Treatment system for caffeine bulk drug wastewater
By introducing SRB desulfurization towers, anaerobic tanks and biological decarbonization tanks into the wastewater treatment system of caffeine raw materials, combined with intermittent aeration and anaerobic fixed bed technology, high-efficiency and low-consumption COD, total nitrogen and sulfuric acid are achieved. Root removal solves the problems of high energy consumption and poor pollution factor removal in the prior art.
Patent Information
- Application Number
- CN202421082064.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-17
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2034-05-17
AI Technical Summary
When treating caffeine-based raw material wastewater, the prior art consumes high energy, invests a lot, and it is difficult to effectively remove contaminants such as COD, ammonia nitrogen, and sulfate, resulting in high treatment costs and affecting product competitiveness.
The treatment system is adopted including SRB desulfurization tower, anaerobic tank, biodecarbonization tank, advection sedimentation tank, denitrification tank and nitrification tank. Through intermittent aeration, anaerobic fixed bed technology, biofilm technology and multi-stage denitrification treatment, Achieve efficient removal of COD, total nitrogen and sulfate.
It reduces energy consumption, improves treatment efficiency, significantly reduces sulfate pollution, extends the service life of the equipment, and meets the demand for increased wastewater treatment.
Smart Images
Figure CN222293854U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of wastewater treatment systems, and in particular relates to a treatment system for caffeine raw material medicine wastewater. Background Art
[0002] Caffeine (C8H 10 N4O2) is a central nervous system stimulant and is widely used as a beverage additive.
[0003] At present, caffeine API wastewater is generally treated by evaporation facilities because it is rich in sulfate, and the evaporated water enters the biochemical further treatment. However, evaporation facilities such as MVR will cause the problem of secondary mother liquor reuse. In view of the high concentration of COD, ammonia nitrogen, total nitrogen, sulfate and other pollution factors in the secondary mother liquor, strong oxidation solutions such as CWO oxidation are adopted, resulting in high energy consumption, large investment and other related problems. According to statistics, the cost of single water pretreatment of caffeine API wastewater exceeds 120 yuan / t, and the cost of further biochemical treatment reaches 15 yuan / t. The pressure of environmental protection treatment has seriously affected the competitiveness of products.
[0004] At present, there are few methods for treating caffeine API wastewater, mainly micro-electrolysis + ABR + SBR method and micro-electrolysis-SBR method. The micro-electrolysis process will produce a large amount of iron sludge sediment, causing secondary pollution.
[0005] Patent publication CN101781066A proposes a method for treating caffeine API wastewater, which includes first adjusting the pH in a regulating tank, then pre-treating in an iron-carbon-Fenton oxidation tank, continuing with flotation tank treatment, and then performing anaerobic hydrolysis acidification treatment, biological contact oxidation tank treatment, and hydrolysis multifunctional tank treatment in a UASB reactor; finally, performing high-efficiency activated sludge tank treatment and secondary sedimentation tank treatment to obtain drainage. Although the sludge is efficiently treated, it is still energy-consuming when applied to the treatment of wastewater with high nitrogen content and high COD of caffeine, and can only remove part of the COD and ammonia nitrogen, and has no effect on pollution factors such as sulfate. Utility Model Content
[0006] The technical problem to be solved by the utility model is to overcome the above-mentioned defects of the prior art, provide a treatment system for caffeine raw material drug wastewater, realize high-efficiency and low-energy separation, increase the service life of equipment parts, increase the wastewater treatment volume, and the COD and TN of the wastewater treatment meet the standards, and the sulfate radical can be greatly reduced.
[0007] The treatment system of caffeine raw material medicine wastewater described in the utility model includes an SRB desulfurization tower, an anaerobic tank, a biological decarbonization tank, a horizontal flow sedimentation tank, a denitrification tank A1, a nitrification tank O1, a denitrification tank A2, a nitrification tank O2, and a secondary sedimentation tank. The SRB desulfurization tower is connected to a regulating tank, and a metering pump is provided on the inlet of the regulating tank; the SRB desulfurization tower is connected to an anaerobic tank, the anaerobic tank is connected to a biological decarbonization tank, and the biological decarbonization tank is connected to a horizontal flow sedimentation tank. The horizontal flow sedimentation tank is connected to the denitrification tank A1, the denitrification tank A1 is connected to the nitrification tank O1, the nitrification tank O1 is connected to the denitrification tank A2, the denitrification tank A2 is connected to the nitrification tank O2, the nitrification tank O2 is connected to the secondary sedimentation tank, the secondary sedimentation tank is connected to the denitrification tank A1 through a nitrification liquid return pump, and the secondary sedimentation tank is connected to the denitrification tank A1 through a sludge return pump; the fan room is connected to the biological decarbonization tank, nitrification tank O1, and nitrification tank O2. The aerobic sludge in the biological decarbonization tank, nitrification tank O1, and nitrification tank O2 is kept in a suspended state through aeration in the fan room, thereby enhancing the organic carbon removal rate. The horizontal flow sedimentation tank exists in the form of a corridor behind the overflow weir. The horizontal flow sedimentation tank is connected to the biological decarbonization tank through a sludge pump to return the sludge deposited at the bottom to the biological decarbonization tank.
