CN110921974A - Urban organic wastewater purification treatment process - Google Patents
Urban organic wastewater purification treatment process Download PDFInfo
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- C02F9/00—Multistage treatment of water, waste water or sewage
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- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F1/00—Treatment of water, waste water, or sewage
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- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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Abstract
The invention relates to the technical field of wastewater treatment, in particular to a process for purifying and treating urban organic wastewater, which comprises a pretreatment system, a biological treatment system and an advanced treatment system, wherein the pretreatment system comprises the following steps: setting a fine grid: the fine grating is arranged at the water inlet to remove larger floaters in the wastewater, the load of the subsequent treatment unit is reduced, the normal operation of the subsequent treatment unit is ensured, the sewage after passing through the grating enters the water collecting tank and stays in the water collecting tank for 2 hours, and meanwhile, the water quantity adjusting function is achieved. Steam pretreatment: the organic wastewater has a high concentration of pollutants and is heated by steam. In the ECHAP reactor, the effects of regulating water quantity and balancing water quality and removing toxic and inhibitory substances in high-concentration wastewater by using a traditional regulating tank can be achieved, and the abundant microbial flora can perform a pre-degradation effect on the wastewater, so that the working environment of subsequent structures is improved, and each structure can play a better role.
Description
Technical Field
The invention relates to the technical field of wastewater treatment, in particular to a process for purifying and treating urban organic wastewater.
Background
The urban organic wastewater has great harm to the environment, and is mainly shown in the following aspects: firstly, the SS of the wastewater is high, the SS adheres to the surface of a biological membrane, the contact between the wastewater and the biological membrane is blocked, the biochemical removal efficiency is reduced, and intermediate products and the like generated in the production process are not easy to be biochemical; secondly, the content of suspended matters and toxic and harmful substances entering the biological treatment structure is very high; and moreover, the urban organic wastewater has the characteristics of high COD (chemical oxygen demand), high salt content and the like, and serious pollution is caused to water and soil due to the accumulation of the urban organic wastewater for a long time, so that the health of human beings is threatened. However, in the existing traditional wastewater treatment technology, only a regulating tank is used for regulating water quantity and balancing water quality, and the removal rate of COD and salt is low, so that various problems caused by urban organic wastewater cannot be effectively solved.
Disclosure of Invention
Technical problem to be solved
The problem of in the current traditional waste water treatment technology, only play equalizing water quality of regulating reservoir regulation water yield, and COD, the clearance of salt volume is low is solved, provides an urban organic waste water purification treatment technology.
(II) technical scheme
A process for purifying and treating the organic sewage in city is composed of pretreatment system, biologic treatment system, and advanced treatment system, and the pretreatment system includes the following steps:
s1, setting fine grids:
the fine grating is arranged at the water inlet to remove larger floaters in the wastewater, the load of the subsequent treatment unit is reduced, the normal operation of the subsequent treatment unit is ensured, the sewage after passing through the grating enters the water collecting tank and stays in the water collecting tank for 2 hours, and meanwhile, the water quantity adjusting function is achieved.
s2, steam pretreatment:
the concentration of pollutants in the organic wastewater is high, the wastewater is heated by steam, and the heated wastewater enters a distillation tower, so that part of organic pollutants in the wastewater are evaporated, condensed and recovered in a solvent form.
s3, complete mixing aeration adjusting tank:
and (4) enabling pollutants which cannot be volatilized in the s2 to flow into the complete mixing aeration regulating reservoir along with water. The sewage contains a large amount of microorganisms adaptive to the sewage, and the microorganisms have spontaneous flocculation property and form a natural flocculant. When the microorganisms in the sewage enter the aeration tank, the microorganisms are quickly flocculated together under the induction and promotion of the original zoogloea in the aeration tank, and the flocculate structure is similar to the zoogloea, so that the microorganisms are used for destabilizing and adsorbing organic substances in the sewage. And the prokaryote has small volume, large specific surface area, high bacterial reproduction speed and strong activity, and the surface structure properties of suspended matters, colloidal particles and macromolecular compounds are changed through enzymolysis, so that the activated sludge in the aeration tank has higher adsorption capacity on organic matters and suspended matters in water. So that flocculation, sedimentation, adsorption and biological oxidation absorption exist in the complete mixing aeration regulating tank.
s4, primary sedimentation tank:
and (4) adding a medicament into the wastewater treated in the step s3 through a coagulating sedimentation tank for coagulation, so that part of impurities and SS are well removed.
