 51.2%.
Example 2
On the basis of example 1, a strongly acidic ion exchange resin was used in the ion exchange apparatus; the high-concentration organic industrial wastewater containing heavy metals is subjected to vein breaking and security filtering before entering the heavy metal wastewater pipe 13-1; the ion exchange device 14 is provided with a regeneration liquid outlet which is communicated with the concentrated liquid discharge pipe 1-2.
The foregoing descriptions of specific exemplary embodiments of the present invention are presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application to thereby enable one skilled in the art to make and utilize the invention in various exemplary embodiments and with various modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.
Claims (6)
1. The hydrogen production system for the organic industrial wastewater with the high concentration is characterized by comprising an ultrafiltration device (1), a first mixing tank (2), a first sedimentation device (3), a filter pressing device (4), a second mixing tank (5), a third mixing tank (6), a second sedimentation device (7), a biochemical device (8), a sludge collecting tank (9), a sludge acidification tank (10), a buffer tank (11) and a hydrogen production fermentation tank (16) which are sequentially arranged; an ink wastewater inlet pipe (1-1) and a concentrated solution discharge pipe (1-2) are arranged on the ultrafiltration device (1), the concentrated solution discharge pipe (1-2) is communicated with the first mixing tank (2), an acid wastewater inlet pipe (2-2) is arranged on the first mixing tank (2), mixed solution generated by the first mixing tank (2) is conveyed to the first sedimentation device (3), a dried sludge feeding port is arranged on the first sedimentation device (3), a conical collecting tank is arranged at the bottom of the first sedimentation device (3), the collecting tank is communicated with the filter pressing device (4), sludge discharged by the filter pressing device (4) is conveyed to the second mixing tank (5) after being crushed, an alkaline water inlet pipe (5-1) is arranged on the second mixing tank (5), an effluent weir is arranged on the second mixing tank (5), the effluent is communicated with the third mixing tank (6), the mixture in the third mixing tank (6) is conveyed to the second sedimentation device (7), and the supernatant in the second sedimentation device (7) is conveyed to the biochemical device (8); the biochemical device (8) is provided with an excess sludge discharge pipe, the excess sludge discharge pipe is communicated with the sludge collecting tank (9), sludge in the sludge collecting tank (9) is conveyed to the sludge acidification tank (10) after being homogenized and broken, the sludge in the sludge acidification tank (10) is conveyed to the buffer tank (11) after being subjected to anaerobic acidification, and the buffer tank (11) is communicated with the hydrogen production fermentation tank (16); a sludge high-temperature cracking device and a dehydration device are arranged between the buffer pool (11) and the hydrogen production fermentation tank (16); the device also comprises a nanofiltration device (13), wherein a heavy metal waste pipe (13-1) is arranged on the nanofiltration device (13), a concentrated water pipe of the nanofiltration device (13) is communicated with an ion exchange device (14), and a water outlet of the ion exchange device (14) is communicated with the ink waste water inlet pipe (1-1);
the device also comprises a micro-electrolysis device (15), wherein the supernatant liquid of the first sedimentation device (3) is conveyed to the micro-electrolysis device (15), and a water outlet of the micro-electrolysis device (15) is communicated with the third mixing tank (6); a water outlet on the ultrafiltration device (1) is communicated with the micro-electrolysis device (15); the sludge treatment device further comprises an incinerator (12), the second mixing tank (5) is communicated with the incinerator (12), and sludge in the second mixing tank (5) is incinerated after filter pressing treatment.
2. The system for producing hydrogen from high concentration organic industrial wastewater according to claim 1, wherein the biochemical means comprises anaerobic process, aerobic process and MBR process.
3. The hydrogen production system of high-concentration organic industrial wastewater according to claim 1, wherein the addition amount of the dried sludge added to the first sedimentation device (3) is 20-40g/L.
4. A system for producing hydrogen from organic industrial wastewater containing high concentration according to claim 1 and wherein the water outlet in said buffer tank (11) is connected to said first mixing tank (2).
5. A system for producing hydrogen from organic industrial wastewater containing high concentration as claimed in claim 4, wherein the amount of wastewater from said acidic wastewater inlet pipe (2-2) and said buffer tank (11) added to said first mixing tank (2) is determined by pH in said first mixing tank (2), and said pH is adjusted to 3.5-4.5.
6. A system for producing hydrogen from high concentration organic industrial wastewater according to claim 2, wherein the wastewater containing heavy metals in the high concentration organic industrial wastewater is subjected to a vein breaking and security filtering treatment before entering the heavy metal wastewater pipe (13-1).
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| CN115259432A (en) * | 2022-06-14 | 2022-11-01 | 广东泓耀环保工程有限公司 | Treatment method of PCB printing ink wastewater |
| CN115367969A (en) * | 2022-09-13 | 2022-11-22 | 武汉中测联环境技术有限公司 | High-concentration water-based ink wastewater treatment method and treatment system |
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