[0008] Preferably, the inlet of the metering pump is connected to the stripping residual liquid tank, the MVR distilled water and the waste water tank.
[0009] Preferably, the horizontal flow sedimentation tank is connected to the biological decarbonization tank via a sludge pump.
[0010] Preferably, an aeration pipe is provided inside the SRB desulfurization tower. The SRB desulfurization tower is intermittently aerated through the aeration pipe to blow off hydrogen sulfide in the water, reflux in a large proportion, and increase the rising speed.
[0011] Preferably, a three-phase separator is disposed outside the SRB desulfurization tower, and an internal reflux pump is disposed between the three-phase separator and the SRB desulfurization tower.
[0012] Preferably, a packing layer is provided inside the anaerobic tank, and the filling rate of the packing layer is 35%-45%. The anaerobic tank adopts the more mature anaerobic fixed bed technology, that is, fixed bed packing is used, and the free ball packing that occupies 40% of the tank volume is attached.
[0013] Preferably, an aeration disk is provided inside the biological decarbonation tank.
[0014] Preferably, a microporous aeration pipe O1 is provided inside the nitrification tank O1.
[0015] Preferably, a microporous aeration pipe O2 is provided inside the nitrification tank O2.
[0016] Preferably, the denitrification pool A1 is provided with a disperser A1 and a stirrer A1, and the denitrification pool A2 is provided with a disperser A2 and a stirrer A2. A carbon source addition port is provided on the pipeline between the disperser and the denitrification pool, and the disperser can be used to add a high-quality carbon source. A stirrer is provided inside the denitrification pool for stirring.
[0017] The treatment system of caffeine raw material medicine wastewater described in the utility model, when working, the wastewater of the stripping residual liquid tank, the MVR distilled water and the wastewater tank is used for water distribution at a ratio of 1:4 through a metering pump, enters the regulating tank for mixing, and then continues to enter the SRB desulfurization tower, adopts the construction mode of UASB, refluxes in a large proportion, improves the rising speed, and adds intermittent aeration twice a day, 5 minutes each time, for blowing off hydrogen sulfide in the water, and then continues to enter the anaerobic tank through the relatively mature anaerobic fixed bed technology, that is, fixed bed fillers are used, and free ball fillers accounting for 40% of the tank volume are attached. After treatment, it continues to enter the biological decarbonization tank and the horizontal flow sedimentation tank for separate treatment, and then is treated through the mode of denitrification tank A1+nitrification tank O1+denitrification tank A2+nitrification tank O2. The existing residence time of the two-stage denitrification is about 2.6d. The modified nitrification tank O1 is an MBBR process, and its biofilm technology has a long microbial residence time, which is more suitable for the survival of nitrifying bacteria, so the nitrification load can meet the requirements. The BOD / TN ratio of denitrification tank A1 and denitrification tank A2 is 5:1. Finally, it is discharged after passing through the secondary sedimentation tank.
[0018] Compared with the prior art, the utility model has the following beneficial effects:
[0019] The treatment system of caffeine raw material wastewater of the utility model has achieved significant effects in COD removal and sulfate removal through the adjustment of the SRB desulfurization tower and other equipment. Through the mode of denitrification tank A1+nitrification tank O1+denitrification tank A2+nitrification tank O2, significant effects in total nitrogen removal are achieved. The whole system has improved the impact load resistance, reduced energy consumption and saved costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 This is a schematic diagram of a treatment system for caffeine raw material pharmaceutical wastewater according to the utility model.