The biological treatment system comprises the following steps:
s5, ECHAP aeration regulation hydrolysis acidification pool:
the ECHAP reactor is added into the waste water filtered in the s4, the biological filler is added, and a small amount of aeration is added, so that the effect of balancing water quality is achieved, and the microorganisms attached to the surface of the filler can perform pre-degradation and hydrolytic acidification on the incoming water. ECHAP reactor, the pond is filled porous mineral substance and is packed, and the carrier that packs as the microorganism can be fixed and hold back a large amount of microorganisms, carries out micro-aeration in the pond, makes the state of forming a facultative anaerobic in whole pond, and facultative anaerobic fungus is as the dominant bacteria crowd, can decompose the organic matter of the difficult degradation of macromolecule in the aquatic, improves the biodegradability of sewage, for subsequent main structure alleviates the burden, improves the clearance. Therefore, in the ECHAP reactor, the effects of regulating the water quantity and balancing the water quality and removing toxic and inhibitory substances in high-concentration wastewater by using the traditional regulating tank can be achieved, and the abundant microbial flora can perform the pre-degradation effect on the wastewater, so that the working environment of subsequent structures is improved, and each structure can play a better role.
s6, HAF composite anaerobic reaction tank:
and (4) the wastewater treated in the step s5 enters an anaerobic reactor, macromolecular organic matters are decomposed into micromolecular easily-degradable organic matters through the action of anaerobic bacteria, and the micromolecular easily-degradable organic matters are thoroughly degraded in an aerobic reaction tank through the action of aerobic bacteria. The HAF composite anaerobic reaction tank has larger impact load resistance and also has the following advantages: (1) the removal rate of COD is more than 50-80%; (2) the rapid start is carried out, and the COD removal rate can reach more than 60 percent after 2 weeks; (3) the material runs at normal temperature, and the impact load resistance is strong; (4) the intermittent operation can be carried out; (5) the anti-blocking capability is strong; (6) no special person is needed for management;
s7, FSBBR flow from bio-bed reaction cell:
and (3) introducing the wastewater treated in the step s6 into an FSBBR flow-free biological bed reaction tank, wherein the wastewater has the conditions of high sphere outflow speed and low sphere inflow speed in the flow, and floating objects in the wastewater are concentrated in a place with the low flow speed to generate a flow-off phenomenon. The solid and organic colloid in the wastewater are separated from the water by the effect of free flowing. Finally, the water stays in the FSBBR flow-out biological bed reaction tank for 10 hours, the impurities stay for 20-25 days or 3-4 weeks, the impurities are biochemically decomposed by biological bacteria attached to the surface of the sphere to become H2O, CO2 and N2, and no sludge is generated as long as the coagulating sedimentation tank removes insoluble inorganic substances, so that the water treatment effect is achieved. The FSBBR flow-separation biological bed reaction tank has the following advantages: (1) the aeration system adopts the stainless steel perforated aeration pipe, solves the problem that the aeration head is easy to break and needs to be replaced, saves investment, is simple to maintain, and has the service life of more than 20 years. (2) The retention time of the impurities is as long as 20 days, which is beneficial to the growth of nitrobacteria and has good denitrification effect. (3) Different from a single biological group of a traditional activated sludge method, a complete food chain can be formed in the FSBBR process, and organic pollutants in water can be thoroughly removed through gradual degradation of microorganisms.
The deep processing system comprises the following steps:
s8, advanced oxidation:
the wastewater treated in the s7 is introduced into a secondary sedimentation tank, so that partial impurities and SS are well removed, and the wastewater is subjected to advanced oxidation treatment, because OH-has strong oxidizability, the wastewater can almost react with most organic matters in the wastewater to break the organic matters into small molecules or completely oxidize the organic matters into CO2, H2O, O2, inorganic salts and the like, new pollution can not be generated generally, the OH-reaction rate is high, the effect on organic pollutants in the wastewater is very quick, the removal effect is good, the speed is high, the damage degree on the organic pollutants in the wastewater can be completely or nearly completely, and various organic pollutants can be effectively removed, automatic control can be realized, and the operability is strong.
