CN218320995U - BFR (bidirectional Forwarding reactor) process-based biochemical treatment system for high-concentration wastewater of medical intermediate - Google Patents
BFR (bidirectional Forwarding reactor) process-based biochemical treatment system for high-concentration wastewater of medical intermediate Download PDFInfo
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- CN218320995U CN218320995U CN202222895077.2U CN202222895077U CN218320995U CN 218320995 U CN218320995 U CN 218320995U CN 202222895077 U CN202222895077 U CN 202222895077U CN 218320995 U CN218320995 U CN 218320995U
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Abstract
The utility model discloses a biochemical treatment system for medical intermediate high-concentration wastewater based on BFR (bidirectional Forwarding Filter) process, which comprises a flocculation sedimentation tank, wherein the water outlet end of the flocculation sedimentation tank is communicated with a hydrolysis acidification tank, the water outlet end of the hydrolysis acidification tank is communicated with at least one stage of BFR reaction tank, and the water outlet end of the BFR reaction tank is connected with a mud-water separation system; the utility model discloses can handle the high enriched waste water of medical intermediate to overall structure is simple, has improved biochemical system's impact-resistant load capacity greatly, has saved area, has improved biochemical treatment efficiency, has reduced the working costs.
Description
Technical Field
The utility model belongs to the technical field of waste water treatment, specific theory relates to a high enriched waste water biochemical treatment system of medical intermediate based on BFR technology.
Background
The pharmaceutical industry is mostly chemical synthesis medicaments, and has the characteristics of variable product types, complex process, various production scales and the like, particularly high-concentration wastewater which has high CODcr concentration (up to hundreds of thousands of mg/L) and contains a large amount of organic pollutants and has the characteristics of complex components, deep chromaticity, high toxicity and poor biodegradability; therefore, when high-concentration wastewater is treated, separate pretreatment is needed so as to achieve the purposes of improving the biodegradability of the high-concentration wastewater and reducing the chromaticity.
At present, high-concentration medical intermediate wastewater is generally treated by combining iron-carbon micro-electrolysis, fenton oxidation and biochemical combined processes; through the combined treatment of two wastewater treatment processes of iron-carbon micro-electrolysis and Fenton oxidation, part of pollutants which are difficult to degrade biologically in the medical intermediate wastewater can be oxidized and decomposed, so that part of CODcr is reduced and the biodegradability of the medical intermediate wastewater is improved.
However, in view of the complex components of the medical wastewater, the CODcr concentration of the wastewater treated by the process is still high, the content of organic matters is overlarge in the traditional biochemical treatment, and when the oxygen consumption rate of biological oxidation decomposition exceeds the reoxygenation rate, the water body is anoxic, so that aerobic aquatic organisms in the water body die, the anaerobic microorganisms are digested to generate substances such as methane, hydrogen sulfide and the like, the aquatic organisms are further inhibited, and the water body is smelly.
In addition, the medicament and the synthetic intermediate thereof often have certain bactericidal or bacteriostatic action, so that the metabolism of microorganisms such as bacteria and algae in the water body is influenced, and the balance of the whole ecological system is finally damaged.
SUMMERY OF THE UTILITY MODEL
The to-be-solved main technical problem of the utility model is to provide a high enriched waste water biochemical treatment system of medical intermediate based on BFR technology, compare with other traditional biochemical treatment processes, improved biochemical system's impact-resistant load capacity greatly, not only saved area, improved biochemical treatment efficiency, reduced the working costs moreover.
In order to solve the technical problem, the utility model provides a following technical scheme:
a BFR process-based biochemical treatment system for high-concentration wastewater of medical intermediates comprises a flocculation sedimentation tank, wherein the water outlet end of the flocculation sedimentation tank is communicated with a hydrolysis acidification tank, the water outlet end of the hydrolysis acidification tank is communicated with at least one stage BFR reaction tank, and the water outlet end of the BFR reaction tank is connected with a mud-water separation system.