[0021] In the figure: 1. Stripping residual liquid tank; 2. MVR distilled water and wastewater tank; 3. Sludge pump; 4. Metering pump; 5. Equalization tank; 6. SRB desulfurization tower; 7. Three-phase separator; 8. Internal reflux pump; 9. Aeration pipe; 10. Anaerobic tank; 11. Biological decarbonization tank; 12. Horizontal sedimentation tank; 13. Denitrification tank A1; 14. Nitrification tank O1; 15. Denitrification tank A2; 16. Nitrification tank O2; 17. Secondary sedimentation tank; 18. Nitrification liquid reflux pump; 19. Sludge reflux pump; 20. Fan room; 21. Microporous aeration pipe O1; 22. Microporous aeration pipe O2; 23. Aeration plate; 24. Packing layer; 25. Disperser A1; 26. Agitator A1; 27. Disperser A2; 28. Agitator A2. DETAILED DESCRIPTION
[0022] The utility model is further described below in conjunction with specific embodiments.
[0023] like Figure 1 The treatment system of caffeine raw material wastewater includes an SRB desulfurization tower 6, an anaerobic tank 10, a biological decarbonization tank 11, a horizontal flow sedimentation tank 12, a denitrification tank A113, a nitrification tank O114, a denitrification tank A215, a nitrification tank O216, and a secondary sedimentation tank 17. The SRB desulfurization tower 6 is connected to the regulating tank 5, and a metering pump 4 is provided on the inlet of the regulating tank 5; the SRB desulfurization tower 6 is connected to the anaerobic tank 10, the anaerobic tank 10 is connected to the biological decarbonization tank 11, the biological decarbonization tank 11 is connected to the horizontal flow sedimentation tank 12, and the horizontal flow sedimentation Pool 12 is connected to denitrification pool A113, denitrification pool A113 is connected to nitrification pool O114, nitrification pool O114 is connected to denitrification pool A215, denitrification pool A215 is connected to nitrification pool O216, nitrification pool O216 is connected to secondary sedimentation pool 17, secondary sedimentation pool 17 is connected to denitrification pool A113 through nitrification liquid return pump 18, secondary sedimentation pool 17 is connected to denitrification pool A113 through sludge return pump 19; fan room 20 is connected to biological decarbonization pool 11, nitrification pool O114, nitrification pool O216. Aeration through fan room 20 keeps aerobic sludge in biological decarbonization pool 11, nitrification pool O114, nitrification pool O216 in a suspended state, thereby enhancing the organic carbon removal rate. Horizontal sedimentation pool 12 exists in the form of a corridor behind the overflow weir. The horizontal flow sedimentation tank 12 is connected to the biological decarbonization tank 11 through the sludge pump 3 to pump the sludge deposited at the bottom back to the biological decarbonization tank 11 .
[0024] The inlet of the metering pump 4 is connected to the stripping residual liquid tank 1, the MVR distilled water and the waste water tank 2.
[0025] The SRB desulfurization tower 6 is provided with an aeration pipe 9. The SRB desulfurization tower 6 is intermittently aerated through the aeration pipe 9 to blow off hydrogen sulfide in the water, reflux in a large proportion, and increase the rising speed.
[0026] A three-phase separator 7 is disposed outside the SRB desulfurization tower 6 , and an internal reflux pump 8 is disposed between the three-phase separator 7 and the SRB desulfurization tower 6 .
[0027] The anaerobic tank 10 is provided with a packing layer 24, and the packing rate of the packing layer 24 is 40%. The anaerobic tank 10 adopts a relatively mature anaerobic fixed bed technology, that is, a fixed bed packing is used, and a free ball packing that occupies 40% of the tank volume is attached.
[0028] An aeration plate 23 is arranged inside the biological decarbonation tank 11 .
[0029] The nitrification tank O114 is provided with a microporous aeration pipe O121 inside.
[0030] The nitrification tank O216 is provided with a microporous aeration pipe O222 inside.
[0031] The denitrification pool A113 is provided with a disperser A125 and a stirrer A126, and the denitrification pool A215 is provided with a disperser A227 and a stirrer A228. A carbon source addition port is provided on the pipeline between the disperser and the denitrification pool, and the disperser can be used to add high-quality carbon sources. A stirrer is provided inside the denitrification pool for stirring.