S9, discharging water
And (4) introducing the wastewater treated in the step s8 into a final sedimentation tank, removing impurities, and finally introducing the wastewater into a clean water tank.
As a preferable technical scheme, the system also comprises a sludge treatment system, and the sludge treatment system comprises the following steps: firstly, sludge generated in a primary sedimentation tank, a secondary sedimentation tank and a final sedimentation tank is led into a sludge storage tank, wherein supernatant generated in the sludge storage tank flows back to an ECHAP aeration regulation hydrolysis acidification tank for treatment, then a filter press is used for carrying out filter pressing on the sludge, and finally a mud cake generated by the filter press is transported outside.
As a preferable technical scheme, the odor generated in the complete mixing aeration regulating tank, the ECHAP aeration regulating hydrolysis acidification tank and the HAF composite anaerobic reaction tank is collected, and the wastewater contains a large amount of organic matters, wherein some of the organic matters can be converted into sulfur-containing compounds (such as H2S, thiols and thioether), nitrogen-containing compounds (such as amine, amide and indole), halogen and derivatives thereof (such as chlorine and halogenated hydrocarbon), hydrocarbons (such as alkane and aromatic hydrocarbon), oxygen-containing compounds (such as phenol, aldehyde and ketone) and the like under the action of microorganisms. These substances all have an unpleasant odor and some are malodorous substances. Therefore, the odor needs to be collected and then discharged to high altitude.
As a preferable technical scheme, air is introduced into the complete mixing aeration adjusting tank and the FSBBR flow-leaving biological bed reaction tank by a blower. The purpose of the blower is to add enough dissolved oxygen to water or liquid to meet the requirement of aerobic organisms on oxygen and to have enough pressure, and the blower aeration process is a process for transferring molecular mass between gas and liquid, so that the gas is fully diffused and contacted in the liquid and suspended matters in the liquid are prevented from sinking, and the aeration blower is required to be capable of generating enough pressure.
(III) advantageous effects
The invention has the beneficial effects that:
(1) ECHAP reactor, the pond is filled porous mineral substance and is packed, and the carrier that packs as the microorganism can be fixed and hold back a large amount of microorganisms, carries out micro-aeration in the pond, makes the state of forming a facultative anaerobic in whole pond, and facultative anaerobic fungus is as the dominant bacteria crowd, can decompose the organic matter of the difficult degradation of macromolecule in the aquatic, improves the biodegradability of sewage, for subsequent main structure alleviates the burden, improves the clearance. Therefore, in the ECHAP reactor, the effects of regulating the water quantity and balancing the water quality and removing toxic and inhibitory substances in high-concentration wastewater by using the traditional regulating tank can be achieved, and the abundant microbial flora can perform the pre-degradation effect on the wastewater, so that the working environment of subsequent structures is improved, and each structure can play a better role.
(2) The HAF composite anaerobic reaction tank has larger impact load resistance and also has the following advantages: (1) the removal rate of COD is more than 50-80%; (2) the rapid start is carried out, and the COD removal rate can reach more than 60 percent after 2 weeks; (3) the material runs at normal temperature, and the impact load resistance is strong; (4) the intermittent operation can be carried out; (5) the anti-blocking capability is strong; (6) no special person is needed for management.
(3) The FSBBR flow-separation biological bed reaction tank has the following advantages: (1) the aeration system adopts the stainless steel perforated aeration pipe, solves the problem that the aeration head is easy to break and needs to be replaced, saves investment, is simple to maintain, and has the service life of more than 20 years. (2) The retention time of the impurities is as long as 20 days, which is beneficial to the growth of nitrobacteria and has good denitrification effect. (3) Different from a single biological group of a traditional activated sludge method, a complete food chain can be formed in the FSBBR process, and organic pollutants in water can be thoroughly removed through gradual degradation of microorganisms.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flow chart of a process for making a silk fabric according to the present invention;
Detailed Description
The process for purifying and treating urban organic wastewater of the invention is further explained by combining with the attached drawings, and the invention is further detailed by combining with the embodiment:
the first embodiment is as follows:
a process for purifying and treating the organic sewage in city is composed of pretreatment system, biologic treatment system, and advanced treatment system, and the pretreatment system includes the following steps:
s1, setting fine grids:
the fine grating is arranged at the water inlet to remove larger floaters in the wastewater, the load of the subsequent treatment unit is reduced, the normal operation of the subsequent treatment unit is ensured, the sewage after passing through the grating enters the water collecting tank and stays in the water collecting tank for 2 hours, and meanwhile, the water quantity adjusting function is achieved.