The following is the utility model discloses to above-mentioned technical scheme's further optimization:
a PAC/PAM dosing system is communicated with the flocculation sedimentation tank; and a filter press is arranged on one side of the flocculation sedimentation tank and used for filter-pressing the muddy water precipitated in the flocculation sedimentation tank, the mud cakes obtained by filter-pressing are transported outwards, and the obtained filtrate flows back.
Further optimization: an adjusting tank is arranged between the flocculation sedimentation tank and the hydrolysis acidification tank, a water inlet of the adjusting tank is communicated with a water outlet of the flocculation sedimentation tank, and a water outlet of the adjusting tank is communicated with a water inlet of the hydrolysis acidification tank; and a return pipeline is arranged between the filter press and the regulating tank.
Further optimization: a sewage lifting pump is arranged in the regulating tank, a water inlet of the sewage lifting pump is communicated with the regulating tank, and a water outlet of the sewage lifting pump is communicated with a water inlet of the hydrolysis acidification tank; the wastewater is homogenized and uniformly delivered into a hydrolysis acidification tank by a sewage lifting pump after passing through an adjusting tank.
Further optimization: the hydrolysis acidification tank is filled with a three-dimensional elastic filler; the water outlet of the hydrolysis acidification tank is communicated with a multi-stage series BFR reaction tank.
Further optimization: the BFR reaction tank is internally filled with suspended fillers, the bottom of the BFR reaction tank is provided with an aeration coil, the outside of the BFR reaction tank is provided with an aeration fan, the air outlet of the aeration fan is communicated with the aeration coil, and the aeration coil is provided with a plurality of aeration holes.
Further optimization: the mud-water separation system comprises an air floatation machine, a water inlet of the air floatation machine is communicated with a water outlet of the BFR reaction tank, and a water outlet of the air floatation machine is communicated with a water outlet tank; the air floatation machine is provided with a drug feeding port, the other end of the drug feeding port is communicated with a drug feeding system, and liquid medicine is stored in the drug feeding system.
And (4) further optimizing: one side of the air flotation machine is provided with a sludge concentration tank, a sewage outlet of the air flotation machine is communicated with a sewage inlet of the sludge concentration tank, and a water outlet of the sludge concentration tank is communicated with a water inlet of the regulating tank.
Further optimization: and a sludge pump is arranged in the sludge concentration tank, a water inlet of the sludge pump is communicated with the sludge concentration tank, and a water outlet of the sludge pump is communicated with the filter press.
The above technical scheme is adopted in the utility model, think about ingeniously, rational in infrastructure, adopt hydrolytic acidification + BFR technology to handle medical intermediate waste water, medical intermediate waste water CODcr concentration after little electrolysis of iron carbon and fenton preliminary treatment is still very high, about from 8 ten thousand to about 4 thousand, organic pollutant in the waste water is mainly long chain macromolecule organic matter, biodegradability is poor, ordinary biochemical technology treatment effect is poor, can not satisfy out water quality of water requirement, and hydrolytic acidification chemical industry + BFR combined technology, at first through hydrolytic acidification with difficult degradation macromolecule organic matter in the waste water decompose into the broken chain micromolecule organic matter, improve the biodegradability of waste water.
Meanwhile, a part of CODcr can be removed, the wastewater after hydrolytic acidification treatment enters a BFR reaction tank, and the BFR process has the advantages of high microorganism concentration, impact load resistance, low temperature resistance, easy formation of dominant strains on the surface of the filler, long sludge age, no need of backwashing, no sludge backflow and the like, so that organic pollutants in the wastewater can be effectively removed.
The utility model adopting the technical proposal also has the advantages of small occupied area, simple structure of the treated structure, low labor intensity, stable water quality of the discharged water, and the like; the whole treatment system utilizes the original pretreatment and slurry dehydration system, does not need to add a sludge treatment system, realizes the resource utilization of sludge, and does not produce secondary pollution.