[0032] The treatment system of caffeine raw material drug wastewater described in the utility model, when working, the wastewater from the stripping residual liquid tank 1, the MVR distilled water and the wastewater tank 2 is fed into the metering pump 4 to achieve a 1:4 water distribution, enters the regulating tank 5 for mixing, and then continues to enter the SRB desulfurization tower 6, adopts the UASB construction mode, refluxes in a large proportion, improves the rising speed, and adds intermittent aeration twice a day, 5 minutes each time, to blow off the hydrogen sulfide in the water, and then continues to enter the anaerobic tank 10 through the relatively mature anaerobic fixed bed technology, that is, The fixed bed filler is attached with a free ball filler that accounts for 40% of the pool volume. After treatment, it continues to enter the biological decarbonization pool 11 and the horizontal flow sedimentation pool 12 for separate treatment, and then is treated through the mode of denitrification pool A113 + nitrification pool O114 + denitrification pool A215 + nitrification pool O216. The existing residence time of the two-stage denitrification is about 2.6 days. The modified nitrification pool O114 is an MBBR process. Its biofilm technology has a long microbial residence time, which is more suitable for the survival of nitrifying bacteria. Therefore, the nitrification load can meet the requirements. The BOD / TN value adopted by the denitrification pool A113 and the denitrification pool A215 is 5:1. The BOD is excessive and fine-tuned according to the actual effluent results. Finally, it is discharged after passing through the secondary sedimentation tank 17.
[0033] The utility model is suitable for drainage treatment of caffeine products.
[0034] Of course, the above contents are only preferred embodiments of the present invention and cannot be considered to limit the scope of the embodiments of the present invention. The present invention is not limited to the above examples, and any equivalent changes and improvements made by ordinary technicians in the technical field within the essential scope of the present invention shall fall within the scope of the patent coverage of the present invention.
Claims
1. A system for treating wastewater from caffeine raw material medicines, characterized by: The invention comprises an SRB desulfurization tower (6), an anaerobic tank (10), a biological decarbonization tank (11), a horizontal flow sedimentation tank (12), a denitrification tank A1 (13), a nitrification tank O1 (14), a denitrification tank A2 (15), a nitrification tank O2 (16), and a secondary sedimentation tank (17). The SRB desulfurization tower (6) is connected to a regulating tank (5), and a metering pump (4) is arranged on the inlet of the regulating tank (5); the SRB desulfurization tower (6) is connected to an anaerobic tank (10), the anaerobic tank (10) is connected to a biological decarbonization tank (11), the biological decarbonization tank (11) is connected to a horizontal flow sedimentation tank (12), and the horizontal flow sedimentation tank (12) is connected to a denitrification tank. A1 (13) is connected to the denitrification tank A1 (13), the denitrification tank A1 (13) is connected to the nitrification tank O1 (14), the nitrification tank O1 (14) is connected to the denitrification tank A2 (15), the denitrification tank A2 (15) is connected to the nitrification tank O2 (16), the nitrification tank O2 (16) is connected to the secondary sedimentation tank (17), the secondary sedimentation tank (17) is connected to the denitrification tank A1 (13) through a nitrification liquid return pump (18), and the secondary sedimentation tank (17) is connected to the denitrification tank A1 (13) through a sludge return pump (19); the fan room (20) is connected to the biological decarbonization tank (11), the nitrification tank O1 (14), and the nitrification tank O2 (16).
2. The treatment system for caffeine raw material drug wastewater according to claim 1, characterized in that: The inlet of the metering pump (4) is connected to the stripping residual liquid tank (1), the MVR distilled water and waste water tank (2).
3. The treatment system for caffeine raw material drug wastewater according to claim 1, characterized in that: An aeration pipe (9) is arranged inside the SRB desulfurization tower (6).
4. The treatment system for caffeine raw material drug wastewater according to claim 1, characterized in that: A three-phase separator (7) is arranged outside the SRB desulfurization tower (6), and an internal reflux pump (8) is arranged between the three-phase separator (7) and the SRB desulfurization tower (6).
5. The treatment system for caffeine raw material drug wastewater according to claim 1, characterized in that: A packing layer (24) is arranged inside the anaerobic tank (10), and the filling rate of the packing layer (24) is 35%-45%.
6. The treatment system for caffeine raw material drug wastewater according to claim 1, characterized in that: An aeration plate (23) is arranged inside the biological decarbonization tank (11).
7. The treatment system for caffeine raw material drug wastewater according to claim 1, characterized in that: The nitrification tank O1 (14) is provided with a microporous aeration pipe O1 (21) inside.
8. The treatment system for caffeine raw material drug wastewater according to claim 1, characterized in that: The nitrification pool O2 (16) is provided with a microporous aeration pipe O2 (22) inside.