s2, steam pretreatment:
the concentration of pollutants in the organic wastewater is high, the wastewater is heated by steam, and the heated wastewater enters a distillation tower, so that part of organic pollutants in the wastewater are evaporated, condensed and recovered in a solvent form.
s3, complete mixing aeration adjusting tank:
and (4) enabling pollutants which cannot be volatilized in the s2 to flow into the complete mixing aeration regulating reservoir along with water. The sewage contains a large amount of microorganisms adaptive to the sewage, and the microorganisms have spontaneous flocculation property and form a natural flocculant. When the microorganisms in the sewage enter the aeration tank, the microorganisms are quickly flocculated together under the induction and promotion of the original zoogloea in the aeration tank, and the flocculate structure is similar to the zoogloea, so that the microorganisms are used for destabilizing and adsorbing organic substances in the sewage. And the prokaryote has small volume, large specific surface area, high bacterial reproduction speed and strong activity, and the surface structure properties of suspended matters, colloidal particles and macromolecular compounds are changed through enzymolysis, so that the activated sludge in the aeration tank has higher adsorption capacity on organic matters and suspended matters in water. So that flocculation, sedimentation, adsorption and biological oxidation absorption exist in the complete mixing aeration regulating tank.
s4, primary sedimentation tank:
and (4) adding a medicament into the wastewater treated in the step s3 through a coagulating sedimentation tank for coagulation, so that part of impurities and SS are well removed.
The biological treatment system comprises the following steps:
s5, ECHAP aeration regulation hydrolysis acidification pool:
the ECHAP reactor is added into the waste water filtered in the s4, the biological filler is added, and a small amount of aeration is added, so that the effect of balancing water quality is achieved, and the microorganisms attached to the surface of the filler can perform pre-degradation and hydrolytic acidification on the incoming water. ECHAP reactor, the pond is filled porous mineral substance and is packed, and the carrier that packs as the microorganism can be fixed and hold back a large amount of microorganisms, carries out micro-aeration in the pond, makes the state of forming a facultative anaerobic in whole pond, and facultative anaerobic fungus is as the dominant bacteria crowd, can decompose the organic matter of the difficult degradation of macromolecule in the aquatic, improves the biodegradability of sewage, for subsequent main structure alleviates the burden, improves the clearance. Therefore, in the ECHAP reactor, the effects of regulating the water quantity and balancing the water quality and removing toxic and inhibitory substances in high-concentration wastewater by using the traditional regulating tank can be achieved, and the abundant microbial flora can perform the pre-degradation effect on the wastewater, so that the working environment of subsequent structures is improved, and each structure can play a better role.