And the multi-stage BFR reaction tank is adopted, enrichment of strains with different advantages can be realized, the tolerance to fluctuation of the quality of inlet water is greatly improved, the treatment effect is improved, and the stability of the quality of outlet water is ensured; the filling rate of the suspended filler in the BFR reaction tank is high, and the specific surface area of the filler is large, so that the concentration of the biomass after the filler is subjected to film formation is high and is 5-10 times of that of the biomass after the filler is subjected to film formation, the low-temperature resistance effect of the system is superior to that of the traditional biochemical process, and the quality of the effluent in winter is kept stable.
The suspended filler in the BFR reactor pool is in a fluidized state under the aeration condition, can be fully contacted with wastewater and air, and simultaneously divides large bubbles in water into small bubbles under the conditions of continuous collision of the filler and turbulent fluctuation of water flow, so that the gas-liquid contact area is increased, the oxygen utilization rate is improved, the energy consumption can be saved, and the system operation cost is reduced; the CODcr concentration of the wastewater treated by the treatment system is far lower than a specified discharge limit value, and the wastewater can stably run.
The present invention will be further explained with reference to the drawings and examples.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the embodiment of the present invention.
Detailed Description
Example (b): as shown in fig. 1, the biochemical treatment system for the pharmaceutical intermediate high-concentration wastewater based on the BFR process comprises a flocculation sedimentation tank, wherein a water outlet end of the flocculation sedimentation tank is communicated with a hydrolysis acidification tank, a water outlet end of the hydrolysis acidification tank is communicated with at least one stage of BFR reaction tank, and a water outlet end of the BFR reaction tank is connected with a mud-water separation system.
The water inlet end of the flocculation sedimentation tank is communicated with the water outlet end of an external iron-carbon micro-electrolysis and Fenton system, and the medical intermediate wastewater enters the flocculation sedimentation tank after being subjected to early-stage iron-carbon micro-electrolysis and Fenton pretreatment.
And a drug inlet is arranged above the flocculation sedimentation tank, and the other end of the drug inlet is communicated with a PAC/PAM drug adding system through a communicating pipeline.
The PAC/PAM dosing system conveys PAC or/and PAM liquid medicine to the flocculation sedimentation tank and mixes the PAC or/and PAM liquid medicine with wastewater in the flocculation sedimentation tank.
The PAC is the prior art, and the PAC is polyaluminium chloride for sewage treatment.
PAM is prior art, and PAM is flocculating agent for sewage treatment.
One side of flocculation and precipitation pond is provided with the pressure filter, the pressure filter is used for carrying out the filter-pressing to the muddy water of flocculation and precipitation pond in, the mud cake that the filter-pressing obtained is carried outward and is handled, the filtrating that the filter-pressing obtained flows back.
And an adjusting tank is arranged between the flocculation sedimentation tank and the hydrolysis acidification tank, a water inlet of the adjusting tank is communicated with a water outlet of the flocculation sedimentation tank, and a water outlet of the adjusting tank is communicated with a water inlet of the hydrolysis acidification tank.
A backflow pipeline is arranged between the filter press and the regulating tank, and filtrate obtained by filter pressing operation of the filter press flows back into the regulating tank through the backflow pipeline.
Design like this, medical intermediate waste water gets into the flocculation and precipitation pond after iron-carbon micro-electrolysis and fenton preliminary treatment in earlier stage, and PAC/PAM medicine system carries PAC or/and PAM liquid medicine to the flocculation and precipitation pond this moment to mix with the waste water in the flocculation and precipitation pond, can handle waste water through PAC or/and PAM liquid medicine.
And then supernatant in the flocculation sedimentation tank is conveyed into an adjusting tank, the mud-water mixture in the flocculation sedimentation tank is conveyed into a filter press, the filter press performs filter pressing on the mud-water mixture to obtain mud cakes, the mud cakes are conveyed outwards for subsequent resource treatment, and filtrate filtered by the filter press automatically flows into the adjusting tank through a return pipeline.
And a sewage lifting pump is arranged in the regulating reservoir, a water inlet of the sewage lifting pump is communicated with the regulating reservoir, and a water outlet of the sewage lifting pump is communicated with a water inlet of the hydrolysis acidification pool through a water delivery pipe.
