CN110563242A - caffeine wastewater treatment process - Google Patents
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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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- 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
- C02F1/24—Treatment of water, waste water, or sewage by flotation
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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
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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
- 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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/34—Organic compounds containing oxygen
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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
- C02F2101/38—Organic compounds containing nitrogen
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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
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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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
- C02F3/301—Aerobic and anaerobic treatment in the same reactor
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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
- C02F3/302—Nitrification and denitrification treatment
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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
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
Abstract
The invention discloses a wastewater treatment process of caffeine, which effectively removes organic pollutants in the caffeine wastewater by combining MBBR reaction and TCBS reaction after removing particulate matters, colloidal matters and difficultly decomposed macromolecular substances in water through adsorption and precipitation.
Description
Technical Field
the invention relates to the technical field of wastewater treatment, in particular to a caffeine wastewater treatment process.
background
Caffeine, a xanthine alkaloid compound, is a central nervous stimulant that temporarily drives drowsiness and restores energy, and is used clinically to treat neurasthenia and coma resuscitation. Coffee, tea, soft drinks and energy drinks with caffeine content are very popular, however, most of the caffeine is mainly produced by chemical synthesis due to low yield of natural caffeine.
Because the raw materials for chemical synthesis of caffeine are mostly strong acid, strong base and toxic and harmful substances, the wastewater produced in the production process has large water volume, complex water quality components, high organic pollutants and inorganic salts, is not only harmful to human bodies, but also has great pollution to the environment.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a caffeine wastewater treatment process.
In order to achieve the purpose, the invention adopts the technical scheme that:
a caffeine wastewater treatment process, comprising the steps of:
(1) adsorption and precipitation: conveying the high-concentration caffeine wastewater with the temperature of 10-3 ℃ and the pH value of 6-9 to an adsorption and precipitation tank for adsorption and precipitation to remove particulate matters, colloidal matters and macromolecular matters which are difficult to decompose in the wastewater;
(2) adjusting and mixing: conveying the caffeine low-concentration wastewater with the temperature of 10-30 ℃ and the pH value of 8-9 to a regulating tank, fully mixing the caffeine low-concentration wastewater with the high-concentration wastewater obtained in the step (1), and pumping the mixture into an MBBR (moving bed biofilm reactor) reaction tank;
(3) MBBR reaction: reacting the mixed solution obtained in the step (2) in an MBBR reaction tank to degrade organic matters in the mixed solution, wherein the reaction time is 15-25h, DO is 1-3mg/l, and the temperature is 15-42 ℃;
(4) and (3) precipitation: the mixed liquid from the MBBR reaction tank flows into a sedimentation tank for sedimentation, and supernatant liquid after sedimentation automatically flows into the TCBS reaction tank;
(5) TCBS reaction: reacting the supernatant obtained in the step (4) in a TCBS pool to degrade residual COD and NH3-N, wherein the reaction time is 60-80h, DO is 2-4mg/l, the pH value is 8-9, and the temperature is 15-40 ℃;
(6) Air flotation: and (5) removing SS and chroma of the effluent obtained in the step (5) by air floatation, and discharging the effluent which reaches a discharge standard.
Preferably, in the step (2), activated carbon and microorganisms are used for intercepting and adsorbing particulate matters, colloidal matters and macromolecular matters which are difficult to decompose in the wastewater.
Preferably, in the step (2), the ratio of the low-concentration wastewater to the high-concentration wastewater is 1: 1.
Preferably, the volume of the suspended filler in the MBBR tank in the step (3) is 40 percent of the tank volume, and the density is 0.96kg/m3The microorganism is a mixture of nitrifying bacteria and denitrifying bacteria, the concentration is 6-10g/L, and an aeration pipe of the MBBR reaction tank is made of a high-strength composite material.
preferably, the reaction time of the step (3) is 20h, the DO is 2mg/l, and the temperature is 38 ℃.