s6, HAF composite anaerobic reaction tank:
and (4) the wastewater treated in the step s5 enters an anaerobic reactor, macromolecular organic matters are decomposed into micromolecular easily-degradable organic matters through the action of anaerobic bacteria, and the micromolecular easily-degradable organic matters are thoroughly degraded in an aerobic reaction tank through the action of aerobic bacteria. The HAF composite anaerobic reaction tank has larger impact load resistance and also has the following advantages: (1) the removal rate of COD is more than 50-80%; (2) the rapid start is carried out, and the COD removal rate can reach more than 60 percent after 2 weeks; (3) the material runs at normal temperature, and the impact load resistance is strong; (4) the intermittent operation can be carried out; (5) the anti-blocking capability is strong; (6) no special person is needed for management;
s7, FSBBR flow from bio-bed reaction cell:
and (3) introducing the wastewater treated in the step s6 into an FSBBR flow-free biological bed reaction tank, wherein the wastewater has the conditions of high sphere outflow speed and low sphere inflow speed in the flow, and floating objects in the wastewater are concentrated in a place with the low flow speed to generate a flow-off phenomenon. The solid and organic colloid in the wastewater are separated from the water by the effect of free flowing. Finally, the water stays in the FSBBR flow-out biological bed reaction tank for 10 hours, the impurities stay for 20 days or 3 weeks, and are biochemically decomposed by biological bacteria attached to the surface of the sphere to become H2O, CO2 and N2, and no sludge is generated as long as the coagulating sedimentation tank removes insoluble inorganic substances, so that the water treatment effect is achieved. The FSBBR flow-separation biological bed reaction tank has the following advantages: (1) the aeration system adopts the stainless steel perforated aeration pipe, solves the problem that the aeration head is easy to break and needs to be replaced, saves investment, is simple to maintain, and has the service life of more than 20 years. (2) The retention time of the impurities is as long as 20 days, which is beneficial to the growth of nitrobacteria and has good denitrification effect. (3) Different from a single biological group of a traditional activated sludge method, a complete food chain can be formed in the FSBBR process, and organic pollutants in water can be thoroughly removed through gradual degradation of microorganisms.
The deep processing system comprises the following steps:
s8, advanced oxidation:
the wastewater treated in the s7 is introduced into a secondary sedimentation tank, so that partial impurities and SS are well removed, and the wastewater is subjected to advanced oxidation treatment, because OH-has strong oxidizability, the wastewater can almost react with most organic matters in the wastewater to break the organic matters into small molecules or completely oxidize the organic matters into CO2, H2O, O2, inorganic salts and the like, new pollution can not be generated generally, the OH-reaction rate is high, the effect on organic pollutants in the wastewater is very quick, the removal effect is good, the speed is high, the damage degree on the organic pollutants in the wastewater can be completely or nearly completely, and various organic pollutants can be effectively removed, automatic control can be realized, and the operability is strong.
S9, discharging water
And (4) introducing the wastewater treated in the step s8 into a final sedimentation tank, removing impurities, and finally introducing the wastewater into a clean water tank.
Further, the system also comprises a sludge treatment system, wherein the sludge treatment system comprises the following steps: firstly, sludge generated in a primary sedimentation tank, a secondary sedimentation tank and a final sedimentation tank is led into a sludge storage tank, wherein supernatant generated in the sludge storage tank flows back to an ECHAP aeration regulation hydrolysis acidification tank for treatment, then a filter press is used for carrying out filter pressing on the sludge, and finally a mud cake generated by the filter press is transported outside.
Furthermore, the odor generated in the complete mixing aeration regulating tank, the ECHAP aeration regulating hydrolysis acidification tank and the HAF composite anaerobic reaction tank is collected, and the wastewater contains a large amount of organic matters, wherein some of the organic matters can be converted into sulfur-containing compounds (such as H2S, thiols and thioether), nitrogen-containing compounds (such as amines, amides and indole), halogens and derivatives thereof (such as chlorine and halogenated hydrocarbon), hydrocarbons (such as alkane, aromatic hydrocarbon and the like), oxygen-containing compounds (such as phenol, aldehyde and ketone) and the like under the action of microorganisms. These substances all have an unpleasant odor and some are malodorous substances. Therefore, the odor needs to be collected and then discharged to high altitude.
Further, air is blown into the complete mixing aeration adjusting tank and the FSBBR flow-leaving biological bed reaction tank by a blower. The purpose of the blower is to add enough dissolved oxygen to water or liquid to meet the requirement of aerobic organisms on oxygen and to have enough pressure, and the blower aeration process is a process for transferring molecular mass between gas and liquid, so that the gas is fully diffused and contacted in the liquid and suspended matters in the liquid are prevented from sinking, and the aeration blower is required to be capable of generating enough pressure.