And the wastewater is homogenized and uniformly delivered to the hydrolysis acidification tank by a sewage lifting pump in the regulating tank.
The hydrolysis acidification tank is filled with a three-dimensional elastic filler, and a biological film on the surface of the three-dimensional elastic filler is mainly hydrolysis acidification bacteria.
By the design, after the wastewater enters the hydrolysis acidification tank, macromolecule organic matters in the wastewater are degraded into micromolecule organic matters under the action of facultative and anaerobic microorganisms in the hydrolysis acidification tank, so that the biodegradability of the wastewater is improved, a part of CODcr can be removed, and the treatment burden of a subsequent aerobic system is reduced.
And the water outlet of the hydrolysis acidification tank is communicated with at least one stage of BFR reaction tank.
And suspended fillers are filled in the BFR reaction tank, and the specific gravity of the fillers is close to that of water.
The bottom of the BFR reaction tank is provided with an aeration coil, the outside of the BFR reaction tank is provided with an aeration fan, the air outlet of the aeration fan is communicated with the aeration coil, and the aeration coil is provided with a plurality of aeration holes.
By the design, the aeration fan outputs high-pressure air to be conveyed into the aeration coil pipe, and the aeration coil pipe outputs the high-pressure air through the aeration hole to aerate the BFR reaction tank.
By the design, the suspended filler in the BFR reaction tank is in a fluidized state under the action of aeration and fully contacts with wastewater, the environment for microbial growth is a gas phase, a liquid phase and a solid phase, air bubbles are finer by utilizing collision in water, and the utilization rate of oxygen is improved.
Meanwhile, anaerobic bacteria and facultative bacteria grow in the carrier, and aerobic bacteria grow outside the carrier, so that nitrification and denitrification exist simultaneously, and the biochemical treatment effect is improved; the biochemical process has high load resistance and good treatment effect on water with high content of organic pollutants, namely medical intermediates.
In this embodiment, the BFR reaction tank may be multi-stage, and the multi-stage BFR reaction tank is arranged in series, and the water inlet of the first-stage BFR reaction tank is communicated with the water outlet of the hydrolysis acidification tank, and the effluent of the hydrolysis acidification tank sequentially enters the multi-stage BFR reaction tank.
And the water outlet of the last-stage BFR reaction tank is communicated with the water inlet of the mud-water separation system, and the effluent of the last-stage BFR reaction tank enters the mud-water separation system.
In addition to this embodiment, the multiple BFR reaction tanks are arranged in parallel, and the water inlet of each BFR reaction tank is communicated with the water outlet of the hydrolysis acidification tank, and the effluent of the hydrolysis acidification tank enters the multiple BFR reaction tanks respectively.
In this embodiment, if the concentration of organic pollutants in the wastewater is too high, the single-stage BFR reaction tank cannot meet the effluent quality requirement, and the multi-stage BFR reaction tanks can be connected in series to treat the wastewater.
The BFR process is a fluidized bed biomembrane process, adopts a suspended filler biomembrane technology, has small occupied area, high treatment efficiency, mature technology, no need of backwashing, low SS content of effluent and no need of manual guard after normal operation of the system; the process realizes the separation of hydraulic retention time and sludge retention time, has low concentration of suspended matters in the effluent, and can save a secondary sedimentation tank and a sludge backflow facility.
In order to ensure the quality of the effluent water, a mud-water separation system is subsequently arranged to carry out solid-liquid separation on micromolecules and residual colloid suspended matters in the water.
The mud-water separation system comprises an air floatation machine, a water inlet of the air floatation machine is communicated with a water outlet of the BFR reaction tank, and water discharged from the BFR reaction tank enters the air floatation machine.
The air flotation machine is provided with a medicine feeding port, the other end of the medicine feeding port is communicated with a medicine feeding system through a communicating pipe, and liquid medicine is stored in the medicine feeding system.
The liquid medicine is PAC and PAM, the drug adding system adds PAC and PAM into the air floatation machine to be mixed with wastewater in the air floatation machine, and the wastewater can be treated through the PAC and PAM liquid medicine.