Preferably, the TCBS reaction tank in the step (5) is provided with an anoxic zone, a main aeration zone and an SBR zone, wherein the volume of suspended filler in the main aeration zone is 40 percent of the volume of the tank, and the density is 0.96kg/m3The microorganism is a mixture of nitrifying bacteria and denitrifying bacteria, and the concentration is 6-10 g/L.
The reaction time of the step (5) is 70h, DO is 3mg/l, the pH value is 8, and the temperature is 28 ℃.
Preferably, the sludge discharged from the steps (1) and (5) is sent to a sludge concentration tank for concentration, and the concentrated sludge is discharged after dehydration treatment.
preferably, the sludge precipitated in the step (4) flows back to the MBBR reaction tank, and part of the sludge flows back to the adsorption precipitation tank.
The caffeine wastewater treatment process makes up the defects of the prior art, the composite bacteria are added into the regulating tank, the BOD, the COD, the SS and the TN can be efficiently removed, the water transparency is improved, the sludge sedimentation in the wastewater is accelerated, the sludge floc particles are enlarged, the sludge floc structure is adjusted, the activated carbon is matched to achieve a better solid particle adsorption effect, the microorganisms in the MBBR tank and the TCBS reaction tank are mixed by adopting nitrobacteria and denitrifying bacteria according to a proper proportion, the nitrobacteria and the denitrifying bacteria form a symbiotic complementation effect, the treatment effect is improved, the sludge discharged in the steps (1) and (5) is concentrated and then discharged, the environmental pollution is less, the sludge precipitated in the step (4) flows back into the MBBR reaction tank, part of the sludge flows back into the sludge adsorption sedimentation tank for secondary treatment, the treatment effect is improved, the process is simple, the removal rate of the COD and the NH3-N are high, low operation cost and little environmental pollution.
drawings
FIG. 1 is a block flow diagram of the present invention.
Detailed Description
The invention is further illustrated with reference to the figures and examples.
Example 1
A caffeine wastewater treatment process is characterized by comprising the following steps: comprises the following steps:
(1) Adsorption and precipitation: conveying the high-concentration caffeine wastewater with the temperature of 30 ℃ and the pH value of 9 to an adsorption and precipitation tank for adsorption and precipitation to remove particulate matters, colloidal matters and macromolecular matters which are difficult to decompose in the wastewater;
(2) adjusting and mixing: conveying the caffeine low-concentration wastewater with the temperature of 30 ℃ and the pH value of 9 to a regulating tank, fully mixing the caffeine low-concentration wastewater with the high-concentration wastewater obtained in the step (1), and conveying the mixture into an MBBR (moving bed biofilm reactor) reaction tank by using a pump;
(3) MBBR reaction: reacting the mixed solution obtained in the step (2) in an MBBR reaction tank to degrade organic matters in the mixed solution, wherein the reaction time is 25h, DO is 3mg/l, and the temperature is 42 ℃;
(4) and (3) precipitation: the mixed liquid from the MBBR reaction tank flows into a sedimentation tank for sedimentation, and supernatant liquid after sedimentation automatically flows into the TCBS reaction tank;
(5) TCBS reaction: reacting the supernatant obtained in the step (4) in a TCBS pool to degrade residual COD and NH3-N, wherein the reaction time is 80h, the DO is 4mg/l, the PH value is 9, and the temperature is 40 ℃;
(6) air flotation: and (4) removing SS and chroma of the effluent obtained in the step (5) by air floatation, and discharging the effluent until the effluent meets the discharge standard, wherein COD (chemical oxygen demand) of the effluent is 500mg/l, and NH3-N (chemical oxygen demand-N) is 25.