Example two:
a process for purifying and treating the organic sewage in city is composed of pretreatment system, biologic treatment system, and advanced treatment system, and the pretreatment system includes the following steps:
s1, setting fine grids:
the fine grating is arranged at the water inlet to remove larger floaters in the wastewater, the load of the subsequent treatment unit is reduced, the normal operation of the subsequent treatment unit is ensured, the sewage after passing through the grating enters the water collecting tank and stays in the water collecting tank for 2 hours, and meanwhile, the water quantity adjusting function is achieved.
s2, steam pretreatment:
the concentration of pollutants in the organic wastewater is high, the wastewater is heated by steam, and the heated wastewater enters a distillation tower, so that part of organic pollutants in the wastewater are evaporated, condensed and recovered in a solvent form.
s3, complete mixing aeration adjusting tank:
and (4) enabling pollutants which cannot be volatilized in the s2 to flow into the complete mixing aeration regulating reservoir along with water. The sewage contains a large amount of microorganisms adaptive to the sewage, and the microorganisms have spontaneous flocculation property and form a natural flocculant. When the microorganisms in the sewage enter the aeration tank, the microorganisms are quickly flocculated together under the induction and promotion of the original zoogloea in the aeration tank, and the flocculate structure is similar to the zoogloea, so that the microorganisms are used for destabilizing and adsorbing organic substances in the sewage. And the prokaryote has small volume, large specific surface area, high bacterial reproduction speed and strong activity, and the surface structure properties of suspended matters, colloidal particles and macromolecular compounds are changed through enzymolysis, so that the activated sludge in the aeration tank has higher adsorption capacity on organic matters and suspended matters in water. So that flocculation, sedimentation, adsorption and biological oxidation absorption exist in the complete mixing aeration regulating tank.
s4, primary sedimentation tank:
and (4) adding a medicament into the wastewater treated in the step s3 through a coagulating sedimentation tank for coagulation, so that part of impurities and SS are well removed.
The biological treatment system comprises the following steps:
s5, ECHAP aeration regulation hydrolysis acidification pool:
the ECHAP reactor is added into the waste water filtered in the s4, the biological filler is added, and a small amount of aeration is added, so that the effect of balancing water quality is achieved, and the microorganisms attached to the surface of the filler can perform pre-degradation and hydrolytic acidification on the incoming water. ECHAP reactor, the pond is filled porous mineral substance and is packed, and the carrier that packs as the microorganism can be fixed and hold back a large amount of microorganisms, carries out micro-aeration in the pond, makes the state of forming a facultative anaerobic in whole pond, and facultative anaerobic fungus is as the dominant bacteria crowd, can decompose the organic matter of the difficult degradation of macromolecule in the aquatic, improves the biodegradability of sewage, for subsequent main structure alleviates the burden, improves the clearance. Therefore, in the ECHAP reactor, the effects of regulating the water quantity and balancing the water quality and removing toxic and inhibitory substances in high-concentration wastewater by using the traditional regulating tank can be achieved, and the abundant microbial flora can perform the pre-degradation effect on the wastewater, so that the working environment of subsequent structures is improved, and each structure can play a better role.
s6, HAF composite anaerobic reaction tank:
and (4) the wastewater treated in the step s5 enters an anaerobic reactor, macromolecular organic matters are decomposed into micromolecular easily-degradable organic matters through the action of anaerobic bacteria, and the micromolecular easily-degradable organic matters are thoroughly degraded in an aerobic reaction tank through the action of aerobic bacteria. The HAF composite anaerobic reaction tank has larger impact load resistance and also has the following advantages: (1) the removal rate of COD is more than 50-80%; (2) the rapid start is carried out, and the COD removal rate can reach more than 60 percent after 2 weeks; (3) the material runs at normal temperature, and the impact load resistance is strong; (4) the intermittent operation can be carried out; (5) the anti-blocking capability is strong; (6) no special person is needed for management;
s7, FSBBR flow from bio-bed reaction cell:
and (3) introducing the wastewater treated in the step s6 into an FSBBR flow-free biological bed reaction tank, wherein the wastewater has the conditions of high sphere outflow speed and low sphere inflow speed in the flow, and floating objects in the wastewater are concentrated in a place with the low flow speed to generate a flow-off phenomenon. The solid and organic colloid in the wastewater are separated from the water by the effect of free flowing. Finally, the water stays in the FSBBR flow-out biological bed reaction tank for 10 hours, and the impurities stay for 25 days or 4 weeks, are biochemically decomposed by biological bacteria attached to the surface of the sphere and become H2O, CO2 and N2, and no sludge is generated as long as the coagulating sedimentation tank removes insoluble inorganic substances, so that the water treatment effect is achieved. The FSBBR flow-separation biological bed reaction tank has the following advantages: (1) the aeration system adopts the stainless steel perforated aeration pipe, solves the problem that the aeration head is easy to break and needs to be replaced, saves investment, is simple to maintain, and has the service life of more than 20 years. (2) The retention time of the impurities is as long as 20 days, which is beneficial to the growth of nitrobacteria and has good denitrification effect. (3) Different from a single biological group of a traditional activated sludge method, a complete food chain can be formed in the FSBBR process, and organic pollutants in water can be thoroughly removed through gradual degradation of microorganisms.