The medicine feeding system outputs medicine liquid which is fed into the air floatation machine through the communicating pipe and the medicine feeding port and mixed with wastewater in the air floatation machine.
And the water outlet of the air floatation machine is communicated with a water outlet tank, the water outlet of the air floatation machine enters the water outlet tank, and the water outlet of the water outlet tank is discharged to a downstream sewage plant.
And a sludge concentration tank is arranged on one side of the air floatation machine, and a sewage outlet of the air floatation machine is communicated with a sewage inlet of the sludge concentration tank.
Scum generated by the air floatation machine in the air floatation process is discharged into a sludge concentration tank.
And the water outlet of the sludge concentration tank is communicated with the water inlet of the regulating tank, and supernatant in the sludge concentration tank is conveyed into the regulating tank to be treated continuously.
And a sludge pump is arranged in the sludge concentration tank, a water inlet of the sludge pump is communicated with the sludge concentration tank, and a water outlet of the sludge pump is communicated with the filter press.
Sludge in the wastewater in the sludge concentration tank is concentrated and then is periodically conveyed into the filter press by a sludge pump, and enters the filter press together with the sludge in the flocculation sedimentation tank.
And at the moment, carrying out filter pressing on the muddy water by a filter press, carrying out outward treatment on mud cakes obtained by the filter pressing, and returning supernatant obtained by the filter pressing to the regulating tank for continuous treatment.
When the device is used, the water inlet end of the flocculation sedimentation tank is communicated with the water outlet end of an external iron-carbon micro-electrolysis and Fenton system, and the medical intermediate wastewater enters the flocculation sedimentation tank after being pretreated by the early-stage iron-carbon micro-electrolysis and Fenton.
PAC/PAM medicine system carries PAC or/and PAM liquid medicine to flocculation and precipitation pond this moment to mix with the waste water in the flocculation and precipitation pond, can handle waste water through PAC or/and PAM liquid medicine.
And then supernatant in the flocculation sedimentation tank is conveyed into an adjusting tank, the mud-water mixture in the flocculation sedimentation tank is conveyed into a filter press, the filter press performs filter pressing on the mud-water mixture to obtain mud cakes, the mud cakes are conveyed outwards for subsequent resource treatment, and filtrate filtered by the filter press automatically flows into the adjusting tank through a return pipeline.
The wastewater is conveyed to the hydrolysis acidification tank by the sewage lifting pump after being homogenized and metered in the regulating tank, macromolecular organic matters in the water are degraded into micromolecular organic matters under the action of facultative and anaerobic microorganisms in the hydrolysis acidification tank, the biodegradability of the wastewater is improved, a part of CODcr can be removed, and the treatment burden of a subsequent aerobic system is reduced.
The outlet water of the hydrolysis acidification tank enters a BFR reaction tank, a suspension filler is filled in the BFR reaction tank, the aeration fan works to output high-pressure air, and the air is conveyed into the BFR reaction tank through an aeration coil pipe, so that aeration is realized.
The suspended filler is in a fluidized state under the aeration condition, the biofilm on the surface of the filler decomposes organic pollutants in water through biological adsorption and oxidation, and purifies the wastewater, and single-stage or multi-stage BFR reaction tanks can be connected in series according to the difference of the quality of inlet water and the standard of outlet water.
And the effluent of the BFR reaction tank automatically flows into an air floatation machine, solid-liquid separation is carried out in the air floatation machine through dissolved air floatation, suspended state and a part of colloid particles in water are removed, and a part of CODcr and chromaticity can be removed at the same time.
And the water discharged from the air floatation machine enters a water outlet tank, the water in the water outlet tank reaches the receiving standard of a sewage plant, and the water discharged from the water outlet tank enters a downstream sewage plant.
Scum generated at the upper part of the air floatation machine and sludge deposited at the bottom of the air floatation machine flow into a sludge concentration tank through a sludge pipeline, supernatant generated after the sludge in the sludge concentration tank is concentrated returns to an adjusting tank for treatment, and the sludge at the bottom of the sludge concentration tank and the sludge deposited in a flocculation sedimentation tank enter a filter press together for dehydration treatment.