Example 2
a caffeine wastewater treatment process is characterized by comprising the following steps: comprises the following steps:
(1) Adsorption and precipitation: conveying the high-concentration caffeine wastewater with the temperature of 10 ℃ and the pH value of 6 to an adsorption and precipitation tank for adsorption and precipitation to remove particulate matters, colloidal matters and macromolecular matters which are difficult to decompose in the wastewater;
(2) adjusting and mixing: conveying the caffeine low-concentration wastewater with the temperature of 10 ℃ and the pH value of 8 to a regulating tank, fully mixing the caffeine low-concentration wastewater with the high-concentration wastewater obtained in the step (1), and conveying the mixture into an MBBR (moving bed biofilm reactor) reaction tank by using a pump;
(3) MBBR reaction: reacting the mixed solution obtained in the step (2) in an MBBR reaction tank to degrade organic matters in the mixed solution, wherein the reaction time is 15h, DO is 1mg/l, and the temperature is 15 ℃;
(4) and (3) precipitation: the mixed liquid from the MBBR reaction tank flows into a sedimentation tank for sedimentation, and supernatant liquid after sedimentation automatically flows into the TCBS reaction tank;
(5) TCBS reaction: reacting the supernatant obtained in the step (4) in a TCBS pool to degrade residual COD and NH3-N, wherein the reaction time is 60 hours, DO is 2mg/l, the PH value is 8, and the temperature is 15 ℃;
(6) air flotation: and (4) removing SS and chroma of the effluent obtained in the step (5) by air floatation, and discharging the effluent until the effluent meets the discharge standard, wherein COD (chemical oxygen demand) of the effluent is 356mg/l, and NH3-N (chemical oxygen demand-N) of the effluent is 5.
example 3
A caffeine wastewater treatment process is characterized by comprising the following steps: comprises the following steps:
(1) adsorption and precipitation: conveying the high-concentration caffeine wastewater with the temperature of 20 ℃ and the pH value of 7 to an adsorption and precipitation tank for adsorption and precipitation to remove particulate matters, colloidal matters and macromolecular matters which are difficult to decompose in the wastewater;
(2) Adjusting and mixing: conveying the caffeine low-concentration wastewater with the temperature of 20 ℃ and the pH value of 9 to a regulating tank, fully mixing the caffeine low-concentration wastewater with the high-concentration wastewater obtained in the step (1), and conveying the mixture into an MBBR (moving bed biofilm reactor) reaction tank by using a pump;
(3) MBBR reaction: reacting the mixed solution obtained in the step (2) in an MBBR reaction tank to degrade organic matters in the mixed solution, wherein the reaction time is 20h, DO is 2mg/l, and the temperature is 30 ℃;
(4) and (3) precipitation: the mixed liquid from the MBBR reaction tank flows into a sedimentation tank for sedimentation, and supernatant liquid after sedimentation automatically flows into the TCBS reaction tank;
(5) TCBS reaction: reacting the supernatant obtained in the step (4) in a TCBS pool to degrade residual COD and NH3-N, wherein the reaction time is 70h, DO is 3mg/l, the pH value is 9, and the temperature is 28 ℃;
(6) air flotation: and (4) removing SS and chroma of the effluent obtained in the step (5) by air floatation, and then achieving the discharge standard for discharge, wherein COD (chemical oxygen demand) of the effluent is 426mg/l, and NH3-N is 12.