The deep processing system comprises the following steps:
s8, advanced oxidation:
the wastewater treated in the s7 is introduced into a secondary sedimentation tank, so that partial impurities and SS are well removed, and the wastewater is subjected to advanced oxidation treatment, because OH-has strong oxidizability, the wastewater can almost react with most organic matters in the wastewater to break the organic matters into small molecules or completely oxidize the organic matters into CO2, H2O, O2, inorganic salts and the like, new pollution can not be generated generally, the OH-reaction rate is high, the effect on organic pollutants in the wastewater is very quick, the removal effect is good, the speed is high, the damage degree on the organic pollutants in the wastewater can be completely or nearly completely, and various organic pollutants can be effectively removed, automatic control can be realized, and the operability is strong.
S9, discharging water
And (4) introducing the wastewater treated in the step s8 into a final sedimentation tank, removing impurities, and finally introducing the wastewater into a clean water tank.
Further, the system also comprises a sludge treatment system, wherein the sludge treatment system comprises the following steps: firstly, sludge generated in a primary sedimentation tank, a secondary sedimentation tank and a final sedimentation tank is led into a sludge storage tank, wherein supernatant generated in the sludge storage tank flows back to an ECHAP aeration regulation hydrolysis acidification tank for treatment, then a filter press is used for carrying out filter pressing on the sludge, and finally a mud cake generated by the filter press is transported outside.
Furthermore, the odor generated in the complete mixing aeration regulating tank, the ECHAP aeration regulating hydrolysis acidification tank and the HAF composite anaerobic reaction tank is collected, and the wastewater contains a large amount of organic matters, wherein some of the organic matters can be converted into sulfur-containing compounds (such as H2S, thiols and thioether), nitrogen-containing compounds (such as amines, amides and indole), halogens and derivatives thereof (such as chlorine and halogenated hydrocarbon), hydrocarbons (such as alkane, aromatic hydrocarbon and the like), oxygen-containing compounds (such as phenol, aldehyde and ketone) and the like under the action of microorganisms. These substances all have an unpleasant odor and some are malodorous substances. Therefore, the odor needs to be collected and then discharged to high altitude.
Further, air is blown into the complete mixing aeration adjusting tank and the FSBBR flow-leaving biological bed reaction tank by a blower. The purpose of the blower is to add enough dissolved oxygen to water or liquid to meet the requirement of aerobic organisms on oxygen and to have enough pressure, and the blower aeration process is a process for transferring molecular mass between gas and liquid, so that the gas is fully diffused and contacted in the liquid and suspended matters in the liquid are prevented from sinking, and the aeration blower is required to be capable of generating enough pressure.
The above embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the spirit and scope of the present invention, and various modifications and improvements made to the technical solutions of the present invention by those skilled in the art without departing from the design concept of the present invention shall fall within the protection scope of the present invention, and the technical contents of the present invention as claimed are all described in the claims.