For those skilled in the art, based on the teachings of the present invention, changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.
Claims (9)
1. The utility model provides a high enriched waste water biochemical treatment system of medical intermediate based on BFR technology, includes flocculation and precipitation pond, its characterized in that: the water outlet end of the flocculation sedimentation tank is communicated with a hydrolysis acidification tank, the water outlet end of the hydrolysis acidification tank is communicated with at least one stage BFR reaction tank, and the water outlet end of the BFR reaction tank is connected with a mud-water separation system.
2. The BFR process-based biochemical treatment system for high concentration wastewater of medical intermediates is characterized in that: a PAC/PAM dosing system is communicated with the flocculation sedimentation tank; and a filter press is arranged on one side of the flocculation sedimentation tank and used for carrying out filter pressing on the muddy water precipitated in the flocculation sedimentation tank, and mud cakes obtained by filter pressing are transported outwards and filtrate obtained is refluxed.
3. The BFR process-based biochemical treatment system for high concentration wastewater of medical intermediates is characterized in that: an adjusting tank is arranged between the flocculation sedimentation tank and the hydrolysis acidification tank, a water inlet of the adjusting tank is communicated with a water outlet of the flocculation sedimentation tank, and a water outlet of the adjusting tank is communicated with a water inlet of the hydrolysis acidification tank; and a return pipeline is arranged between the filter press and the regulating tank.
4. The high-concentration wastewater biochemical treatment system for medical intermediates based on the BFR process as recited in claim 3, wherein: a sewage lifting pump is arranged in the regulating tank, a water inlet of the sewage lifting pump is communicated with the regulating tank, and a water outlet of the sewage lifting pump is communicated with a water inlet of the hydrolysis acidification tank; the wastewater is homogenized and uniformly delivered into a hydrolysis acidification tank by a sewage lifting pump after passing through an adjusting tank.
5. The high-concentration wastewater biochemical treatment system for medical intermediates based on the BFR process as recited in claim 4, wherein: the hydrolysis acidification tank is filled with a three-dimensional elastic filler; the water outlet of the hydrolysis acidification tank is communicated with a multi-stage series BFR reaction tank.
6. The BFR process-based biochemical treatment system for high concentration wastewater of medical intermediates comprises: the BFR reaction tank is internally filled with suspended fillers, the bottom of the BFR reaction tank is provided with an aeration coil, the outside of the BFR reaction tank is provided with an aeration fan, the air outlet of the aeration fan is communicated with the aeration coil, and the aeration coil is provided with a plurality of aeration holes.
7. The BFR process-based biochemical treatment system for high concentration wastewater of medical intermediates as recited in claim 6, wherein said biochemical treatment system comprises: the mud-water separation system comprises an air floatation machine, a water inlet of the air floatation machine is communicated with a water outlet of the BFR reaction tank, and a water outlet of the air floatation machine is communicated with a water outlet tank; the air floatation machine is provided with a drug feeding port, the other end of the drug feeding port is communicated with a drug feeding system, and liquid medicine is stored in the drug feeding system.
8. The BFR process-based biochemical treatment system for high concentration wastewater of medical intermediates as recited in claim 7, wherein said biochemical treatment system comprises: one side of the air flotation machine is provided with a sludge concentration tank, a sewage outlet of the air flotation machine is communicated with a sewage inlet of the sludge concentration tank, and a water outlet of the sludge concentration tank is communicated with a water inlet of the regulating tank.
9. The BFR process-based biochemical treatment system for high concentration wastewater of medical intermediates as recited in claim 8, wherein said biochemical treatment system comprises: and a sludge pump is arranged in the sludge concentration tank, a water inlet of the sludge pump is communicated with the sludge concentration tank, and a water outlet of the sludge pump is communicated with the filter press.
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| CN202222895077.2U CN218320995U (en) | 2022-11-01 | 2022-11-01 | BFR (bidirectional Forwarding reactor) process-based biochemical treatment system for high-concentration wastewater of medical intermediate |
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