example 4
(1) Adsorption and precipitation: conveying the high-concentration caffeine wastewater with the temperature of 15 ℃ and the pH value of 8 to an adsorption and precipitation tank for adsorption and precipitation to remove particulate matters, colloidal matters and macromolecular matters which are difficult to decompose in the wastewater;
(2) Adjusting and mixing: conveying the caffeine low-concentration wastewater with the temperature of 15 ℃ and the pH value of 8 to a regulating tank, fully mixing the caffeine low-concentration wastewater with the high-concentration wastewater obtained in the step (1), and then pumping the mixture into an MBBR (moving bed biofilm reactor) reaction tank;
(3) MBBR reaction: reacting the mixed solution obtained in the step (2) in an MBBR reaction tank to degrade organic matters in the mixed solution, wherein the reaction time is 18h, DO is 2mg/l, and the temperature is 20 ℃;
(4) and (3) precipitation: the mixed liquid from the MBBR reaction tank flows into a sedimentation tank for sedimentation, and supernatant liquid after sedimentation automatically flows into the TCBS reaction tank;
(5) TCBS reaction: reacting the supernatant obtained in the step (4) in a TCBS pool to degrade residual COD and NH3-N, wherein the reaction time is 65 hours, DO is 3mg/l, the pH value is 8, and the temperature is 20 ℃;
(6) Air flotation: and (4) removing SS and chroma of the effluent obtained in the step (5) by air floatation, and discharging the effluent until the effluent meets the discharge standard, wherein COD (chemical oxygen demand) of the effluent is 365mg/l, and NH3-N (chemical oxygen demand-N) of the effluent is 8.
Example 5
(1) adsorption and precipitation: conveying the high-concentration caffeine wastewater with the temperature of 25 ℃ and the pH value of 6 to an adsorption and precipitation tank for adsorption and precipitation to remove particulate matters, colloidal matters and macromolecular matters which are difficult to decompose in the wastewater;
(2) adjusting and mixing: conveying the caffeine low-concentration wastewater with the temperature of 25 ℃ and the pH value of 9 to a regulating tank, fully mixing the caffeine low-concentration wastewater with the high-concentration wastewater obtained in the step (1), and then pumping the mixture into an MBBR (moving bed biofilm reactor) reaction tank;
(3) MBBR reaction: reacting the mixed solution obtained in the step (2) in an MBBR reaction tank to degrade organic matters in the mixed solution, wherein the reaction time is 22h, DO is 1mg/l, and the temperature is 35 ℃;
(4) And (3) precipitation: the mixed liquid from the MBBR reaction tank flows into a sedimentation tank for sedimentation, and supernatant liquid after sedimentation automatically flows into the TCBS reaction tank;
(5) TCBS reaction: reacting the supernatant obtained in the step (4) in a TCBS pool to degrade residual COD and NH3-N, wherein the reaction time is 75h, DO is 4mg/l, the pH value is 9, and the temperature is 35 ℃;
(6) Air flotation: and (4) removing SS and chroma of the effluent obtained in the step (5) by air floatation, and discharging the effluent until the effluent meets the discharge standard, wherein COD (chemical oxygen demand) of the effluent is 420mg/l, and NH3-N (chemical oxygen demand-N) of the effluent is 14.
in the invention, the TCBS reaction tank is provided with an anoxic zone, a main aeration zone and an SBR zone, wherein the anoxic zone mainly has the functions of denitrification and decomposition of nitrate and nitrite; the main exposure area mainly acts on impact load resistance and removes COD and ammonia nitrogen; the SBR area is mainly used for deeply removing COD, residual ammonia nitrogen and separating mud and water, the wastewater treatment process has high removal rate of COD and ammonia nitrogen, the removal rate can reach more than 98 percent, the final effluent quality COD is less than or equal to 500mg/l and NH3-N is less than or equal to 25, and the national discharge standard is reached.
the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are included in the scope of the present invention.