Claims (4)
1. A process for purifying and treating urban organic wastewater is characterized by comprising the following steps: the pretreatment system comprises a pretreatment system, a biological treatment system and an advanced treatment system, and comprises the following steps:
s1, setting fine grids:
the fine grating is arranged at the water inlet to remove larger floaters in the wastewater, the load of the subsequent treatment unit is reduced, the normal operation of the subsequent treatment unit is ensured, the sewage after passing through the grating enters the water collecting tank and stays in the water collecting tank for 2 hours, and meanwhile, the water quantity adjusting function is achieved.
s2, steam pretreatment:
the concentration of pollutants in the organic wastewater is high, the wastewater is heated by steam, and the heated wastewater enters a distillation tower, so that part of organic pollutants in the wastewater are evaporated, condensed and recovered in a solvent form.
s3, complete mixing aeration adjusting tank:
and (4) enabling pollutants which cannot be volatilized in the s2 to flow into the complete mixing aeration regulating reservoir along with water.
s4, primary sedimentation tank:
and (4) adding a medicament into the wastewater treated in the step s3 through a coagulating sedimentation tank for coagulation, so that part of impurities and SS are well removed.
The biological treatment system comprises the following steps:
s5, ECHAP aeration regulation hydrolysis acidification pool:
the ECHAP reactor is added into the waste water filtered in the s4, the biological filler is added, and a small amount of aeration is added, so that the effect of balancing water quality is achieved, and the microorganisms attached to the surface of the filler can perform pre-degradation and hydrolytic acidification on the incoming water.
s6, HAF composite anaerobic reaction tank:
and (4) the wastewater treated in the step s5 enters an anaerobic reactor, macromolecular organic matters are decomposed into micromolecular easily-degradable organic matters through the action of anaerobic bacteria, and the micromolecular easily-degradable organic matters are thoroughly degraded in an aerobic reaction tank through the action of aerobic bacteria.
s7, FSBBR flow from bio-bed reaction cell:
and (3) introducing the wastewater treated in the step s6 into an FSBBR flow-free biological bed reaction tank, wherein the wastewater has the conditions of high sphere outflow speed and low sphere inflow speed in the flow, and floating objects in the wastewater are concentrated in a place with the low flow speed to generate a flow-off phenomenon. The solid and organic colloid in the wastewater are separated from the water by the effect of free flowing. Finally, the water stays in the FSBBR flow-out biological bed reaction tank for 10 hours, the impurities stay for 20-25 days or 3-4 weeks, the impurities are biochemically decomposed by biological bacteria attached to the surface of the sphere to become H2O, CO2 and N2, and no sludge is generated as long as the coagulating sedimentation tank removes insoluble inorganic substances, so that the water treatment effect is achieved.
The deep processing system comprises the following steps:
s8, advanced oxidation:
and (4) introducing the wastewater treated in the step s7 into a secondary sedimentation tank to well remove part of impurities and SS, and then carrying out advanced oxidation treatment on the wastewater.
S9, discharging water
And (4) introducing the wastewater treated in the step s8 into a final sedimentation tank, removing impurities, and finally introducing the wastewater into a clean water tank.
2. The urban organic wastewater purification treatment process according to claim 1, characterized in that: the system also comprises a sludge treatment system, wherein the sludge treatment system comprises the following steps: firstly, sludge generated in the primary sedimentation tank, the secondary sedimentation tank and the final sedimentation tank is introduced into a sludge storage tank, wherein supernatant generated in the sludge storage tank flows back to an ECHAP aeration regulation hydrolysis acidification tank for treatment, then a filter press is used for carrying out filter pressing on the sludge, and finally a mud cake generated by the filter press is transported outside.
3. The urban organic wastewater purification treatment process according to claim 2, characterized in that: and collecting odor generated in the complete mixing aeration adjusting tank, the ECHAP aeration adjusting hydrolysis acidification tank and the HAF composite anaerobic reaction tank.
4. The urban organic wastewater purification treatment process according to claim 2, characterized in that: and in the complete mixing aeration regulating tank, the FSBBR flow-leaving biological bed reaction tank is aerated by a blower.
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| CN116239264A (en) * | 2023-03-24 | 2023-06-09 | 吴桥县六合德利化工有限责任公司 | Waste water recovery process for preparing sodium o-sulfonate benzaldehyde |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116239264A (en) * | 2023-03-24 | 2023-06-09 | 吴桥县六合德利化工有限责任公司 | Waste water recovery process for preparing sodium o-sulfonate benzaldehyde |
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Application publication date: 20200327 |