Claims (9)
1. A caffeine wastewater treatment process, comprising the steps of:
(1) Adsorption and precipitation: conveying the high-concentration caffeine wastewater with the temperature of 10-30 ℃ and the pH value of 6-9 to an adsorption and precipitation tank for adsorption and precipitation to remove particulate matters, colloidal matters and macromolecular matters which are difficult to decompose in the wastewater;
(2) adjusting and mixing: conveying the caffeine low-concentration wastewater with the temperature of 10-30 ℃ and the pH value of 8-9 to a regulating tank, fully mixing the caffeine low-concentration wastewater with the high-concentration wastewater obtained in the step (1), and pumping the mixture into an MBBR (moving bed biofilm reactor) reaction tank;
(3) MBBR reaction: reacting the mixed solution obtained in the step (2) in an MBBR reaction tank to degrade organic matters in the mixed solution, wherein the reaction time is 15-25h, DO is 1-3mg/l, and the temperature is 15-42 ℃;
(4) and (3) precipitation: the mixed liquid from the MBBR reaction tank flows into a sedimentation tank for sedimentation, and supernatant liquid after sedimentation automatically flows into the TCBS reaction tank;
(5) TCBS reaction: reacting the supernatant obtained in the step (4) in a TCBS pool to degrade residual COD and NH3-N, wherein the reaction time is 60-80h, DO is 2-4mg/l, the pH value is 8-9, and the temperature is 15-40 ℃;
(6) Air flotation: and (5) removing SS and chroma of the effluent obtained in the step (5) by air floatation, and discharging the effluent which reaches a discharge standard.
2. The caffeine wastewater treatment process according to claim 1, wherein in the step (2), activated carbon and composite bacteria are used to entrap and adsorb particulate matter, colloidal matter, and difficultly decomposed macromolecular matter in wastewater.
3. the caffeine wastewater treatment process according to claim 1, wherein the ratio of the low-concentration wastewater to the high-concentration wastewater in the step (2) is 1: 1.
4. The caffeine wastewater treatment process as set forth in claim 1, wherein the MBBR tank in the step (3) contains 40% by volume of suspended solids, and has a density of 0.96kg/m3The microorganism is a mixture of nitrifying bacteria and denitrifying bacteria, the concentration is 6-10g/L, and an aeration pipe of the MBBR reaction tank is made of a high-strength composite material.
5. the caffeine wastewater treatment process as set forth in claim 4, wherein the reaction time of step (3) is 20 hours, DO is 2mg/l, and the temperature is 38 ℃.
6. The caffeine wastewater treatment process according to claim 1, wherein the TCBS reaction tank in the step (5) is provided with an anoxic zone, a main aeration zone and an SBR zone, the main aeration zone has a suspended filler volume of 40% of the tank volume and a density of 0.96kg/m3The microorganism is a mixture of nitrifying bacteria and denitrifying bacteria, and the concentration is 6-10 g/L.
7. the caffeine wastewater treatment process as set forth in claim 6, wherein the reaction time of step (5) is 70 hours, DO is 3mg/l, pH is 8, and temperature is 28 ℃.
8. The caffeine-containing wastewater treatment process according to claim 1, wherein the sludge discharged from the steps (1) and (5) is sent to a sludge concentration tank for concentration, and the concentrated sludge is discharged after dehydration treatment.
9. The caffeine wastewater treatment process according to claim 1, wherein the sludge precipitated in the step (4) is returned to the MBBR reaction tank, and part of the sludge is returned to the adsorption precipitation tank.
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| CN102134144A (en) * | 2011-03-28 | 2011-07-27 | 陆大培 | Treatment process of butadiene styrene rubber sewage |
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| CN106396258A (en) * | 2016-09-29 | 2017-02-15 | 中冶华天工程技术有限公司 | Technological method for treating coking wastewater |
| CN106630472A (en) * | 2016-12-30 | 2017-05-10 | 四川亿龙环保工程有限公司 | Printing and dyeing waste water treatment process |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1631818A (en) * | 2003-12-23 | 2005-06-29 | 何义亮 | Organic waste water treatment process |
| CN101708935A (en) * | 2009-11-30 | 2010-05-19 | 天津市塘沽区鑫宇环保科技有限公司 | Method for treating container washing wastewater |
| CN102134144A (en) * | 2011-03-28 | 2011-07-27 | 陆大培 | Treatment process of butadiene styrene rubber sewage |
| US20140151296A1 (en) * | 2012-11-30 | 2014-06-05 | General Electric Company | Produced water treatment to remove organic compounds |
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